/* The contents of this file are subject to the license and copyright terms
* detailed in the license directory at the root of the source tree (also
* available online at http://fedora-commons.org/license/).
*/
package org.fcrepo.server.storage.service;
import java.io.InputStream;
import java.util.HashMap;
import java.util.StringTokenizer;
import java.util.Vector;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.Attributes;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.DefaultHandler;
import org.fcrepo.common.Constants;
import org.fcrepo.server.errors.ObjectIntegrityException;
import org.fcrepo.server.errors.RepositoryConfigurationException;
import org.fcrepo.server.storage.types.DeploymentDSBindRule;
import org.fcrepo.server.storage.types.DeploymentDSBindSpec;
/**
* A class for parsing the special XML format in Fedora for a Datastream Input
* Specification (DSInputSpec). A DSInputSpec exists within a Service Deployment
* Object, and is used to define the "data contract" between the service
* represented by the deployment and a data object.
*
* @author Sandy Payette
* @version $Id$
*/
public class DSInputSpecParser
extends DefaultHandler
implements Constants {
/**
* URI-to-namespace prefix mapping info from SAX2 startPrefixMapping events.
*/
private HashMap<String, String> nsPrefixMap;
private boolean inDSInputLabel = false;
private boolean inDSInputInstructions = false;
private boolean inDSInputMIME = false;
// Fedora Datastream Binding Spec objects
private DeploymentDSBindSpec dsInputSpec;
private DeploymentDSBindRule dsInputRule;
private final String sDepPID;
// Working variables...
private Vector<DeploymentDSBindRule> tmp_InputRules;
/**
* Constructor to enable another class to initiate the parsing
*/
public DSInputSpecParser(String parentPID) {
sDepPID = parentPID;
}
/**
* Constructor allows this class to initiate the parsing
*/
public DSInputSpecParser(String parentPID, InputStream in)
throws RepositoryConfigurationException, ObjectIntegrityException {
sDepPID = parentPID;
XMLReader xmlReader = null;
try {
SAXParserFactory saxfactory = SAXParserFactory.newInstance();
saxfactory.setValidating(false);
SAXParser parser = saxfactory.newSAXParser();
xmlReader = parser.getXMLReader();
xmlReader.setContentHandler(this);
xmlReader.setFeature("http://xml.org/sax/features/namespaces",
false);
xmlReader
.setFeature("http://xml.org/sax/features/namespace-prefixes",
false);
} catch (Exception e) {
throw new RepositoryConfigurationException("Internal SAX error while "
+ "preparing for DSInputSpec datastream deserialization: "
+ e.getMessage());
}
try {
xmlReader.parse(new InputSource(in));
} catch (Exception e) {
throw new ObjectIntegrityException("Error parsing DSInputSpec datastream"
+ e.getClass().getName() + ": " + e.getMessage());
}
}
public DeploymentDSBindSpec getServiceDSInputSpec() {
return dsInputSpec;
}
@Override
public void startDocument() throws SAXException {
nsPrefixMap = new HashMap<String, String>();
tmp_InputRules = new Vector<DeploymentDSBindRule>();
dsInputSpec = new DeploymentDSBindSpec();
}
@Override
public void endDocument() throws SAXException {
dsInputSpec.dsBindRules =
(DeploymentDSBindRule[]) tmp_InputRules
.toArray(new DeploymentDSBindRule[0]);
tmp_InputRules = null;
nsPrefixMap = null;
}
@Override
public void startPrefixMapping(String prefix, String uri)
throws SAXException {
nsPrefixMap.put(uri, prefix);
}
@Override
public void skippedEntity(String name) throws SAXException {
StringBuffer sb = new StringBuffer();
sb.append('&');
sb.append(name);
sb.append(';');
char[] text = new char[sb.length()];
sb.getChars(0, sb.length(), text, 0);
characters(text, 0, text.length);
}
@Override
public void characters(char ch[], int start, int length)
throws SAXException {
if (inDSInputLabel) {
dsInputRule.bindingLabel = new String(ch, start, length);
} else if (inDSInputInstructions) {
dsInputRule.bindingInstruction = new String(ch, start, length);
} else if (inDSInputMIME) {
StringTokenizer st =
new StringTokenizer(new String(ch, start, length), " ");
String[] MIMETypes = new String[st.countTokens()];
for (int i = 0; i < MIMETypes.length; i++) {
MIMETypes[i] = st.nextToken();
}
dsInputRule.bindingMIMETypes = MIMETypes;
}
}
@Override
public void startElement(String namespaceURI,
String localName,
String qName,
Attributes attrs) throws SAXException {
if (namespaceURI.equalsIgnoreCase(BINDING_SPEC.uri)
&& localName.equalsIgnoreCase("DSInputSpec")) {
dsInputSpec.serviceDeploymentPID = sDepPID;
dsInputSpec.bindSpecLabel = attrs.getValue("label");
} else if (namespaceURI.equalsIgnoreCase(BINDING_SPEC.uri)
&& localName.equalsIgnoreCase("DSInput")) {
dsInputRule = new DeploymentDSBindRule();
if (attrs.getValue("pid") != null) {
dsInputRule.pid = attrs.getValue("pid");
}
dsInputRule.bindingKeyName = attrs.getValue("wsdlMsgPartName");
dsInputRule.maxNumBindings =
new Integer(attrs.getValue("DSMax")).intValue();
dsInputRule.minNumBindings =
new Integer(attrs.getValue("DSMin")).intValue();
dsInputRule.ordinality =
Boolean.parseBoolean(attrs.getValue("DSOrdinality"));
} else if (namespaceURI.equalsIgnoreCase(BINDING_SPEC.uri)
&& localName.equalsIgnoreCase("DSInputLabel")) {
inDSInputLabel = true;
} else if (namespaceURI.equalsIgnoreCase(BINDING_SPEC.uri)
&& localName.equalsIgnoreCase("DSInputInstruction")) {
inDSInputInstructions = true;
} else if (namespaceURI.equalsIgnoreCase(BINDING_SPEC.uri)
&& localName.equalsIgnoreCase("DSMIME")) {
inDSInputMIME = true;
}
}
@Override
public void endElement(String namespaceURI, String localName, String qName)
throws SAXException {
if (namespaceURI.equalsIgnoreCase(BINDING_SPEC.uri)
&& localName.equalsIgnoreCase("DSInputSpec")) {
} else if (namespaceURI.equalsIgnoreCase(BINDING_SPEC.uri)
&& localName.equalsIgnoreCase("DSInput")) {
tmp_InputRules.add(dsInputRule);
dsInputRule = null;
} else if (namespaceURI.equalsIgnoreCase(BINDING_SPEC.uri)
&& localName.equalsIgnoreCase("DSInputLabel")) {
inDSInputLabel = false;
} else if (namespaceURI.equalsIgnoreCase(BINDING_SPEC.uri)
&& localName.equalsIgnoreCase("DSInputInstruction")) {
inDSInputInstructions = false;
} else if (namespaceURI.equalsIgnoreCase(BINDING_SPEC.uri)
&& localName.equalsIgnoreCase("DSMIME")) {
inDSInputMIME = false;
}
}
}