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/*
* 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 org.apache.commons.collections4;
/**
* Defines a functor interface implemented by classes that do something.
*
* A Closure
represents a block of code which is executed from
* inside some block, function or iteration. It operates an input object.
*
*
* Standard implementations of common closures are provided by
* {@link ClosureUtils}. These include method invocation and for/while loops.
*
*
* @param the type that the closure acts on
* @since 1.0
*/
@FunctionalInterface
public interface Closure {
/**
* Performs an action on the specified input object.
*
* @param input the input to execute on
* @throws ClassCastException (runtime) if the input is the wrong class
* @throws IllegalArgumentException (runtime) if the input is invalid
* @throws FunctorException (runtime) if any other error occurs
*/
void execute(T input);
}
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