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package com.sun.tools.xjc.reader.internalizer;
import com.sun.istack.SAXParseException2;
import org.xml.sax.Attributes;
import org.xml.sax.Locator;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import org.xml.sax.helpers.XMLFilterImpl;
import java.io.File;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
/**
* XMLFilter that finds references to other schema files from
* SAX events.
*
* This implementation is a base implementation for typical case
* where we just need to look for a particular attribute which
* contains an URL to another schema file.
*
* @author Kohsuke Kawaguchi ([email protected])
*/
public abstract class AbstractReferenceFinderImpl extends XMLFilterImpl {
protected final DOMForest parent;
protected AbstractReferenceFinderImpl(DOMForest _parent) {
this.parent = _parent;
}
/**
* IF the given element contains a reference to an external resource,
* return its URL.
*
* @param nsURI Namespace URI of the current element
* @param localName Local name of the current element
* @return It's OK to return a relative URL.
*/
protected abstract String findExternalResource(String nsURI, String localName, Attributes atts);
@Override
public void startElement(String namespaceURI, String localName, String qName, Attributes atts)
throws SAXException {
super.startElement(namespaceURI, localName, qName, atts);
String relativeRef = findExternalResource(namespaceURI, localName, atts);
if (relativeRef == null) {
return; // not found
}
try {
// absolutize URL.
String lsi = locator.getSystemId();
String ref;
URI relRefURI = new URI(relativeRef);
if (relRefURI.isAbsolute())
ref = relativeRef;
else {
if (lsi.startsWith("jar:")) {
int bangIdx = lsi.indexOf('!');
if (bangIdx > 0) {
ref = lsi.substring(0, bangIdx + 1)
+ new URI(lsi.substring(bangIdx + 1)).resolve(new URI(relativeRef)).toString();
} else {
ref = relativeRef;
}
} else {
ref = new URI(lsi).resolve(new URI(relativeRef)).toString();
}
}
// then parse this schema as well,
// but don't mark this document as a root.
if (parent != null) { // this is there to allow easier testing
parent.parse(ref, false);
}
} catch (URISyntaxException e) {
String msg = e.getMessage();
if (new File(relativeRef).exists()) {
msg = Messages.format(Messages.ERR_FILENAME_IS_NOT_URI) + ' ' + msg;
}
SAXParseException spe = new SAXParseException2(
Messages.format(Messages.ERR_UNABLE_TO_PARSE, relativeRef, msg),
locator, e);
fatalError(spe);
throw spe;
} catch (IOException e) {
SAXParseException spe = new SAXParseException2(
Messages.format(Messages.ERR_UNABLE_TO_PARSE, relativeRef, e.getMessage()),
locator, e);
fatalError(spe);
throw spe;
}
}
private Locator locator;
@Override
public void setDocumentLocator(Locator locator) {
super.setDocumentLocator(locator);
this.locator = locator;
}
}