/*
* 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) 2001 - 2013 Object Refinery Ltd, Pentaho Corporation and Contributors.. All rights reserved.
*/
package org.pentaho.reporting.engine.classic.core.modules.parser.data.compounddata.writer;
import org.pentaho.reporting.engine.classic.core.CompoundDataFactory;
import org.pentaho.reporting.engine.classic.core.DataFactory;
import org.pentaho.reporting.engine.classic.core.modules.parser.bundle.writer.BundleDataFactoryWriterHandler;
import org.pentaho.reporting.engine.classic.core.modules.parser.bundle.writer.BundleWriterException;
import org.pentaho.reporting.engine.classic.core.modules.parser.bundle.writer.BundleWriterState;
import org.pentaho.reporting.engine.classic.core.modules.parser.bundle.writer.BundleWriterUtilities;
import org.pentaho.reporting.engine.classic.core.modules.parser.data.compounddata.CompoundDataFactoryModule;
import org.pentaho.reporting.libraries.base.util.IOUtils;
import org.pentaho.reporting.libraries.docbundle.BundleUtilities;
import org.pentaho.reporting.libraries.docbundle.WriteableDocumentBundle;
import org.pentaho.reporting.libraries.xmlns.common.AttributeList;
import org.pentaho.reporting.libraries.xmlns.writer.DefaultTagDescription;
import org.pentaho.reporting.libraries.xmlns.writer.XmlWriter;
import org.pentaho.reporting.libraries.xmlns.writer.XmlWriterSupport;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
public class CompoundDataFactoryWriteHandler implements BundleDataFactoryWriterHandler {
public CompoundDataFactoryWriteHandler() {
}
/**
* Writes a data-source into a own file. The name of file inside the bundle is returned as string. The file name
* returned is always absolute and can be made relative by using the IOUtils of LibBase. If the writer-handler did not
* generate a file on its own, it should return null.
*
* @param bundle
* the bundle where to write to.
* @param state
* the writer state to hold the current processing information.
* @return the name of the newly generated file or null if no file was created.
* @throws IOException
* if any error occured
* @throws BundleWriterException
* if a bundle-management error occured.
*/
public String writeDataFactory( final WriteableDocumentBundle bundle, final DataFactory dataFactory,
final BundleWriterState state ) throws IOException, BundleWriterException {
if ( bundle == null ) {
throw new NullPointerException();
}
if ( dataFactory == null ) {
throw new NullPointerException();
}
if ( state == null ) {
throw new NullPointerException();
}
final CompoundDataFactory compoundDataFactory = (CompoundDataFactory) dataFactory;
final String fileName =
BundleUtilities.getUniqueName( bundle, state.getFileName(), "datasources/compound-ds{0}.xml" );
if ( fileName == null ) {
throw new IOException( "Unable to generate unique name for Inline-Data-Source" );
}
final OutputStream outputStream = bundle.createEntry( fileName, "text/xml" );
final DefaultTagDescription tagDescription = new DefaultTagDescription();
tagDescription.setDefaultNamespace( CompoundDataFactoryModule.NAMESPACE );
tagDescription.setNamespaceHasCData( CompoundDataFactoryModule.NAMESPACE, false );
final XmlWriter xmlWriter =
new XmlWriter( new OutputStreamWriter( outputStream, "UTF-8" ), tagDescription, " ", "\n" );
final AttributeList rootAttrs = new AttributeList();
rootAttrs.addNamespaceDeclaration( "data", CompoundDataFactoryModule.NAMESPACE );
xmlWriter.writeTag( CompoundDataFactoryModule.NAMESPACE, "compound-datasource", rootAttrs, XmlWriterSupport.OPEN );
for ( int i = 0; i < compoundDataFactory.size(); i++ ) {
final DataFactory df = compoundDataFactory.get( i );
final BundleDataFactoryWriterHandler writerHandler = BundleWriterUtilities.lookupWriteHandler( df );
if ( writerHandler == null ) {
throw new BundleWriterException( "Unable to find writer-handler for data-factory " + df.getClass() );
}
final String file = writerHandler.writeDataFactory( bundle, df, state );
if ( file == null ) {
throw new BundleWriterException( "Data-factory writer did not create a file for " + df.getClass() );
}
final String refFile = IOUtils.getInstance().createRelativePath( file, fileName );
xmlWriter.writeTag( CompoundDataFactoryModule.NAMESPACE, "data-factory", "href", refFile, XmlWriterSupport.CLOSE );
}
xmlWriter.writeCloseTag();
xmlWriter.close();
return fileName;
}
}