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package com.sun.org.apache.xerces.internal.util;
import com.sun.org.apache.xerces.internal.impl.xs.util.SimpleLocator;
import com.sun.org.apache.xerces.internal.jaxp.validation.WrappedSAXException;
import com.sun.org.apache.xerces.internal.xni.QName;
import com.sun.org.apache.xerces.internal.xni.XMLAttributes;
import com.sun.org.apache.xerces.internal.xni.XMLDocumentHandler;
import com.sun.org.apache.xerces.internal.xni.XMLLocator;
import com.sun.org.apache.xerces.internal.xni.XMLString;
import com.sun.org.apache.xerces.internal.xni.parser.XMLDocumentSource;
import org.xml.sax.Attributes;
import org.xml.sax.ContentHandler;
import org.xml.sax.Locator;
import org.xml.sax.SAXException;
/**
* Receves SAX {@link ContentHandler} events
* and produces the equivalent {@link XMLDocumentHandler} events.
*
* @author
* Kohsuke Kawaguchi ([email protected])
*/
public class SAX2XNI implements ContentHandler, XMLDocumentSource {
public SAX2XNI( XMLDocumentHandler core ) {
this.fCore = core;
}
private XMLDocumentHandler fCore;
private final NamespaceSupport nsContext = new NamespaceSupport();
private final SymbolTable symbolTable = new SymbolTable();
public void setDocumentHandler(XMLDocumentHandler handler) {
fCore = handler;
}
public XMLDocumentHandler getDocumentHandler() {
return fCore;
}
//
//
// ContentHandler implementation
//
//
public void startDocument() throws SAXException {
try {
nsContext.reset();
XMLLocator xmlLocator;
if(locator==null)
// some SAX source doesn't provide a locator,
// in which case we assume no line information is available
// and use a dummy locator. With this, downstream components
// can always assume that they will get a non-null Locator.
xmlLocator=new SimpleLocator(null,null,-1,-1);
else
xmlLocator=new LocatorWrapper(locator);
fCore.startDocument(
xmlLocator,
null,
nsContext,
null);
} catch( WrappedSAXException e ) {
throw e.exception;
}
}
public void endDocument() throws SAXException {
try {
fCore.endDocument(null);
} catch( WrappedSAXException e ) {
throw e.exception;
}
}
public void startElement( String uri, String local, String qname, Attributes att ) throws SAXException {
try {
fCore.startElement(createQName(uri,local,qname),createAttributes(att),null);
} catch( WrappedSAXException e ) {
throw e.exception;
}
}
public void endElement( String uri, String local, String qname ) throws SAXException {
try {
fCore.endElement(createQName(uri,local,qname),null);
} catch( WrappedSAXException e ) {
throw e.exception;
}
}
public void characters( char[] buf, int offset, int len ) throws SAXException {
try {
fCore.characters(new XMLString(buf,offset,len),null);
} catch( WrappedSAXException e ) {
throw e.exception;
}
}
public void ignorableWhitespace( char[] buf, int offset, int len ) throws SAXException {
try {
fCore.ignorableWhitespace(new XMLString(buf,offset,len),null);
} catch( WrappedSAXException e ) {
throw e.exception;
}
}
public void startPrefixMapping( String prefix, String uri ) {
nsContext.pushContext();
nsContext.declarePrefix(prefix,uri);
}
public void endPrefixMapping( String prefix ) {
nsContext.popContext();
}
public void processingInstruction( String target, String data ) throws SAXException {
try {
fCore.processingInstruction(
symbolize(target),createXMLString(data),null);
} catch( WrappedSAXException e ) {
throw e.exception;
}
}
public void skippedEntity( String name ) {
}
private Locator locator;
public void setDocumentLocator( Locator _loc ) {
this.locator = _loc;
}
/** Creates a QName object. */
private QName createQName(String uri, String local, String raw) {
int idx = raw.indexOf(':');
if( local.length()==0 ) {
// if naemspace processing is turned off, local could be "".
// in that case, treat everything to be in the no namespace.
uri = "";
if(idx<0)
local = raw;
else
local = raw.substring(idx+1);
}
String prefix;
if (idx < 0)
prefix = null;
else
prefix = raw.substring(0, idx);
if (uri != null && uri.length() == 0)
uri = null; // XNI uses null whereas SAX uses the empty string
return new QName(symbolize(prefix), symbolize(local), symbolize(raw), symbolize(uri));
}
/** Symbolizes the specified string. */
private String symbolize(String s) {
if (s == null)
return null;
else
return symbolTable.addSymbol(s);
}
private XMLString createXMLString(String str) {
// with my patch
// return new XMLString(str);
// for now
return new XMLString(str.toCharArray(), 0, str.length());
}
/** only one instance of XMLAttributes is used. */
private final XMLAttributes xa = new XMLAttributesImpl();
/** Creates an XMLAttributes object. */
private XMLAttributes createAttributes(Attributes att) {
xa.removeAllAttributes();
int len = att.getLength();
for (int i = 0; i < len; i++)
xa.addAttribute(
createQName(att.getURI(i), att.getLocalName(i), att.getQName(i)),
att.getType(i),
att.getValue(i));
return xa;
}
}