/*
* Copyright 1999-2002,2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.cocoon.portal.source;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import org.apache.avalon.framework.context.Context;
import org.apache.avalon.framework.context.ContextException;
import org.apache.avalon.framework.context.Contextualizable;
import org.apache.avalon.framework.service.ServiceException;
import org.apache.avalon.framework.service.ServiceManager;
import org.apache.avalon.framework.service.ServiceSelector;
import org.apache.avalon.framework.service.Serviceable;
import org.apache.cocoon.CascadingIOException;
import org.apache.cocoon.components.ContextHelper;
import org.apache.cocoon.portal.coplet.CopletInstanceData;
import org.apache.cocoon.portal.coplet.adapter.CopletAdapter;
import org.apache.cocoon.serialization.Serializer;
import org.apache.excalibur.source.Source;
import org.apache.excalibur.source.SourceNotFoundException;
import org.apache.excalibur.source.SourceValidity;
import org.apache.excalibur.xml.sax.XMLizable;
import org.xml.sax.ContentHandler;
import org.xml.sax.SAXException;
/**
* This is the source implementation of the coplet source
*
* @author <a href="mailto:cziegeler@s-und-n.de">Carsten Ziegeler</a>
* @author <a href="mailto:volker.schmitt@basf-it-services.com">Volker Schmitt</a>
*
* @version CVS $Id: CopletSource.java,v 1.8 2004/04/19 14:47:31 cziegeler Exp $
*/
public class CopletSource
implements Source, XMLizable, Serviceable, Contextualizable {
protected ServiceManager manager;
protected Context context;
protected String uri;
protected String copletControllerName;
protected CopletInstanceData copletInstanceData;
/** The used protocol */
protected String scheme;
/* (non-Javadoc)
* @see org.apache.avalon.framework.service.Serviceable#service(org.apache.avalon.framework.service.ServiceManager)
*/
public void service(ServiceManager manager) throws ServiceException {
this.manager = manager;
}
/* (non-Javadoc)
* @see org.apache.avalon.framework.context.Contextualizable#contextualize(org.apache.avalon.framework.context.Context)
*/
public void contextualize(Context context) throws ContextException {
this.context = context;
}
public CopletSource(String location, String protocol,
CopletInstanceData coplet) {
this.uri = location;
this.scheme = (protocol == null ? "coplet" : protocol);
this.copletInstanceData = coplet;
this.copletControllerName = this.copletInstanceData.getCopletData().getCopletBaseData().getCopletAdapterName();
}
/**
* @see org.apache.excalibur.source.Source#getInputStream()
*/
public InputStream getInputStream() throws IOException, SourceNotFoundException {
try {
ServiceManager sitemapManager = (ServiceManager) this.context.get(ContextHelper.CONTEXT_SITEMAP_SERVICE_MANAGER);
ServiceSelector serializerSelector = null;
Serializer serializer = null;
try {
serializerSelector = (ServiceSelector) sitemapManager.lookup(Serializer.ROLE+"Selector");
serializer = (Serializer) serializerSelector.select("xml");
ByteArrayOutputStream os = new ByteArrayOutputStream();
serializer.setOutputStream(os);
this.toSAX(serializer);
return new ByteArrayInputStream(os.toByteArray());
} catch (SAXException se) {
throw new CascadingIOException("Unable to stream content.", se);
} catch (ServiceException ce) {
throw new CascadingIOException("Unable to get components for serializing.", ce);
} finally {
if ( serializer != null ) {
serializerSelector.release(serializer);
}
sitemapManager.release(serializerSelector);
}
} catch (ContextException ce) {
throw new CascadingIOException("Unable to get service manager.", ce);
}
}
/**
* @see org.apache.excalibur.source.Source#getURI()
*/
public String getURI() {
return this.uri;
}
/**
* @see org.apache.excalibur.source.Source#getValidity()
*/
public SourceValidity getValidity() {
return null;
}
/**
* @see org.apache.excalibur.source.Source#refresh()
*/
public void refresh() {
}
/**
* @see org.apache.excalibur.source.Source#getMimeType()
*/
public String getMimeType() {
return null;
}
/**
* @see org.apache.excalibur.source.Source#getContentLength()
*/
public long getContentLength() {
return -1;
}
/**
* @see org.apache.excalibur.source.Source#getLastModified()
*/
public long getLastModified() {
return 0;
}
/**
* @see org.apache.excalibur.xml.sax.XMLizable#toSAX(ContentHandler)
*/
public void toSAX(ContentHandler handler)
throws SAXException {
ServiceSelector copletAdapterSelector = null;
CopletAdapter copletAdapter = null;
try {
copletAdapterSelector = (ServiceSelector)this.manager.lookup(CopletAdapter.ROLE+"Selector");
copletAdapter = (CopletAdapter)copletAdapterSelector.select(this.copletControllerName);
copletAdapter.toSAX(this.copletInstanceData, handler);
} catch (ServiceException ce) {
throw new SAXException("Unable to lookup coplet adaptor or adaptor selector.", ce);
} finally {
if ( null != copletAdapter ) {
copletAdapterSelector.release( copletAdapter );
}
this.manager.release(copletAdapterSelector);
}
}
/**
* @see org.apache.excalibur.source.Source#exists()
*/
public boolean exists() {
return true;
}
/**
* @see org.apache.excalibur.source.Source#getScheme()
*/
public String getScheme() {
return this.scheme;
}
}