/**
* Copyright (c) 2002-2006 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 - Initial API and implementation
*/
package org.eclipse.emf.ecore.plugin;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.Platform;
import org.eclipse.emf.ecore.resource.Resource;
/**
* A plugin extension reader that populates the
* {@link org.eclipse.emf.ecore.resource.Resource.Factory.Registry#INSTANCE global} resource factory's
* {@link org.eclipse.emf.ecore.resource.Resource.Factory.Registry#getExtensionToFactoryMap() extension} map.
* Clients are not expected to use this class directly.
*/
class ExtensionParserRegistryReader extends RegistryReader
{
static final String TAG_PARSER = "parser";
static final String ATT_TYPE = "type";
static final String ATT_CLASS = "class";
public ExtensionParserRegistryReader()
{
super
(Platform.getExtensionRegistry(),
EcorePlugin.getPlugin().getBundle().getSymbolicName(),
EcorePlugin.EXTENSION_PARSER_PPID);
}
@Override
protected boolean readElement(IConfigurationElement element, boolean add)
{
if (element.getName().equals(TAG_PARSER))
{
String type = element.getAttribute(ATT_TYPE);
if (type == null)
{
logMissingAttribute(element, ATT_TYPE);
}
else if (element.getAttribute(ATT_CLASS) == null)
{
logMissingAttribute(element, ATT_CLASS);
}
else if (add)
{
Object previous = Resource.Factory.Registry.INSTANCE.getExtensionToFactoryMap().put(type, new ResourceFactoryDescriptor(element, ATT_CLASS));
if (previous instanceof ResourceFactoryDescriptor)
{
ResourceFactoryDescriptor descriptor = (ResourceFactoryDescriptor)previous;
EcorePlugin.INSTANCE.log
("Both '" + descriptor.element.getContributor().getName() + "' and '" + element.getContributor().getName() + "' register an extension parser for '" + type + "'");
}
return true;
}
else
{
Resource.Factory.Registry.INSTANCE.getExtensionToFactoryMap().remove(type);
return true;
}
}
return false;
}
}