--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.base/share/classes/sun/invoke/util/Wrapper.java Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,630 @@
+/*
+ * Copyright (c) 2008, 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 sun.invoke.util;
+
+public enum Wrapper {
+ // wrapperType simple primitiveType simple char emptyArray format
+ BOOLEAN( Boolean.class, "Boolean", boolean.class, "boolean", 'Z', new boolean[0], Format.unsigned( 1)),
+ // These must be in the order defined for widening primitive conversions in JLS 5.1.2
+ // Avoid boxing integral types here to defer initialization of internal caches
+ BYTE ( Byte.class, "Byte", byte.class, "byte", 'B', new byte[0], Format.signed( 8)),
+ SHORT ( Short.class, "Short", short.class, "short", 'S', new short[0], Format.signed( 16)),
+ CHAR (Character.class, "Character", char.class, "char", 'C', new char[0], Format.unsigned(16)),
+ INT ( Integer.class, "Integer", int.class, "int", 'I', new int[0], Format.signed( 32)),
+ LONG ( Long.class, "Long", long.class, "long", 'J', new long[0], Format.signed( 64)),
+ FLOAT ( Float.class, "Float", float.class, "float", 'F', new float[0], Format.floating(32)),
+ DOUBLE ( Double.class, "Double", double.class, "double", 'D', new double[0], Format.floating(64)),
+ OBJECT ( Object.class, "Object", Object.class, "Object", 'L', new Object[0], Format.other( 1)),
+ // VOID must be the last type, since it is "assignable" from any other type:
+ VOID ( Void.class, "Void", void.class, "void", 'V', null, Format.other( 0)),
+ ;
+
+ public static final int COUNT = 10;
+
+ private final Class<?> wrapperType;
+ private final Class<?> primitiveType;
+ private final char basicTypeChar;
+ private final Object emptyArray;
+ private final int format;
+ private final String wrapperSimpleName;
+ private final String primitiveSimpleName;
+
+ private Wrapper(Class<?> wtype, String wtypeName, Class<?> ptype, String ptypeName, char tchar, Object emptyArray, int format) {
+ this.wrapperType = wtype;
+ this.primitiveType = ptype;
+ this.basicTypeChar = tchar;
+ this.emptyArray = emptyArray;
+ this.format = format;
+ this.wrapperSimpleName = wtypeName;
+ this.primitiveSimpleName = ptypeName;
+ }
+
+ /** For debugging, give the details of this wrapper. */
+ public String detailString() {
+ return wrapperSimpleName+
+ java.util.Arrays.asList(wrapperType, primitiveType,
+ basicTypeChar, zero(),
+ "0x"+Integer.toHexString(format));
+ }
+
+ private abstract static class Format {
+ static final int SLOT_SHIFT = 0, SIZE_SHIFT = 2, KIND_SHIFT = 12;
+ static final int
+ SIGNED = (-1) << KIND_SHIFT,
+ UNSIGNED = 0 << KIND_SHIFT,
+ FLOATING = 1 << KIND_SHIFT;
+ static final int
+ SLOT_MASK = ((1<<(SIZE_SHIFT-SLOT_SHIFT))-1),
+ SIZE_MASK = ((1<<(KIND_SHIFT-SIZE_SHIFT))-1);
+ static int format(int kind, int size, int slots) {
+ assert(((kind >> KIND_SHIFT) << KIND_SHIFT) == kind);
+ assert((size & (size-1)) == 0); // power of two
+ assert((kind == SIGNED) ? (size > 0) :
+ (kind == UNSIGNED) ? (size > 0) :
+ (kind == FLOATING) ? (size == 32 || size == 64) :
+ false);
+ assert((slots == 2) ? (size == 64) :
+ (slots == 1) ? (size <= 32) :
+ false);
+ return kind | (size << SIZE_SHIFT) | (slots << SLOT_SHIFT);
+ }
+ static final int
+ INT = SIGNED | (32 << SIZE_SHIFT) | (1 << SLOT_SHIFT),
+ SHORT = SIGNED | (16 << SIZE_SHIFT) | (1 << SLOT_SHIFT),
+ BOOLEAN = UNSIGNED | (1 << SIZE_SHIFT) | (1 << SLOT_SHIFT),
+ CHAR = UNSIGNED | (16 << SIZE_SHIFT) | (1 << SLOT_SHIFT),
+ FLOAT = FLOATING | (32 << SIZE_SHIFT) | (1 << SLOT_SHIFT),
+ VOID = UNSIGNED | (0 << SIZE_SHIFT) | (0 << SLOT_SHIFT),
+ NUM_MASK = (-1) << SIZE_SHIFT;
+ static int signed(int size) { return format(SIGNED, size, (size > 32 ? 2 : 1)); }
+ static int unsigned(int size) { return format(UNSIGNED, size, (size > 32 ? 2 : 1)); }
+ static int floating(int size) { return format(FLOATING, size, (size > 32 ? 2 : 1)); }
+ static int other(int slots) { return slots << SLOT_SHIFT; }
+ }
+
+ /// format queries:
+
+ /** How many bits are in the wrapped value? Returns 0 for OBJECT or VOID. */
+ public int bitWidth() { return (format >> Format.SIZE_SHIFT) & Format.SIZE_MASK; }
+ /** How many JVM stack slots occupied by the wrapped value? Returns 0 for VOID. */
+ public int stackSlots() { return (format >> Format.SLOT_SHIFT) & Format.SLOT_MASK; }
+ /** Does the wrapped value occupy a single JVM stack slot? */
+ public boolean isSingleWord() { return (format & (1 << Format.SLOT_SHIFT)) != 0; }
+ /** Does the wrapped value occupy two JVM stack slots? */
+ public boolean isDoubleWord() { return (format & (2 << Format.SLOT_SHIFT)) != 0; }
+ /** Is the wrapped type numeric (not void or object)? */
+ public boolean isNumeric() { return (format & Format.NUM_MASK) != 0; }
+ /** Is the wrapped type a primitive other than float, double, or void? */
+ public boolean isIntegral() { return isNumeric() && format < Format.FLOAT; }
+ /** Is the wrapped type one of int, boolean, byte, char, or short? */
+ public boolean isSubwordOrInt() { return isIntegral() && isSingleWord(); }
+ /* Is the wrapped value a signed integral type (one of byte, short, int, or long)? */
+ public boolean isSigned() { return format < Format.VOID; }
+ /* Is the wrapped value an unsigned integral type (one of boolean or char)? */
+ public boolean isUnsigned() { return format >= Format.BOOLEAN && format < Format.FLOAT; }
+ /** Is the wrapped type either float or double? */
+ public boolean isFloating() { return format >= Format.FLOAT; }
+ /** Is the wrapped type either void or a reference? */
+ public boolean isOther() { return (format & ~Format.SLOT_MASK) == 0; }
+
+ /** Does the JLS 5.1.2 allow a variable of this wrapper's
+ * primitive type to be assigned from a value of the given wrapper's primitive type?
+ * Cases:
+ * <ul>
+ * <li>unboxing followed by widening primitive conversion
+ * <li>any type converted to {@code void} (i.e., dropping a method call's value)
+ * <li>boxing conversion followed by widening reference conversion to {@code Object}
+ * </ul>
+ * These are the cases allowed by MethodHandle.asType.
+ */
+ public boolean isConvertibleFrom(Wrapper source) {
+ if (this == source) return true;
+ if (this.compareTo(source) < 0) {
+ // At best, this is a narrowing conversion.
+ return false;
+ }
+ // All conversions are allowed in the enum order between floats and signed ints.
+ // First detect non-signed non-float types (boolean, char, Object, void).
+ boolean floatOrSigned = (((this.format & source.format) & Format.SIGNED) != 0);
+ if (!floatOrSigned) {
+ if (this.isOther()) return true;
+ // can convert char to int or wider, but nothing else
+ if (source.format == Format.CHAR) return true;
+ // no other conversions are classified as widening
+ return false;
+ }
+ // All signed and float conversions in the enum order are widening.
+ assert(this.isFloating() || this.isSigned());
+ assert(source.isFloating() || source.isSigned());
+ return true;
+ }
+
+ static {
+ assert(checkConvertibleFrom());
+ assert(COUNT == Wrapper.values().length);
+ }
+ private static boolean checkConvertibleFrom() {
+ // Check the matrix for correct classification of widening conversions.
+ for (Wrapper w : values()) {
+ assert(w.isConvertibleFrom(w));
+ assert(VOID.isConvertibleFrom(w));
+ if (w != VOID) {
+ assert(OBJECT.isConvertibleFrom(w));
+ assert(!w.isConvertibleFrom(VOID));
+ }
+ // check relations with unsigned integral types:
+ if (w != CHAR) {
+ assert(!CHAR.isConvertibleFrom(w));
+ if (!w.isConvertibleFrom(INT))
+ assert(!w.isConvertibleFrom(CHAR));
+ }
+ if (w != BOOLEAN) {
+ assert(!BOOLEAN.isConvertibleFrom(w));
+ if (w != VOID && w != OBJECT)
+ assert(!w.isConvertibleFrom(BOOLEAN));
+ }
+ // check relations with signed integral types:
+ if (w.isSigned()) {
+ for (Wrapper x : values()) {
+ if (w == x) continue;
+ if (x.isFloating())
+ assert(!w.isConvertibleFrom(x));
+ else if (x.isSigned()) {
+ if (w.compareTo(x) < 0)
+ assert(!w.isConvertibleFrom(x));
+ else
+ assert(w.isConvertibleFrom(x));
+ }
+ }
+ }
+ // check relations with floating types:
+ if (w.isFloating()) {
+ for (Wrapper x : values()) {
+ if (w == x) continue;
+ if (x.isSigned())
+ assert(w.isConvertibleFrom(x));
+ else if (x.isFloating()) {
+ if (w.compareTo(x) < 0)
+ assert(!w.isConvertibleFrom(x));
+ else
+ assert(w.isConvertibleFrom(x));
+ }
+ }
+ }
+ }
+ return true; // i.e., assert(true)
+ }
+
+ /** Produce a zero value for the given wrapper type.
+ * This will be a numeric zero for a number or character,
+ * false for a boolean, and null for a reference or void.
+ * The common thread is that this is what is contained
+ * in a default-initialized variable of the given primitive
+ * type. (For void, it is what a reflective method returns
+ * instead of no value at all.)
+ */
+ public Object zero() {
+ switch (this) {
+ case BOOLEAN:
+ return Boolean.FALSE;
+ case INT:
+ return (Integer)0;
+ case BYTE:
+ return (Byte)(byte)0;
+ case CHAR:
+ return (Character)(char)0;
+ case SHORT:
+ return (Short)(short)0;
+ case LONG:
+ return (Long)(long)0;
+ case FLOAT:
+ return FLOAT_ZERO;
+ case DOUBLE:
+ return DOUBLE_ZERO;
+ case VOID:
+ case OBJECT:
+ default:
+ return null;
+ }
+ }
+
+ private static final Object DOUBLE_ZERO = (Double)(double)0;
+ private static final Object FLOAT_ZERO = (Float)(float)0;
+
+ /** Produce a zero value for the given wrapper type T.
+ * The optional argument must a type compatible with this wrapper.
+ * Equivalent to {@code this.cast(this.zero(), type)}.
+ */
+ public <T> T zero(Class<T> type) { return convert(zero(), type); }
+
+ /** Return the wrapper that wraps values of the given type.
+ * The type may be {@code Object}, meaning the {@code OBJECT} wrapper.
+ * Otherwise, the type must be a primitive.
+ * @throws IllegalArgumentException for unexpected types
+ */
+ public static Wrapper forPrimitiveType(Class<?> type) {
+ Wrapper w = findPrimitiveType(type);
+ if (w != null) return w;
+ if (type.isPrimitive())
+ throw new InternalError(); // redo hash function
+ throw newIllegalArgumentException("not primitive: "+type);
+ }
+
+ static Wrapper findPrimitiveType(Class<?> type) {
+ Wrapper w = FROM_PRIM[hashPrim(type)];
+ if (w != null && w.primitiveType == type) {
+ return w;
+ }
+ return null;
+ }
+
+ /** Return the wrapper that wraps values into the given wrapper type.
+ * If it is {@code Object}, return {@code OBJECT}.
+ * Otherwise, it must be a wrapper type.
+ * The type must not be a primitive type.
+ * @throws IllegalArgumentException for unexpected types
+ */
+ public static Wrapper forWrapperType(Class<?> type) {
+ Wrapper w = findWrapperType(type);
+ if (w != null) return w;
+ for (Wrapper x : values())
+ if (x.wrapperType == type)
+ throw new InternalError(); // redo hash function
+ throw newIllegalArgumentException("not wrapper: "+type);
+ }
+
+ static Wrapper findWrapperType(Class<?> type) {
+ Wrapper w = FROM_WRAP[hashWrap(type)];
+ if (w != null && w.wrapperType == type) {
+ return w;
+ }
+ return null;
+ }
+
+ /** Return the wrapper that corresponds to the given bytecode
+ * signature character. Return {@code OBJECT} for the character 'L'.
+ * @throws IllegalArgumentException for any non-signature character or {@code '['}.
+ */
+ public static Wrapper forBasicType(char type) {
+ Wrapper w = FROM_CHAR[hashChar(type)];
+ if (w != null && w.basicTypeChar == type) {
+ return w;
+ }
+ for (Wrapper x : values())
+ if (w.basicTypeChar == type)
+ throw new InternalError(); // redo hash function
+ throw newIllegalArgumentException("not basic type char: "+type);
+ }
+
+ /** Return the wrapper for the given type, if it is
+ * a primitive type, else return {@code OBJECT}.
+ */
+ public static Wrapper forBasicType(Class<?> type) {
+ if (type.isPrimitive())
+ return forPrimitiveType(type);
+ return OBJECT; // any reference, including wrappers or arrays
+ }
+
+ // Note on perfect hashes:
+ // for signature chars c, do (c + (c >> 1)) % 16
+ // for primitive type names n, do (n[0] + n[2]) % 16
+ // The type name hash works for both primitive and wrapper names.
+ // You can add "java/lang/Object" to the primitive names.
+ // But you add the wrapper name Object, use (n[2] + (3*n[1])) % 16.
+ private static final Wrapper[] FROM_PRIM = new Wrapper[16];
+ private static final Wrapper[] FROM_WRAP = new Wrapper[16];
+ private static final Wrapper[] FROM_CHAR = new Wrapper[16];
+ private static int hashPrim(Class<?> x) {
+ String xn = x.getName();
+ if (xn.length() < 3) return 0;
+ return (xn.charAt(0) + xn.charAt(2)) % 16;
+ }
+ private static int hashWrap(Class<?> x) {
+ String xn = x.getName();
+ final int offset = 10; assert(offset == "java.lang.".length());
+ if (xn.length() < offset+3) return 0;
+ return (3*xn.charAt(offset+1) + xn.charAt(offset+2)) % 16;
+ }
+ private static int hashChar(char x) {
+ return (x + (x >> 1)) % 16;
+ }
+ static {
+ for (Wrapper w : values()) {
+ int pi = hashPrim(w.primitiveType);
+ int wi = hashWrap(w.wrapperType);
+ int ci = hashChar(w.basicTypeChar);
+ assert(FROM_PRIM[pi] == null);
+ assert(FROM_WRAP[wi] == null);
+ assert(FROM_CHAR[ci] == null);
+ FROM_PRIM[pi] = w;
+ FROM_WRAP[wi] = w;
+ FROM_CHAR[ci] = w;
+ }
+ //assert(jdk.sun.invoke.util.WrapperTest.test(false));
+ }
+
+ /** What is the primitive type wrapped by this wrapper? */
+ public Class<?> primitiveType() { return primitiveType; }
+
+ /** What is the wrapper type for this wrapper? */
+ public Class<?> wrapperType() { return wrapperType; }
+
+ /** What is the wrapper type for this wrapper?
+ * Otherwise, the example type must be the wrapper type,
+ * or the corresponding primitive type.
+ * (For {@code OBJECT}, the example type can be any non-primitive,
+ * and is normalized to {@code Object.class}.)
+ * The resulting class type has the same type parameter.
+ */
+ public <T> Class<T> wrapperType(Class<T> exampleType) {
+ if (exampleType == wrapperType) {
+ return exampleType;
+ } else if (exampleType == primitiveType ||
+ wrapperType == Object.class ||
+ exampleType.isInterface()) {
+ return forceType(wrapperType, exampleType);
+ }
+ throw newClassCastException(exampleType, primitiveType);
+ }
+
+ private static ClassCastException newClassCastException(Class<?> actual, Class<?> expected) {
+ return new ClassCastException(actual + " is not compatible with " + expected);
+ }
+
+ /** If {@code type} is a primitive type, return the corresponding
+ * wrapper type, else return {@code type} unchanged.
+ */
+ public static <T> Class<T> asWrapperType(Class<T> type) {
+ if (type.isPrimitive()) {
+ return forPrimitiveType(type).wrapperType(type);
+ }
+ return type;
+ }
+
+ /** If {@code type} is a wrapper type, return the corresponding
+ * primitive type, else return {@code type} unchanged.
+ */
+ public static <T> Class<T> asPrimitiveType(Class<T> type) {
+ Wrapper w = findWrapperType(type);
+ if (w != null) {
+ return forceType(w.primitiveType(), type);
+ }
+ return type;
+ }
+
+ /** Query: Is the given type a wrapper, such as {@code Integer} or {@code Void}? */
+ public static boolean isWrapperType(Class<?> type) {
+ return findWrapperType(type) != null;
+ }
+
+ /** Query: Is the given type a primitive, such as {@code int} or {@code void}? */
+ public static boolean isPrimitiveType(Class<?> type) {
+ return type.isPrimitive();
+ }
+
+ /** What is the bytecode signature character for this type?
+ * All non-primitives, including array types, report as 'L', the signature character for references.
+ */
+ public static char basicTypeChar(Class<?> type) {
+ if (!type.isPrimitive())
+ return 'L';
+ else
+ return forPrimitiveType(type).basicTypeChar();
+ }
+
+ /** What is the bytecode signature character for this wrapper's
+ * primitive type?
+ */
+ public char basicTypeChar() { return basicTypeChar; }
+
+ /** What is the simple name of the wrapper type?
+ */
+ public String wrapperSimpleName() { return wrapperSimpleName; }
+
+ /** What is the simple name of the primitive type?
+ */
+ public String primitiveSimpleName() { return primitiveSimpleName; }
+
+// /** Wrap a value in the given type, which may be either a primitive or wrapper type.
+// * Performs standard primitive conversions, including truncation and float conversions.
+// */
+// public static <T> T wrap(Object x, Class<T> type) {
+// return Wrapper.valueOf(type).cast(x, type);
+// }
+
+ /** Cast a wrapped value to the given type, which may be either a primitive or wrapper type.
+ * The given target type must be this wrapper's primitive or wrapper type.
+ * If this wrapper is OBJECT, the target type may also be an interface, perform no runtime check.
+ * Performs standard primitive conversions, including truncation and float conversions.
+ * The given type must be compatible with this wrapper. That is, it must either
+ * be the wrapper type (or a subtype, in the case of {@code OBJECT}) or else
+ * it must be the wrapper's primitive type.
+ * Primitive conversions are only performed if the given type is itself a primitive.
+ * @throws ClassCastException if the given type is not compatible with this wrapper
+ */
+ public <T> T cast(Object x, Class<T> type) {
+ return convert(x, type, true);
+ }
+
+ /** Convert a wrapped value to the given type.
+ * The given target type must be this wrapper's primitive or wrapper type.
+ * This is equivalent to {@link #cast}, except that it refuses to perform
+ * narrowing primitive conversions.
+ */
+ public <T> T convert(Object x, Class<T> type) {
+ return convert(x, type, false);
+ }
+
+ private <T> T convert(Object x, Class<T> type, boolean isCast) {
+ if (this == OBJECT) {
+ // If the target wrapper is OBJECT, just do a reference cast.
+ // If the target type is an interface, perform no runtime check.
+ // (This loophole is safe, and is allowed by the JVM verifier.)
+ // If the target type is a primitive, change it to a wrapper.
+ assert(!type.isPrimitive());
+ if (!type.isInterface())
+ type.cast(x);
+ @SuppressWarnings("unchecked")
+ T result = (T) x; // unchecked warning is expected here
+ return result;
+ }
+ Class<T> wtype = wrapperType(type);
+ if (wtype.isInstance(x)) {
+ return wtype.cast(x);
+ }
+ if (!isCast) {
+ Class<?> sourceType = x.getClass(); // throw NPE if x is null
+ Wrapper source = findWrapperType(sourceType);
+ if (source == null || !this.isConvertibleFrom(source)) {
+ throw newClassCastException(wtype, sourceType);
+ }
+ } else if (x == null) {
+ @SuppressWarnings("unchecked")
+ T z = (T) zero();
+ return z;
+ }
+ @SuppressWarnings("unchecked")
+ T result = (T) wrap(x); // unchecked warning is expected here
+ assert (result == null ? Void.class : result.getClass()) == wtype;
+ return result;
+ }
+
+ /** Cast a reference type to another reference type.
+ * If the target type is an interface, perform no runtime check.
+ * (This loophole is safe, and is allowed by the JVM verifier.)
+ * If the target type is a primitive, change it to a wrapper.
+ */
+ static <T> Class<T> forceType(Class<?> type, Class<T> exampleType) {
+ assert(type == exampleType ||
+ type.isPrimitive() && forPrimitiveType(type) == findWrapperType(exampleType) ||
+ exampleType.isPrimitive() && forPrimitiveType(exampleType) == findWrapperType(type) ||
+ type == Object.class && !exampleType.isPrimitive());
+ @SuppressWarnings("unchecked")
+ Class<T> result = (Class<T>) type; // unchecked warning is expected here
+ return result;
+ }
+
+ /** Wrap a value in this wrapper's type.
+ * Performs standard primitive conversions, including truncation and float conversions.
+ * Performs returns the unchanged reference for {@code OBJECT}.
+ * Returns null for {@code VOID}.
+ * Returns a zero value for a null input.
+ * @throws ClassCastException if this wrapper is numeric and the operand
+ * is not a number, character, boolean, or null
+ */
+ public Object wrap(Object x) {
+ // do non-numeric wrappers first
+ switch (basicTypeChar) {
+ case 'L': return x;
+ case 'V': return null;
+ }
+ Number xn = numberValue(x);
+ switch (basicTypeChar) {
+ case 'I': return Integer.valueOf(xn.intValue());
+ case 'J': return Long.valueOf(xn.longValue());
+ case 'F': return Float.valueOf(xn.floatValue());
+ case 'D': return Double.valueOf(xn.doubleValue());
+ case 'S': return Short.valueOf((short) xn.intValue());
+ case 'B': return Byte.valueOf((byte) xn.intValue());
+ case 'C': return Character.valueOf((char) xn.intValue());
+ case 'Z': return Boolean.valueOf(boolValue(xn.byteValue()));
+ }
+ throw new InternalError("bad wrapper");
+ }
+
+ /** Wrap a value (an int or smaller value) in this wrapper's type.
+ * Performs standard primitive conversions, including truncation and float conversions.
+ * Produces an {@code Integer} for {@code OBJECT}, although the exact type
+ * of the operand is not known.
+ * Returns null for {@code VOID}.
+ */
+ public Object wrap(int x) {
+ if (basicTypeChar == 'L') return (Integer)x;
+ switch (basicTypeChar) {
+ case 'L': throw newIllegalArgumentException("cannot wrap to object type");
+ case 'V': return null;
+ case 'I': return Integer.valueOf(x);
+ case 'J': return Long.valueOf(x);
+ case 'F': return Float.valueOf(x);
+ case 'D': return Double.valueOf(x);
+ case 'S': return Short.valueOf((short) x);
+ case 'B': return Byte.valueOf((byte) x);
+ case 'C': return Character.valueOf((char) x);
+ case 'Z': return Boolean.valueOf(boolValue((byte) x));
+ }
+ throw new InternalError("bad wrapper");
+ }
+
+ private static Number numberValue(Object x) {
+ if (x instanceof Number) return (Number)x;
+ if (x instanceof Character) return (int)(Character)x;
+ if (x instanceof Boolean) return (Boolean)x ? 1 : 0;
+ // Remaining allowed case of void: Must be a null reference.
+ return (Number)x;
+ }
+
+ // Parameter type of boolValue must be byte, because
+ // MethodHandles.explicitCastArguments defines boolean
+ // conversion as first converting to byte.
+ private static boolean boolValue(byte bits) {
+ bits &= 1; // simple 31-bit zero extension
+ return (bits != 0);
+ }
+
+ private static RuntimeException newIllegalArgumentException(String message, Object x) {
+ return newIllegalArgumentException(message + x);
+ }
+ private static RuntimeException newIllegalArgumentException(String message) {
+ return new IllegalArgumentException(message);
+ }
+
+ // primitive array support
+ public Object makeArray(int len) {
+ return java.lang.reflect.Array.newInstance(primitiveType, len);
+ }
+ public Class<?> arrayType() {
+ return emptyArray.getClass();
+ }
+ public void copyArrayUnboxing(Object[] values, int vpos, Object a, int apos, int length) {
+ if (a.getClass() != arrayType())
+ arrayType().cast(a); // throw NPE or CCE if bad type
+ for (int i = 0; i < length; i++) {
+ Object value = values[i+vpos];
+ value = convert(value, primitiveType);
+ java.lang.reflect.Array.set(a, i+apos, value);
+ }
+ }
+ public void copyArrayBoxing(Object a, int apos, Object[] values, int vpos, int length) {
+ if (a.getClass() != arrayType())
+ arrayType().cast(a); // throw NPE or CCE if bad type
+ for (int i = 0; i < length; i++) {
+ Object value = java.lang.reflect.Array.get(a, i+apos);
+ //Already done: value = convert(value, primitiveType);
+ assert(value.getClass() == wrapperType);
+ values[i+vpos] = value;
+ }
+ }
+}