/**
* 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.closure.support;
import org.springframework.util.Assert;
import org.valkyriercp.rules.closure.BinaryClosure;
/**
* Conveneince support class for binary closures. Overrides call(argument) to
* treat the passed argument as an array with two elements.
*
* @author Keith Donald
*/
public abstract class AbstractBinaryClosure extends AbstractClosure implements
BinaryClosure {
public Object call(Object argument) {
if (argument == null) {
argument = new Object[0];
}
Assert.isTrue(argument.getClass().isArray(),
"Binary argument must be an array");
Object[] arguments = (Object[])argument;
Assert.isTrue(arguments.length == 2,
"Binary argument must contain 2 elements");
return call(arguments[0], arguments[1]);
}
}