/*
* 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;
import org.pentaho.reporting.libraries.resourceloader.Resource;
import org.pentaho.reporting.libraries.resourceloader.ResourceData;
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.ResourceLoadingException;
import org.pentaho.reporting.libraries.resourceloader.ResourceManager;
import org.pentaho.reporting.libraries.docbundle.metadata.BundleManifest;
import org.pentaho.reporting.libraries.docbundle.metadata.BundleMetaData;
import org.pentaho.reporting.libraries.docbundle.metadata.DefaultBundleMetaData;
/**
* A static (read-only) implementation of the document-metadata interface.
*
* @author Thomas Morgner
*/
public class StaticDocumentMetaData implements DocumentMetaData
{
private String bundleType;
private BundleMetaData metaData;
private BundleManifest manifest;
private ResourceManager resourceManager;
private ResourceKey bundleKey;
public StaticDocumentMetaData(final ResourceManager resourceManager,
final ResourceKey bundleKey) throws ResourceException
{
if (resourceManager == null)
{
throw new NullPointerException();
}
if (bundleKey == null)
{
throw new NullPointerException();
}
this.resourceManager = resourceManager;
this.bundleKey = bundleKey;
// A bundle without a manifest is not valid.
final ResourceKey manifestDataKey = resourceManager.deriveKey(bundleKey, "/META-INF/manifest.xml");
final Resource manifestDataResource = resourceManager.create(manifestDataKey, null, BundleManifest.class);
manifest = (BundleManifest) manifestDataResource.getResource();
metaData = createMetaData(resourceManager, bundleKey);
bundleType = readBundleType();
if (bundleType == null)
{
bundleType = manifest.getMimeType("/");
}
// bundle type can still be null.
}
private BundleMetaData createMetaData(final ResourceManager resourceManager, final ResourceKey bundleKey)
throws ResourceException
{
try
{
final ResourceKey metaDataKey = resourceManager.deriveKey(bundleKey, "/meta.xml");
// make sure we trigger a resource-loading exception ..
final ResourceData metaDataBytes = resourceManager.load(metaDataKey);
final Resource metaDataResource = resourceManager.create(metaDataKey, null, BundleMetaData.class);
return (BundleMetaData) metaDataResource.getResource();
}
catch (ResourceKeyCreationException e)
{
return new DefaultBundleMetaData();
}
catch (ResourceLoadingException e)
{
return new DefaultBundleMetaData();
}
}
private String readBundleType()
{
try
{
final ResourceKey mimeKey = this.resourceManager.deriveKey(bundleKey, "mimetype");
final ResourceData mimeData = this.resourceManager.load(mimeKey);
final byte[] data = mimeData.getResource(this.resourceManager);
return new String(data, "ASCII");
}
catch (Exception cioe)
{
return null;
}
}
public String getBundleType()
{
return bundleType;
}
public String getEntryMimeType(final String entry)
{
if (entry == null)
{
throw new NullPointerException();
}
return manifest.getMimeType(entry);
}
public Object getBundleAttribute(final String namespace, final String attributeName)
{
if (namespace == null)
{
throw new NullPointerException();
}
if (attributeName == null)
{
throw new NullPointerException();
}
return metaData.getBundleAttribute(namespace, attributeName);
}
public String[] getManifestEntryNames()
{
return manifest.getEntries();
}
public String[] getMetaDataNamespaces()
{
return metaData.getNamespaces();
}
public String[] getMetaDataNames(final String namespace)
{
if (namespace == null)
{
throw new NullPointerException();
}
return metaData.getNames(namespace);
}
public String getEntryAttribute(final String entryName, final String attributeName)
{
return manifest.getAttribute(entryName, attributeName);
}
public String[] getEntryAttributeNames(final String entryName)
{
return manifest.getAttributeNames(entryName);
}
public Object clone() throws CloneNotSupportedException
{
return super.clone();
}
}