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Posted to dev@commons.apache.org by rs...@apache.org on 2002/08/23 02:15:26 UTC
cvs commit: jakarta-commons/discovery/src/java/org/apache/commons/discovery/jdk JDK11Hooks.java PsuedoSystemClassLoader.java JDKHooks.java JDK12Hooks.java
rsitze 2002/08/22 17:15:26
Added: discovery/src/java/org/apache/commons/discovery/jdk
JDK11Hooks.java PsuedoSystemClassLoader.java
JDKHooks.java JDK12Hooks.java
Log:
Oops.. forgot to drop this with the other changes..
Revision Changes Path
1.1 jakarta-commons/discovery/src/java/org/apache/commons/discovery/jdk/JDK11Hooks.java
Index: JDK11Hooks.java
===================================================================
/*
* $Header$
* $Revision$
* $Date$
*
* ====================================================================
*
* The Apache Software License, Version 1.1
*
* Copyright (c) 1999-2002 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 acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Commons", 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 names without prior written
* permission of the Apache Group.
*
* 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.commons.discovery.jdk;
import java.util.Enumeration;
import java.io.IOException;
/**
* @author Richard A. Sitze
*/
class JDK11Hooks extends JDKHooks {
private static final ClassLoader systemClassLoader
= new PsuedoSystemClassLoader();
/**
* The thread context class loader is available for JDK 1.2
* or later, if certain security conditions are met.
*
* @return The thread context class loader, if available.
* Otherwise return null.
*/
public ClassLoader getThreadContextClassLoader() {
return null;
}
/**
* The system class loader is available for JDK 1.2
* or later, if certain security conditions are met.
*
* @return The system class loader, if available.
* Otherwise return null.
*/
public ClassLoader getSystemClassLoader() {
return systemClassLoader;
}
/**
* Implement ClassLoader.getResources for JDK 1.1
*
* On JDK1.1 there is no getResources() method. We emulate this by
* using introspection and doing the lookup ourself, using the list
* of URLs, via getURLs().
*/
public Enumeration getResources(ClassLoader loader,
String resourceName)
throws IOException
{
/**
* Not yet implemented...
*/
return null;
}
}
1.1 jakarta-commons/discovery/src/java/org/apache/commons/discovery/jdk/PsuedoSystemClassLoader.java
Index: PsuedoSystemClassLoader.java
===================================================================
/*
* $Header$
* $Revision$
* $Date$
*
* ====================================================================
*
* The Apache Software License, Version 1.1
*
* Copyright (c) 1999-2002 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 acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Commons", 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 names without prior written
* permission of the Apache Group.
*
* 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.commons.discovery.jdk;
import java.io.InputStream;
import java.net.URL;
/**
* JDK 1.1.x compatible?
* There is no direct way to get the system class loader
* in 1.1.x, but this should be a good work around...
*/
class PsuedoSystemClassLoader extends ClassLoader {
protected Class loadClass(String className, boolean resolve)
throws ClassNotFoundException
{
return findSystemClass(className);
}
public URL getResource(String resName) {
return getSystemResource(resName);
}
public InputStream getResourceAsStream(String resName) {
return getSystemResourceAsStream(resName);
}
}
1.1 jakarta-commons/discovery/src/java/org/apache/commons/discovery/jdk/JDKHooks.java
Index: JDKHooks.java
===================================================================
/*
* $Header$
* $Revision$
* $Date$
*
* ====================================================================
*
* The Apache Software License, Version 1.1
*
* Copyright (c) 1999-2002 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 acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Commons", 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 names without prior written
* permission of the Apache Group.
*
* 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.commons.discovery.jdk;
import java.util.Enumeration;
import java.io.IOException;
/**
* @author Richard A. Sitze
*/
public abstract class JDKHooks {
private static final JDKHooks jdkHooks;
static {
jdkHooks = new JDK12Hooks();
}
protected JDKHooks() { }
/**
* Return singleton object representing JVM hooks/tools.
*
* TODO: add logic to detect JDK level.
*/
public static final JDKHooks getJDKHooks() {
return jdkHooks;
}
/**
* The thread context class loader is available for JDK 1.2
* or later, if certain security conditions are met.
*
* @return The thread context class loader, if available.
* Otherwise return null.
*/
public abstract ClassLoader getThreadContextClassLoader();
/**
* The system class loader is available for JDK 1.2
* or later, if certain security conditions are met.
*
* @return The system class loader, if available.
* Otherwise return null.
*/
public abstract ClassLoader getSystemClassLoader();
public abstract Enumeration getResources(ClassLoader loader,
String resourceName)
throws IOException;
}
1.1 jakarta-commons/discovery/src/java/org/apache/commons/discovery/jdk/JDK12Hooks.java
Index: JDK12Hooks.java
===================================================================
/*
* $Header$
* $Revision$
* $Date$
*
* ====================================================================
*
* The Apache Software License, Version 1.1
*
* Copyright (c) 1999-2002 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 acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Commons", 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 names without prior written
* permission of the Apache Group.
*
* 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.commons.discovery.jdk;
import java.util.Enumeration;
import java.io.IOException;
/**
* @author Richard A. Sitze
*/
class JDK12Hooks extends JDKHooks {
/**
* The thread context class loader is available for JDK 1.2
* or later, if certain security conditions are met.
*
* @return The thread context class loader, if available.
* Otherwise return null.
*/
public ClassLoader getThreadContextClassLoader() {
ClassLoader classLoader;
try {
classLoader = Thread.currentThread().getContextClassLoader();
} catch (SecurityException e) {
/**
* SecurityException is thrown when
* a) the context class loader isn't an ancestor of the
* calling class's class loader, or
* b) if security permissions are restricted.
*
* For (a), ignore and keep going. We cannot help but also
* ignore (b) with the logic below, but other calls elsewhere
* (to obtain a class loader) will re-trigger this exception
* where we can make a distinction.
*/
classLoader = null; // ignore
}
// Return the selected class loader
return classLoader;
}
/**
* The system class loader is available for JDK 1.2
* or later, if certain security conditions are met.
*
* @return The system class loader, if available.
* Otherwise return null.
*/
public ClassLoader getSystemClassLoader() {
ClassLoader classLoader;
try {
classLoader = ClassLoader.getSystemClassLoader();
} catch (SecurityException e) {
/**
* Ignore and keep going.
*/
classLoader = null; // ignore
}
// Return the selected class loader
return classLoader;
}
/**
* Implement ClassLoader.getResources for JDK 1.1
*/
public Enumeration getResources(ClassLoader loader,
String resourceName)
throws IOException
{
return loader.getResources(resourceName);
}
}
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