/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* JBoss, Home of Professional Open Source
* Copyright 2013 Red Hat Inc. and/or its affiliates and other contributors
* as indicated by the @authors tag. All rights reserved.
* See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License, v. 2.1.
* This program is distributed in the hope that it will be useful, but WITHOUT A
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public License,
* v.2.1 along with this distribution; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
package org.hibernate.hql.ast.spi;
import org.antlr.runtime.RecognitionException;
import org.antlr.runtime.TokenStream;
import org.antlr.runtime.tree.CommonTree;
import org.antlr.runtime.tree.CommonTreeNodeStream;
import org.hibernate.hql.ast.origin.hql.parse.HQLParser;
import org.hibernate.hql.ast.origin.hql.resolve.GeneratedHQLResolver;
/**
* An {@link AstProcessor} which resolves the elements a given source query into an output query, by invoking
* {@link QueryResolverDelegate} while traversing the given query tree.
* </p>
* Input: Parse tree as created by {@link HQLParser}</br>
* Output: Normalized parse tree
*
* @author Gunnar Morling
*/
public class QueryResolverProcessor implements AstProcessor {
private final QueryResolverDelegate delegate;
public QueryResolverProcessor(QueryResolverDelegate delegate) {
this.delegate = delegate;
}
@Override
public CommonTree process(TokenStream tokens, CommonTree tree) throws RecognitionException {
CommonTreeNodeStream treeNodeStream = new CommonTreeNodeStream( tree );
treeNodeStream.setTokenStream( tokens );
return (CommonTree) new GeneratedHQLResolver( treeNodeStream, delegate ).statement().getTree();
}
}