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/*******************************************************************************
* Copyright (c) 2014 Obeo.
* 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:
* Obeo - initial API and implementation
*******************************************************************************/
package org.eclipse.emf.compare.rcp.ui.internal.configuration.ui;
import java.util.Map;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.ILog;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.emf.compare.rcp.extension.AbstractRegistryEventListener;
import org.eclipse.emf.compare.rcp.internal.extension.IItemRegistry;
import org.eclipse.emf.compare.rcp.ui.internal.EMFCompareRCPUIMessages;
/**
* Registry event listener used for {@link IConfiguratorUIRegistry}
*
* @author <a href="mailto:arthur.daussy@obeo.fr">Arthur Daussy</a>
*/
public class ConfigurationUIRegistryEventListener extends AbstractRegistryEventListener {
private static final String ELEMENT_TAG = "configurator"; //$NON-NLS-1$
private static final String ITEM_TO_CONFIGURE_ATTR = "itemToConfigure"; //$NON-NLS-1$
private static final String UI_PROVIDER_ATTR = "uiProvider"; //$NON-NLS-1$
/** Storage for {@link IConfiguratorUIRegistry}. */
private final Map<String, IConfigurationUIFactory> registry;
/** Mirror registry holding item to configure. */
private final IItemRegistry<?> registryOfConfiguredItem;
/**
* Constructor.
*
* @param namespace
* The namespace of the extension point to be monitored.
* @param extensionPointID
* The extension point ID to be monitored
* @param log
* The log object to be used to log error and/or warning.
* @param registry
* that will be filled
* @param registryOfConfiguredItem
* Mirror registry holding item to configure.
*/
public ConfigurationUIRegistryEventListener(String namespace, String extensionPointID, ILog log,
Map<String, IConfigurationUIFactory> registry, IItemRegistry<?> registryOfConfiguredItem) {
super(namespace, extensionPointID, log);
this.registry = registry;
this.registryOfConfiguredItem = registryOfConfiguredItem;
}
/**
* {@inheritDoc}
*
* @see org.eclipse.emf.compare.rcp.extension.AbstractRegistryEventListener#validateExtensionElement(org.eclipse.core.runtime.IConfigurationElement)
*/
@Override
protected boolean validateExtensionElement(IConfigurationElement element) {
final boolean ret;
if (ELEMENT_TAG.equals(element.getName())) {
if (element.getAttribute(ITEM_TO_CONFIGURE_ATTR) == null) {
logMissingAttribute(element, ITEM_TO_CONFIGURE_ATTR);
ret = false;
} else if (element.getAttribute(ITEM_TO_CONFIGURE_ATTR) != null) {
Object itemToConfigure = registryOfConfiguredItem.getItemDescriptor(element
.getAttribute(ITEM_TO_CONFIGURE_ATTR));
if (itemToConfigure == null) {
log(IStatus.WARNING, element, EMFCompareRCPUIMessages
.getString("ConfigurationUIRegistryEventListener.INCORRECT_ID_PARAMETER")); //$NON-NLS-1$
ret = false;
} else {
ret = true;
}
} else if (element.getAttribute(UI_PROVIDER_ATTR) == null) {
logMissingAttribute(element, UI_PROVIDER_ATTR);
ret = false;
} else {
ret = true;
}
} else {
ret = false;
}
return ret;
}
/**
* {@inheritDoc}
*
* @see org.eclipse.emf.compare.rcp.extension.AbstractRegistryEventListener#addedValid(org.eclipse.core.runtime.IConfigurationElement)
*/
@Override
protected boolean addedValid(IConfigurationElement element) {
try {
Object configurator = element.createExecutableExtension(UI_PROVIDER_ATTR);
if (configurator instanceof IConfigurationUIFactory) {
IConfigurationUIFactory configurationFactory = (IConfigurationUIFactory)configurator;
String itemToConfigureID = element.getAttribute(ITEM_TO_CONFIGURE_ATTR);
IConfigurationUIFactory previous = registry.put(itemToConfigureID, configurationFactory);
if (previous != null) {
log(IStatus.WARNING, element, EMFCompareRCPUIMessages.getString(
"duplicate.extension", registry.getClass().getName())); //$NON-NLS-1$
}
} else {
log(IStatus.WARNING, element, EMFCompareRCPUIMessages
.getString("ConfigurationUIRegistryEventListener.INCORRECT_CONFIGURATOR_PARAMETER")); //$NON-NLS-1$
}
} catch (CoreException e) {
e.printStackTrace();
log(element, e);
}
return true;
}
/**
* {@inheritDoc}
*
* @see org.eclipse.emf.compare.rcp.extension.AbstractRegistryEventListener#removedValid(org.eclipse.core.runtime.IConfigurationElement)
*/
@Override
protected boolean removedValid(IConfigurationElement element) {
return registry.remove(element.getAttribute(ITEM_TO_CONFIGURE_ATTR)) != null;
}
}
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