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/******************************************************************************
* Copyright (c) 2006, 2020 Borland Software Corporation, CEA LIST, Artal
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Artem Tikhomirov (Borland) - initial API and implementation
* Aurelien Didier (ARTAL) - aurelien.didier51@gmail.com - Bug 569174
*****************************************************************************/
package org.eclipse.papyrus.gmf.internal.bridge.transform;
import org.eclipse.core.runtime.Platform;
import org.eclipse.emf.common.util.URI;
import org.eclipse.papyrus.gmf.internal.bridge.NaiveIdentifierDispenser;
import org.eclipse.papyrus.gmf.internal.bridge.StatefulVisualIdentifierDispencer;
import org.eclipse.papyrus.gmf.internal.bridge.VisualIdentifierDispenser;
import org.eclipse.papyrus.gmf.internal.bridge.ui.Plugin;
import org.osgi.framework.Bundle;
/**
* holds additional logic to pre/post process dispensers
* FIXME this class public only for use in codegen.ui for old transform action
* TODO package-local as soon as old transform action is removed
*/
public class VisualIdentifierDispenserProvider {
private VisualIdentifierDispenser dispenser;
private final URI myStateBaseURI;
// FIXME see class comment why public
public VisualIdentifierDispenserProvider(URI stateBaseURI) {
myStateBaseURI = stateBaseURI;
}
private VisualIdentifierDispenser initialize() {
Bundle tracePluginBundle = Platform.getBundle("org.eclipse.papyrus.gmf.bridge.trace"); //$NON-NLS-1$
if (tracePluginBundle != null) {
try {
Class<?> despenserClass = tracePluginBundle.loadClass("org.eclipse.papyrus.gmf.internal.bridge.trace.MergingIdentifierDispenser"); //$NON-NLS-1$
return (VisualIdentifierDispenser) despenserClass.newInstance();
} catch (ClassNotFoundException e) {
Plugin.log(Plugin.createError("MergingIdentifierDispenser was not found in org.eclipse.papyrus.gmf.bridge.trace bundle", e)); //$NON-NLS-1$
} catch (InstantiationException e) {
Plugin.log(Plugin.createError("MergingIdentifierDispenser was not instantiated", e)); //$NON-NLS-1$
} catch (IllegalAccessException e) {
Plugin.log(Plugin.createError("IllegalAccessException while instantiating MergingIdentifierDispenser", e)); //$NON-NLS-1$
} catch (ClassCastException ex) {
Plugin.log(Plugin.createError("MergingIdentifierDispenser was not instantiated", ex)); //$NON-NLS-1$
}
}
return new NaiveIdentifierDispenser();
}
public VisualIdentifierDispenser get() {
assert dispenser != null;
return dispenser;
}
public void acquire() {
assert dispenser == null;
dispenser = initialize();
if (dispenser instanceof StatefulVisualIdentifierDispencer) {
StatefulVisualIdentifierDispencer statefulDispencer = (StatefulVisualIdentifierDispencer) dispenser;
statefulDispencer.loadState(myStateBaseURI);
}
}
public void release() {
if (dispenser instanceof StatefulVisualIdentifierDispencer) {
((StatefulVisualIdentifierDispencer) dispenser).saveState();
}
dispenser = null;
}
}
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