/*
* The Sun Project JXTA(TM) Software License
*
* Copyright (c) 2001-2007 Sun Microsystems, Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. The end-user documentation included with the redistribution, if any, must
* include the following acknowledgment: "This product includes software
* developed by Sun Microsystems, Inc. for JXTA(TM) technology."
* Alternately, this acknowledgment may appear in the software itself, if
* and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Sun", "Sun Microsystems, Inc.", "JXTA" and "Project JXTA" must
* not be used to endorse or promote products derived from this software
* without prior written permission. For written permission, please contact
* Project JXTA at http://www.jxta.org.
*
* 5. Products derived from this software may not be called "JXTA", nor may
* "JXTA" appear in their name, without prior written permission of Sun.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SUN
* MICROSYSTEMS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* JXTA is a registered trademark of Sun Microsystems, Inc. in the United
* States and other countries.
*
* Please see the license information page at :
* <http://www.jxta.org/project/www/license.html> for instructions on use of
* the license in source files.
*
* ====================================================================
* This software consists of voluntary contributions made by many individuals
* on behalf of Project JXTA. For more information on Project JXTA, please see
* http://www.jxta.org.
*
* This license is based on the BSD license adopted by the Apache Foundation.
*/
package net.jxta.impl.protocol;
import java.util.Enumeration;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.logging.Level;
import java.util.logging.Logger;
import net.jxta.logging.Logging;
import net.jxta.content.ContentID;
import net.jxta.document.Advertisement;
import net.jxta.document.AdvertisementFactory;
import net.jxta.document.Attribute;
import net.jxta.document.Document;
import net.jxta.document.Element;
import net.jxta.document.MimeMediaType;
import net.jxta.document.StructuredDocument;
import net.jxta.document.XMLElement;
import net.jxta.id.IDFactory;
import net.jxta.protocol.ContentAdvertisement;
/**
* Basic implementation of the ContentAdvertisement which contains enough
* information to reproduce everything about a Content with the exception
* of the data payload itself. This advertisement is intended to be
* extended by those creating more capable ContentProvider implementations
* such that additional information can be provided alongside this minimal
* data set.
*/
public class ContentAdvertisementImpl extends ContentAdvertisement {
/**
* Logger.
*/
private static final Logger LOG =
Logger.getLogger(ContentAdvertisementImpl.class.getName());
/**
* ContentID field.
*/
private static final String contentIDTag = "ContentID";
/**
* MetaID field.
*/
private static final String metaIDTag = "MetaID";
/**
* MIME type field.
*/
private static final String docMimeTag = "DocMime";
/**
* Fields to index on.
*/
private static final String [] fields = {
contentIDTag, metaIDTag, docMimeTag
};
/**
* Instantiator for this Advertisement type.
*/
public static class Instantiator
implements AdvertisementFactory.Instantiator {
/**
* {@inheritDoc}
*/
public String getAdvertisementType( ) {
return ContentAdvertisement.getAdvertisementType();
}
/**
* {@inheritDoc}
*/
public Advertisement newInstance( ) {
return new ContentAdvertisementImpl();
}
/**
* {@inheritDoc}
*/
public Advertisement newInstance( net.jxta.document.Element root ) {
return new ContentAdvertisementImpl( root );
}
};
public ContentAdvertisementImpl() {
// set defaults
setContentID( null );
setMetaID( null );
}
public ContentAdvertisementImpl( Element root ) {
if( !XMLElement.class.isInstance( root ) )
throw new IllegalArgumentException(
getClass().getName() + " only supports XMLElement" );
XMLElement doc = (XMLElement) root;
String doctype = doc.getName();
String typedoctype = "";
Attribute itsType = doc.getAttribute( "type" );
if( null != itsType )
typedoctype = itsType.getValue();
if( !doctype.equals(getAdvertisementType())
&& !getAdvertisementType().equals(typedoctype) ) {
throw new IllegalArgumentException("Could not construct : "
+ getClass().getName() + "from doc containing a "
+ doc.getName() );
}
Enumeration elements = doc.getChildren();
while (elements.hasMoreElements()) {
XMLElement elem = (XMLElement) elements.nextElement();
if ((!handleElement( elem ))
&& Logging.SHOW_FINE && LOG.isLoggable(Level.FINE)) {
LOG.fine( "Unhandled Element: " + elem.toString());
}
}
// Sanity Check!!!
}
/**
* {@inheritDoc}
*/
@Override
protected boolean handleElement( Element raw ) {
if ( super.handleElement( raw ) )
return true;
XMLElement elem = (XMLElement) raw;
String nm = elem.getName();
MimeMediaType mimeType;
String str;
URI uri;
if (nm.equals(contentIDTag)) {
try {
uri = new URI( elem.getTextValue() );
setContentID((ContentID) IDFactory.fromURI( uri ));
} catch ( URISyntaxException badID ) {
throw new IllegalArgumentException(
"Bad Content ID in advertisement", badID);
}
return true;
}
if (nm.equals(metaIDTag)) {
try {
uri = new URI( elem.getTextValue() );
setMetaID((ContentID) IDFactory.fromURI( uri ));
} catch ( URISyntaxException badID ) {
throw new IllegalArgumentException(
"Bad Meta ID in advertisement", badID);
}
return true;
}
if (nm.equals(docMimeTag)) {
str = elem.getTextValue();
mimeType = new MimeMediaType(str);
setMimeType(mimeType);
return true;
}
return false;
}
/**
* {@inheritDoc}
*/
@Override
public Document getDocument( MimeMediaType encodeAs ) {
StructuredDocument adv = (StructuredDocument) super.getDocument( encodeAs );
Element e;
e = adv.createElement(contentIDTag, getContentID().toString());
adv.appendChild(e);
if (getMetaID() != null) {
e = adv.createElement(metaIDTag, getMetaID().toString());
adv.appendChild(e);
}
if (getMimeType() != null) {
e = adv.createElement(docMimeTag, getMimeType().toString());
adv.appendChild(e);
}
return adv;
}
/**
* {@inheritDoc}
*/
public String [] getIndexFields() {
return fields;
}
}