com.feilong.lib.collection4.functors.ForClosure Maven / Gradle / Ivy
Show all versions of feilong Show documentation
/*
* 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 com.feilong.lib.collection4.functors;
import org.apache.commons.collections4.Closure;
/**
* Closure implementation that calls another closure n times, like a for loop.
*
* WARNING: from v4.1 onwards this class will not be serializable anymore
* in order to prevent potential remote code execution exploits. Please refer to
* COLLECTIONS-580
* for more details.
*
*
* @param
*
* @since 3.0
*/
public class ForClosure implements Closure{
/** The number of times to loop */
private final int iCount;
/** The closure to call */
private final Closure iClosure;
/**
* Factory method that performs validation.
*
* A null closure or zero count returns the NOPClosure.
* A count of one returns the specified closure.
*
* @param
* the type that the closure acts on
* @param count
* the number of times to execute the closure
* @param closure
* the closure to execute, not null
* @return the for closure
*/
@SuppressWarnings("unchecked")
public static Closure forClosure(final int count,final Closure closure){
if (count <= 0 || closure == null){
return NOPClosure. nopClosure();
}
if (count == 1){
return (Closure) closure;
}
return new ForClosure<>(count, closure);
}
/**
* Constructor that performs no validation.
* Use forClosure if you want that.
*
* @param count
* the number of times to execute the closure
* @param closure
* the closure to execute, not null
*/
public ForClosure(final int count, final Closure closure){
super();
iCount = count;
iClosure = closure;
}
/**
* Executes the closure count times.
*
* @param input
* the input object
*/
@Override
public void execute(final E input){
for (int i = 0; i < iCount; i++){
iClosure.execute(input);
}
}
/**
* Gets the closure.
*
* @return the closure
* @since 3.1
*/
public Closure getClosure(){
return iClosure;
}
/**
* Gets the count.
*
* @return the count
* @since 3.1
*/
public int getCount(){
return iCount;
}
}