Activator.java
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/*
* Decompiled with CFR 0_118.
*
* Could not load the following classes:
* org.osgi.framework.Bundle
* org.osgi.framework.BundleActivator
* org.osgi.framework.BundleContext
* org.osgi.framework.BundleEvent
* org.osgi.framework.BundleListener
*/
package com.day.image.internal;
import com.day.image.ImageSupport;
import org.osgi.framework.*;
import javax.imageio.spi.*;
import java.io.IOException;
import java.net.URL;
import java.util.*;
/*
* This class specifies class file version 49.0 but uses Java 6 signatures. Assumed Java 6.
*/
public class Activator
implements BundleActivator,
BundleListener {
private static final String SERVICES_FOLDER = "META-INF/services/";
private Map<Long, List<Object>> perBundleProvider = new HashMap<Long, List<Object>>();
public void start(BundleContext context) {
ImageSupport.registerImageIOSpi();
for (Bundle bundle : context.getBundles()) {
if (bundle.getState() != 32) continue;
this.registerImageIOProvider(bundle);
}
context.addBundleListener((BundleListener)this);
}
public void stop(BundleContext context) {
context.removeBundleListener((BundleListener)this);
IIORegistry reg = IIORegistry.getDefaultInstance();
for (List<Object> providers : this.perBundleProvider.values()) {
this.unregisterImageIOProvider(reg, providers);
}
ImageSupport.deregisterImageIOSpi();
}
public void bundleChanged(BundleEvent event) {
switch (event.getType()) {
case 2: {
this.registerImageIOProvider(event.getBundle());
break;
}
case 4: {
this.unregisterImageIOProvider(event.getBundle());
}
}
}
private void registerImageIOProvider(Bundle bundle) {
BundleProxyClassLoader loader = new BundleProxyClassLoader(bundle);
ArrayList<Object> providers = new ArrayList<Object>();
this.loadProviders(providers, loader, ImageInputStreamSpi.class);
this.loadProviders(providers, loader, ImageOutputStreamSpi.class);
this.loadProviders(providers, loader, ImageReaderSpi.class);
this.loadProviders(providers, loader, ImageWriterSpi.class);
if (!providers.isEmpty()) {
IIORegistry reg = IIORegistry.getDefaultInstance();
this.registerImageIOProvider(reg, providers);
this.perBundleProvider.put(bundle.getBundleId(), providers);
}
}
private void unregisterImageIOProvider(Bundle bundle) {
IIORegistry reg = IIORegistry.getDefaultInstance();
List<Object> providers = this.perBundleProvider.remove(bundle.getBundleId());
if (providers != null) {
this.unregisterImageIOProvider(reg, providers);
}
}
private void registerImageIOProvider(IIORegistry reg, List<Object> providers) {
reg.registerServiceProviders(providers.iterator());
}
private void unregisterImageIOProvider(IIORegistry reg, List<Object> providers) {
for (Object provider : providers) {
reg.deregisterServiceProvider(provider);
}
}
/*
* WARNING - Removed try catching itself - possible behaviour change.
*/
private <T> void loadProviders(List<Object> providers, BundleProxyClassLoader bundleLoader, Class<T> spiClass) {
String entryName = "META-INF/services/" + spiClass.getName();
if (bundleLoader.hasResource(entryName)) {
ClassLoader old = Thread.currentThread().getContextClassLoader();
try {
Thread.currentThread().setContextClassLoader(bundleLoader);
Iterator<T> spi = ServiceRegistry.lookupProviders(spiClass, bundleLoader);
while (spi.hasNext()) {
try {
providers.add(spi.next());
}
catch (Throwable t) {
System.err.println(t);
t.printStackTrace(System.err);
}
}
}
finally {
Thread.currentThread().setContextClassLoader(old);
}
}
}
/*
* This class specifies class file version 49.0 but uses Java 6 signatures. Assumed Java 6.
*/
private static class BundleProxyClassLoader
extends ClassLoader {
private final Bundle bundle;
public BundleProxyClassLoader(Bundle bundle) {
this.bundle = bundle;
}
@Override
protected synchronized Class<?> loadClass(String name, boolean resolve) throws ClassNotFoundException {
return this.bundle.loadClass(name);
}
@Override
public URL getResource(String name) {
return this.bundle.getResource(name);
}
@Override
public Enumeration<URL> getResources(String name) throws IOException {
return this.bundle.getResources(name);
}
boolean hasResource(String name) {
return this.bundle.getResource(name) != null;
}
}
}