/*
* Copyright 2011 Goldman Sachs.
*
* 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 com.gs.collections.impl.block.procedure;
import com.gs.collections.api.block.predicate.Predicate;
import com.gs.collections.api.block.procedure.Procedure;
/**
* IfProcedure allows developers to evaluate the specified procedure only when either predicate returns true.
* If the result of evaluating the predicate is false, and the developer has specified that there
* is an elseProcedure, then the elseProcedure is evaluated.
*/
public final class IfProcedure<T> implements Procedure<T>
{
private static final long serialVersionUID = 1L;
private final Predicate<? super T> predicate;
private final Procedure<? super T> procedure;
private final Procedure<? super T> elseProcedure;
public IfProcedure(
Predicate<? super T> predicate,
Procedure<? super T> procedure,
Procedure<? super T> elseProcedure)
{
this.predicate = predicate;
this.procedure = procedure;
this.elseProcedure = elseProcedure;
}
public IfProcedure(Predicate<? super T> predicate, Procedure<? super T> procedure)
{
this(predicate, procedure, null);
}
public void value(T object)
{
if (this.predicate.accept(object))
{
this.procedure.value(object);
}
else
{
if (this.elseProcedure != null)
{
this.elseProcedure.value(object);
}
}
}
@Override
public String toString()
{
return "new IfProcedure(" + this.predicate + ", " + this.procedure + ", " + this.elseProcedure + ')';
}
}