diff -r 3e6fe94f02a8 -r e68aa1253821 jdk/src/share/classes/java/util/stream/StreamBuilder.java --- a/jdk/src/share/classes/java/util/stream/StreamBuilder.java Thu Jul 25 20:10:48 2013 +0530 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,265 +0,0 @@ -/* - * Copyright (c) 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; - -import java.util.function.Consumer; -import java.util.function.DoubleConsumer; -import java.util.function.IntConsumer; -import java.util.function.LongConsumer; - -/** - * A mutable builder for a {@code Stream}. This allows the creation of a - * {@code Stream} by generating elements individually and adding them to the - * {@code StreamBuilder} (without the copying overhead that comes from using - * an {@code ArrayList} as a temporary buffer.) - * - *

A {@code StreamBuilder} has a lifecycle, where it starts in a building - * phase, during which elements can be added, and then transitions to a built - * phase, after which elements may not be added. The built phase begins - * when the {@link #build()} method is called, which creates an ordered - * {@code Stream} whose elements are the elements that were added to the stream - * builder, in the order they were added. - * - *

Primitive specializations of {@code StreamBuilder} are provided - * for {@link OfInt int}, {@link OfLong long}, and {@link OfDouble double} - * values. - * - * @param the type of stream elements - * @see Stream#builder() - * @since 1.8 - */ -public interface StreamBuilder extends Consumer { - - /** - * Adds an element to the stream being built. - * - * @throws IllegalStateException if the builder has already transitioned to - * the built state - */ - @Override - void accept(T t); - - /** - * Adds an element to the stream being built. - * - * @implSpec - * The default implementation behaves as if: - *

{@code
-     *     accept(t)
-     *     return this;
-     * }
- * - * @param t the element to add - * @return {@code this} builder - * @throws IllegalStateException if the builder has already transitioned to - * the built state - */ - default StreamBuilder add(T t) { - accept(t); - return this; - } - - /** - * Builds the stream, transitioning this builder to the built state. - * An {@code IllegalStateException} is thrown if there are further attempts - * to operate on the builder after it has entered the built state. - * - * @return the built stream - * @throws IllegalStateException if the builder has already transitioned to - * the built state - */ - Stream build(); - - /** - * A mutable builder for an {@code IntStream}. - * - *

A stream builder has a lifecycle, where it starts in a building - * phase, during which elements can be added, and then transitions to a - * built phase, after which elements may not be added. The built phase - * begins when the {@link #build()} method is called, which creates an - * ordered stream whose elements are the elements that were added to the - * stream builder, in the order they were added. - * - * @see IntStream#builder() - * @since 1.8 - */ - interface OfInt extends IntConsumer { - - /** - * Adds an element to the stream being built. - * - * @throws IllegalStateException if the builder has already transitioned - * to the built state - */ - @Override - void accept(int t); - - /** - * Adds an element to the stream being built. - * - * @implSpec - * The default implementation behaves as if: - *

{@code
-         *     accept(t)
-         *     return this;
-         * }
- * - * @param t the element to add - * @return {@code this} builder - * @throws IllegalStateException if the builder has already transitioned - * to the built state - */ - default StreamBuilder.OfInt add(int t) { - accept(t); - return this; - } - - /** - * Builds the stream, transitioning this builder to the built state. - * An {@code IllegalStateException} is thrown if there are further - * attempts to operate on the builder after it has entered the built - * state. - * - * @return the built stream - * @throws IllegalStateException if the builder has already transitioned to - * the built state - */ - IntStream build(); - } - - /** - * A mutable builder for a {@code LongStream}. - * - *

A stream builder has a lifecycle, where it starts in a building - * phase, during which elements can be added, and then transitions to a - * built phase, after which elements may not be added. The built phase - * begins when the {@link #build()} method is called, which creates an - * ordered stream whose elements are the elements that were added to the - * stream builder, in the order they were added. - * - * @see LongStream#builder() - * @since 1.8 - */ - interface OfLong extends LongConsumer { - - /** - * Adds an element to the stream being built. - * - * @throws IllegalStateException if the builder has already transitioned - * to the built state - */ - @Override - void accept(long t); - - /** - * Adds an element to the stream being built. - * - * @implSpec - * The default implementation behaves as if: - *

{@code
-         *     accept(t)
-         *     return this;
-         * }
- * - * @param t the element to add - * @return {@code this} builder - * @throws IllegalStateException if the builder has already transitioned - * to the built state - */ - default StreamBuilder.OfLong add(long t) { - accept(t); - return this; - } - - /** - * Builds the stream, transitioning this builder to the built state. - * An {@code IllegalStateException} is thrown if there are further - * attempts to operate on the builder after it has entered the built - * state. - * - * @return the built stream - * @throws IllegalStateException if the builder has already transitioned - * to the built state - */ - LongStream build(); - } - - /** - * A mutable builder for a {@code DoubleStream}. - * - *

A stream builder has a lifecycle, where it starts in a building - * phase, during which elements can be added, and then transitions to a - * built phase, after which elements may not be added. The built phase - * begins when the {@link #build()} method is called, which creates an - * ordered stream whose elements are the elements that were added to the - * stream builder, in the order they were added. - * - * @see LongStream#builder() - * @since 1.8 - */ - interface OfDouble extends DoubleConsumer { - - /** - * Adds an element to the stream being built. - * - * @throws IllegalStateException if the builder has already transitioned - * to the built state - */ - @Override - void accept(double t); - - /** - * Adds an element to the stream being built. - * - * @implSpec - * The default implementation behaves as if: - *

{@code
-         *     accept(t)
-         *     return this;
-         * }
- * - * @param t the element to add - * @return {@code this} builder - * @throws IllegalStateException if the builder has already transitioned - * to the built state - */ - default StreamBuilder.OfDouble add(double t) { - accept(t); - return this; - } - - /** - * Builds the stream, transitioning this builder to the built state. - * An {@code IllegalStateException} is thrown if there are further - * attempts to operate on the builder after it has entered the built - * state. - * - * @return the built stream - * @throws IllegalStateException if the builder has already transitioned - * to the built state - */ - DoubleStream build(); - } -}