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/* 
 Copyright (C) GridGain Systems. All Rights Reserved.
 
 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.
 */

/*  _________        _____ __________________        _____
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 *  \____/   /_/     /_/   \_,__/   \____/   \__,_/  /_/   /_/ /_/
 */

package org.gridgain.client;

/**
 * Defines predicate construct. Predicate like closure is a first-class function
 * that is defined with (or closed over) its free variables that are bound to the closure
 * scope at execution.
 * Thread Safety
 * Note that this interface does not impose or assume any specific thread-safety by its
 * implementations. Each implementation can elect what type of thread-safety it provides,
 * if any.
 * @param  Type of the free variable, i.e. the element the predicate is called on.
 */
public interface GridClientPredicate {
    /**
     * Predicate body.
     *
     * @param e Bound free variable, i.e. the element the closure is called or closed on.
     * @return Return value.
     */
    public boolean apply(E1 e);
}