73 lines
2.9 KiB
Java
73 lines
2.9 KiB
Java
|
/*
|
||
|
|
* Copyright (c) 2012, 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.util.stream;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* An enum describing the known shape specializations for stream abstractions.
|
||
|
|
* Each will correspond to a specific subinterface of {@link BaseStream}
|
||
|
|
* (e.g., {@code REFERENCE} corresponds to {@code Stream}, {@code INT_VALUE}
|
||
|
|
* corresponds to {@code IntStream}). Each may also correspond to
|
||
|
|
* specializations of value-handling abstractions such as {@code Spliterator},
|
||
|
|
* {@code Consumer}, etc.
|
||
|
|
*
|
||
|
|
* @apiNote
|
||
|
|
* This enum is used by implementations to determine compatibility between
|
||
|
|
* streams and operations (i.e., if the output shape of a stream is compatible
|
||
|
|
* with the input shape of the next operation).
|
||
|
|
*
|
||
|
|
* <p>Some APIs require you to specify both a generic type and a stream shape
|
||
|
|
* for input or output elements, such as {@link TerminalOp} which has both
|
||
|
|
* generic type parameters for its input types, and a getter for the
|
||
|
|
* input shape. When representing primitive streams in this way, the
|
||
|
|
* generic type parameter should correspond to the wrapper type for that
|
||
|
|
* primitive type.
|
||
|
|
*
|
||
|
|
* @since 1.8
|
||
|
|
* @hide Visible for CTS testing only (OpenJDK8 tests).
|
||
|
|
*/
|
||
|
|
// Android-changed: Made public for CTS tests only.
|
||
|
|
public enum StreamShape {
|
||
|
|
/**
|
||
|
|
* The shape specialization corresponding to {@code Stream} and elements
|
||
|
|
* that are object references.
|
||
|
|
*/
|
||
|
|
REFERENCE,
|
||
|
|
/**
|
||
|
|
* The shape specialization corresponding to {@code IntStream} and elements
|
||
|
|
* that are {@code int} values.
|
||
|
|
*/
|
||
|
|
INT_VALUE,
|
||
|
|
/**
|
||
|
|
* The shape specialization corresponding to {@code LongStream} and elements
|
||
|
|
* that are {@code long} values.
|
||
|
|
*/
|
||
|
|
LONG_VALUE,
|
||
|
|
/**
|
||
|
|
* The shape specialization corresponding to {@code DoubleStream} and
|
||
|
|
* elements that are {@code double} values.
|
||
|
|
*/
|
||
|
|
DOUBLE_VALUE
|
||
|
|
}
|