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/*******************************************************************************
* Copyright (c) 2008, 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.equinox.internal.p2.engine;
import java.util.HashMap;
import java.util.Map;
import org.eclipse.core.runtime.*;
import org.eclipse.equinox.internal.p2.core.helpers.LogHelper;
import org.eclipse.equinox.p2.engine.spi.ProvisioningAction;
import org.eclipse.equinox.p2.engine.spi.Touchpoint;
import org.eclipse.equinox.p2.metadata.ITouchpointType;
import org.eclipse.equinox.p2.metadata.VersionRange;
import org.eclipse.osgi.util.NLS;
public class ActionManager implements IRegistryChangeListener {
private static final String PT_ACTIONS = "actions"; //$NON-NLS-1$
private static final String ELEMENT_ACTION = "action"; //$NON-NLS-1$
private static final String ATTRIBUTE_CLASS = "class"; //$NON-NLS-1$
private static final String ATTRIBUTE_NAME = "name"; //$NON-NLS-1$
private static final String TOUCHPOINT_TYPE = "touchpointType"; //$NON-NLS-1$
private static final String TOUCHPOINT_VERSION = "touchpointVersion"; //$NON-NLS-1$
/**
* Service name constant for the action manager service. This service is used internally
* by the engine implementation and should not be referenced directly by clients.
*/
public static final String SERVICE_NAME = ActionManager.class.getName();
private HashMap<String, IConfigurationElement> actionMap;
private TouchpointManager touchpointManager;
public ActionManager() {
this.touchpointManager = new TouchpointManager();
RegistryFactory.getRegistry().addRegistryChangeListener(this, EngineActivator.ID);
}
public Touchpoint getTouchpointPoint(ITouchpointType type) {
if (type == null || type == ITouchpointType.NONE)
return null;
return touchpointManager.getTouchpoint(type);
}
public String getTouchpointQualifiedActionId(String actionId, ITouchpointType type) {
if (actionId.indexOf('.') == -1) {
if (type == null || type == ITouchpointType.NONE)
return actionId;
Touchpoint touchpoint = touchpointManager.getTouchpoint(type);
if (touchpoint == null)
throw new IllegalArgumentException(NLS.bind(Messages.ActionManager_Required_Touchpoint_Not_Found, type.toString(), actionId));
actionId = touchpoint.qualifyAction(actionId);
}
return actionId;
}
public ProvisioningAction getAction(String actionId, VersionRange versionRange) {
IConfigurationElement actionElement = getActionMap().get(actionId);
if (actionElement != null && actionElement.isValid()) {
try {
ProvisioningAction action = (ProvisioningAction) actionElement.createExecutableExtension(ATTRIBUTE_CLASS);
String touchpointType = actionElement.getAttribute(TOUCHPOINT_TYPE);
if (touchpointType != null) {
String touchpointVersion = actionElement.getAttribute(TOUCHPOINT_VERSION);
Touchpoint touchpoint = touchpointManager.getTouchpoint(touchpointType, touchpointVersion);
if (touchpoint == null)
throw new IllegalArgumentException(NLS.bind(Messages.ActionManager_Required_Touchpoint_Not_Found, touchpointType, actionId));
action.setTouchpoint(touchpoint);
}
return action;
} catch (InvalidRegistryObjectException e) {
// skip
} catch (CoreException e) {
throw new IllegalArgumentException(NLS.bind(Messages.ActionManager_Exception_Creating_Action_Extension, actionId));
}
}
return null;
}
private synchronized Map<String, IConfigurationElement> getActionMap() {
if (actionMap != null)
return actionMap;
IExtensionPoint point = RegistryFactory.getRegistry().getExtensionPoint(EngineActivator.ID, PT_ACTIONS);
IExtension[] extensions = point.getExtensions();
actionMap = new HashMap<String, IConfigurationElement>(extensions.length);
for (int i = 0; i < extensions.length; i++) {
try {
IConfigurationElement[] elements = extensions[i].getConfigurationElements();
for (int j = 0; j < elements.length; j++) {
IConfigurationElement actionElement = elements[j];
if (!actionElement.getName().equals(ELEMENT_ACTION))
continue;
String actionId = actionElement.getAttribute(ATTRIBUTE_NAME);
if (actionId == null)
continue;
if (actionId.indexOf('.') == -1)
actionId = actionElement.getNamespaceIdentifier() + "." + actionId; //$NON-NLS-1$
actionMap.put(actionId, actionElement);
}
} catch (InvalidRegistryObjectException e) {
// skip
}
}
return actionMap;
}
public synchronized void registryChanged(IRegistryChangeEvent event) {
actionMap = null;
}
static void reportError(String errorMsg) {
Status errorStatus = new Status(IStatus.ERROR, EngineActivator.ID, 1, errorMsg, null);
LogHelper.log(errorStatus);
}
}
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