/* * Copyright (c) 2001, 2005, 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.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));    } }