/*******************************************************************************
* Copyright (c) 2005, 2009 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.osgi.baseadaptor.loader;
import java.security.ProtectionDomain;
import org.eclipse.osgi.baseadaptor.BaseData;
import org.eclipse.osgi.baseadaptor.bundlefile.BundleFile;
import org.eclipse.osgi.framework.util.KeyedElement;
import org.eclipse.osgi.framework.util.KeyedHashSet;
/**
* A ClasspathEntry contains a single <code>BundleFile</code> which is used as
* a source to load classes and resources from, and a single
* <code>ProtectionDomain</code> which is used as the domain to define classes
* loaded from this ClasspathEntry.
* @since 3.2
*/
public class ClasspathEntry {
private final BundleFile bundlefile;
private final ProtectionDomain domain;
private KeyedHashSet userObjects = null;
// Note that PDE has internal dependency on this field type/name (bug 267238)
private volatile BaseData data;
/**
* Constructs a ClasspathElement with the specified bundlefile and domain
* @param bundlefile A BundleFile object which acts as a source
* @param domain the ProtectDomain for all code loaded from this classpath element
*/
public ClasspathEntry(BundleFile bundlefile, ProtectionDomain domain) {
this.bundlefile = bundlefile;
this.domain = domain;
}
/**
* Returns the source BundleFile for this classpath entry
* @return the source BundleFile for this classpath entry
*/
public BundleFile getBundleFile() {
return bundlefile;
}
/**
* Returns the base data which this entry is associated with. This can be
* either a host or fragment base data.
*/
public BaseData getBaseData() {
return data;
}
void setBaseData(BaseData data) {
this.data = data;
}
/**
* Returns the ProtectionDomain for this classpath entry
* @return the ProtectionDomain for this classpath entry
*/
public ProtectionDomain getDomain() {
return domain;
}
/**
* Returns a user object which is keyed by the specified key
* @param key the key of the user object to get
* @return a user object which is keyed by the specified key
*/
public Object getUserObject(Object key) {
if (userObjects == null)
return null;
synchronized (userObjects) {
return userObjects.getByKey(key);
}
}
/**
* Adds a user object
* @param userObject the user object to add
*/
public synchronized void addUserObject(KeyedElement userObject) {
if (userObjects == null)
userObjects = new KeyedHashSet(5, false);
synchronized (userObjects) {
userObjects.add(userObject);
}
}
}