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package com.sun.enterprise.admin.wsmgmt.transform;
import com.sun.enterprise.admin.wsmgmt.config.spi.Constants;
import com.sun.enterprise.admin.wsmgmt.filter.spi.Filter;
import com.sun.enterprise.admin.wsmgmt.filter.spi.FilterContext;
import javax.xml.transform.stream.*;
import javax.xml.transform.*;
import com.sun.enterprise.admin.wsmgmt.SOAPMessageContext;
import javax.xml.soap.SOAPMessage;
import javax.xml.soap.MessageFactory;
import javax.xml.soap.SOAPPart;
import java.io.StringBufferInputStream;
import java.io.StringWriter;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import javax.xml.parsers.FactoryConfigurationError;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import org.xml.sax.InputSource;
import org.xml.sax.XMLReader;
import org.xml.sax.XMLFilter;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.sax.SAXTransformerFactory;
import javax.xml.transform.sax.SAXSource;
import javax.xml.transform.sax.SAXResult;
import javax.xml.transform.stream.StreamSource;
import javax.xml.transform.stream.StreamResult;
import java.io.File;
import java.util.LinkedList;
import java.util.List;
import java.util.HashMap;
import com.sun.enterprise.admin.wsmgmt.config.spi.TransformationRule;
import com.sun.enterprise.util.SystemPropertyConstants;
import java.util.logging.Logger;
import java.util.logging.Level;
import com.sun.logging.LogDomains;
import com.sun.enterprise.util.i18n.StringManager;
/**
* Ordered XSLT filter chain.
*/
public class FilterChain {
/**
* Public Constructor.
*
* @param appId name of the application
* @param endpoint end point name for which stats are collected
*/
public FilterChain(TransformationRule[] rules, boolean reverse)
throws TransformException {
try {
// Set up to the Transformer
SAXParserFactory spf = SAXParserFactory.newInstance();
SAXParser parser = spf.newSAXParser();
_reader = parser.getXMLReader();
_stf = (SAXTransformerFactory) TransformerFactory.newInstance();
_transformer = _stf.newTransformer();
setupTemplates(rules, reverse);
} catch(Exception e) {
throw new TransformException(e);
}
}
private synchronized void setupTemplates(TransformationRule[] tRules,
boolean reverse)
throws TransformException {
if ((tRules == null) || (tRules.length == 0)) {
return;
}
templatesData = new TemplatesData[tRules.length];
if (!reverse) {
for(int idx =0; idx < tRules.length; idx++) {
addTemplate(idx, tRules[idx]);
}
} else {
int index =0;
for(int idx = tRules.length -1; idx > -1; idx--) {
addTemplate(index, tRules[idx]);
index++;
}
}
}
private synchronized void addTemplate(int index, TransformationRule tRule)
throws TransformException {
try {
if (tRule == null) {
return;
}
String name = tRule.getName();
// check if the Rule File Location is relative, then prepend the
// instance root to the path
File stylesheet = new File(tRule.getRuleFileLocation());
if ( !stylesheet.isAbsolute()) {
// construct the absolute path
String instanceRoot = System.getProperty(
SystemPropertyConstants.INSTANCE_ROOT_PROPERTY);
stylesheet = new File( instanceRoot
+ File.separator+tRule.getRuleFileLocation());
}
// XMLFilter filter = _stf.newXMLFilter(new StreamSource(stylesheet));
templatesData[index] =
new TemplatesData(name, _stf.newTemplates(new StreamSource(stylesheet)));
// addToList(index,name,templates);
} catch(Exception e) {
String msg = _stringMgr.getString("rule_not_compiled",
tRule.getRuleFileLocation(), tRule.getName());
_logger.log(Level.WARNING, msg);
throw new TransformException(e);
}
}
private LinkedList getFilterList() throws TransformerConfigurationException {
LinkedList filterList = new LinkedList();
if (templatesData == null)
return filterList;
for (int i = 0; i < templatesData.length; i++) {
TemplatesData t = templatesData[i];
XMLFilter f = _stf.newXMLFilter(t.getTemplates());
addToList(filterList, i, f);
}
return filterList;
}
private void addToList(LinkedList filterList, int index, XMLFilter filter) {
XMLFilter parent = null;
if ( index == 0) {
filter.setParent(_reader);
} else {
parent = (XMLFilter) filterList.get(index-1);
filter.setParent(parent);
// check if child the exists
if ( filterList.size() -1 > index) {
XMLFilter child = (XMLFilter) filterList.get(index);
if ( child != null) {
child.setParent(filter);
}
}
}
filterList.add(index, filter);
}
/**
* Invoke the filter.
*
* @param context filter context
*/
public synchronized void process(FilterContext context)
throws TransformException, TransformerConfigurationException {
LinkedList filterList = getFilterList();
if (( filterList.size() == 0 ) || (context == null)) {
return;
}
try {
SOAPMessageContext smc = context.getMessageContext();
SOAPMessage sm = smc.getMessage();
SOAPPart sp = sm.getSOAPPart();
// gets the SOAP envelope as a JAXP Source object.
Source s = sp.getContent();
ByteArrayInputStream bis = null;
InputSource inputSrc;
if (s instanceof SAXSource) {
inputSrc = SAXSource.sourceToInputSource(s);
} else {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
TransformerFactory tf = TransformerFactory.newInstance();
Transformer xtransformer = tf.newTransformer();
xtransformer.transform(s, new StreamResult(bos));
byte[] buf = bos.toByteArray();
bos.flush();
bos.close();
bis = new ByteArrayInputStream(buf);
inputSrc = new InputSource(bis);
}
// Set up the transformer to process the SAX events generated
// by the last filter in the chain
//inputSrc = SAXSource.sourceToInputSource(s);
SAXSource transformSource = new SAXSource(
((XMLFilter)filterList.getLast()), inputSrc);
StringWriter sw = new StringWriter(STRING_WRITER_INIT_SIZE);
Result r = new StreamResult(sw);
_transformer.transform(transformSource, r);
// get the string from the result.
sw.flush();
sw.close();
if (bis != null)
bis.close();
StringBufferInputStream in = new StringBufferInputStream(
sw.toString());
MessageFactory mFactory = MessageFactory.newInstance();
SOAPMessage resMsg = mFactory.createMessage(null, in);
smc.setMessage(resMsg);
} catch(Exception e) {
_logger.fine("XSLT transformation failed for "
+ context.getFullyQualifiedName());
throw new TransformException(e);
}
}
// -- PRIVATE - VARIABLES -------------------------
XMLReader _reader = null;
SAXTransformerFactory _stf = null;
Transformer _transformer = null;
TemplatesData[] templatesData = null;
// intial size for StringWriter
static final int STRING_WRITER_INIT_SIZE = 4028;
private static final Logger _logger =
Logger.getLogger(LogDomains.ADMIN_LOGGER);
private static final StringManager _stringMgr =
StringManager.getManager(FilterChain.class);
}
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