parserhelper.java

一个Java持久层类库

//$Id: ParserHelper.java 6879 2005-05-23 19:54:13Z oneovthafew $
package org.hibernate.hql.classic;

import org.hibernate.QueryException;
import org.hibernate.util.StringHelper;

import java.util.StringTokenizer;

public final class ParserHelper {

	public static final String HQL_VARIABLE_PREFIX = ":";

	public static final String HQL_SEPARATORS = " \n\r\f\t,()=<>&|+-=/*'^![]#~\\";
	//NOTICE: no " or . since they are part of (compound) identifiers
	public static final String PATH_SEPARATORS = ".";

	public static boolean isWhitespace(String str) {
		return StringHelper.WHITESPACE.indexOf( str ) > -1;
	}

	private ParserHelper() {
		//cannot instantiate
	}

	public static void parse(Parser p, String text, String seperators, QueryTranslatorImpl q) throws QueryException {
		StringTokenizer tokens = new StringTokenizer( text, seperators, true );
		p.start( q );
		while ( tokens.hasMoreElements() ) p.token( tokens.nextToken(), q );
		p.end( q );
	}

}