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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 ContentHandler events and produces the equivalent XMLDocumentHandler events.
Author: Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)
/** * Receves SAX {@link ContentHandler} events * and produces the equivalent {@link XMLDocumentHandler} events. * * @author * Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com) */
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.
/** 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.
/** 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.
/** only one instance of XMLAttributes is used. */
private final XMLAttributes xa = new XMLAttributesImpl();
Creates an XMLAttributes object.
/** 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; } }