/* * Copyright (C) 2007 The Guava Authors * * 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 org.whispersystems.libaxolotl.util.guava; /** * Determines an output value based on an input value. * *
See the Guava User Guide article on the use of {@code
* Function}.
*
* @author Kevin Bourrillion
* @since 2.0 (imported from Google Collections Library)
*/
public interface Function Most implementations will have no reason to override the behavior of {@link Object#equals}.
* However, an implementation may also choose to return {@code true} whenever {@code object} is a
* {@link Function} that it considers interchangeable with this one. "Interchangeable"
* typically means that {@code Objects.equal(this.apply(f), that.apply(f))} is true for all
* {@code f} of type {@code F}. Note that a {@code false} result from this method does not imply
* that the functions are known not to be interchangeable.
*/
@Override
boolean equals(Object object);
}
*
*
* @throws NullPointerException if {@code input} is null and this function does not accept null
* arguments
*/
T apply(F input);
/**
* Indicates whether another object is equal to this function.
*
*