author | alanb |
Fri, 02 Nov 2012 15:50:11 +0000 | |
changeset 14342 | 8435a30053c1 |
parent 10342 | ca0984bc9d32 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2001, 2011, 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 long 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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if (Modifier.isStatic(field.getModifiers())) |
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fieldOffset = unsafe.staticFieldOffset(field); |
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else |
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fieldOffset = unsafe.objectFieldOffset(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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} |