org.hibernate.sqm.parser.hql.internal.HqlParseTreeBuilder.java Source code

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Here is the source code for org.hibernate.sqm.parser.hql.internal.HqlParseTreeBuilder.java

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/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * License: Apache License, Version 2.0
 * See the LICENSE file in the root directory or visit http://www.apache.org/licenses/LICENSE-2.0
 */
package org.hibernate.sqm.parser.hql.internal;

import org.hibernate.sqm.parser.hql.internal.antlr.HqlLexer;
import org.hibernate.sqm.parser.hql.internal.antlr.HqlParser;

import org.jboss.logging.Logger;

import org.antlr.v4.runtime.ANTLRInputStream;
import org.antlr.v4.runtime.CommonTokenStream;
import org.antlr.v4.runtime.Token;

/**
 * @author Steve Ebersole
 */
public class HqlParseTreeBuilder {
    private static final Logger log = Logger.getLogger(HqlParseTreeBuilder.class);

    /**
     * Singleton access
     */
    public static final HqlParseTreeBuilder INSTANCE = new HqlParseTreeBuilder();

    public HqlParser parseHql(String hql) {
        // Build the lexer
        HqlLexer hqlLexer = new HqlLexer(new ANTLRInputStream(hql));

        // Build the parser...
        final HqlParser parser = new HqlParser(new CommonTokenStream(hqlLexer)) {
            @Override
            protected void logUseOfReservedWordAsIdentifier(Token token) {
                log.debugf("Encountered use of reserved word as identifier : " + token.getText());
            }
        };

        HqlParseTreePrinter.logParseTree(parser);

        return parser;
    }
}