/**
* 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.ambari.server.api.predicate.expressions;
import org.apache.ambari.server.api.predicate.InvalidQueryException;
import org.apache.ambari.server.api.predicate.operators.RelationalOperator;
import org.apache.ambari.server.controller.spi.Predicate;
/**
* Relational Expression.
* Consists of a property name for the left operand, a relational operator
* and a value as the right operand.
*/
public class RelationalExpression extends AbstractExpression<String> {
/**
* Constructor.
*
* @param op relational operator
*/
public RelationalExpression(RelationalOperator op) {
super(op);
}
@Override
public Predicate toPredicate() throws InvalidQueryException {
return ((RelationalOperator) getOperator()).
toPredicate(getLeftOperand(), getRightOperand());
}
@Override
public String toString() {
return "RelationalExpression{ property='" + getLeftOperand() + "\', value='"
+ getRightOperand() + "\', op=" + getOperator() + " }";
}
}