/**
* 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.Closure;
import org.valkyriercp.rules.constraint.Constraint;
/**
* A factory for easing the construction and composition of closure (blocks of
* executable code).
*
* @author Keith Donald
*/
public class Closures extends AlgorithmsAccessor {
private static Closures INSTANCE = new Closures();
public Closures() {
}
public static Closures instance() {
return INSTANCE;
}
public static void load(Closures sharedInstance) {
Assert.notNull(sharedInstance, "The global closures factory cannot be null");
INSTANCE = sharedInstance;
}
public Closure chain(Closure firstFunction, Closure secondFunction) {
return new ClosureChain(firstFunction, secondFunction);
}
public Closure chain(Closure[] functionsToChain) {
return new ClosureChain(functionsToChain);
}
public Closure ifTrue(Constraint constraint, Closure closure) {
return new IfBlock(constraint, closure);
}
}