8010948: Add conversion functional interfaces

Reviewed-by: mduigou, dholmes
Contributed-by: NBrian Goetz <brian.goetz@oracle.com>

src/share/classes/java/util/function/DoubleToIntFunction.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.function;
+
+/**
+ * Apply a function to the input argument, yielding an appropriate result.
+ * This is the {@code double}-to-{@code int} specialization for {@link Function}.
+ *
+ * @see Function
+ * @see IntToDoubleFunction
+ * @see LongToIntFunction
+ * @since 1.8
+ */
+@FunctionalInterface
+public interface DoubleToIntFunction {
+
+    /**
+     * Compute the result of applying the function to the input arguments.
+     *
+     * @param value the input value
+     * @return the function result value
+     */
+    int applyAsInt(double value);
+}

src/share/classes/java/util/function/DoubleToLongFunction.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.function;
+
+/**
+ * Apply a function to the input argument, yielding an appropriate result.
+ * This is the {@code double}-to-{@code long} specialization for {@link Function}.
+ *
+ * @see Function
+ * @see LongToDoubleFunction
+ * @see IntToLongFunction
+ * @since 1.8
+ */
+@FunctionalInterface
+public interface DoubleToLongFunction {
+
+    /**
+     * Compute the result of applying the function to the input arguments.
+     *
+     * @param value the input value
+     * @return the function result value
+     */
+    long applyAsLong(double value);
+}

src/share/classes/java/util/function/IntToDoubleFunction.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.function;
+
+/**
+ * Apply a function to the input argument, yielding an appropriate result.
+ * This is the {@code int}-to-{@code double} specialization for {@link Function}.
+ *
+ * @see Function
+ * @see DoubleToIntFunction
+ * @see LongToDoubleFunction
+ * @since 1.8
+ */
+@FunctionalInterface
+public interface IntToDoubleFunction {
+
+    /**
+     * Compute the result of applying the function to the input arguments.
+     *
+     * @param value the input value
+     * @return the function result value
+     */
+    double applyAsDouble(int value);
+}

src/share/classes/java/util/function/IntToLongFunction.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.function;
+
+/**
+ * Apply a function to the input argument, yielding an appropriate result.
+ * This is the {@code int}-to-{@code long} specialization for {@link Function}.
+ *
+ * @see Function
+ * @see LongToIntFunction
+ * @see DoubleToLongFunction
+ * @since 1.8
+ */
+@FunctionalInterface
+public interface IntToLongFunction {
+
+    /**
+     * Compute the result of applying the function to the input arguments.
+     *
+     * @param value the input value
+     * @return the function result value
+     */
+    long applyAsLong(int value);
+}

src/share/classes/java/util/function/LongToDoubleFunction.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.function;
+
+/**
+ * Apply a function to the input argument, yielding an appropriate result.
+ * This is the {@code long}-to-{@code double} specialization for {@link Function}.
+ *
+ * @see Function
+ * @see DoubleToLongFunction
+ * @see IntToDoubleFunction
+ * @since 1.8
+ */
+@FunctionalInterface
+public interface LongToDoubleFunction {
+
+    /**
+     * Compute the result of applying the function to the input arguments.
+     *
+     * @param value the input value
+     * @return the function result value
+     */
+    double applyAsDouble(long value);
+}

src/share/classes/java/util/function/LongToIntFunction.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.function;
+
+/**
+ * Apply a function to the input argument, yielding an appropriate result.
+ * This is the {@code long}-to-{@code int} specialization for {@link Function}.
+ *
+ * @see Function
+ * @see IntToLongFunction
+ * @see DoubleToIntFunction
+ * @since 1.8
+ */
+@FunctionalInterface
+public interface LongToIntFunction {
+
+    /**
+     * Compute the result of applying the function to the input arguments.
+     *
+     * @param value the input value
+     * @return the function result value
+     */
+    int applyAsInt(long value);
+}