8001634: Initial set of functional interface types

Add the core functional interfaces used by the JSR335 libraries.

Reviewed-by: dholmes, briangoetz, darcy

jdk/make/docs/CORE_PKGS.gmk

@@ -131,6 +131,7 @@ CORE_PKGS =                                      \
   java.util.concurrent                           \
   java.util.concurrent.atomic                    \
   java.util.concurrent.locks                     \
+  java.util.function                             \
   java.util.jar                                  \
   java.util.logging                              \
   java.util.prefs                                \

jdk/make/java/java/Makefile

@@ -37,6 +37,8 @@ SUBDIRS_MAKEFLAGS += JAVAC_WARNINGS_FATAL=true
 JAVAC_MAX_WARNINGS=true
 include $(BUILDDIR)/common/Defs.gmk
 
+AUTO_FILES_JAVA_DIRS = java/util/function
+
 # windows compiler flags
 ifeq ($(PLATFORM),windows)
   OTHER_CFLAGS =

jdk/src/share/classes/java/util/function/BinaryOperator.java

@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2010, 2012 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.function;
+
+/**
+ * An operation upon two operands yielding a result. The operands and the result
+ * are all of the same type.
+ *
+ * @param <T> the type of operands to {@code operate} and of the result
+ *
+ * @since 1.8
+ */
+public interface BinaryOperator<T> {
+
+    /**
+     * Returns the result of the operation upon the operands.
+     * The operands are named {@code left} and {@code right} for operations
+     * where the order of operands matters.
+     *
+     * @param left the left operand
+     * @param right the right operand
+     * @return the result of the operation
+     */
+    public T operate(T left, T right);
+}

jdk/src/share/classes/java/util/function/Block.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2010, 2012 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.function;
+
+/**
+ * An operation upon an input object. The operation may modify that object or
+ * external state (other objects).
+ *
+ * @param <T> The type of input objects to {@code accept}
+ *
+ * @since 1.8
+ */
+public interface Block<T> {
+
+    /**
+     * Use the input object in operations which may modify that object or
+     * external state (other objects).
+     *
+     * @param t the input object
+     */
+    public void accept(T t);
+}

jdk/src/share/classes/java/util/function/DoubleBinaryOperator.java

@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2012, 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.function;
+
+/**
+ * An operation on two {@code double} operands yielding a {@code double} result.
+ *
+ * @since 1.8
+ */
+public interface DoubleBinaryOperator /* extends BinaryOperator<Double> */ {
+//
+//    @Override
+//    public default Double operate(Double left, Double right) { return operateAsDouble((double) left, (double) right); }
+
+    /**
+     * Returns the {@code double} result of the operation upon the
+     * {@code double} operands. The parameters are named {@code left} and
+     * {@code right} for operations where the order of parameters matters.
+     *
+     * @param left the left operand value
+     * @param right  the right operand value
+     * @return the result of the operation
+     */
+    public double operateAsDouble(double left, double right);
+}

jdk/src/share/classes/java/util/function/DoubleBlock.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2010, 2012 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.function;
+
+/**
+ * An operation upon a {@code double} input value. The operation may modify
+ * external state.
+ *
+ * <p/>This is the primitive type specialization of {@link Block} for
+ * {@code double} and also may be used as a {@code Block<Double>}.
+ *
+ * @since 1.8
+ */
+public interface DoubleBlock {
+
+    /**
+     * Use the {@code double} input value in an operation which may modify
+     * external state.
+     *
+     * @param t the input value
+     */
+    public void accept(double t);
+}

jdk/src/share/classes/java/util/function/DoubleFunction.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2012, 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.function;
+
+/**
+ * Apply a function to the input object yielding an appropriate {@code double}
+ * value; this is the {@code double}-bearing specialization for {@link Function}.
+ *
+ * @param <T> the type of input objects to the function
+ *
+ * @since 1.8
+ */
+public interface DoubleFunction<T> {
+
+    /**
+     * Apply a function to the input object yielding an appropriate
+     * {@code double} value.
+     *
+     * @param t the input object
+     * @return the function result value
+     */
+    public double applyAsDouble(T t);
+}

jdk/src/share/classes/java/util/function/DoubleSupplier.java

@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2012, 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.function;
+
+/**
+ * A supplier of {@code double} values.
+ *
+ * <p/>This is the primitive type specialization of {@link Supplier} for
+ * {@code double} and also may be used as a {@code Supplier<Double>}.
+ *
+ * @since 1.8
+ */
+public interface DoubleSupplier {
+
+    /**
+     * Returns a {@code double} value.
+     *
+     * @return a {@code double} value
+     */
+    public double getAsDouble();
+}

jdk/src/share/classes/java/util/function/DoubleUnaryOperator.java

@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2012, 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.function;
+
+/**
+ * An operation on a single {@code double} operand yielding a {@code double}
+ * result.
+ *
+ * @since 1.8
+ */
+public interface DoubleUnaryOperator {
+
+    /**
+     * Returns the {@code double} result of the operation upon the
+     * {@code double} operand.
+     *
+     * @param operand the operand value
+     * @return the operation result value
+     */
+    public double operateAsDouble(double operand);
+}

jdk/src/share/classes/java/util/function/Function.java

@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2010, 2012 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.function;
+
+/**
+ * Apply a function to the input object yielding an appropriate result object. A
+ * function may variously provide a mapping between types, object instances or
+ * keys and values or any other form of transformation upon the input.
+ *
+ * @param <T> the type of input objects to the {@code apply} operation
+ * @param <R> the type of result objects from the {@code apply} operation. May
+ * be the same type as {@code <T>}.
+ *
+ * @since 1.8
+ */
+public interface Function<T, R> {
+
+    /**
+     * Yield an appropriate result object for the input object.
+     *
+     * @param t the input object
+     * @return the function result
+     */
+    public R apply(T t);
+}

jdk/src/share/classes/java/util/function/IntBinaryOperator.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2012, 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.function;
+
+/**
+ * An operation on two {@code int} operands yielding an {@code int} result.
+ *
+ * @since 1.8
+ */
+public interface IntBinaryOperator {
+
+    /**
+     * Returns the {@code int} result of the operation upon the {@code int}
+     * operands. The parameters are named {@code left} and {@code right} for
+     * operations where the order of parameters matters.
+     *
+     * @param left the left operand value
+     * @param right  the right operand value
+     * @return the result of the operation
+     */
+    public int operateAsInt(int left, int right);
+}

jdk/src/share/classes/java/util/function/IntBlock.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2010, 2012 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.function;
+
+/**
+ * An operation upon an {@code int} input value. The operation may modify
+ * external state.
+ *
+ * <p/>This is the primitive type specialization of {@link Block} for
+ * {@code int} and also may be used as a {@code Block<Integer>}.
+ *
+ * @since 1.8
+ */
+public interface IntBlock {
+
+    /**
+     * Use the {@code int} input value in an operation which may modify external
+     * state.
+     *
+     * @param t the input value
+     */
+   public void accept(int t);
+}

jdk/src/share/classes/java/util/function/IntFunction.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2012, 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.function;
+
+/**
+ * Apply a function to the input object yielding an appropriate {@code int}
+ * value; this is the {@code int}-bearing specialization for {@link Function}.
+ *
+ * @param <T> the type of input objects to the function
+ *
+ * @since 1.8
+ */
+public interface IntFunction<T> {
+
+    /**
+     * Apply a function to the input object yielding an appropriate {@code int}
+     * value.
+     *
+     * @param t the input object
+     * @return the function result value
+     */
+    public int applyAsInt(T t);
+}

jdk/src/share/classes/java/util/function/IntSupplier.java

@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2012, 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.function;
+
+/**
+ * A supplier of {@code int} values.
+ *
+ * <p/>This is the primitive type specialization of {@link Supplier} for
+ * {@code int} and also may be used as a {@code Supplier<Integer>}.
+ *
+ * @since 1.8
+ */
+public interface IntSupplier {
+
+    /**
+     * Returns an {@code int} value.
+     *
+     * @return an {@code int} value
+     */
+    public int getAsInt();
+}

jdk/src/share/classes/java/util/function/IntUnaryOperator.java

@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2012, 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.function;
+
+/**
+ * An operation on a single {@code int} operand yielding an {@code int} result.
+ *
+ * @since 1.8
+ */
+public interface IntUnaryOperator {
+
+    /**
+     * Returns the {@code int} result of the operation upon the {@code int}
+     * operand.
+     *
+     * @param operand the operand value
+     * @return the operation result value
+     */
+    public int operateAsInt(int operand);
+}

jdk/src/share/classes/java/util/function/LongBinaryOperator.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2012, 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.function;
+
+/**
+ * An operation on two {@code long} operands yielding a {@code long} result.
+ *
+ * @since 1.8
+ */
+public interface LongBinaryOperator {
+
+    /**
+     * Returns the {@code long} result of the operation upon the {@code long}
+     * operands. The parameters are named {@code left} and {@code right} for
+     * operations where the order of parameters matters.
+     *
+     * @param left the left operand value
+     * @param right  the right operand value
+     * @return the result of the operation
+     */
+    public long operateAsLong(long left, long right);
+}

jdk/src/share/classes/java/util/function/LongBlock.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2010, 2012 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.function;
+
+/**
+ * An operation upon a {@code long} input value. The operation may modify
+ * external state.
+ *
+ * <p/>This is the primitive type specialization of {@link Block} for
+ * {@code long} and also may be used as a {@code Block<Long>}.
+ *
+ * @since 1.8
+ */
+public interface LongBlock {
+
+    /**
+     * Use the {@code long} input value in an operation which may modify
+     * external state.
+     *
+     * @param t the input value
+     */
+    public void accept(long t);
+}

jdk/src/share/classes/java/util/function/LongFunction.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2012, 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.function;
+
+/**
+ * Apply a function to the input object yielding an appropriate {@code long}
+ * value; this is the {@code long}-bearing specialization for {@link Function}.
+ *
+ * @param <T> the type of input objects to the function
+ *
+ * @since 1.8
+ */
+public interface LongFunction<T> {
+
+    /**
+     * Apply a function to the input object yielding an appropriate {@code long}
+     * value.
+     *
+     * @param t the input object
+     * @return the function result value
+     */
+    public long applyAsLong(T t);
+}

jdk/src/share/classes/java/util/function/LongSupplier.java

@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2012, 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.function;
+
+/**
+ * A supplier of {@code long} values.
+ *
+ * <p/>This is the primitive type specialization of {@link Supplier} for
+ * {@code long} and also may be used as a {@code Supplier<Long>}.
+ *
+ * @since 1.8
+ */
+public interface LongSupplier {
+
+    /**
+     * Returns a {@code long} value.
+     *
+     * @return a {@code long} value.
+     */
+    public long getAsLong();
+}

jdk/src/share/classes/java/util/function/LongUnaryOperator.java

@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2012, 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.function;
+
+/**
+ * An operation on a single {@code long} operand yielding a {@code long} result.
+ *
+ * @since 1.8
+ */
+public interface LongUnaryOperator {
+
+    /**
+     * Returns the {@code long} result of the operation upon the {@code long}
+     * operand.
+     *
+     * @param operand the operand value
+     * @return the operation result value
+     */
+    public long operateAsLong(long operand);
+}

jdk/src/share/classes/java/util/function/Predicate.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2010, 2012 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.function;
+
+/**
+ * Determines if the input object matches some criteria.
+ *
+ * @param <T> the type of input objects to {@code test}
+ *
+ * @since 1.8
+ */
+public interface Predicate<T> {
+
+    /**
+     * Returns {@code true} if the input object matches some criteria.
+     *
+     * @param t the input object
+     * @return {@code true} if the input object matches some criteria, otherwise
+     * {@code false}
+     */
+    public boolean test(T t);
+}

jdk/src/share/classes/java/util/function/Supplier.java

@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2012, 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.function;
+
+/**
+ * A supplier of objects. The result objects are either created during the
+ * invocation of {@link #get} or by some prior action.
+ *
+ * @param <T> The type of objects returned by {@code get}
+ *
+ * @since 1.8
+ */
+public interface Supplier<T> {
+
+    /**
+     * Returns an object.
+     *
+     * @return an object
+     */
+    public T get();
+}

jdk/src/share/classes/java/util/function/UnaryOperator.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2012, 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.function;
+
+/**
+ * An operation upon a single operand yielding a result. The operand and the
+ * result are of the same type.
+ *
+ * @param <T> the type of operand to {@code operate} and of the result
+ *
+ * @since 1.8
+ */
+public interface UnaryOperator<T> {
+
+    /**
+     * Returns the result of the operation upon the operand.
+     *
+     * @param operand the operand
+     * @return the operation result
+     */
+    public T operate(T operand);
+}

jdk/src/share/classes/java/util/function/package-info.java

@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2011, 2012, 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.
+ */
+/**
+ * <em>Functional interfaces</em> provide typing for lambda expressions. Each
+ * functional interface provides a single abstract method to which the lambda
+ * expression's parameter and return types are matched.
+ *
+ * <p>The interfaces in this package are all functional interfaces used with the
+ * collections and streams frameworks. The operation identified by each
+ * interface is generally applied to a collection or stream of objects.
+ *
+ * <p>All functional interface implementations are expected to ensure that:
+ * <ul>
+ * <li>When used for aggregate operations upon many elements it should not be
+ * assumed that the operation will be called upon elements in any specific order.
+ * </li>
+ * <li>{@code null} values are accepted and returned by these functional
+ * interfaces according to the constraints of the specification in which the
+ * functional interfaces are used. The functional interfaces themselves do not
+ * constrain or mandate use of {@code null} values. Most usages of the
+ * functional interfaces will define the role, if any, of {@code null} for that
+ * context.
+ * </li>
+ * </ul>
+ */
+package java.util.function;