/*
* 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;
}
}
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