bundles/org.eclipse.ui/Eclipse UI/org/eclipse/ui/internal/WorkingSetFactory.java

package org.eclipse.ui.internal;

/*
 * (c) Copyright IBM Corp. 2002.
 * All Rights Reserved.
 */
import java.util.HashSet;
import java.util.Set;

import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.ui.IElementFactory;
import org.eclipse.ui.IMemento;

/**
 * The WorkingSetFactory is used to recreate a WorkingSet object.
 *
 * @see IElementFactory
 */
public class WorkingSetFactory implements IElementFactory {

/**
 * @see IElementFactory
 */
public IAdaptable createElement(IMemento memento) {
	String workingSetName = memento.getString(IWorkbenchConstants.TAG_NAME);
	
	if (workingSetName == null)
		return null;

	IMemento[] itemMementos = memento.getChildren(IWorkbenchConstants.TAG_ITEM);
	Set items = new HashSet();
	for (int i = 0; i < itemMementos.length; i ++) {
		IMemento itemMemento = itemMementos[i];
		String factoryID = itemMemento.getString(IWorkbenchConstants.TAG_FACTORY_ID);
		
		if (factoryID == null) {
			WorkbenchPlugin.log("Unable to restore working set item - no factory ID.");//$NON-NLS-1$
			continue;
		}
		IElementFactory factory = WorkbenchPlugin.getDefault().getElementFactory(factoryID);
		if (factory == null) {
			WorkbenchPlugin.log("Unable to restore working set item - cannot instantiate factory: " + factoryID);//$NON-NLS-1$
			continue;
		}
		IAdaptable item = factory.createElement(itemMemento);
		if (item == null) {
			WorkbenchPlugin.log("Unable to restore working set item - cannot instantiate item: " + factoryID);//$NON-NLS-1$
			continue;
		}
		items.add(item);
	}
	WorkingSet workingSet = new WorkingSet(workingSetName, (IAdaptable[]) items.toArray(new IAdaptable[items.size()]));
	return workingSet;
}
}