/*
* 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;
/**
* A expression that holds an array of Expressions. Used as operand for
* CONCAT(e1,e2,e3,...), for example. Different than {@link ArrayExpression}
* which represents a single expression with array of values.
*
* @author Pinaki Poddar
*
*/
public class VarArgsExpression extends ExpressionImpl {
private final Expression[] _values;
public VarArgsExpression(Expression[] values) {
_values = values;
}
@Override
public String asExpression(AliasContext ctx) {
StringBuilder tmp = new StringBuilder();
for (int i = 0; i < _values.length; i++) {
Visitable v = (Visitable)_values[i];
tmp.append(v.asExpression(ctx))
.append(i == _values.length-1 ? "" : ", ");
}
return tmp.toString();
}
@Override
public String asProjection(AliasContext ctx) {
return asExpression(ctx);
}
}