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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/java/lang/instrument/Instrumentation.java | |
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Diffstat (limited to 'libjava/classpath/java/lang/instrument/Instrumentation.java')
-rw-r--r-- | libjava/classpath/java/lang/instrument/Instrumentation.java | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/libjava/classpath/java/lang/instrument/Instrumentation.java b/libjava/classpath/java/lang/instrument/Instrumentation.java new file mode 100644 index 000000000..42e3ab5be --- /dev/null +++ b/libjava/classpath/java/lang/instrument/Instrumentation.java @@ -0,0 +1,139 @@ +/* Instrumentation.java -- Implementation of this interface is used to + instrument Java bytecode. + Copyright (C) 2005 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 java.lang.instrument; + +/** + * 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 interface Instrumentation +{ + + /** + * 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 + */ + void addTransformer(ClassFileTransformer 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 + */ + boolean removeTransformer(ClassFileTransformer transformer); + + /** + * Returns if the current JVM supports class redefinition + * + * @return true if the current JVM supports class redefinition + */ + boolean 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 + */ + void redefineClasses(ClassDefinition[] definitions) + throws ClassNotFoundException, + UnmodifiableClassException; + + + /** + * 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. + */ + Class[] 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. + */ + Class[] getInitiatedClasses(ClassLoader loader); + + /** + * Get the size of an object. It contains the size of all fields. + * + * @param objectToSize the object + * @return the size of the object + * @throws NullPointerException if objectToSize is null. + */ + long getObjectSize(Object objectToSize); +} |