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/*******************************************************************************
 * Copyright (c) 2006, 2008 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 Corporation - initial API and implementation
 *******************************************************************************/

package org.eclipse.ui.internal.quickaccess;

import java.util.HashMap;
import java.util.Map;

import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.ui.IEditorReference;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.internal.IWorkbenchGraphicConstants;
import org.eclipse.ui.internal.WorkbenchImages;

/**
 * @since 3.3
 * 
 */
public class EditorProvider extends QuickAccessProvider {

  private Map idToElement;

  public QuickAccessElement getElementForId(String id) {
    getElements();
    return (EditorElement) idToElement.get(id);
  }

  public QuickAccessElement[] getElements() {
    if (idToElement == null) {
      idToElement = new HashMap();
      IWorkbenchPage activePage = PlatformUI.getWorkbench()
          .getActiveWorkbenchWindow().getActivePage();
      if (activePage == null) {
        return new QuickAccessElement[0];
      }
      IEditorReference[] editors = activePage.getEditorReferences();
      for (int i = 0; i < editors.length; i++) {
        EditorElement editorElement = new EditorElement(editors[i],
            this);
        idToElement.put(editorElement.getId(), editorElement);
      }
    }
    return (QuickAccessElement[]) idToElement.values().toArray(
        new QuickAccessElement[idToElement.values().size()]);
  }

  public String getId() {
    return "org.eclipse.ui.editors"; //$NON-NLS-1$
  }

  public ImageDescriptor getImageDescriptor() {
    return WorkbenchImages
        .getImageDescriptor(IWorkbenchGraphicConstants.IMG_OBJ_NODE);
  }

  public String getName() {
    return QuickAccessMessages.QuickAccess_Editors;
  }
}
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