org.apache.openjpa.persistence.query.UnaryConditionalOperator Maven / Gradle / Ivy
/*
* 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;
/**
* Enumeration of operator that operates on a single expression to generate
* a predicate.
*
* @see UnaryOperatorExpression
*
* @author Pinaki Poddar
*
*/
public enum UnaryConditionalOperator {
EXISTS("EXISTS"),
EXISTS_NOT("NOT EXISTS"),
ISEMPTY("IS EMPTY"),
ISEMPTY_NOT("IS NOT EMPTY"),
ISNULL("IS NULL"),
ISNULL_NOT("IS NOT NULL"),
SOME("SOME");
private final String _symbol;
UnaryConditionalOperator(String symbol) {
_symbol = symbol;
}
@Override
public String toString() {
return _symbol;
}
}