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/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2008 by Sun Microsystems, Inc.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* $RCSfile: DocumentContentReadHandler.java,v $
* $Revision: 1.4 $
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org 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 version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
package com.sun.star.report.pentaho.parser.office;
import com.sun.star.report.pentaho.OfficeNamespaces;
import com.sun.star.report.pentaho.model.OfficeDocument;
import com.sun.star.report.pentaho.model.OfficeStylesCollection;
import com.sun.star.report.pentaho.parser.style.OfficeStylesReadHandler;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.jfree.report.JFreeReport;
import org.pentaho.reporting.libraries.resourceloader.Resource;
import org.pentaho.reporting.libraries.resourceloader.ResourceException;
import org.pentaho.reporting.libraries.resourceloader.ResourceKey;
import org.pentaho.reporting.libraries.resourceloader.ResourceKeyCreationException;
import org.pentaho.reporting.libraries.resourceloader.ResourceManager;
import org.pentaho.reporting.libraries.xmlns.parser.AbstractXmlReadHandler;
import org.pentaho.reporting.libraries.xmlns.parser.XmlReadHandler;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
/**
* This is the root handler for the document context. The
* 'office:document-context' element is encountered, if the document is split
* into separate files.
* <p/>
* Alternativly, there is the option to keep everything in one file. The root
* element for that format is 'office:document'.
*/
public class DocumentContentReadHandler extends AbstractXmlReadHandler
{
private static final Log LOGGER = LogFactory.getLog(DocumentContentReadHandler.class);
private OfficeDocument report;
private FontFaceDeclsReadHandler fontFaceReadHandler;
private BodyReadHandler bodyReadHandler;
private OfficeStylesCollection officeStylesCollection;
public DocumentContentReadHandler()
{
}
/**
* Starts parsing.
*
* @param attrs the attributes.
* @throws org.xml.sax.SAXException if there is a parsing error.
*/
protected void startParsing(final Attributes attrs)
throws SAXException
{
super.startParsing(attrs);
// parse the external 'styles.xml' if it exists
// parse the external 'meta.xml' if it exists
// parse the external 'settings.xml' if it exists
this.report = parseContentXml();
this.report.setVirtual(true);
this.report.setType("document-content");
this.report.setNamespace(OfficeNamespaces.OFFICE_NS);
this.report.setVirtual(true);
this.officeStylesCollection = parseStylesXml();
}
private OfficeStylesCollection parseStylesXml()
{
final ResourceKey contextKey = getRootHandler().getContext();
final ResourceManager resourceManager = getRootHandler().getResourceManager();
try
{
final ResourceKey key =
resourceManager.deriveKey(contextKey, "styles.xml");
final Resource resource =
resourceManager.create(key, contextKey, OfficeStylesCollection.class);
final OfficeStylesCollection styles =
(OfficeStylesCollection) resource.getResource();
if (styles != null)
{
return styles;
}
}
catch (ResourceKeyCreationException e)
{
// ignore ..
LOGGER.debug("Failed to create resource-key for 'styles.xml'. Ignoring.", e);
}
catch (ResourceException e)
{
// ignore ..
LOGGER.debug("Failed to parse resource for 'styles.xml'. Ignoring.", e);
}
return new OfficeStylesCollection();
}
private OfficeDocument parseContentXml()
{
// Check whether this is a content.xml.
if (!OfficeNamespaces.OFFICE_NS.equals(getUri()) || "document-content".equals(getTagName()))
{
return new OfficeDocument();
}
// we may have to parse an existing content.xml.
final ResourceKey contextKey = getRootHandler().getContext();
final ResourceManager resourceManager = getRootHandler().getResourceManager();
try
{
final ResourceKey key =
resourceManager.deriveKey(contextKey, "content.xml");
final Resource resource =
resourceManager.create(key, contextKey, JFreeReport.class);
final OfficeDocument doc = (OfficeDocument) resource.getResource();
if (doc != null)
{
return doc;
}
}
catch (ResourceKeyCreationException e)
{
// ignore ..
LOGGER.debug("Failed to create resource-key for 'content.xml'. Ignoring.");
}
catch (ResourceException e)
{
// ignore ..
LOGGER.debug("Failed to parse resource for 'content.xml'. Ignoring.");
}
return new OfficeDocument();
}
/**
* Returns the handler for a child element.
*
* @param tagName the tag name.
* @param atts the attributes.
* @return the handler or null, if the tagname is invalid.
*
* @throws org.xml.sax.SAXException if there is a parsing error.
*/
protected XmlReadHandler getHandlerForChild(final String uri,
final String tagName,
final Attributes atts)
throws SAXException
{
if (OfficeNamespaces.OFFICE_NS.equals(uri))
{
if ("font-face-decls".equals(tagName))
{
if (fontFaceReadHandler == null)
{
fontFaceReadHandler = new FontFaceDeclsReadHandler(officeStylesCollection.getFontFaceDecls());
}
return fontFaceReadHandler;
}
else if ("automatic-styles".equals(tagName))
{
return new OfficeStylesReadHandler(officeStylesCollection.getAutomaticStyles());
}
else if ("styles".equals(tagName))
{
return new OfficeStylesReadHandler(officeStylesCollection.getCommonStyles());
}
else if ("master-styles".equals(tagName))
{
return new MasterStylesReadHandler(officeStylesCollection.getMasterStyles());
}
else if ("body".equals(tagName))
{
bodyReadHandler = new BodyReadHandler();
return bodyReadHandler;
}
}
return null;
}
/**
* Done parsing.
*
* @throws org.xml.sax.SAXException if there is a parsing error.
*/
protected void doneParsing()
throws SAXException
{
// The office-document is the only node of the report. It allows us to
// switch the layout-processing implementation later on.
report.setStylesCollection(officeStylesCollection);
if (bodyReadHandler != null)
{
report.addNode(bodyReadHandler.getElement());
}
}
/**
* Returns the object for this element or null, if this element does not
* create an object.
*
* @return the object.
*/
public Object getObject()
throws SAXException
{
return report;
}
}
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