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/*
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* Copyright (c) 2001, 2005, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package sun.reflect;
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import java.lang.reflect.Field;
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import java.lang.reflect.Modifier;
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import sun.misc.Unsafe;
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/** Base class for sun.misc.Unsafe-based FieldAccessors. The
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observation is that there are only nine types of fields from the
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standpoint of reflection code: the eight primitive types and
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Object. Using class Unsafe instead of generated bytecodes saves
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memory and loading time for the dynamically-generated
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FieldAccessors. */
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abstract class UnsafeFieldAccessorImpl extends FieldAccessorImpl {
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static final Unsafe unsafe = Unsafe.getUnsafe();
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protected final Field field;
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protected final int fieldOffset;
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protected final boolean isFinal;
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UnsafeFieldAccessorImpl(Field field) {
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this.field = field;
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fieldOffset = unsafe.fieldOffset(field);
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isFinal = Modifier.isFinal(field.getModifiers());
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}
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protected void ensureObj(Object o) {
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// NOTE: will throw NullPointerException, as specified, if o is null
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if (!field.getDeclaringClass().isAssignableFrom(o.getClass())) {
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throwSetIllegalArgumentException(o);
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}
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}
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private String getQualifiedFieldName() {
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return field.getDeclaringClass().getName() + "." +field.getName();
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}
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protected IllegalArgumentException newGetIllegalArgumentException(String type) {
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return new IllegalArgumentException(
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"Attempt to get "+field.getType().getName()+" field \"" +
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getQualifiedFieldName() + "\" with illegal data type conversion to "+type
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);
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}
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protected void throwFinalFieldIllegalAccessException(String attemptedType,
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String attemptedValue)
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throws IllegalAccessException {
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throw new IllegalAccessException(getSetMessage(attemptedType, attemptedValue));
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}
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protected void throwFinalFieldIllegalAccessException(Object o) throws IllegalAccessException {
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throwFinalFieldIllegalAccessException(o != null ? o.getClass().getName() : "", "");
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}
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protected void throwFinalFieldIllegalAccessException(boolean z) throws IllegalAccessException {
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throwFinalFieldIllegalAccessException("boolean", Boolean.toString(z));
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}
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protected void throwFinalFieldIllegalAccessException(char b) throws IllegalAccessException {
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throwFinalFieldIllegalAccessException("char", Character.toString(b));
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}
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protected void throwFinalFieldIllegalAccessException(byte b) throws IllegalAccessException {
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throwFinalFieldIllegalAccessException("byte", Byte.toString(b));
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}
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protected void throwFinalFieldIllegalAccessException(short b) throws IllegalAccessException {
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throwFinalFieldIllegalAccessException("short", Short.toString(b));
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}
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protected void throwFinalFieldIllegalAccessException(int i) throws IllegalAccessException {
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throwFinalFieldIllegalAccessException("int", Integer.toString(i));
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}
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protected void throwFinalFieldIllegalAccessException(long i) throws IllegalAccessException {
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throwFinalFieldIllegalAccessException("long", Long.toString(i));
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}
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protected void throwFinalFieldIllegalAccessException(float f) throws IllegalAccessException {
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throwFinalFieldIllegalAccessException("float", Float.toString(f));
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}
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protected void throwFinalFieldIllegalAccessException(double f) throws IllegalAccessException {
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throwFinalFieldIllegalAccessException("double", Double.toString(f));
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}
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protected IllegalArgumentException newGetBooleanIllegalArgumentException() {
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return newGetIllegalArgumentException("boolean");
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}
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protected IllegalArgumentException newGetByteIllegalArgumentException() {
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return newGetIllegalArgumentException("byte");
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}
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protected IllegalArgumentException newGetCharIllegalArgumentException() {
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return newGetIllegalArgumentException("char");
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}
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protected IllegalArgumentException newGetShortIllegalArgumentException() {
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return newGetIllegalArgumentException("short");
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}
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protected IllegalArgumentException newGetIntIllegalArgumentException() {
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return newGetIllegalArgumentException("int");
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}
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protected IllegalArgumentException newGetLongIllegalArgumentException() {
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return newGetIllegalArgumentException("long");
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}
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protected IllegalArgumentException newGetFloatIllegalArgumentException() {
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return newGetIllegalArgumentException("float");
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}
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protected IllegalArgumentException newGetDoubleIllegalArgumentException() {
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return newGetIllegalArgumentException("double");
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}
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protected String getSetMessage(String attemptedType, String attemptedValue) {
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String err = "Can not set";
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if (Modifier.isStatic(field.getModifiers()))
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err += " static";
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if (isFinal)
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err += " final";
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err += " " + field.getType().getName() + " field " + getQualifiedFieldName() + " to ";
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if (attemptedValue.length() > 0) {
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err += "(" + attemptedType + ")" + attemptedValue;
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} else {
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if (attemptedType.length() > 0)
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err += attemptedType;
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else
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err += "null value";
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}
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return err;
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}
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protected void throwSetIllegalArgumentException(String attemptedType,
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String attemptedValue) {
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throw new IllegalArgumentException(getSetMessage(attemptedType,attemptedValue));
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}
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protected void throwSetIllegalArgumentException(Object o) {
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throwSetIllegalArgumentException(o != null ? o.getClass().getName() : "", "");
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}
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protected void throwSetIllegalArgumentException(boolean b) {
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throwSetIllegalArgumentException("boolean", Boolean.toString(b));
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}
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protected void throwSetIllegalArgumentException(byte b) {
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throwSetIllegalArgumentException("byte", Byte.toString(b));
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}
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protected void throwSetIllegalArgumentException(char c) {
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throwSetIllegalArgumentException("char", Character.toString(c));
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}
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protected void throwSetIllegalArgumentException(short s) {
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throwSetIllegalArgumentException("short", Short.toString(s));
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}
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protected void throwSetIllegalArgumentException(int i) {
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throwSetIllegalArgumentException("int", Integer.toString(i));
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}
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protected void throwSetIllegalArgumentException(long l) {
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throwSetIllegalArgumentException("long", Long.toString(l));
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}
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protected void throwSetIllegalArgumentException(float f) {
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throwSetIllegalArgumentException("float", Float.toString(f));
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}
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protected void throwSetIllegalArgumentException(double d) {
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throwSetIllegalArgumentException("double", Double.toString(d));
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}
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}
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