| /* |
| * 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; |
| |
| public class IsEmptyExpression extends UnaryExpressionPredicate { |
| public IsEmptyExpression(Expression op) { |
| super(op, UnaryConditionalOperator.ISEMPTY, |
| UnaryConditionalOperator.ISEMPTY_NOT); |
| } |
| |
| @Override |
| public String asExpression(AliasContext ctx) { |
| return ((Visitable)_e).asExpression(ctx) + SPACE + _op; |
| } |
| } |
