Changeset 6851 for SRUServer

Timestamp:

11/26/15 12:45:26 (8 years ago)

Author:

Oliver Schonefeld

Message:

• add convenience method to SRURequest to automatically cast query to a supplied type

Location:

SRUServer/trunk/src/main/java/eu/clarin/sru/server

Files:

• SRURequest.java (modified) (1 diff)
• SRURequestImpl.java (modified) (1 diff)

SRUServer/trunk/src/main/java/eu/clarin/sru/server/SRURequest.java

@@ -105 +105 @@
      * <em>searchRetrieve</em> requests.
      *
-     * @return the parsed query as an AST or <code>null</code> if not a
-     *         <em>searchRetrieve</em> request
+     * @return an {@link SRUQuery} instance tailored for the used queryType or
+     *         <code>null</code> if not a <em>searchRetrieve</em> request
      */
     public SRUQuery<?> getQuery();
+
+
+    /**
+     * Get the <em>query</em> parameter of this request. Only available for
+     * <em>searchRetrieve</em> requests. This convenience method tried to cast
+     * the query object to the supplied type.
+     *
+     * @param type
+     *            Class representing the Java data type to convert the query to.
+     * @return an {@link SRUQuery} instance tailored for the used queryType or
+     *         <code>null</code> if not a <em>searchRetrieve</em> request
+     * @throws ClassCastException
+     *             if conversion is not supported, type is <code>null</code> or
+     *             another error occurs
+     */
+    public <T extends SRUQuery<?>> T getQuery(Class<T> type);
 
 

SRUServer/trunk/src/main/java/eu/clarin/sru/server/SRURequestImpl.java

@@ -815 +815 @@
 
     @Override
+    public <T extends SRUQuery<?>> T getQuery(Class<T> type) {
+        if (type == null) {
+            throw new ClassCastException("type == null");
+        }
+        // cast() is null-safe
+        return type.cast(query);
+    }
+
+
+    @Override
     public boolean isQueryType(String queryType) {
         if ((queryType != null) && (query != null)) {