EditorInputAdapterFactory.java :  » IDE-Eclipse » jdt » org » eclipse » jdt » internal » ui » Java Open Source

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/*******************************************************************************
 * Copyright (c) 2000, 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.jdt.internal.ui;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IAdapterFactory;

import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.IStorageEditorInput;

import org.eclipse.search.ui.ISearchPageScoreComputer;

import org.eclipse.jdt.core.IJavaElement;

import org.eclipse.jdt.ui.JavaUI;

import org.eclipse.jdt.internal.ui.search.JavaSearchPageScoreComputer;
import org.eclipse.jdt.internal.ui.search.SearchUtil;

/**
 * Adapter factory to support basic UI operations for for editor inputs.
 */
public class EditorInputAdapterFactory implements IAdapterFactory {

  private static Class[] PROPERTIES= new Class[] {IJavaElement.class};

  private Object fSearchPageScoreComputer;

  public Class[] getAdapterList() {
    updateLazyLoadedAdapters();
    return PROPERTIES;
  }

  public Object getAdapter(Object element, Class key) {
    updateLazyLoadedAdapters();
    if (fSearchPageScoreComputer != null && ISearchPageScoreComputer.class.equals(key))
      return fSearchPageScoreComputer;

    if (IJavaElement.class.equals(key) && element instanceof IEditorInput) {
      IJavaElement je= JavaUI.getWorkingCopyManager().getWorkingCopy((IEditorInput)element);
      if (je != null)
        return je;
      if (element instanceof IStorageEditorInput) {
        try {
          return ((IStorageEditorInput)element).getStorage().getAdapter(key);
        } catch (CoreException ex) {
          // Fall through
        }
      }
    }
    return null;
  }

  private void updateLazyLoadedAdapters() {
    if (fSearchPageScoreComputer == null && SearchUtil.isSearchPlugInActivated())
      createSearchPageScoreComputer();
  }

  private void createSearchPageScoreComputer() {
    fSearchPageScoreComputer= new JavaSearchPageScoreComputer();
    PROPERTIES= new Class[] {ISearchPageScoreComputer.class, IJavaElement.class};
  }
}
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