/**
* Copyright (C) 2015 Valkyrie RCP
*
* Licensed 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.valkyriercp.rules.constraint;
/**
* Type-safe enums for various conditional or logical operators.
*
* @author Keith Donald
*/
public abstract class LogicalOperator extends Operator {
/**
* The <code>AND</code> operator
*/
public static final LogicalOperator AND = new LogicalOperator("and", "&&") {
public CompoundConstraint createConstraint() {
return new And();
}
};
/**
* The <code>OR</code> operator
*/
public static final LogicalOperator OR = new LogicalOperator("or", "||") {
public CompoundConstraint createConstraint() {
return new Or();
}
};
/**
* The <code>XOR</code> operator
*/
public static final LogicalOperator XOR = new LogicalOperator("xor", "^") {
public CompoundConstraint createConstraint() {
return new XOr();
}
};
private LogicalOperator(String code, String symbol) {
super(code, symbol);
}
public CompoundConstraint createConstraint() {
throw new UnsupportedOperationException();
}
}