/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.oodt.profile;
import com.hp.hpl.jena.rdf.model.Model;
import com.hp.hpl.jena.rdf.model.ModelFactory;
import com.hp.hpl.jena.rdf.model.Property;
import com.hp.hpl.jena.rdf.model.Resource;
import java.io.IOException;
import java.io.Serializable;
import java.net.URI;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.apache.oodt.commons.Configuration;
import org.apache.oodt.commons.util.Documentable;
import org.apache.oodt.commons.util.XML;
import org.w3c.dom.DOMException;
import org.w3c.dom.Document;
import org.w3c.dom.DocumentType;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.OutputStreamWriter;
/**
* A profile.
*
* Objects of this class are profiles. Profiles are metadata descriptions of resources.
*
* @author Kelly
*/
public class Profile implements Serializable, Cloneable, Comparable, Documentable {
/** Serial version unique ID. */
static final long serialVersionUID = -3936851809184360591L;
/** The formal public identifier of the profiles DTD. */
public static final String PROFILES_DTD_FPI = "-//JPL//DTD Profile 1.1//EN";
/** The system identifier of the profiles DTD. */
public static String PROFILES_DTD_URL = "http://oodt.jpl.nasa.gov/grid-profile/dtd/prof.dtd";
/**
* Create a list of profiles by deserializing data from the given XML element.
*
* @param root Either a <profiles> or a <profile> element.
* @param factory Factory for creation of profile-related objects.
* @return A list of profiles.
*/
public static List createProfiles(Element root, ObjectFactory factory) {
List profiles = new ArrayList();
if ("profile".equals(root.getNodeName()))
// The root is a <profile>, so add the single profile to the list.
profiles.add(factory.createProfile((Element) root));
else if ("profiles".equals(root.getNodeName())) {
// The root is a <profiles>, so add each <profile> to the list.
NodeList children = root.getChildNodes();
for (int i = 0; i < children.getLength(); ++i) {
Node node = children.item(i);
if ("profile".equals(node.getNodeName()))
profiles.add(factory.createProfile((Element) node));
}
} else throw new IllegalArgumentException("Expected a <profiles> or <profile> top level element but got "
+ root.getNodeName());
return profiles;
}
/**
* Create a list of profiles by deserializing data from the given XML element.
*
* This method uses the default factory that yields objects of this package,
* namely {@link Profile}, {@link ProfileAttributes}, {@link ResourceAttributes},
* and {@link ProfileElement} and its subclasses.
*
* @param root Either a <profiles> or a <profile> element.
* @return A list of profiles.
*/
public static List createProfiles(Element root) {
return createProfiles(root, new DefaultFactory());
}
/**
* Create a blank profile.
*/
public Profile() {
profAttr = new ProfileAttributes();
resAttr = new ResourceAttributes(this);
}
/**
* Create a profile from an XML document.
*
* @param string The XML document (as a string).
* @throws SAXException If the <var>string</var> can't be parsed.
*/
public Profile(String string) throws SAXException {
this(XML.parse(string).getDocumentElement(), new DefaultFactory());
}
/**
* Create a profile from an XML document.
*
* @param string The XML document (as a string).
* @param factory Object factory to use.
* @throws SAXException If the <var>string</var> can't be parsed.
*/
public Profile(String string, ObjectFactory factory) throws SAXException {
this(XML.parse(string).getDocumentElement(), factory);
}
/**
* Creates a new <code>Profile</code> instance.
*
* @param root a <code>Node</code> value.
*/
public Profile(Node root) {
this(root, new DefaultFactory());
}
/**
* Create a profile from an XML document.
*
* @param root The <profile> element.
*/
public Profile(Node root, ObjectFactory factory) {
if (!root.getNodeName().equals("profile"))
throw new IllegalArgumentException("Construct a Profile from a <profile> element, not a <"
+ root.getNodeName() + ">");
NodeList children = root.getChildNodes();
for (int i = 0; i < children.getLength(); ++i) {
Node node = children.item(i);
if ("profAttributes".equals(node.getNodeName()))
profAttr = factory.createProfileAttributes((Element) node);
else if ("resAttributes".equals(node.getNodeName()))
resAttr = factory.createResourceAttributes(this, (Element) node);
else if ("profElement".equals(node.getNodeName())) {
ProfileElement element = ProfileElement.createProfileElement((Element) node, this, factory);
elements.put(element.getName(), element);
}
}
}
/**
* Create a profile from its attributes.
*
* @param profAttr Profile attributes.
* @param resAttr Resource attributes.
*/
public Profile(ProfileAttributes profAttr, ResourceAttributes resAttr) {
this.profAttr = profAttr;
this.resAttr = resAttr;
if (this.resAttr != null) this.resAttr.profile = this;
}
public int hashCode() {
return profAttr.hashCode();
}
public boolean equals(Object rhs) {
if (rhs == this) return true;
if (rhs == null || !(rhs instanceof Profile)) return false;
Profile obj = (Profile) rhs;
return profAttr.equals(obj.profAttr);
}
public int compareTo(Object rhs) {
Profile obj = (Profile) rhs;
return profAttr.compareTo(obj.profAttr);
}
public String toString() {
Document doc = createProfileDocument();
doc.removeChild(doc.getDocumentElement());
doc.appendChild(toXML(doc));
return XML.serialize(doc);
}
public Object clone() {
Object clone = null;
try {
clone = super.clone();
} catch (CloneNotSupportedException cantHappen) {}
return clone;
}
/**
* Get the profile attributes.
*
* @return The profile attributes.
*/
public ProfileAttributes getProfileAttributes() {
return profAttr;
}
/**
* Get the resource attributes.
*
* @return The resource attributes.
*/
public ResourceAttributes getResourceAttributes() {
return resAttr;
}
/**
* Set this profile's profile attributes.
*
* @param profAttr a <code>ProfileAttributes</code> value.
*/
public void setProfileAttributes(ProfileAttributes profAttr) {
this.profAttr = profAttr;
}
/**
* Set this profile's resource attributes.
*
* @param resAttr a <code>ResourceAttributes</code> value.
*/
public void setResourceAttributes(ResourceAttributes resAttr) {
this.resAttr = resAttr;
}
/**
* Get the profile elements.
*
* The profile elements are a mapping from the element name ({@link
* java.lang.String}) to {@link ProfileElement}.
*
* @return The profile elements.
*/
public Map getProfileElements() {
return elements;
}
public URI getURI() {
return resAttr.getURI();
}
/**
* Add this profile as an RDF resource description to an RDF model.
*
* This creates a description of the resource that this profile describes, as well
* as additional resources for the reified statements about the profile itself,
* and adds them all to the given model.
*
* @param model Model to which to add the profile and its related descriptions.
*/
public void addToModel(Model model) {
Resource resource = model.createResource(getURI().toString());
resAttr.addToModel(model, resource, profAttr);
for (Iterator i = elements.values().iterator(); i.hasNext();) {
ProfileElement e = (ProfileElement) i.next();
e.addToModel(model, resource, profAttr);
}
}
/**
* Serialize this profile as an XML node.
*
* @param doc The document that will own this node.
* @return The XML element <profile> representing these attributes.
* @throws DOMException If an error occurs creating the XML nodes.
*/
public Node toXML(Document doc) throws DOMException {
return toXML(doc, /*withElements*/true);
}
/**
* Serialize this profile as an XML node but without any elements.
*
* @param doc The document that will own this node.
* @return The XML element <profile> representing these attributes.
* @throws DOMException If an error occurs creating the XML nodes.
*/
public Node toXMLWithoutElements(Document doc) throws DOMException {
return toXML(doc, /*withElements*/false);
}
/**
* Serialize this profile as an XML node.
*
* @param doc The document that will own this node.
* @param withElements Include the profile elements?
* @return The XML element <profile> representing these attributes.
* @throws DOMException If an error occurs creating the XML nodes.
*/
private Node toXML(Document doc, boolean withElements) throws DOMException {
Element profile = doc.createElement("profile");
profile.appendChild(profAttr.toXML(doc));
profile.appendChild(resAttr.toXML(doc));
if (withElements) for (Iterator i = elements.values().iterator(); i.hasNext();)
profile.appendChild(((ProfileElement) i.next()).toXML(doc));
return profile;
}
/**
* Create a <profiles> document using the profiles DTD.
*
* @return A <profiles> document with the profiles DTD.
*/
public static Document createProfilesDocument() {
return createDocument("profiles");
}
/**
* Create a <profile> document using the profiles DTD.
*
* @return A <profile> document with the profiles DTD.
*/
public static Document createProfileDocument() {
return createDocument("profile");
}
/**
* Create a document using the profiles DTD with the given root element.
*
* @param root Name of the root element.
* @return The document with the appropriate document type declaration.
*/
static Document createDocument(String root) {
DocumentType docType = XML.getDOMImplementation().createDocumentType(root, PROFILES_DTD_FPI, PROFILES_DTD_URL);
Document doc = XML.getDOMImplementation().createDocument(/*namespaceURI*/null, root, docType);
return doc;
}
/** My profile attributes. */
protected ProfileAttributes profAttr;
/** My resource attributes. */
protected ResourceAttributes resAttr;
/** My elements.
*
* This mapping is from element name (a {@link String}) to {@link ProfileElement}.
*/
protected Map elements = new HashMap();
/**
* Try to parse an XML profile in a file in its XML vocabulary. If successful,
* you get the profile as RDF document (in XML format) to the standard output
* after it's been digested by the profile class. If not, then you get an
* exception.
*
* @param argv Command-line arguments, of which there should be one, the name of XML file containing the profile to parse
* @throws Throwable if an error occurs.
*/
public static void main(String[] argv) throws Throwable {
if (argv.length != 1) {
System.err.println("Usage: <profile.xml>");
System.exit(1);
}
StringBuffer b = new StringBuffer();
BufferedReader reader = new BufferedReader(new FileReader(argv[0]));
char[] buf = new char[512];
int num;
while ((num = reader.read(buf)) != -1)
b.append(buf, 0, num);
reader.close();
Profile p = new Profile(b.toString());
Model model = ModelFactory.createDefaultModel();
p.addToModel(model);
OutputStreamWriter writer = new OutputStreamWriter(System.out);
model.write(writer);
writer.close();
System.exit(0);
}
}