source: VirtualCollectionRegistry/trunk/VirtualCollectionRegistry/src/main/java/eu/clarin/cmdi/virtualcollectionregistry/query/RelationNode.java @ 213

package eu.clarin.cmdi.virtualcollectionregistry.query;

import org.antlr.runtime.Token;
import org.antlr.runtime.tree.CommonTree;

class RelationNode extends CommonTree implements ParseTreeNode {
        public static enum Relation { EQ, NE };
        private Relation relation;
        
        public RelationNode(Token token) {
                super(token);
                this.relation = fromType(token.getType());
        }

        public Relation getRelation() {
                return this.relation;
        }

        public void accept(ParseTreeNodeVisitor visitor) {
                visitor.visit(this);
        }

        private static Relation fromType(int type) {
                switch (type) {
                case VCRQLLexer.EQ:
                        return Relation.EQ;
                case VCRQLLexer.NE:
                        return Relation.NE;                     
                default:
                        throw new IllegalArgumentException("bad relation type: " + type);
                }
        }

} // class RelationNode