FileBuffersPlugin.java :  » IDE-Eclipse » core » org » eclipse » core » internal » filebuffers » Java Open Source

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/*******************************************************************************
 * Copyright (c) 2000, 2007 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.core.internal.filebuffers;

import org.osgi.framework.Bundle;

import org.eclipse.core.runtime.Assert;
import org.eclipse.core.runtime.Platform;
import org.eclipse.core.runtime.Plugin;

import org.eclipse.core.filebuffers.ITextFileBufferManager;



/**
 * The plug-in runtime class for the file buffers plug-in (id <code>"org.eclipse.core.filebuffers"</code>).
 *
 * @since 3.0
 */
public class FileBuffersPlugin extends Plugin {

  public static final String PLUGIN_ID= "org.eclipse.core.filebuffers"; //$NON-NLS-1$

  /** The shared plug-in instance */
  private static FileBuffersPlugin fgPlugin;
  /** The file buffer manager */
  private ITextFileBufferManager fTextFileBufferManager;

  /**
   * Creates a plug-in instance.
   */
  public FileBuffersPlugin() {
    Assert.isTrue(fgPlugin == null);
    fgPlugin= this;
  }

  /**
   * Returns the shared instance.
   *
   * @return the default plug-in instance
   */
  public static FileBuffersPlugin getDefault() {
    return fgPlugin;
  }

  /**
   * Returns the text file buffer manager of this plug-in.
   *
   * @return the text file buffer manager of this plug-in
   */
  public synchronized ITextFileBufferManager getFileBufferManager()  {
    if (fTextFileBufferManager == null) {
      Bundle resourcesBundle= Platform.getBundle("org.eclipse.core.resources"); //$NON-NLS-1$
      if (resourcesBundle != null)
        fTextFileBufferManager= new ResourceTextFileBufferManager();
      else
        fTextFileBufferManager= new TextFileBufferManager();
    }
    return fTextFileBufferManager;
  }
}
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