HHH-15598 Remove InstrumentedClassLoader, demote ByteCodeHelper to test helper
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/*
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* Hibernate, Relational Persistence for Idiomatic Java
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*
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* License: GNU Lesser General Public License (LGPL), version 2.1 or later.
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* See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
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*/
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package org.hibernate.bytecode.spi;
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import java.io.InputStream;
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/**
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* A specialized ClassLoader which performs bytecode enhancement on class definitions as they are loaded
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* into the ClassLoader scope.
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*
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* @author Emmanuel Bernard
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* @author Steve Ebersole
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*/
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public class InstrumentedClassLoader extends ClassLoader {
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private final ClassTransformer classTransformer;
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/**
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* Constructs an InstrumentedClassLoader.
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*
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* @param parent The parent ClassLoader
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* @param classTransformer The transformer to use for applying enhancement
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*/
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public InstrumentedClassLoader(ClassLoader parent, ClassTransformer classTransformer) {
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super( parent );
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this.classTransformer = classTransformer;
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}
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@Override
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public Class loadClass(String name) throws ClassNotFoundException {
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if ( name.startsWith( "java." ) || classTransformer == null ) {
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return getParent().loadClass( name );
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}
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final Class c = findLoadedClass( name );
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if ( c != null ) {
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return c;
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}
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final InputStream is = this.getResourceAsStream( name.replace( '.', '/' ) + ".class" );
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if ( is == null ) {
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throw new ClassNotFoundException( name + " not found" );
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}
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try {
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final byte[] originalBytecode = ByteCodeHelper.readByteCode( is );
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final byte[] transformedBytecode = classTransformer.transform( getParent(), name, null, null, originalBytecode );
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if ( transformedBytecode == null ) {
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// no transformations took place, so handle it as we would a
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// non-instrumented class
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return getParent().loadClass( name );
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}
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else {
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return defineClass( name, transformedBytecode, 0, transformedBytecode.length );
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}
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}
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catch ( Throwable t ) {
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throw new ClassNotFoundException( name + " not found", t );
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}
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}
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}
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