/*
* Copyright (c) 2010, 2011, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package java.util.functions;
/**
* Performs operations upon an input object which may modify that object and/or
* external state (other objects).
*
*
All block implementations are expected to:
*
* - When used for aggregate operations upon many elements blocks
* should not assume that the {@code apply} operation will be called upon
* elements in any specific order.
*
*
* @param The type of input objects to {@code apply}.
*/
public interface Block {
/**
* Performs operations upon the provided object which may modify that object
* and/or external state.
*
* @param t an input object
*/
void apply(T t);
/**
* Returns a Block which performs in sequence the {@code apply} methods of
* multiple Blocks. This Block's {@code apply} method is performed followed
* by the {@code apply} method of the specified Block operation.
*
* @param second an additional Block which will be chained after this Block
* @return a Block which performs in sequence the {@code apply} method of
* this Block and the {@code apply} method of the specified Block operation
*/
> Block chain(B second) default Blocks.chain;
/**
* Returns a Block which performs in sequence the {@code apply} methods of
* multiple Blocks. This Block's {@code apply} method is performed followed
* by the {@code apply} methods of the specified Block operations.
*
* @param sequence additional Blocks which will be chained after this Block
* @return a Block which performs in sequence the {@code apply} method of
* this Block and the {@code apply} methods of the specified Block
* operations
*/
> Block chain(B... sequence) default Blocks.chain;
/**
* Returns a Block which performs in sequence the {@code apply} methods of
* multiple Blocks. This Block's {@code apply} method is performed followed
* by the {@code apply} methods of the specified Block operations.
*
* @param sequence additional Blocks which will be chained after this Block
* @return a Block which performs in sequence the {@code apply} method of
* this Block and the {@code apply} methods of the specified Block
* operations
*/
> Block chain(Iterable sequence) default Blocks.chain;
/**
* Returns a Block which repeatedly performs the {@code apply} method of
* this Block.
*
* @param count number of repetitions of the {@code apply} method to perform.
* @return a Block which repeatedly performs the {@code apply} method of
* this Block.
*/
Block repeat(int count) default Blocks.repeat;
/**
* Returns a Block which repeatedly performs the {@code apply} method of
* this Block. The repetitions are terminated when the provided predicate
* returns {@code false}. The predicate is tested before each iteration.
*
* @param count number of repetitions of the {@code apply} method to perform.
* @return a Block which repeatedly performs the {@code apply} method of
* this Block.
*/
Block repeatWhile(Predicate super T> decider) default Blocks.repeatWhile;
/**
* Returns a Block which repeatedly performs the {@code apply} method of
* this Block. The repetitions are terminated when the provided predicate
* returns {@code false}. The predicate is tested after each iteration.
*
* @param count number of repetitions of the {@code apply} method to perform.
* @return a Block which repeatedly performs the {@code apply} method of
* this Block.
*/
Block repeatUntil(Predicate super T> decider) default Blocks.repeatUntil;
}