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package org.eclipse.pde.internal.core;
import java.io.IOException;
import java.net.URL;
import java.util.Arrays;
import java.util.Comparator;
import java.util.HashMap;
import java.util.Map;
import org.eclipse.core.runtime.FileLocator;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.IExtension;
import org.eclipse.core.runtime.IExtensionDelta;
import org.eclipse.core.runtime.IExtensionRegistry;
import org.eclipse.core.runtime.IRegistryChangeEvent;
import org.eclipse.core.runtime.IRegistryChangeListener;
import org.eclipse.core.runtime.Platform;
import org.osgi.framework.Bundle;
public class TargetDefinitionManager implements IRegistryChangeListener{
Map fTargets;
private static String[] attributes;
{
attributes = new String[] {"id", "name" }; //$NON-NLS-1$ //$NON-NLS-2$
}
public void registryChanged(IRegistryChangeEvent event) {
IExtensionDelta[] deltas = event.getExtensionDeltas();
for (int i = 0; i < deltas.length; i++) {
IExtension extension = deltas[i].getExtension();
String extensionId = extension.getExtensionPointUniqueIdentifier();
if (extensionId.equals("org.eclipse.pde.core.targets")) { //$NON-NLS-1$
IConfigurationElement[] elems = extension.getConfigurationElements();
if (deltas[i].getKind() == IExtensionDelta.ADDED)
add(elems);
else
remove(elems);
}
}
}
public IConfigurationElement[] getTargets() {
if (fTargets == null)
loadElements();
return (IConfigurationElement[])fTargets.values().toArray(new IConfigurationElement[fTargets.size()]);
}
public IConfigurationElement[] getSortedTargets() {
if (fTargets == null)
loadElements();
IConfigurationElement[] result = (IConfigurationElement[])fTargets.values().toArray(new IConfigurationElement[fTargets.size()]);
Arrays.sort(result, new Comparator() {
public int compare(Object o1, Object o2) {
String value1 = getString((IConfigurationElement)o1);
String value2 = getString((IConfigurationElement)o2);
return value1.compareTo(value2);
}
private String getString(IConfigurationElement elem){
String name = elem.getAttribute("name"); //$NON-NLS-1$
String id = elem.getAttribute("id"); //$NON-NLS-1$
name = name + " [" + id + "]"; //$NON-NLS-1$ //$NON-NLS-2$
return name;
}
});
return result;
}
public IConfigurationElement getTarget(String id) {
if (fTargets == null)
loadElements();
return (IConfigurationElement)fTargets.get(id);
}
private void loadElements() {
fTargets = new HashMap();
IExtensionRegistry registry = Platform.getExtensionRegistry();
registry.addRegistryChangeListener(this);
IConfigurationElement[] elements = registry.getConfigurationElementsFor("org.eclipse.pde.core.targets"); //$NON-NLS-1$
add(elements);
}
private boolean isValid (IConfigurationElement elem) {
String value;
for (int i = 0; i < attributes.length; i++) {
value = elem.getAttribute(attributes[i]);
if (value == null || value.equals("")) //$NON-NLS-1$
return false;
}
value = elem.getAttribute("definition"); //$NON-NLS-1$
String symbolicName = elem.getDeclaringExtension().getNamespaceIdentifier();
URL url = getResourceURL(symbolicName, value);
try {
if (url != null && url.openStream().available() > 0)
return true;
} catch (IOException e) {
// file does not exist
}
return false;
}
public static URL getResourceURL(String bundleID, String resourcePath) {
try {
Bundle bundle = Platform.getBundle(bundleID);
if (bundle != null && resourcePath != null) {
URL entry = bundle.getEntry(resourcePath);
if (entry != null)
return FileLocator.toFileURL(entry);
}
} catch (IOException e) {
}
return null;
}
private void add(IConfigurationElement[] elems) {
for (int i = 0; i < elems.length; i++) {
IConfigurationElement elem = elems[i];
if (isValid(elem)) {
String id = elem.getAttribute("id"); //$NON-NLS-1$
fTargets.put(id, elem);
}
}
}
private void remove(IConfigurationElement[] elems) {
for (int i = 0 ; i < elems.length; i++) {
fTargets.remove(elems[i].getAttribute("id")); //$NON-NLS-1$
}
}
public void shutdown() {
IExtensionRegistry registry = Platform.getExtensionRegistry();
registry.removeRegistryChangeListener(this);
}
}
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