org.hibernate.hql.internal.classic.ParserHelper.java Source code

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Here is the source code for org.hibernate.hql.internal.classic.ParserHelper.java

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/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * License: GNU Lesser General Public License (LGPL), version 2.1 or later.
 * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
 */
package org.hibernate.hql.internal.classic;

import java.util.BitSet;
import java.util.StringTokenizer;

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

public final class ParserHelper {

    public static final String HQL_VARIABLE_PREFIX = ":";

    public static final String HQL_SEPARATORS = " \n\r\f\t,()=<>&|+-=/*'^![]#~\\";
    public static final BitSet HQL_SEPARATORS_BITSET = new BitSet();

    static {
        for (int i = 0; i < HQL_SEPARATORS.length(); i++) {
            HQL_SEPARATORS_BITSET.set(HQL_SEPARATORS.charAt(i));
        }
    }

    //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.contains(str);
    }

    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);
    }
}