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/*******************************************************************************
* Copyright (c) 2008, 2013 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.equinox.internal.transforms;
import java.io.IOException;
import org.eclipse.osgi.internal.framework.EquinoxContainer;
import org.eclipse.osgi.internal.hookregistry.*;
import org.eclipse.osgi.internal.log.EquinoxLogServices;
import org.eclipse.osgi.storage.BundleInfo.Generation;
import org.eclipse.osgi.storage.bundlefile.BundleFile;
import org.eclipse.osgi.storage.bundlefile.BundleFileWrapper;
import org.osgi.framework.*;
/**
* The framework extension that is capable of applying transforms to bundle content.
*/
public class TransformerHook implements BundleFileWrapperFactoryHook, HookConfigurator, ActivatorHookFactory, BundleActivator {
private volatile TransformerList transformers;
private volatile TransformInstanceListData templates;
private EquinoxLogServices logServices;
/**
* @throws IOException
*/
public BundleFileWrapper wrapBundleFile(BundleFile bundleFile, Generation generation, boolean base) {
if (transformers == null || templates == null)
return null;
return new TransformedBundleFile(this, generation, bundleFile);
}
public void addHooks(HookRegistry hookRegistry) {
hookRegistry.addActivatorHookFactory(this);
hookRegistry.addBundleFileWrapperFactoryHook(this);
logServices = hookRegistry.getContainer().getLogServices();
}
public void start(BundleContext context) throws BundleException {
try {
this.transformers = new TransformerList(context, logServices);
} catch (InvalidSyntaxException e) {
throw new BundleException("Problem registering service tracker: transformers", e); //$NON-NLS-1$
}
try {
this.templates = new TransformInstanceListData(context, logServices);
} catch (InvalidSyntaxException e) {
transformers.close();
transformers = null;
throw new BundleException("Problem registering service tracker: templates", e); //$NON-NLS-1$
}
}
public void stop(BundleContext context) {
transformers.close();
templates.close();
}
void log(int severity, String msg, Throwable t) {
if (logServices == null) {
System.err.println(msg);
t.printStackTrace();
return;
}
logServices.log(EquinoxContainer.NAME, severity, msg, t);
}
public BundleActivator createActivator() {
return this;
}
public String[] getTransformTypes() {
TransformInstanceListData current = templates;
return current == null ? new String[0] : current.getTransformTypes();
}
public StreamTransformer getTransformer(String type) {
TransformerList current = transformers;
return current == null ? null : current.getTransformer(type);
}
public TransformTuple[] getTransformsFor(String type) {
TransformInstanceListData current = templates;
return current == null ? null : current.getTransformsFor(type);
}
public boolean hasTransformers() {
TransformerList current = transformers;
return current == null ? false : current.hasTransformers();
}
public boolean hasTransformsFor(Bundle bundle) {
TransformInstanceListData current = templates;
return current == null ? false : current.hasTransformsFor(bundle);
}
}
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