--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/sun/reflect/UnsafeFieldAccessorImpl.java Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,203 @@
+/*
+ * Copyright 2001-2005 Sun Microsystems, Inc. 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. Sun designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+package sun.reflect;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.Modifier;
+import sun.misc.Unsafe;
+
+/** Base class for sun.misc.Unsafe-based FieldAccessors. The
+ observation is that there are only nine types of fields from the
+ standpoint of reflection code: the eight primitive types and
+ Object. Using class Unsafe instead of generated bytecodes saves
+ memory and loading time for the dynamically-generated
+ FieldAccessors. */
+
+abstract class UnsafeFieldAccessorImpl extends FieldAccessorImpl {
+ static final Unsafe unsafe = Unsafe.getUnsafe();
+
+ protected final Field field;
+ protected final int fieldOffset;
+ protected final boolean isFinal;
+
+ UnsafeFieldAccessorImpl(Field field) {
+ this.field = field;
+ fieldOffset = unsafe.fieldOffset(field);
+ isFinal = Modifier.isFinal(field.getModifiers());
+ }
+
+ protected void ensureObj(Object o) {
+ // NOTE: will throw NullPointerException, as specified, if o is null
+ if (!field.getDeclaringClass().isAssignableFrom(o.getClass())) {
+ throwSetIllegalArgumentException(o);
+ }
+ }
+
+ private String getQualifiedFieldName() {
+ return field.getDeclaringClass().getName() + "." +field.getName();
+ }
+
+ protected IllegalArgumentException newGetIllegalArgumentException(String type) {
+ return new IllegalArgumentException(
+ "Attempt to get "+field.getType().getName()+" field \"" +
+ getQualifiedFieldName() + "\" with illegal data type conversion to "+type
+ );
+ }
+
+ protected void throwFinalFieldIllegalAccessException(String attemptedType,
+ String attemptedValue)
+ throws IllegalAccessException {
+ throw new IllegalAccessException(getSetMessage(attemptedType, attemptedValue));
+
+ }
+ protected void throwFinalFieldIllegalAccessException(Object o) throws IllegalAccessException {
+ throwFinalFieldIllegalAccessException(o != null ? o.getClass().getName() : "", "");
+ }
+
+ protected void throwFinalFieldIllegalAccessException(boolean z) throws IllegalAccessException {
+ throwFinalFieldIllegalAccessException("boolean", Boolean.toString(z));
+ }
+
+ protected void throwFinalFieldIllegalAccessException(char b) throws IllegalAccessException {
+ throwFinalFieldIllegalAccessException("char", Character.toString(b));
+ }
+
+ protected void throwFinalFieldIllegalAccessException(byte b) throws IllegalAccessException {
+ throwFinalFieldIllegalAccessException("byte", Byte.toString(b));
+ }
+
+ protected void throwFinalFieldIllegalAccessException(short b) throws IllegalAccessException {
+ throwFinalFieldIllegalAccessException("short", Short.toString(b));
+ }
+
+ protected void throwFinalFieldIllegalAccessException(int i) throws IllegalAccessException {
+ throwFinalFieldIllegalAccessException("int", Integer.toString(i));
+ }
+
+ protected void throwFinalFieldIllegalAccessException(long i) throws IllegalAccessException {
+ throwFinalFieldIllegalAccessException("long", Long.toString(i));
+ }
+
+ protected void throwFinalFieldIllegalAccessException(float f) throws IllegalAccessException {
+ throwFinalFieldIllegalAccessException("float", Float.toString(f));
+ }
+
+ protected void throwFinalFieldIllegalAccessException(double f) throws IllegalAccessException {
+ throwFinalFieldIllegalAccessException("double", Double.toString(f));
+ }
+
+ protected IllegalArgumentException newGetBooleanIllegalArgumentException() {
+ return newGetIllegalArgumentException("boolean");
+ }
+
+ protected IllegalArgumentException newGetByteIllegalArgumentException() {
+ return newGetIllegalArgumentException("byte");
+ }
+
+ protected IllegalArgumentException newGetCharIllegalArgumentException() {
+ return newGetIllegalArgumentException("char");
+ }
+
+ protected IllegalArgumentException newGetShortIllegalArgumentException() {
+ return newGetIllegalArgumentException("short");
+ }
+
+ protected IllegalArgumentException newGetIntIllegalArgumentException() {
+ return newGetIllegalArgumentException("int");
+ }
+
+ protected IllegalArgumentException newGetLongIllegalArgumentException() {
+ return newGetIllegalArgumentException("long");
+ }
+
+ protected IllegalArgumentException newGetFloatIllegalArgumentException() {
+ return newGetIllegalArgumentException("float");
+ }
+
+ protected IllegalArgumentException newGetDoubleIllegalArgumentException() {
+ return newGetIllegalArgumentException("double");
+ }
+
+ protected String getSetMessage(String attemptedType, String attemptedValue) {
+ String err = "Can not set";
+ if (Modifier.isStatic(field.getModifiers()))
+ err += " static";
+ if (isFinal)
+ err += " final";
+ err += " " + field.getType().getName() + " field " + getQualifiedFieldName() + " to ";
+ if (attemptedValue.length() > 0) {
+ err += "(" + attemptedType + ")" + attemptedValue;
+ } else {
+ if (attemptedType.length() > 0)
+ err += attemptedType;
+ else
+ err += "null value";
+ }
+ return err;
+ }
+
+ protected void throwSetIllegalArgumentException(String attemptedType,
+ String attemptedValue) {
+ throw new IllegalArgumentException(getSetMessage(attemptedType,attemptedValue));
+ }
+
+ protected void throwSetIllegalArgumentException(Object o) {
+ throwSetIllegalArgumentException(o != null ? o.getClass().getName() : "", "");
+ }
+
+ protected void throwSetIllegalArgumentException(boolean b) {
+ throwSetIllegalArgumentException("boolean", Boolean.toString(b));
+ }
+
+ protected void throwSetIllegalArgumentException(byte b) {
+ throwSetIllegalArgumentException("byte", Byte.toString(b));
+ }
+
+ protected void throwSetIllegalArgumentException(char c) {
+ throwSetIllegalArgumentException("char", Character.toString(c));
+ }
+
+ protected void throwSetIllegalArgumentException(short s) {
+ throwSetIllegalArgumentException("short", Short.toString(s));
+ }
+
+ protected void throwSetIllegalArgumentException(int i) {
+ throwSetIllegalArgumentException("int", Integer.toString(i));
+ }
+
+ protected void throwSetIllegalArgumentException(long l) {
+ throwSetIllegalArgumentException("long", Long.toString(l));
+ }
+
+ protected void throwSetIllegalArgumentException(float f) {
+ throwSetIllegalArgumentException("float", Float.toString(f));
+ }
+
+ protected void throwSetIllegalArgumentException(double d) {
+ throwSetIllegalArgumentException("double", Double.toString(d));
+ }
+
+}