/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.openjpa.persistence.query;
/**
* Utility for converting elements to JPQL string fragments.
*
* @author Pinaki Poddar
*
*/
public class JPQLHelper {
private static final StringBuffer SINGLE_QUOTE = new StringBuffer("'");
static String toJPQL(AliasContext ctx, Object o) {
if (o == null)
return "NULL";
if (o instanceof Visitable)
return ((Visitable)o).asExpression(ctx);
if (o instanceof Class)
return ctx.getEntityName((Class)o);
if (o instanceof String)
return SINGLE_QUOTE + (String)o + SINGLE_QUOTE;
return o.toString();
}
}