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/*******************************************************************************
* Copyright (c) 2005-2007 Cognos Incorporated, 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:
* Cognos Incorporated - initial API and implementation
* IBM Corporation - bug fixes and enhancements
*******************************************************************************/
package org.eclipse.equinox.http.registry.internal;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.core.runtime.*;
import org.osgi.framework.*;
public class ResourceManager implements ExtensionPointTracker.Listener {
private static final String RESOURCES_EXTENSION_POINT = "org.eclipse.equinox.http.registry.resources"; //$NON-NLS-1$
private static final String HTTPCONTEXT_NAME = "httpcontext-name"; //$NON-NLS-1$
private static final String BASE_NAME = "base-name"; //$NON-NLS-1$
private static final String ALIAS = "alias"; //$NON-NLS-1$
private static final String RESOURCE = "resource"; //$NON-NLS-1$
private static final String HTTPCONTEXT_ID = "httpcontextId"; //$NON-NLS-1$
private static final String SERVICESELECTOR = "serviceSelector"; //$NON-NLS-1$
private static final String CLASS = "class"; //$NON-NLS-1$
private static final String FILTER = "filter"; //$NON-NLS-1$
private ExtensionPointTracker tracker;
private List registered = new ArrayList();
private HttpRegistryManager httpRegistryManager;
private ServiceReference reference;
public ResourceManager(HttpRegistryManager httpRegistryManager, ServiceReference reference, IExtensionRegistry registry) {
this.httpRegistryManager = httpRegistryManager;
this.reference = reference;
tracker = new ExtensionPointTracker(registry, RESOURCES_EXTENSION_POINT, this);
}
public void start() {
tracker.open();
}
public void stop() {
tracker.close();
}
public void added(IExtension extension) {
IConfigurationElement[] elements = extension.getConfigurationElements();
for (int i = 0; i < elements.length; i++) {
IConfigurationElement serviceSelectorElement = elements[i];
if (!SERVICESELECTOR.equals(serviceSelectorElement.getName()))
continue;
org.osgi.framework.Filter serviceSelector = null;
String clazz = serviceSelectorElement.getAttribute(CLASS);
if (clazz != null) {
try {
serviceSelector = (org.osgi.framework.Filter) serviceSelectorElement.createExecutableExtension(CLASS);
} catch (CoreException e) {
// log it.
e.printStackTrace();
return;
}
} else {
String filter = serviceSelectorElement.getAttribute(FILTER);
if (filter == null)
return;
try {
serviceSelector = FrameworkUtil.createFilter(filter);
} catch (InvalidSyntaxException e) {
// log it.
e.printStackTrace();
return;
}
}
if (! serviceSelector.match(reference))
return;
break;
}
for (int i = 0; i < elements.length; i++) {
IConfigurationElement resourceElement = elements[i];
if (!RESOURCE.equals(resourceElement.getName()))
continue;
String alias = resourceElement.getAttribute(ALIAS);
if (alias == null)
continue; // alias is mandatory - ignore this.
String baseName = resourceElement.getAttribute(BASE_NAME);
if (baseName == null)
baseName = ""; //$NON-NLS-1$
String httpContextId = resourceElement.getAttribute(HTTPCONTEXT_ID);
if (httpContextId == null) {
httpContextId = resourceElement.getAttribute(HTTPCONTEXT_NAME);
}
if (httpContextId != null && httpContextId.indexOf('.') == -1)
httpContextId = resourceElement.getNamespaceIdentifier() + "." + httpContextId; //$NON-NLS-1$
if (httpRegistryManager.addResourcesContribution(alias, baseName, httpContextId, extension.getContributor()))
registered.add(resourceElement);
}
}
public void removed(IExtension extension) {
IConfigurationElement[] elements = extension.getConfigurationElements();
for (int i = 0; i < elements.length; i++) {
IConfigurationElement resourceElement = elements[i];
if (registered.remove(resourceElement)) {
String alias = resourceElement.getAttribute(ALIAS);
httpRegistryManager.removeContribution(alias);
}
}
}
}
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