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WrapperSVGDrawableFactoryModule.java
/*
 * This program is free software; you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
 * Foundation.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this
 * program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
 * or from the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Lesser General Public License for more details.
 *
 * Copyright (c) 2006 - 2009 Pentaho Corporation and Contributors.  All rights reserved.
 */

package org.pentaho.reporting.libraries.resourceloader.modules.factory.svg;

import org.pentaho.reporting.libraries.resourceloader.factory.FactoryModule;
import org.pentaho.reporting.libraries.resourceloader.ResourceManager;
import org.pentaho.reporting.libraries.resourceloader.ResourceData;
import org.pentaho.reporting.libraries.resourceloader.ResourceCreationException;
import org.pentaho.reporting.libraries.resourceloader.ResourceLoadingException;
import org.pentaho.reporting.libraries.resourceloader.Resource;
import org.pentaho.reporting.libraries.resourceloader.ResourceKey;
import org.pentaho.reporting.libraries.base.util.ObjectUtilities;

/**
 * Todo: Document Me
 *
 * @author Thomas Morgner
 */
00034 public class WrapperSVGDrawableFactoryModule implements FactoryModule
{
  private FactoryModule parent;

  public WrapperSVGDrawableFactoryModule()
  {
    parent = (FactoryModule) ObjectUtilities.loadAndInstantiate
        ("org.pentaho.reporting.libraries.resourceloader.modules.factory.svg.SVGDrawableFactoryModule",
            WrapperSVGDrawableFactoryModule.class, FactoryModule.class);
  }

  public int canHandleResource(final ResourceManager caller, final ResourceData data) throws ResourceCreationException, ResourceLoadingException
  {
    if (parent == null)
    {
      return FactoryModule.REJECTED;
    }
    return parent.canHandleResource(caller, data);
  }

  public int getHeaderFingerprintSize()
  {
    if (parent == null)
    {
      return 0;
    }
    return parent.getHeaderFingerprintSize();
  }

  public Resource create(final ResourceManager caller, final ResourceData data, final ResourceKey context) throws ResourceCreationException, ResourceLoadingException
  {
    if (parent == null)
    {
      throw new ResourceCreationException("Cannot create resource: Batik libraries are not available.");
    }
    return parent.create(caller, data, context);
  }
}

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