org.hibernate.hql.ast.HqlLexer Maven / Gradle / Ivy
/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2008, Red Hat Middleware LLC or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Middleware LLC.
*
* 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, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY 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
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*
*/
package org.hibernate.hql.ast;
import java.io.InputStream;
import java.io.Reader;
import antlr.Token;
import org.hibernate.QueryException;
import org.hibernate.hql.antlr.HqlBaseLexer;
/**
* Custom lexer for the HQL grammar. Extends the base lexer generated by ANTLR
* in order to keep the grammar source file clean.
*/
class HqlLexer extends HqlBaseLexer {
/**
* A logger for this class. *
*/
private boolean possibleID = false;
public HqlLexer(InputStream in) {
super( in );
}
public HqlLexer(Reader in) {
super(in);
}
public void setTokenObjectClass(String cl) {
// Ignore the token class name parameter, and use a specific token class.
super.setTokenObjectClass( HqlToken.class.getName() );
}
protected void setPossibleID(boolean possibleID) {
this.possibleID = possibleID;
}
protected Token makeToken(int i) {
HqlToken token = ( HqlToken ) super.makeToken( i );
token.setPossibleID( possibleID );
possibleID = false;
return token;
}
public int testLiteralsTable(int i) {
int ttype = super.testLiteralsTable( i );
return ttype;
}
public void panic() {
//overriden to avoid System.exit
panic("CharScanner: panic");
}
public void panic(String s) {
//overriden to avoid System.exit
throw new QueryException(s);
}
}