1 | /** |
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2 | * This software is copyright (c) 2012 by - TXM (http://txm.sourceforge.net/), |
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3 | * Seminar fuer Sprachwissenschaft (http://www.sfs.uni-tuebingen.de/) This is |
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4 | * free software. You can redistribute it and/or modify it under the terms |
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5 | * described in the GNU General Public License v3 of which you should have |
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6 | * received a copy. Otherwise you can download it from |
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7 | * |
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8 | * http://www.gnu.org/licenses/gpl-3.0.txt |
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9 | * |
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10 | * @copyright Seminar fuer Sprachwissenschaft (http://www.sfs.uni-tuebingen.de/) |
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11 | * |
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12 | * @license http://www.gnu.org/licenses/gpl-3.0.txt GNU General Public License |
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13 | * v3 |
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14 | */ |
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15 | package eu.clarin.cqi.client; |
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16 | |
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17 | import java.io.*; |
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18 | import java.net.InetSocketAddress; |
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19 | import java.net.Socket; |
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20 | import java.net.SocketAddress; |
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21 | import java.nio.charset.Charset; |
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22 | |
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23 | /** |
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24 | * This class implements a Java CQi client. |
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25 | * |
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26 | * @author Jean-Philippe Magué |
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27 | */ |
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28 | public class CqiClient { |
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29 | |
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30 | private static final byte[] CQI_PADDING = {(byte) 0x00}; |
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31 | private static final byte[] CQI_STATUS_OK = {(byte) 0x01, (byte) 0x01}; |
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32 | private static final byte[] CQI_STATUS_CONNECT_OK = {(byte) 0x01, (byte) 0x02}; |
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33 | private static final byte[] CQI_STATUS_BYE_OK = {(byte) 0x01, (byte) 0x03}; |
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34 | private static final byte[] CQI_STATUS_PING_OK = {(byte) 0x01, (byte) 0x04}; |
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35 | private static final byte[] CQI_DATA_BYTE = {(byte) 0x03, (byte) 0x01}; |
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36 | private static final byte[] CQI_DATA_BOOL = {(byte) 0x03, (byte) 0x02}; |
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37 | private static final byte[] CQI_DATA_INT = {(byte) 0x03, (byte) 0x03}; |
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38 | private static final byte[] CQI_DATA_STRING = {(byte) 0x03, (byte) 0x04}; |
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39 | private static final byte[] CQI_DATA_BYTE_LIST = {(byte) 0x03, (byte) 0x05}; |
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40 | private static final byte[] CQI_DATA_BOOL_LIST = {(byte) 0x03, (byte) 0x06}; |
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41 | private static final byte[] CQI_DATA_INT_LIST = {(byte) 0x03, (byte) 0x07}; |
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42 | private static final byte[] CQI_DATA_STRING_LIST = {(byte) 0x03, (byte) 0x08}; |
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43 | private static final byte[] CQI_DATA_INT_INT = {(byte) 0x03, (byte) 0x09}; |
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44 | private static final byte[] CQI_DATA_INT_INT_INT_INT = {(byte) 0x03, (byte) 0x0A}; |
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45 | private static final byte[] CQI_DATA_INT_TABLE = {(byte) 0x03, (byte) 0x0B}; |
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46 | private static final byte[] CQI_CTRL_CONNECT = {(byte) 0x11, (byte) 0x01}; |
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47 | private static final byte[] CQI_CTRL_BYE = {(byte) 0x11, (byte) 0x02}; |
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48 | private static final byte[] CQI_CTRL_LAST_GENERAL_ERROR = {(byte) 0x11, (byte) 0x05}; |
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49 | private static final byte[] CQI_CTRL_LAST_CQP_ERROR = {(byte) 0x11, (byte) 0x06}; |
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50 | private static final byte[] CQI_CORPUS_LIST_CORPORA = {(byte) 0x13, (byte) 0x01}; |
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51 | private static final byte[] CQI_CORPUS_CHARSET = {(byte) 0x13, (byte) 0x03}; |
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52 | private static final byte[] CQI_CORPUS_POSITIONAL_ATTRIBUTES = {(byte) 0x13, (byte) 0x05}; |
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53 | private static final byte[] CQI_CORPUS_STRUCTURAL_ATTRIBUTES = {(byte) 0x13, (byte) 0x06}; |
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54 | private static final byte[] CQI_CORPUS_STRUCTURAL_ATTRIBUTE_HAS_VALUES = {(byte) 0x13, (byte) 0x07}; |
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55 | private static final byte[] CQI_CORPUS_FULL_NAME = {(byte) 0x13, (byte) 0x09}; |
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56 | private static final byte[] CQI_CL_CPOS2STR = {(byte) 0x14, (byte) 0x08}; |
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57 | private static final byte[] CQI_CL_CPOS2STRUC = {(byte) 0x14, (byte) 0x09}; |
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58 | private static final byte[] CQI_CL_CPOS2LBOUND = {(byte) 0x14, (byte) 0x20}; |
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59 | private static final byte[] CQI_CL_CPOS2RBOUND = {(byte) 0x14, (byte) 0x21}; |
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60 | private static final byte[] CQI_CL_STRUC2STR = {(byte) 0x14, (byte) 0x0B}; |
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61 | private static final byte[] CQI_CQP_QUERY = {(byte) 0x15, (byte) 0x01}; |
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62 | private static final byte[] CQI_CQP_SUBCORPUS_SIZE = {(byte) 0x15, (byte) 0x03}; |
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63 | private static final byte[] CQI_CQP_DUMP_SUBCORPUS = {(byte) 0x15, (byte) 0x05}; |
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64 | private static final byte[] CQI_CQP_DROP_SUBCORPUS = {(byte) 0x15, (byte) 0x09}; |
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65 | private static final Charset DEFAULT_CHARSET = Charset.forName("ASCII"); |
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66 | public static final byte CQI_CONST_FIELD_MATCH = (byte) 0x10; |
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67 | public static final byte CQI_CONST_FIELD_MATCHEND = (byte) 0x11; |
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68 | public static final byte CQI_CONST_FIELD_TARGET = (byte) 0x00; |
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69 | /** |
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70 | * Error messages |
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71 | */ |
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72 | private static final String UNEXPECTED_ANSWER = "Unexpected answer"; |
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73 | private static final String SERVER_NOT_FOUND = "Server not found"; |
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74 | private static final String INTERNAL_ERROR = "Internal error"; |
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75 | private static final String INTERNAL_CQI_ERROR = "Internal CQI error"; |
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76 | private static final String INTERNAL_CQP_ERROR = "Internal CQP error"; |
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77 | private static final String INTERNAL_CL_ERROR = "Internal CL error"; |
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78 | private static final String OUT_OF_MEMORY_ERROR = "Out of memory"; |
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79 | private static final String CORPUS_ACCESS_ERROR = "Corpus access error"; |
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80 | private static final String WRONG_ATTRIBUTE_TYPE_ERROR = "Wrong attribute type"; |
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81 | private static final String OUT_OF_RANGE_ERROR = "Out of range"; |
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82 | private static final String REGEX_ERROR = "Regex error"; |
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83 | private static final String NO_SUCH_ATTRIBUTE_ERROR = "No such attribute"; |
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84 | private static final String NO_SUCH_CORPUS_CQP_ERROR = "No such corpus"; |
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85 | private static final String INVALID_FIELD_CQP_ERROR = "Invalid field"; |
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86 | private static final String OUT_OF_RANGE_CQP_ERROR = "Out of range"; |
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87 | private static final String SYNTAX_CQP_ERROR = "CQP Syntax error"; |
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88 | private static final String GENERAL_SQP_ERROR = "General CQP error"; |
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89 | private static final String CONNECTION_REFUSED_ERROR = "Connection refused"; |
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90 | private static final String USER_ABORT_ERROR = "User abort"; |
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91 | private static final String SYNTAX_ERROR = "Syntax error"; |
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92 | private static final String GENERAL_ERROR = "General error"; |
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93 | private static final String INSUFFICIENT_BUFFER_SIZE = "Insufficient buffer size"; |
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94 | private static final String SERVER_IO_ERROR = "IO Error while communicating to the server"; |
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95 | private static final int BUFFER_SIZE = 40; |
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96 | private Socket socket; |
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97 | private SocketAddress serverAddress; |
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98 | private DataOutput streamToServer; |
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99 | private DataInput streamFromServer; |
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100 | private final byte[] buffer = new byte[BUFFER_SIZE]; |
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101 | |
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102 | /** |
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103 | * Instantiates a new cqi client. |
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104 | * |
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105 | * @param host the host of the CQI server |
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106 | * @param port the port of the CQI server |
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107 | * |
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108 | * @throws CqiClientException the server not found exception |
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109 | */ |
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110 | public CqiClient(String host, int port) throws CqiClientException { |
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111 | try { |
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112 | this.socket = new Socket(); |
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113 | this.serverAddress = new InetSocketAddress(host, port); |
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114 | this.socket.connect(serverAddress); |
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115 | this.streamToServer = new DataOutputStream(this.socket.getOutputStream()); |
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116 | this.streamFromServer = new DataInputStream(this.socket.getInputStream()); |
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117 | } catch (IOException e) { |
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118 | throw new CqiClientException(SERVER_NOT_FOUND, e); |
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119 | } |
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120 | } |
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121 | |
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122 | /** |
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123 | * Connect the client to a server |
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124 | * |
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125 | * @param username the username |
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126 | * @param password the password |
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127 | * @return true, if successful |
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128 | * @throws CqiClientException |
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129 | */ |
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130 | public synchronized boolean connect(String username, String password) |
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131 | throws CqiClientException { |
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132 | try { |
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133 | this.streamToServer.write(CQI_CTRL_CONNECT); |
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134 | this.writeString(username); |
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135 | this.writeString(password); |
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136 | return (readHeaderFromServer() == CQI_STATUS_CONNECT_OK); |
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137 | } catch (IOException ex) { |
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138 | throw new CqiClientException(SERVER_IO_ERROR, ex); |
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139 | } |
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140 | } |
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141 | |
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142 | /** |
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143 | * Disconnect |
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144 | * |
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145 | * @return true, if successful |
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146 | * |
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147 | * @throws CqiClientException |
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148 | */ |
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149 | public synchronized boolean disconnect() throws CqiClientException { |
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150 | try { |
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151 | this.streamToServer.write(CQI_CTRL_BYE); |
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152 | return (readHeaderFromServer() == CQI_STATUS_BYE_OK); |
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153 | } catch (IOException ex) { |
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154 | throw new CqiClientException(SERVER_IO_ERROR, ex); |
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155 | } |
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156 | } |
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157 | |
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158 | /** |
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159 | * Lists the corpora available on the server |
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160 | * |
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161 | * @return the name of the corpora |
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162 | * @throws CqiClientException |
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163 | */ |
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164 | public synchronized String[] listCorpora() throws CqiClientException { |
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165 | try { |
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166 | this.streamToServer.write(CQI_CORPUS_LIST_CORPORA); |
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167 | return readStringArray(DEFAULT_CHARSET); |
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168 | } catch (IOException e) { |
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169 | throw new CqiClientException(SERVER_IO_ERROR, e); |
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170 | } |
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171 | } |
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172 | |
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173 | /** |
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174 | * Gives the corpus positional attributes. |
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175 | * |
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176 | * @param corpus the corpus id |
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177 | * @return the name of the attributes |
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178 | * @throws CqiClientException |
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179 | */ |
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180 | public synchronized String[] corpusPositionalAttributes(String corpus) |
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181 | throws CqiClientException { |
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182 | return genericStringToStringArray(corpus, |
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183 | CQI_CORPUS_POSITIONAL_ATTRIBUTES); |
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184 | } |
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185 | |
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186 | /** |
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187 | * Gives the corpus structural attributes. |
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188 | * |
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189 | * @param corpus the corpus |
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190 | * @return the name of the attributes |
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191 | * @throws CqiClientException |
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192 | */ |
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193 | public synchronized String[] corpusStructuralAttributes(String corpus) |
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194 | throws CqiClientException { |
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195 | return genericStringToStringArray(corpus, |
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196 | CQI_CORPUS_STRUCTURAL_ATTRIBUTES); |
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197 | } |
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198 | |
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199 | /** |
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200 | * Check whether a structural attribute has values |
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201 | * |
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202 | * @param attribute the attribute |
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203 | * @return true, if it has values |
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204 | * @throws CqiClientException |
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205 | */ |
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206 | public synchronized boolean corpusStructuralAttributeHasValues( |
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207 | String attribute) throws CqiClientException { |
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208 | try { |
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209 | this.streamToServer.write(CQI_CORPUS_STRUCTURAL_ATTRIBUTE_HAS_VALUES); |
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210 | this.writeString(attribute); |
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211 | return readBoolean(); |
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212 | } catch (IOException e) { |
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213 | throw new CqiClientException(SERVER_IO_ERROR, e); |
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214 | } |
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215 | } |
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216 | |
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217 | /** |
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218 | * Write a string on the socket. |
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219 | * |
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220 | * @param string the string |
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221 | * |
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222 | * @throws IOException Signals that an I/O exception has occurred. |
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223 | */ |
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224 | private synchronized void writeString(String string, Charset charset) throws IOException { |
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225 | byte[] bytes = string.getBytes(charset); |
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226 | this.streamToServer.writeShort(bytes.length); |
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227 | this.streamToServer.write(bytes); |
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228 | } |
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229 | |
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230 | private synchronized void writeString(String string) throws IOException { |
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231 | writeString(string, DEFAULT_CHARSET); |
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232 | } |
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233 | |
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234 | /** |
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235 | * Write int array on the socket. |
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236 | * |
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237 | * @param ints the int array |
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238 | * |
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239 | * @throws IOException Signals that an I/O exception has occurred. |
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240 | */ |
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241 | private synchronized void writeIntArray(int[] ints) throws IOException { |
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242 | int length = ints.length; |
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243 | this.streamToServer.writeInt(length); |
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244 | for (int i = 0; i < length; i++) { |
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245 | this.streamToServer.writeInt(ints[i]); |
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246 | } |
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247 | } |
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248 | |
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249 | /** |
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250 | * Write int array on the socket. |
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251 | * |
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252 | * @param ints the int array |
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253 | * |
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254 | * @throws IOException Signals that an I/O exception has occurred. |
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255 | */ |
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256 | private synchronized void writeIntArray(int[] ints, int length) throws IOException { |
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257 | this.streamToServer.writeInt(length); |
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258 | for (int i = 0; i < length; i++) { |
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259 | this.streamToServer.writeInt(ints[i]); |
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260 | } |
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261 | } |
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262 | |
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263 | /** |
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264 | * Write int array on the socket. |
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265 | * |
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266 | * @param ints the int array |
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267 | * |
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268 | * @throws IOException Signals that an I/O exception has occurred. |
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269 | */ |
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270 | private synchronized void writeIntArray(int from, int to) throws IOException { |
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271 | this.streamToServer.writeInt(to - from + 1); |
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272 | for (int i = from; i <= to; i++) { |
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273 | this.streamToServer.writeInt(i); |
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274 | } |
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275 | } |
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276 | |
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277 | /** |
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278 | * Read a string from the socket. |
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279 | * |
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280 | * @return the string |
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281 | * |
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282 | * @throws CqiClientException Signals that the data read on the socket is |
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283 | * unexpected |
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284 | * @throws IOException Signals that an I/O exception has occurred. |
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285 | */ |
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286 | private synchronized String readString(Charset charset) throws |
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287 | CqiClientException, IOException { |
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288 | if (readHeaderFromServer() != CQI_DATA_STRING) { |
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289 | throw new CqiClientException(UNEXPECTED_ANSWER); |
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290 | } |
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291 | short length = this.streamFromServer.readShort(); |
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292 | byte[] bytes = new byte[length]; |
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293 | this.streamFromServer.readFully(bytes); |
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294 | String res = new String(bytes, charset); |
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295 | return res; |
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296 | } |
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297 | |
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298 | private synchronized String readString() throws |
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299 | CqiClientException, IOException { |
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300 | return readString(DEFAULT_CHARSET); |
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301 | } |
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302 | |
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303 | /** |
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304 | * Read a boolean from the socket. |
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305 | * |
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306 | * @return the boolean |
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307 | * |
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308 | * @throws CqiClientException |
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309 | */ |
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310 | private synchronized boolean readBoolean() throws CqiClientException, |
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311 | IOException { |
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312 | if (readHeaderFromServer() != CQI_DATA_BOOL) { |
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313 | throw new CqiClientException(UNEXPECTED_ANSWER); |
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314 | } |
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315 | return this.streamFromServer.readByte() == 1; |
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316 | } |
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317 | |
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318 | /** |
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319 | * Read an int from the socket. |
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320 | * |
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321 | * @return the int |
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322 | * |
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323 | * @throws CqiClientException Signals that the data read on the socket is |
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324 | * unexpected |
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325 | * @throws IOException Signals that an I/O exception has occurred. |
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326 | */ |
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327 | private synchronized int readInt() throws CqiClientException, IOException { |
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328 | if (readHeaderFromServer() != CQI_DATA_INT) { |
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329 | throw new CqiClientException(UNEXPECTED_ANSWER); |
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330 | } |
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331 | int res = this.streamFromServer.readInt(); |
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332 | return res; |
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333 | } |
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334 | |
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335 | /** |
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336 | * Read a string array from the socket. |
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337 | * |
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338 | * @return the string array |
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339 | * |
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340 | * @throws CqiClientException |
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341 | */ |
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342 | private synchronized String[] readStringArray(Charset charset) |
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343 | throws CqiClientException { |
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344 | try { |
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345 | byte[] header = readHeaderFromServer(); |
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346 | if (header != CQI_DATA_STRING_LIST) { |
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347 | throw new CqiClientException(UNEXPECTED_ANSWER); |
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348 | } |
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349 | int arrayLength = this.streamFromServer.readInt(); |
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350 | String[] strings = new String[arrayLength]; |
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351 | for (int i = 0; i < arrayLength; i++) { |
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352 | short stringLength = this.streamFromServer.readShort(); |
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353 | byte[] bytes = new byte[stringLength]; |
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354 | this.streamFromServer.readFully(bytes); |
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355 | strings[i] = new String(bytes, charset); |
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356 | } |
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357 | return strings; |
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358 | } catch (IOException e) { |
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359 | throw new CqiClientException("Error reading a string array", e); |
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360 | } |
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361 | } |
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362 | |
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363 | /** |
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364 | * Read an int array from the socket. |
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365 | * |
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366 | * @return the int array |
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367 | * |
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368 | * @throws CqiClientException |
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369 | * @throws IOException |
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370 | */ |
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371 | private synchronized void readIntList(int[] output) throws CqiClientException, |
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372 | IOException { |
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373 | if ((readHeaderFromServer()) != CQI_DATA_INT_LIST) { |
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374 | throw new CqiClientException(UNEXPECTED_ANSWER); |
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375 | } |
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376 | int arrayLength = this.streamFromServer.readInt(); |
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377 | if (output.length < arrayLength) { |
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378 | throw new CqiClientException(INSUFFICIENT_BUFFER_SIZE); |
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379 | } |
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380 | int bsize = arrayLength * 4; |
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381 | if (buffer.length < bsize) { |
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382 | throw new CqiClientException(INSUFFICIENT_BUFFER_SIZE); |
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383 | } |
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384 | streamFromServer.readFully(buffer, 0, bsize); |
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385 | for (int i = 0; i + 3 < bsize; i += 4) { |
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386 | output[i >> 2] = bytesToInt(buffer[i], buffer[i + 1], buffer[i + 2], buffer[i + 3]); |
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387 | } |
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388 | } |
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389 | |
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390 | /** |
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391 | * Bytes to int. |
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392 | * |
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393 | * @param a the a |
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394 | * @param b the b |
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395 | * @param c the c |
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396 | * @param d the d |
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397 | * @return the int |
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398 | */ |
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399 | private synchronized static int bytesToInt(byte a, byte b, byte c, byte d) { |
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400 | return (((a & 0xff) << 24) | ((b & 0xff) << 16) | ((c & 0xff) << 8) | (d & 0xff)); |
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401 | } |
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402 | |
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403 | /** |
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404 | * Read the header of the data send by the server. |
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405 | * |
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406 | * @return the header |
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407 | * |
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408 | * @throws CqiClientException\ |
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409 | * @throws IOException |
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410 | */ |
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411 | private synchronized byte[] readHeaderFromServer() |
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412 | throws CqiClientException, IOException { |
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413 | byte b = this.streamFromServer.readByte(); |
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414 | switch (b) { |
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415 | case 0x00:// cf cqi.h:29 |
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416 | return CQI_PADDING; |
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417 | case 0x01:// cf cqi.h:37 |
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418 | b = this.streamFromServer.readByte(); |
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419 | switch (b) { |
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420 | case 0x01:// cf cqi.h:39 |
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421 | return CQI_STATUS_OK; |
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422 | case 0x02:// cf cqi.h:40 |
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423 | return CQI_STATUS_CONNECT_OK; |
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424 | case 0x03:// cf cqi.h:41 |
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425 | return CQI_STATUS_BYE_OK; |
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426 | case 0x04:// cf cqi.h:42 |
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427 | return CQI_STATUS_PING_OK; |
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428 | } |
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429 | break; |
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430 | case 0x02:// cf cqi.h:45 |
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431 | b = this.streamFromServer.readByte(); |
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432 | switch (b) { |
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433 | case 0x01:// cf cqi.h:39 |
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434 | throw new CqiClientException(GENERAL_ERROR); |
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435 | case 0x02:// cf cqi.h:40 |
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436 | throw new CqiClientException(CONNECTION_REFUSED_ERROR); |
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437 | case 0x03:// cf cqi.h:41 |
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438 | throw new CqiClientException(USER_ABORT_ERROR); |
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439 | case 0x04:// cf cqi.h:42 |
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440 | throw new CqiClientException(SYNTAX_ERROR); |
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441 | default: |
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442 | throw new CqiClientException(INTERNAL_CQI_ERROR); |
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443 | } |
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444 | case 0x03:// cf cqi.h:53 |
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445 | b = this.streamFromServer.readByte(); |
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446 | |
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447 | switch (b) { |
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448 | case 0x01:// cf cqi.h:39 |
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449 | return CQI_DATA_BYTE; |
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450 | case 0x02:// cf cqi.h:40 |
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451 | return CQI_DATA_BOOL; |
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452 | case 0x03:// cf cqi.h:41 |
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453 | return CQI_DATA_INT; |
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454 | case 0x04:// cf cqi.h:42 |
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455 | return CQI_DATA_STRING; |
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456 | case 0x05:// cf cqi.h:42 |
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457 | return CQI_DATA_BYTE_LIST; |
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458 | case 0x06:// cf cqi.h:42 |
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459 | return CQI_DATA_BOOL_LIST; |
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460 | case 0x07:// cf cqi.h:42 |
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461 | return CQI_DATA_INT_LIST; |
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462 | case 0x08:// cf cqi.h:42 |
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463 | return CQI_DATA_STRING_LIST; |
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464 | case 0x09:// cf cqi.h:42 |
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465 | return CQI_DATA_INT_INT; |
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466 | case 0x0A:// cf cqi.h:42 |
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467 | return CQI_DATA_INT_INT_INT_INT; |
---|
468 | case 0x0B:// cf cqi.h:42 |
---|
469 | return CQI_DATA_INT_TABLE; |
---|
470 | } |
---|
471 | break; |
---|
472 | case 0x04:// cf cqi.h:67 |
---|
473 | |
---|
474 | b = this.streamFromServer.readByte(); |
---|
475 | switch (b) { |
---|
476 | case 0x01:// cf cqi.h:39 |
---|
477 | throw new CqiClientException(NO_SUCH_ATTRIBUTE_ERROR); |
---|
478 | case 0x02:// cf cqi.h:40 |
---|
479 | throw new CqiClientException(WRONG_ATTRIBUTE_TYPE_ERROR); |
---|
480 | case 0x03:// cf cqi.h:41 |
---|
481 | throw new CqiClientException(OUT_OF_RANGE_ERROR); |
---|
482 | case 0x04:// cf cqi.h:42 |
---|
483 | throw new CqiClientException(REGEX_ERROR + ": " + getLastCqiError()); |
---|
484 | case 0x05:// cf cqi.h:42 |
---|
485 | throw new CqiClientException(CORPUS_ACCESS_ERROR); |
---|
486 | case 0x06:// cf cqi.h:42 |
---|
487 | throw new CqiClientException(OUT_OF_MEMORY_ERROR); |
---|
488 | case 0x07:// cf cqi.h:42 |
---|
489 | throw new CqiClientException(INTERNAL_ERROR); |
---|
490 | default: |
---|
491 | throw new CqiClientException(INTERNAL_CL_ERROR); |
---|
492 | } |
---|
493 | case 0x05:// cf cqi.h:94 |
---|
494 | |
---|
495 | b = this.streamFromServer.readByte(); |
---|
496 | switch (b) { |
---|
497 | case 0x01:// cf cqi.h:39 |
---|
498 | throw new CqiClientException(GENERAL_SQP_ERROR); |
---|
499 | case 0x02:// cf cqi.h:40 |
---|
500 | throw new CqiClientException(NO_SUCH_CORPUS_CQP_ERROR); |
---|
501 | case 0x03:// cf cqi.h:41 |
---|
502 | throw new CqiClientException(INVALID_FIELD_CQP_ERROR); |
---|
503 | case 0x04:// cf cqi.h:42 |
---|
504 | throw new CqiClientException(OUT_OF_RANGE_CQP_ERROR); |
---|
505 | case 0x05:// cf cqi.h:44 |
---|
506 | throw new CqiClientException(SYNTAX_CQP_ERROR + ": " + getLastCQPError()); |
---|
507 | default: |
---|
508 | throw new CqiClientException(INTERNAL_CQP_ERROR); |
---|
509 | } |
---|
510 | } |
---|
511 | return null; |
---|
512 | } |
---|
513 | |
---|
514 | /** |
---|
515 | * Ask the server to execute a function with a String->String signature. |
---|
516 | * |
---|
517 | * @param string the argument |
---|
518 | * @param function the function to be executed |
---|
519 | * @return the result |
---|
520 | * @throws CqiClientException Signals that the data read on the socket is |
---|
521 | * unexpected |
---|
522 | * @throws IOException Signals that an I/O exception has occurred. |
---|
523 | */ |
---|
524 | private synchronized String genericStringToString(String string, |
---|
525 | byte[] function) throws CqiClientException, IOException { |
---|
526 | this.streamToServer.write(function); |
---|
527 | this.writeString(string, DEFAULT_CHARSET); |
---|
528 | return readString(DEFAULT_CHARSET); |
---|
529 | } |
---|
530 | |
---|
531 | /** |
---|
532 | * Ask the server to execute a function with a String->StringArray |
---|
533 | * signature. |
---|
534 | * |
---|
535 | * @param string the argument |
---|
536 | * @param function the function to be executed |
---|
537 | * @return the result |
---|
538 | * @throws CqiClientException |
---|
539 | */ |
---|
540 | private synchronized String[] genericStringToStringArray(String string, |
---|
541 | byte[] function) throws CqiClientException { |
---|
542 | try { |
---|
543 | this.streamToServer.write(function); |
---|
544 | this.writeString(string, DEFAULT_CHARSET); |
---|
545 | } catch (IOException e) { |
---|
546 | throw new CqiClientException(SERVER_IO_ERROR, e); |
---|
547 | } |
---|
548 | return readStringArray(DEFAULT_CHARSET); |
---|
549 | } |
---|
550 | |
---|
551 | /** |
---|
552 | * Ask the server to execute a function with a String x int[]->String[] |
---|
553 | * signature. |
---|
554 | * |
---|
555 | * @param string the string argument |
---|
556 | * @param ints the int[] argument |
---|
557 | * @param function the function to be executed |
---|
558 | * @return the result |
---|
559 | * @throws CqiClientException |
---|
560 | */ |
---|
561 | private synchronized String[] genericStringXIntArraytoStringArray( |
---|
562 | String string, int[] ints, byte[] function, Charset charset) throws |
---|
563 | CqiClientException { |
---|
564 | try { |
---|
565 | this.streamToServer.write(function); |
---|
566 | this.writeString(string, charset); |
---|
567 | this.writeIntArray(ints); |
---|
568 | String[] res = readStringArray(charset); |
---|
569 | return res; |
---|
570 | } catch (IOException e) { |
---|
571 | throw new CqiClientException(SERVER_IO_ERROR, e); |
---|
572 | } |
---|
573 | } |
---|
574 | |
---|
575 | /** |
---|
576 | * Ask the server to execute a function with a String x int[]->String[] |
---|
577 | * signature. |
---|
578 | * |
---|
579 | * @param string the string argument |
---|
580 | * @param ints the int[] argument |
---|
581 | * @param function the function to be executed |
---|
582 | * @return the result |
---|
583 | * @throws CqiClientException |
---|
584 | */ |
---|
585 | private synchronized String[] genericStringXIntArraytoStringArray( |
---|
586 | String string, int fromPosition, int toPosition, byte[] function, Charset charset) throws |
---|
587 | CqiClientException { |
---|
588 | try { |
---|
589 | this.streamToServer.write(function); |
---|
590 | this.writeString(string, charset); |
---|
591 | this.writeIntArray(fromPosition, toPosition); |
---|
592 | String[] res = readStringArray(charset); |
---|
593 | return res; |
---|
594 | } catch (IOException e) { |
---|
595 | throw new CqiClientException(SERVER_IO_ERROR, e); |
---|
596 | } |
---|
597 | |
---|
598 | } |
---|
599 | |
---|
600 | /** |
---|
601 | * Ask the server to execute a function with a String x int[]->int[] |
---|
602 | * signature. |
---|
603 | * |
---|
604 | * @param string the string argument |
---|
605 | * @param ints the int[] argument |
---|
606 | * @param function the function to be executed |
---|
607 | * @return the result |
---|
608 | * @throws CqiClientException |
---|
609 | */ |
---|
610 | private synchronized void genericStringXIntArraytoIntArray(String string, |
---|
611 | int[] ints, byte[] function, int[] output, int size) throws CqiClientException { |
---|
612 | try { |
---|
613 | this.streamToServer.write(function); |
---|
614 | this.writeString(string); |
---|
615 | this.writeIntArray(ints, size); |
---|
616 | readIntList(output); |
---|
617 | } catch (IOException e) { |
---|
618 | throw new CqiClientException(SERVER_IO_ERROR, e); |
---|
619 | } |
---|
620 | } |
---|
621 | |
---|
622 | /** |
---|
623 | * return the last CQP error. |
---|
624 | * |
---|
625 | * @return the last error |
---|
626 | * @throws CqiClientException Signals that the data read on the socket is |
---|
627 | * unexpected |
---|
628 | * @throws IOException Signals that an I/O exception has occurred. |
---|
629 | * @throws CqiServerError Signals that the cqi server raised an error |
---|
630 | */ |
---|
631 | private synchronized String getLastCqiError() throws CqiClientException, IOException { |
---|
632 | this.streamToServer.write(CQI_CTRL_LAST_GENERAL_ERROR); |
---|
633 | |
---|
634 | try { |
---|
635 | String ret = readString(); |
---|
636 | return ret; |
---|
637 | } catch (CqiClientException e) { |
---|
638 | return "getLastCQiError: " + e; |
---|
639 | } |
---|
640 | } |
---|
641 | |
---|
642 | /** |
---|
643 | * return the last CQP error. |
---|
644 | * |
---|
645 | * @return the last error |
---|
646 | * @throws CqiClientException Signals that the data read on the socket is |
---|
647 | * unexpected |
---|
648 | * @throws IOException Signals that an I/O exception has occurred. |
---|
649 | * @throws CqiServerError Signals that the cqi server raised an error |
---|
650 | */ |
---|
651 | private synchronized String getLastCQPError() throws CqiClientException, IOException { |
---|
652 | |
---|
653 | this.streamToServer.write(CQI_CTRL_LAST_CQP_ERROR); |
---|
654 | |
---|
655 | try { |
---|
656 | String ret = readString(); |
---|
657 | return ret; |
---|
658 | } catch (CqiClientException e) { |
---|
659 | return "getLastCQPError: " + e; |
---|
660 | } |
---|
661 | } |
---|
662 | |
---|
663 | /** |
---|
664 | * Gives the corpus charset. |
---|
665 | * |
---|
666 | * @param corpus the corpus |
---|
667 | * @return the name of the charset |
---|
668 | * @throws CqiClientException Signals that the data read on the socket is |
---|
669 | * unexpected |
---|
670 | * @throws IOException Signals that an I/O exception has occurred. |
---|
671 | * @throws CqiServerError Signals that the cqi server raised an error |
---|
672 | */ |
---|
673 | public synchronized String corpusCharset(String corpus) |
---|
674 | throws CqiClientException, IOException { |
---|
675 | return genericStringToString(corpus, CQI_CORPUS_CHARSET); |
---|
676 | } |
---|
677 | |
---|
678 | /** |
---|
679 | * Gives the corpus full name. |
---|
680 | * |
---|
681 | * @param corpus the corpus |
---|
682 | * @return the full name |
---|
683 | * @throws CqiClientException Signals that the data read on the socket is |
---|
684 | * unexpected |
---|
685 | * @throws IOException Signals that an I/O exception has occurred. |
---|
686 | * @throws CqiServerError Signals that the cqi server raised an error |
---|
687 | */ |
---|
688 | public synchronized String corpusFullName(String corpus) |
---|
689 | throws CqiClientException, IOException { |
---|
690 | return genericStringToString(corpus, CQI_CORPUS_FULL_NAME); |
---|
691 | } |
---|
692 | |
---|
693 | /** |
---|
694 | * Converts positions to their value given an attribute. |
---|
695 | * |
---|
696 | * @param attribute the attribute |
---|
697 | * @param cpos the cpos |
---|
698 | * @return the values |
---|
699 | * @throws CqiClientException |
---|
700 | */ |
---|
701 | synchronized String[] cpos2Str(String attribute, int fromPosition, int toPosition, Charset charset) |
---|
702 | throws CqiClientException { |
---|
703 | return genericStringXIntArraytoStringArray(attribute, fromPosition, toPosition, |
---|
704 | CQI_CL_CPOS2STR, charset); |
---|
705 | } |
---|
706 | |
---|
707 | /** |
---|
708 | * Computes for each position of an array the Id of the enclosing structural |
---|
709 | * attribute. |
---|
710 | * |
---|
711 | * @param attribute the attribute |
---|
712 | * @param cpos the positions |
---|
713 | * @return the IDs |
---|
714 | * @throws CqiClientException |
---|
715 | */ |
---|
716 | synchronized void cpos2Struc(String attribute, int[] cpos, int[] output, int size) |
---|
717 | throws CqiClientException { |
---|
718 | genericStringXIntArraytoIntArray(attribute, cpos, |
---|
719 | CQI_CL_CPOS2STRUC, output, size); |
---|
720 | } |
---|
721 | |
---|
722 | /** |
---|
723 | * Computes for each position of an array the position of the left boundary |
---|
724 | * of the enclosing structural attribute. |
---|
725 | * |
---|
726 | * @param attribute the attribute |
---|
727 | * @param cpos the cpos |
---|
728 | * @return the positions of the left boundaries |
---|
729 | * @throws CqiClientException |
---|
730 | */ |
---|
731 | synchronized void cpos2LBound(String attribute, int[] cpos, int[] output, int size) |
---|
732 | throws CqiClientException { |
---|
733 | genericStringXIntArraytoIntArray(attribute, cpos, CQI_CL_CPOS2LBOUND, output, size); |
---|
734 | } |
---|
735 | |
---|
736 | /** |
---|
737 | * Computes for each position of an array the position of the right boundary |
---|
738 | * of the enclosing structural attribute. |
---|
739 | * |
---|
740 | * @param attribute the attribute |
---|
741 | * @param cpos the cpos |
---|
742 | * @return the positions of the right boundaries |
---|
743 | * @throws CqiClientException |
---|
744 | */ |
---|
745 | synchronized void cpos2RBound(String attribute, int[] cpos, int[] output, int size) |
---|
746 | throws CqiClientException { |
---|
747 | genericStringXIntArraytoIntArray(attribute, cpos, CQI_CL_CPOS2RBOUND, output, size); |
---|
748 | } |
---|
749 | |
---|
750 | /** |
---|
751 | * Retrieves annotated string values of structure regions in <strucs>; "" if |
---|
752 | * out of range. |
---|
753 | * |
---|
754 | * @param attribute the attribute |
---|
755 | * @param strucs the strucs |
---|
756 | * @return the string[] |
---|
757 | * @throws CqiClientException |
---|
758 | */ |
---|
759 | synchronized String[] struc2Str(String attribute, int[] strucs, Charset charset) |
---|
760 | throws CqiClientException { |
---|
761 | return genericStringXIntArraytoStringArray(attribute, strucs, |
---|
762 | CQI_CL_STRUC2STR, charset); |
---|
763 | } |
---|
764 | |
---|
765 | /** |
---|
766 | * Runs a CQP query. |
---|
767 | * |
---|
768 | * @param corpus the corpus |
---|
769 | * @param subcorpus the subcorpus |
---|
770 | * @param query the query |
---|
771 | * @param charset the charset |
---|
772 | * @throws CqiClientException |
---|
773 | */ |
---|
774 | private synchronized void cqpQuery(String corpus, String subcorpus, |
---|
775 | String query, Charset charset) throws CqiClientException { |
---|
776 | try { |
---|
777 | this.streamToServer.write(CQI_CQP_QUERY); |
---|
778 | this.writeString(corpus); |
---|
779 | this.writeString(subcorpus); |
---|
780 | this.writeString(query, charset); |
---|
781 | this.readHeaderFromServer(); |
---|
782 | } catch (IOException e) { |
---|
783 | throw new CqiClientException(SERVER_IO_ERROR, e); |
---|
784 | } |
---|
785 | |
---|
786 | } |
---|
787 | |
---|
788 | /** |
---|
789 | * Runs a CQP query. |
---|
790 | * |
---|
791 | * @param corpus the corpus |
---|
792 | * @param query the query |
---|
793 | * @param contextStructuralAttribute context structural attribute |
---|
794 | * @param metadataStructuralAttributes metadata structural attributes |
---|
795 | * @throws CqiClientException |
---|
796 | */ |
---|
797 | public synchronized CqiResult query(String corpus, String query, String contextStructuralAttribute, String[] metadataStructuralAttributes) throws CqiClientException { |
---|
798 | String queryName = String.format("Q%d", System.currentTimeMillis()); |
---|
799 | String subcorpus = String.format("%s:%s", corpus, queryName); |
---|
800 | Charset charset; |
---|
801 | try { |
---|
802 | charset = Charset.forName(corpusCharset(corpus)); |
---|
803 | } catch (IOException e) { |
---|
804 | throw new CqiClientException(SERVER_IO_ERROR, e); |
---|
805 | } |
---|
806 | cqpQuery(corpus, queryName, query, charset); |
---|
807 | return new CqiResult(this, corpus, subcorpus, charset, subCorpusSize(subcorpus), contextStructuralAttribute, metadataStructuralAttributes); |
---|
808 | } |
---|
809 | |
---|
810 | public synchronized CqiResult query(String corpus, String query, String contextStructuralAttribute) throws CqiClientException { |
---|
811 | return query(corpus, query, contextStructuralAttribute, null); |
---|
812 | } |
---|
813 | |
---|
814 | /** |
---|
815 | * Gives the size of a subcorpus . |
---|
816 | * |
---|
817 | * @param subcorpus the subcorpus |
---|
818 | * |
---|
819 | * @return the size |
---|
820 | * |
---|
821 | * @throws CqiClientException |
---|
822 | */ |
---|
823 | private synchronized int subCorpusSize(String subcorpus) throws |
---|
824 | CqiClientException { |
---|
825 | try { |
---|
826 | this.streamToServer.write(CQI_CQP_SUBCORPUS_SIZE); |
---|
827 | this.writeString(subcorpus); |
---|
828 | return this.readInt(); |
---|
829 | } catch (IOException e) { |
---|
830 | throw new CqiClientException(SERVER_IO_ERROR, e); |
---|
831 | } |
---|
832 | } |
---|
833 | |
---|
834 | /** |
---|
835 | * Dumps the values of <field> for match ranges <first> .. <last> in |
---|
836 | * <subcorpus>. <field> is one of the CQI_CONST_FIELD_* constants. |
---|
837 | * |
---|
838 | * @param subcorpus the subcorpus |
---|
839 | * @param field the field |
---|
840 | * @param first the first |
---|
841 | * @param last the last |
---|
842 | * |
---|
843 | * @return the values |
---|
844 | * |
---|
845 | * @throws CqiClientException |
---|
846 | */ |
---|
847 | synchronized void dumpSubCorpus(String subcorpus, byte field, |
---|
848 | int first, int last, int[] output) throws CqiClientException { |
---|
849 | try { |
---|
850 | this.streamToServer.write(CQI_CQP_DUMP_SUBCORPUS); |
---|
851 | this.writeString(subcorpus); |
---|
852 | this.streamToServer.writeByte(field); |
---|
853 | this.streamToServer.writeInt(first); |
---|
854 | this.streamToServer.writeInt(last); |
---|
855 | this.readIntList(output); |
---|
856 | } catch (IOException e) { |
---|
857 | throw new CqiClientException(SERVER_IO_ERROR, e); |
---|
858 | } |
---|
859 | } |
---|
860 | |
---|
861 | /** |
---|
862 | * Drops a subcorpus. |
---|
863 | * |
---|
864 | * @param subcorpus the subcorpus |
---|
865 | * |
---|
866 | * @throws CqiClientException |
---|
867 | */ |
---|
868 | synchronized void dropSubCorpus(String subcorpus) throws |
---|
869 | CqiClientException { |
---|
870 | try { |
---|
871 | this.streamToServer.write(CQI_CQP_DROP_SUBCORPUS); |
---|
872 | this.writeString(subcorpus); |
---|
873 | this.readHeaderFromServer(); |
---|
874 | } catch (IOException e) { |
---|
875 | throw new CqiClientException(SERVER_IO_ERROR, e); |
---|
876 | } |
---|
877 | } |
---|
878 | } |
---|