/*
* 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) 2008 - 2009 Pentaho Corporation and Contributors.  All rights reserved.
*/

package org.pentaho.reporting.libraries.docbundle.metadata.writer;

import org.pentaho.reporting.libraries.docbundle.DocumentMetaData;
import org.pentaho.reporting.libraries.docbundle.metadata.BundleManifest;
import org.pentaho.reporting.libraries.docbundle.metadata.BundleMetaData;

import java.io.IOException;
import java.io.OutputStream;

public class DocumentMetaDataWriter {
  private static class BundleManifestWrapper implements BundleManifest {
    private DocumentMetaData documentMetaData;

    private BundleManifestWrapper( final DocumentMetaData documentMetaData ) {
      if ( documentMetaData == null ) {
        throw new NullPointerException();
      }
      this.documentMetaData = documentMetaData;
    }

    public String getMimeType( final String entry ) {
      if ( entry == null ) {
        throw new NullPointerException();
      }
      return documentMetaData.getEntryMimeType( entry );
    }

    public String[] getEntries() {
      return documentMetaData.getManifestEntryNames();
    }

    public String getAttribute( final String entryName, final String attributeName ) {
      return documentMetaData.getEntryAttribute( entryName, attributeName );
    }

    public String[] getAttributeNames( final String entryName ) {
      return documentMetaData.getEntryAttributeNames( entryName );
    }
  }

  private static class BundleMetaDataWrapper implements BundleMetaData {
    private DocumentMetaData documentMetaData;

    private BundleMetaDataWrapper( final DocumentMetaData documentMetaData ) {
      if ( documentMetaData == null ) {
        throw new NullPointerException();
      }
      this.documentMetaData = documentMetaData;
    }

    public Object getBundleAttribute( final String namespace, final String attributeName ) {
      if ( namespace == null ) {
        throw new NullPointerException();
      }
      if ( attributeName == null ) {
        throw new NullPointerException();
      }
      return documentMetaData.getBundleAttribute( namespace, attributeName );
    }

    public String[] getNamespaces() {
      return documentMetaData.getMetaDataNamespaces();
    }

    public String[] getNames( final String namespace ) {
      if ( namespace == null ) {
        throw new NullPointerException();
      }
      return documentMetaData.getMetaDataNames( namespace );
    }

    public Object clone() throws CloneNotSupportedException {
      throw new UnsupportedOperationException();
    }
  }

  private BundleManifestWrapper manifestWrapper;
  private BundleMetaDataWrapper metaDataWrapper;

  public DocumentMetaDataWriter( final DocumentMetaData documentMetaData ) {
    if ( documentMetaData == null ) {
      throw new NullPointerException();
    }

    this.manifestWrapper = new BundleManifestWrapper( documentMetaData );
    this.metaDataWrapper = new BundleMetaDataWrapper( documentMetaData );
  }

  public void writeManifest( final OutputStream out ) throws IOException {
    final BundleManifestXmlWriter xmlWriter = new BundleManifestXmlWriter( manifestWrapper );
    xmlWriter.write( out );
  }

  public void writeMetaData( final OutputStream out ) throws IOException {
    final BundleMetaDataXmlWriter xmlWriter = new BundleMetaDataXmlWriter( metaDataWrapper );
    xmlWriter.write( out );
  }
}