/*
* 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.bundleloader;
import java.io.IOException;
import java.io.InputStream;
import java.util.Date;
import org.pentaho.reporting.libraries.base.util.ObjectUtilities;
import org.pentaho.reporting.libraries.docbundle.BundleResourceManagerBackend;
import org.pentaho.reporting.libraries.repository.ContentEntity;
import org.pentaho.reporting.libraries.repository.ContentIOException;
import org.pentaho.reporting.libraries.repository.ContentItem;
import org.pentaho.reporting.libraries.repository.ContentLocation;
import org.pentaho.reporting.libraries.repository.LibRepositoryBoot;
import org.pentaho.reporting.libraries.repository.Repository;
import org.pentaho.reporting.libraries.repository.RepositoryUtilities;
import org.pentaho.reporting.libraries.resourceloader.ResourceBundleData;
import org.pentaho.reporting.libraries.resourceloader.ResourceData;
import org.pentaho.reporting.libraries.resourceloader.ResourceKey;
import org.pentaho.reporting.libraries.resourceloader.ResourceLoadingException;
import org.pentaho.reporting.libraries.resourceloader.ResourceManager;
import org.pentaho.reporting.libraries.resourceloader.UnrecognizedLoaderException;
import org.pentaho.reporting.libraries.resourceloader.loader.AbstractResourceData;
/**
* A resource-bundle data implementation that uses a LibRepository repository as backend.
*
* @author Thomas Morgner
*/
public class RepositoryResourceBundleData extends AbstractResourceData implements ResourceBundleData
{
private ResourceKey bundleKey;
private Repository repository;
private ResourceKey mainKey;
private ContentLocation root;
private ContentItem contentItem;
private static final long serialVersionUID = -1661440107629389952L;
/**
* Creates a new RepositoryResourceBundleData object.
*
* @param bundleKey points to the physical location of the document bundle.
* @param repository the repository object loaded from the bundle-key.
* @param mainKey the bundles main entry.
* @param failOnMissingData a flag indicating whether to fail on missing entries.
* @throws ResourceLoadingException
*/
public RepositoryResourceBundleData(final ResourceKey bundleKey,
final Repository repository,
final ResourceKey mainKey,
final boolean failOnMissingData) throws ResourceLoadingException
{
if (bundleKey == null)
{
throw new NullPointerException();
}
if (repository == null)
{
throw new NullPointerException();
}
if (mainKey == null)
{
throw new NullPointerException();
}
try
{
this.bundleKey = bundleKey;
this.repository = repository;
this.mainKey = mainKey;
this.root = repository.getRoot();
final String identifier = (String) mainKey.getIdentifier();
final String[] name = RepositoryUtilities.split(identifier, "/");
if (RepositoryUtilities.isExistsEntity(repository, name) == false)
{
if (failOnMissingData)
{
throw new UnrecognizedLoaderException("This bundle data does not point to readable content: " + identifier);
}
else
{
this.contentItem = null;
}
}
else
{
final ContentEntity contentEntity = RepositoryUtilities.getEntity(repository, name);
if (contentEntity instanceof ContentItem == false)
{
if (failOnMissingData)
{
throw new UnrecognizedLoaderException("This bundle data does not point to readable content. Content entity is not a ContentItem");
}
else
{
this.contentItem = null;
}
}
else
{
this.contentItem = (ContentItem) contentEntity;
}
}
}
catch (ContentIOException e)
{
throw new ResourceLoadingException("Failed to create Bundle-Data", e);
}
}
public Repository getRepository()
{
return repository;
}
public ResourceBundleData deriveData(final ResourceKey key) throws ResourceLoadingException
{
if (key == null)
{
throw new NullPointerException();
}
if (ObjectUtilities.equal(key.getParent(), bundleKey) == false)
{
throw new IllegalArgumentException("This key is no derivate of the current bundle.");
}
return new RepositoryResourceBundleData(bundleKey, repository, key, true);
}
public InputStream getResourceAsStream(final ResourceManager caller) throws ResourceLoadingException
{
if (caller == null)
{
throw new NullPointerException();
}
if (contentItem == null)
{
throw new ResourceLoadingException("Failure: Missing data");
}
try
{
return contentItem.getInputStream();
}
catch (ContentIOException cioe)
{
throw new ResourceLoadingException("Failure", cioe);
}
catch (IOException e)
{
throw new ResourceLoadingException("Failure", e);
}
}
public ResourceKey getBundleKey()
{
return bundleKey;
}
public Object getAttribute(final String key)
{
if (key == null)
{
throw new NullPointerException();
}
if (contentItem == null)
{
return null;
}
if (ResourceData.CONTENT_TYPE.equals(key))
{
try
{
return contentItem.getMimeType();
}
catch (ContentIOException e)
{
return null;
}
}
else if (ResourceData.CONTENT_LENGTH.equals(key))
{
return contentItem.getAttribute(LibRepositoryBoot.REPOSITORY_DOMAIN, LibRepositoryBoot.SIZE_ATTRIBUTE);
}
else if (ResourceData.FILENAME.equals(key))
{
return contentItem.getName();
}
return null;
}
public ResourceKey getKey()
{
return mainKey;
}
public long getVersion(final ResourceManager caller) throws ResourceLoadingException
{
if (caller == null)
{
throw new NullPointerException();
}
final ContentEntity entity;
if (contentItem != null)
{
entity = contentItem;
}
else
{
entity = root;
}
final Object attribute = entity.getAttribute(LibRepositoryBoot.REPOSITORY_DOMAIN, LibRepositoryBoot.VERSION_ATTRIBUTE);
if (attribute instanceof Number)
{
final Number n = (Number) attribute;
return n.longValue();
}
else if (attribute instanceof Date)
{
final Date d = (Date) attribute;
return d.getTime();
}
// No version information available ..
return -1;
}
public ResourceManager deriveManager(final ResourceManager parent) throws ResourceLoadingException
{
return new ResourceManager(parent, new BundleResourceManagerBackend(repository, parent.getBackend(), bundleKey));
}
}