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A library jar that provides APIs for Applications written for the Google Android Platform.
/*
* Copyright (c) 2003, 2013, 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.lang;
import java.util.Iterator;
import java.util.Objects;
import java.util.Spliterator;
import java.util.Spliterators;
import java.util.function.Consumer;
// Android-changed: href changed in javadoc for redirection.
/**
* Implementing this interface allows an object to be the target of
* the "for-each loop" statement. See
*
* For-each Loop
*
*
* @param the type of elements returned by the iterator
*
* @since 1.5
* @jls 14.14.2 The enhanced for statement
*/
public interface Iterable {
/**
* Returns an iterator over elements of type {@code T}.
*
* @return an Iterator.
*/
Iterator iterator();
/**
* Performs the given action for each element of the {@code Iterable}
* until all elements have been processed or the action throws an
* exception. Unless otherwise specified by the implementing class,
* actions are performed in the order of iteration (if an iteration order
* is specified). Exceptions thrown by the action are relayed to the
* caller.
*
* @implSpec
* The default implementation behaves as if:
*
{@code
* for (T t : this)
* action.accept(t);
* }
*
* @param action The action to be performed for each element
* @throws NullPointerException if the specified action is null
* @since 1.8
*/
default void forEach(Consumer action) {
Objects.requireNonNull(action);
for (T t : this) {
action.accept(t);
}
}
/**
* Creates a {@link Spliterator} over the elements described by this
* {@code Iterable}.
*
* @implSpec
* The default implementation creates an
* early-binding
* spliterator from the iterable's {@code Iterator}. The spliterator
* inherits the fail-fast properties of the iterable's iterator.
*
* @implNote
* The default implementation should usually be overridden. The
* spliterator returned by the default implementation has poor splitting
* capabilities, is unsized, and does not report any spliterator
* characteristics. Implementing classes can nearly always provide a
* better implementation.
*
* @return a {@code Spliterator} over the elements described by this
* {@code Iterable}.
* @since 1.8
*/
default Spliterator spliterator() {
return Spliterators.spliteratorUnknownSize(iterator(), 0);
}
}