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Diffstat (limited to 'libjava/classpath/gnu/java/lang/InstrumentationImpl.java')
| -rw-r--r-- | libjava/classpath/gnu/java/lang/InstrumentationImpl.java | 241 |
1 files changed, 0 insertions, 241 deletions
diff --git a/libjava/classpath/gnu/java/lang/InstrumentationImpl.java b/libjava/classpath/gnu/java/lang/InstrumentationImpl.java deleted file mode 100644 index a601baf..0000000 --- a/libjava/classpath/gnu/java/lang/InstrumentationImpl.java +++ /dev/null @@ -1,241 +0,0 @@ -/* InstrumentationImpl.java -- GNU implementation of - java.lang.instrument.Instrumentation - Copyright (C) 2005, 2006 Free Software Foundation, Inc. - -This file is part of GNU Classpath. - -GNU Classpath is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2, or (at your option) -any later version. - -GNU Classpath 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 for more details. - -You should have received a copy of the GNU General Public License -along with GNU Classpath; see the file COPYING. If not, write to the -Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA -02110-1301 USA. - -Linking this library statically or dynamically with other modules is -making a combined work based on this library. Thus, the terms and -conditions of the GNU General Public License cover the whole -combination. - -As a special exception, the copyright holders of this library give you -permission to link this library with independent modules to produce an -executable, regardless of the license terms of these independent -modules, and to copy and distribute the resulting executable under -terms of your choice, provided that you also meet, for each linked -independent module, the terms and conditions of the license of that -module. An independent module is a module which is not derived from -or based on this library. If you modify this library, you may extend -this exception to your version of the library, but you are not -obligated to do so. If you do not wish to do so, delete this -exception statement from your version. */ - - -package gnu.java.lang; - -import java.lang.instrument.Instrumentation; -import java.lang.instrument.ClassFileTransformer; -import java.lang.instrument.ClassDefinition; -import java.lang.instrument.UnmodifiableClassException; -import java.lang.instrument.IllegalClassFormatException; - -import java.security.ProtectionDomain; - -import java.util.ArrayList; -import java.util.Iterator; - -/** - * An Instrumentation object has transformers that will - * be called each time a class is defined or redefined. - * The object is given to a <code>premain</code> function - * that is called before the <code>main</code> function. - * - * @author Nicolas Geoffray (nicolas.geoffray@menlina.com) - * @since 1.5 - */ -public final class InstrumentationImpl implements Instrumentation -{ - - /* List of transformers */ - private ArrayList<ClassFileTransformer> transformers = - new ArrayList<ClassFileTransformer>(); - - - InstrumentationImpl() - { - } - - /** - * Adds a <code>ClassFileTransformer</class> object - * to the instrumentation. Each time a class is defined - * or redefined, the <code>transform</code> method of the - * <code>transformer</code> object is called. - * - * @param transformer the transformer to add - * @throws NullPointerException if transformer is null - */ - public void addTransformer(ClassFileTransformer transformer) - { - if (transformer == null) - throw new NullPointerException(); - synchronized(transformers) - { - transformers.add(transformer); - } - } - - /** - * Removes the given transformer from the set of transformers - * this Instrumentation object has. - * - * @param transformer the transformer to remove - * @return true if the transformer was found and removed, false if - * the transformer was not found - * @throws NullPointerException if transformer is null - */ - public boolean removeTransformer(ClassFileTransformer transformer) - { - if (transformer == null) - throw new NullPointerException(); - - boolean result; - synchronized (transformers) - { - result = transformers.remove(transformer); - } - return result; - } - - /** - * Returns if the current JVM supports class redefinition - * - * @return true if the current JVM supports class redefinition - */ - public boolean isRedefineClassesSupported() - { - return VMInstrumentationImpl.isRedefineClassesSupported(); - } - - /** - * Redefine classes present in the definitions array, with - * the corresponding class files. - * - * @param definitions an array of classes to redefine - * - * @throws ClassNotFoundException if a class cannot be found - * @throws UnmodifiableClassException if a class cannot be modified - * @throws UnsupportedOperationException if the JVM does not support - * redefinition or the redefinition made unsupported changes - * @throws ClassFormatError if a class file is not valid - * @throws NoClassDefFoundError if a class name is not equal to the name - * in the class file specified - * @throws UnsupportedClassVersionError if the class file version numbers - * are unsupported - * @throws ClassCircularityError if circularity occured with the new - * classes - * @throws LinkageError if a linkage error occurs - * @throws NullPointerException if the definitions array is null, or any - * of its element - * - * @see isRedefineClassesSupported() - * @see addTransformer(java.lang.instrument.ClassFileTransformer) - * @see ClassFileTransformer - */ - public void redefineClasses(ClassDefinition[] definitions) - throws ClassNotFoundException, - UnmodifiableClassException - { - if (!isRedefineClassesSupported()) - throw new UnsupportedOperationException(); - - VMInstrumentationImpl.redefineClasses(this, definitions); - } - - - /** - * Get all the classes loaded by the JVM. - * - * @return an array containing all the classes loaded by the JVM. The array - * is empty if no class is loaded. - */ - public Class[] getAllLoadedClasses() - { - return VMInstrumentationImpl.getAllLoadedClasses(); - } - - /** - * Get all the classes loaded by a given class loader - * - * @param loader the loader - * - * @return an array containing all the classes loaded by the given loader. - * The array is empty if no class was loaded by the loader. - */ - public Class[] getInitiatedClasses(ClassLoader loader) - { - return VMInstrumentationImpl.getInitiatedClasses(loader); - } - - /** - * Get the size of an object. - * - * @param objectToSize the object - * @return the size of the object - * @throws NullPointerException if objectToSize is null. - */ - public long getObjectSize(Object objectToSize) - { - // We alleviate the VM work - if (objectToSize == null) - throw new NullPointerException(); - return VMInstrumentationImpl.getObjectSize(objectToSize); - } - - /** - * Called by the VM or redefineClasses to call each transformer - * - * @param loader the loader of the class - * @param className the name of the class with packages separated with "/" - * @param classBeingRedefined the class being redefined if it's the case, - * null otherwise - * @param protectionDomain the protection domain of the class being defined - * or redefined - * @param classfileBuffer the input byte buffer in class file format - * - * @return the new class file - */ - public byte[] callTransformers(ClassLoader loader, String className, - Class<?> classBeingRedefined, ProtectionDomain protectionDomain, - byte[] classfileBuffer) - { - byte[] newBuffer = null; - byte[] oldBuffer = classfileBuffer; - ClassFileTransformer current; - synchronized (transformers) - { - Iterator<ClassFileTransformer> i = transformers.iterator(); - while (i.hasNext()) - { - current = i.next(); - try - { - newBuffer = current.transform(loader, className, - classBeingRedefined, protectionDomain, oldBuffer); - } - catch (IllegalClassFormatException ignored) - { - //IGNORED - } - if (newBuffer != null) - oldBuffer = newBuffer; - } - } - return oldBuffer; - } -} |