/*
* The Apache Software License, Version 1.1
*
*
* Copyright (c) 2001 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Axis" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
package org.apache.axis.utils ;
import java.io.* ;
import java.util.Hashtable ;
import org.apache.axis.utils.cache.JavaClass ;
/**
* This allows us to specify that certain classes, the ones we register
* using the registerClass method, should be loaded using this class
* loader - all others use the system default one.
* This was added so that the *.jws processor can reload classes
* that have already been loaded once - when the java file changes.
*
* @author Doug Davis (dug@us.ibm.com)
*/
public class AxisClassLoader extends ClassLoader {
static Hashtable classLoaders = new Hashtable();
Hashtable classCache = new Hashtable() ;
public AxisClassLoader() {
super(Thread.currentThread().getContextClassLoader());
}
static synchronized public AxisClassLoader getClassLoader() {
ClassLoader baseCL = Thread.currentThread().getContextClassLoader();
AxisClassLoader cl = null ;
cl = (AxisClassLoader) classLoaders.get( baseCL );
if ( cl == null )
classLoaders.put( baseCL, cl = new AxisClassLoader() );
return( cl );
}
static public void removeClassLoader(String name) {
if ( name != null )
classLoaders.remove( name );
}
public void registerClass( String name, String classFile )
throws FileNotFoundException, IOException
{
/* Load the class file the *.class file */
/****************************************/
FileInputStream fis = new FileInputStream( classFile );
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte buf[] = new byte[1024];
for(int i = 0; (i = fis.read(buf)) != -1; )
baos.write(buf, 0, i);
fis.close();
baos.close();
/* Create a new Class object from it */
/*************************************/
byte[] data = baos.toByteArray();
Class cls = defineClass( name, data, 0, data.length );
/* And finally register it */
/***************************/
registerClass( name, cls );
}
public synchronized void registerClass( String name, Class cls ) {
/* And finally register it */
/***************************/
JavaClass oldClass = (JavaClass)classCache.get(name);
if (oldClass!=null && oldClass.getJavaClass()==cls) return;
classCache.put( name, new JavaClass(cls) );
}
public synchronized void deregisterClass( String name ) {
/* Deregister the passed in className */
/**************************************/
classCache.remove( name);
}
public boolean isClassRegistered( String name ) {
return( classCache != null && classCache.get(name) != null );
}
public Class loadClass(String name) throws ClassNotFoundException {
Object obj ;
/* Check the classCache for the className - if there just return */
/* the class - if not there use the default class loader. */
/*****************************************************************/
if ( classCache != null ) {
obj = classCache.get( name );
if ( obj != null )
return( ((JavaClass)obj).getJavaClass() );
}
Class cls = super.loadClass( name );
registerClass( name, cls );
return cls;
}
/**
* Find the cached JavaClass entry for this class, creating one
* if necessary.
* @param className name of the class desired
* @return JavaClass entry
*/
public JavaClass lookup(String className) throws ClassNotFoundException {
JavaClass jc = (JavaClass) classCache.get( className );
if ( jc == null ) {
loadClass( className );
jc = (JavaClass) classCache.get( className );
}
return jc;
}
};