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/*
* Copyright (c) 2001-2007 Sun Microsystems, Inc. All rights reserved.
*
* The Sun Project JXTA(TM) Software License
*
* 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 :
* 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.protocol;
import net.jxta.document.Element;
import net.jxta.document.ExtendableAdvertisement;
import net.jxta.document.MimeMediaType;
import net.jxta.document.StructuredDocument;
import net.jxta.document.StructuredDocumentFactory;
import net.jxta.document.StructuredDocumentUtils;
import net.jxta.id.ID;
import net.jxta.platform.ModuleSpecID;
/**
* A ModuleImplAdvertisement describes one of any number of published
* implementations for a given specification.
*
* Module specifications are referenced by their ModuleSpecID. Given a
* ModuleSpecID, a ModuleImplAdvertisement may be searched by means of JXTA
* Discovery, filtered according to the compatibility statement it contains,
* and if compatible, loaded and initialized. The {@code loadModule()} method of
* PeerGroup performs this task automatically, given a ModuleSpecID.
*
* One significant example of Modules referenced and loaded in that manner are
* the services and protocols that constitute a StdPeerGroup in the Java
* reference implementation.
*
* @see net.jxta.id.ID
* @see net.jxta.platform.ModuleSpecID
* @see net.jxta.document.Advertisement
* @see net.jxta.document.StructuredDocument
* @see net.jxta.document.Element
* @see net.jxta.protocol.ModuleSpecAdvertisement
* @see net.jxta.peergroup.PeerGroup
*/
public abstract class ModuleImplAdvertisement extends ExtendableAdvertisement implements Cloneable {
private ModuleSpecID msid = null;
private StructuredDocument description = null;
private StructuredDocument compat = null;
private String code = null;
private String uri = null;
private String provider = null;
private StructuredDocument param = null;
/**
* Returns the identifying type of this Advertisement.
*
* @return String the type of advertisement
*/
public static String getAdvertisementType() {
return "jxta:MIA";
}
/**
* {@inheritDoc}
*/
@Override
public final String getBaseAdvType() {
return getAdvertisementType();
}
/**
* Clone this ModuleImplAdvertisement
*/
@Override
public ModuleImplAdvertisement clone() {
try {
ModuleImplAdvertisement clone = (ModuleImplAdvertisement) super.clone();
clone.setModuleSpecID(getModuleSpecID());
clone.setDesc(getDescPriv());
clone.setCompat(getCompatPriv());
clone.setCode(getCode());
clone.setUri(getUri());
clone.setProvider(getProvider());
clone.setParam(getParamPriv());
return clone;
} catch (CloneNotSupportedException impossible) {
throw new Error("Object.clone() threw CloneNotSupportedException", impossible);
}
}
/**
* Returns the unique ID of that advertisement for indexing purposes.
* In that case we do not have any particular one to offer. Let the indexer
* hash the document.
*
* @return ID the unique id
*/
@Override
public ID getID() {
return null;
}
/**
* Returns the id of the spec that this implements.
* @return ID the spec id
*
*/
public ModuleSpecID getModuleSpecID() {
return msid;
}
/**
* Sets the id of the spec that is implemented
*
* @param msid The id of the spec
*/
public void setModuleSpecID(ModuleSpecID msid) {
this.msid = msid;
}
/**
* returns the description
*
* @return String the description
*/
public String getDescription() {
if (null != description) {
return (String) description.getValue();
} else {
return null;
}
}
/**
* sets the description
*
* @param description the description
*/
public void setDescription(String description) {
if (null != description) {
StructuredDocument newdoc = StructuredDocumentFactory.newStructuredDocument(MimeMediaType.XMLUTF8, "Desc", description);
setDesc(newdoc);
} else {
this.description = null;
}
}
/**
* returns the description
*
* @return the description
*/
public StructuredDocument getDesc() {
if (null != description) {
StructuredDocument newDoc = StructuredDocumentUtils.copyAsDocument(description);
return newDoc;
} else {
return null;
}
}
/**
* Privileged version of {@link #getDesc()} that does not clone the elements.
*
* @return the description
*/
public StructuredDocument getDescPriv() {
return description;
}
/**
* sets the description
*
* @param desc the description
*/
public void setDesc(Element desc) {
if (null != desc) {
this.description = StructuredDocumentUtils.copyAsDocument(desc);
} else {
this.description = null;
}
}
/**
* Returns the opaque compatibility statement for this advertisement. Each
* JXTA implementation has the ability to recognize and evaluate it's own
* compatibility statements (even though it may not be able to evaluate the
* compatibility statements of other implementations).
*
* @return The compatibility statement as a StructuredDocument of
* unspecified content.
*/
public StructuredDocument getCompat() {
return (compat == null ? null : StructuredDocumentUtils.copyAsDocument(compat));
}
/**
* Privileged version of {@link #getCompat()} that does not clone the elements.
*
* @return The compatibility statement as a StructuredDocument of
* unspecified content.
*/
protected StructuredDocument getCompatPriv() {
return compat;
}
/**
* Sets the module impl. compatibility statement.
*
* @param compat Element of an unspecified content.
*/
public void setCompat(Element compat) {
this.compat = (compat == null ? null : StructuredDocumentUtils.copyAsDocument(compat));
}
/**
* returns the code; a reference to or representation of the executable code
* advertised by this advertisement.
*
* The appropriate interpretation of the code value is dependant upon the
* compatibility statement. Any compatible consumer of this advertisement
* will be able to correctly interpret code value. The standard group
* implementations of the JXSE reference implementation expect it to be a
* reference to a jar file.
*
* @return A reference to the executable code described by this
* advertisement.
*/
public String getCode() {
return code;
}
/**
* Sets the reference for the executable code described by this
* advertisement.
*
* @param code A reference to the executable code described by this
* advertisement.
*/
public void setCode(String code) {
this.code = code;
}
/**
* returns the uri; that is a reference to or representation of a package
* from which the executable code referenced by the getCode method may be
* loaded.
*
* The appropriate interpretation of the URI value is dependant upon the
* compatibility statement. Any compatible consumer of this advertisement
* will be able to correctly interpret the URI value. The standard group
* implementations of the JXSE reference implementation expect it to be a
* reference to a jar file.
*
* @return Location URI for the code described by this advertisement.
*/
public String getUri() {
return uri;
}
/**
* Sets the uri
*
* @param uri Location URI for the code described by this advertisement.
*/
public void setUri(String uri) {
this.uri = uri;
}
/**
* returns the provider
*
* @return String the provider
*/
public String getProvider() {
return provider;
}
/**
* sets the provider
*
* @param provider the provider
*/
public void setProvider(String provider) {
this.provider = provider;
}
/**
* returns the param element.
*
* The interpretation of the param element is entirely up to the code
* that this advertises. One valid use of it is to enable the code to
* be configured so that multiple specs or multiple implementations of
* one spec may use the same code.
*
* @return A standalone structured document of unspecified content.
*/
public StructuredDocument getParam() {
return (param == null ? null : StructuredDocumentUtils.copyAsDocument(param));
}
/**
* Privileged version of {@link #getParam()} that does not clone the elements.
*
* @return A standalone structured document of unspecified content.
*/
protected StructuredDocument getParamPriv() {
return param;
}
/**
* Sets the module param
*
* @param param Element of an unspecified content.
*/
public void setParam(Element param) {
this.param = (param == null ? null : StructuredDocumentUtils.copyAsDocument(param));
}
}
