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/*****************************************************************************
* Copyright (c) 2014 CEA LIST.
*
* 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:
* CEA LIST - Initial API and implementation
*
*****************************************************************************/
package org.eclipse.papyrus.infra.elementtypesconfigurations.invarianttypes.invarianttypeconfiguration;
import java.util.HashMap;
import java.util.Map;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.Platform;
import org.eclipse.papyrus.infra.elementtypesconfigurations.Activator;
import org.eclipse.papyrus.infra.elementtypesconfigurations.invarianttypeconfiguration.InvariantRuleConfiguration;
public class InvariantRuleConfigurationTypeRegistry {
/** private singleton instance */
private static InvariantRuleConfigurationTypeRegistry registry;
/** map configuration type to invariantRule */
protected Map<String, IInvariantRule<? extends InvariantRuleConfiguration>> invariantRuleConfigurationTypeToInvariantRule = null;
/**
* returns the singleton instance of this registry
*
* @return the singleton instance of this registry
*/
public static synchronized InvariantRuleConfigurationTypeRegistry getInstance() {
if (registry == null) {
registry = new InvariantRuleConfigurationTypeRegistry();
registry.init();
}
return registry;
}
/**
* Inits the registry.
*/
protected void init() {
invariantRuleConfigurationTypeToInvariantRule = new HashMap<String, IInvariantRule<? extends InvariantRuleConfiguration>>();
IConfigurationElement[] elements = Platform.getExtensionRegistry().getConfigurationElementsFor(IInvariantRuleExtensionPoint.EXTENSION_POINT_ID);
for (IConfigurationElement configurationElement : elements) {
String configurationClass = configurationElement.getAttribute(IInvariantRuleExtensionPoint.CONFIGURATION_CLASS);
try {
Object invariantRuleClass = configurationElement.createExecutableExtension(IInvariantRuleExtensionPoint.INVARIANT_RULE_CLASS);
if (invariantRuleClass instanceof IInvariantRule) {
invariantRuleConfigurationTypeToInvariantRule.put(configurationClass, (IInvariantRule<?>) invariantRuleClass);
}
} catch (CoreException e) {
Activator.log.error(e);
}
}
}
public <T extends InvariantRuleConfiguration> IInvariantRule<? extends InvariantRuleConfiguration> getInvariantRule(T invariantRuleConfiguration) {
String invariantRuleConfigurationType = invariantRuleConfiguration.eClass().getInstanceTypeName();
// We assume here that the right invariantType is registered for the right InvariantRuleConfiguration
@SuppressWarnings("unchecked")
IInvariantRule<T> invariantRule = (IInvariantRule<T>) invariantRuleConfigurationTypeToInvariantRule.get(invariantRuleConfigurationType);
if (invariantRule != null) {
invariantRule.init(invariantRuleConfiguration);
return invariantRule;
} else {
return new DefaultInvariantRule();
}
}
}
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