saxunmarshallerhandlerimpl.java

这是一个基于计算网格的web service。它用java编写。一旦安装完成

//
// This file was generated by the JavaTM Architecture for XML Binding(JAXB) Reference Implementation, v1.0.4-b18-fcs 
// See <a href="http://java.sun.com/xml/jaxb">http://java.sun.com/xml/jaxb</a> 
// Any modifications to this file will be lost upon recompilation of the source schema. 
// Generated on: 2005.07.17 at 02:32:56 EDT 
//

package jwsgrid.xsd.jobdescription.impl.runtime;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.List;

import javax.xml.XMLConstants;
import javax.xml.bind.JAXBException;
import javax.xml.bind.UnmarshalException;
import javax.xml.bind.ValidationEvent;
import javax.xml.bind.ValidationEventHandler;

import org.xml.sax.Attributes;
import org.xml.sax.Locator;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;

import com.sun.xml.bind.JAXBAssertionError;
import com.sun.xml.bind.unmarshaller.Messages;
import com.sun.xml.bind.unmarshaller.Tracer;
import com.sun.xml.bind.util.AttributesImpl;

/**
 * Implementation of {@link UnmarshallerHandler}.
 * 
 * This object converts SAX events into unmarshaller events and
 * cooridnates the entire unmarshalling process.
 *
 * @author
 *  <a href="mailto:[e-mail]">Kohsuke KAWAGUCHI</a>
 */
public class SAXUnmarshallerHandlerImpl
    implements SAXUnmarshallerHandler, UnmarshallingContext
{
    /**
     * This flag is set to true at the startDocument event
     * and false at the endDocument event.
     * 
     * Until the first document is unmarshalled, we don't
     * want to return an object. So this variable is initialized
     * to true.
     */
    private boolean isUnmarshalInProgress = true;
    
    
    
    public SAXUnmarshallerHandlerImpl( UnmarshallerImpl _parent, GrammarInfo _gi ) {
        this.parent = _parent;
        grammarInfo = _gi;
        startPrefixMapping("",""); // by default, the default ns is bound to "".
     }
    
    private final GrammarInfo grammarInfo;
    public GrammarInfo getGrammarInfo() { return grammarInfo; }
    
    /**
     * Returns true if we should be collecting characters in the current element.
     */
    private final boolean shouldCollectText() {
        return collectText[stackTop];
    }
    
    public void startDocument() throws SAXException {
        // reset the object
        result = null;
        handlerLen=0;
        patchers=null;
        patchersLen=0;
        aborted = false;
        isUnmarshalInProgress = true;
        
        stackTop=0;
        elementDepth=1;
    }
    
    public void endDocument() throws SAXException {
        runPatchers();
        isUnmarshalInProgress = false;
    }
    
    public void startElement( String uri, String local, String qname, Attributes atts )
            throws SAXException {
        
        // work gracefully with misconfigured parsers that don't support namespaces
        if( uri==null )
            uri="";
        if( local==null || local.length()==0 )
            local=qname;
        if( qname==null || qname.length()==0 )
            qname=local;
        
        if(result==null) {
            // this is the root element.
            // create a root object and start unmarshalling
            UnmarshallingEventHandler unmarshaller =
                grammarInfo.createUnmarshaller(uri,local,this);
            if(unmarshaller==null) {
                // the registry doesn't know about this element.
                //
                // the no.1 cause of this problem is that your application is configuring
                // an XML parser by your self and you forgot to call
                // the SAXParserFactory.setNamespaceAware(true). When this happens, you see
                // the namespace URI is reported as empty whereas you expect something else.
                throw new SAXParseException(
                    Messages.format( Messages.UNEXPECTED_ROOT_ELEMENT2,
                        uri, local, computeExpectedRootElements() ),
                    getLocator() );
            }
            result = unmarshaller.owner();

            pushContentHandler(unmarshaller,0);
        }
    
        processText(true);
    
        getCurrentHandler().enterElement(uri,local,qname,atts);
    }

    public final void endElement( String uri, String local, String qname )
            throws SAXException {
        
        // work gracefully with misconfigured parsers that don't support namespaces
        if( uri==null )
            uri="";
        if( local==null || local.length()==0 )
            local=qname;
        if( qname==null || qname.length()==0 )
            qname=local;
        
        processText(false);
        getCurrentHandler().leaveElement(uri,local,qname);
    }
    
    
    
    
    
    /** Root object that is being unmarshalled. */
    private Object result;
    public Object getResult() throws UnmarshalException {
        if(isUnmarshalInProgress)
            throw new IllegalStateException();
        
        if(!aborted)       return result;
        
        // there was an error.
        throw new UnmarshalException((String)null);
    }

    
    
//
//
// handler stack maintainance
//
//
    private UnmarshallingEventHandler[] handlers = new UnmarshallingEventHandler[16];
    private int[] mementos = new int[16];
    private int handlerLen=0;
    
    public void pushContentHandler( UnmarshallingEventHandler handler, int memento ) {
        if(handlerLen==handlers.length) {
            // expand buffer
            UnmarshallingEventHandler[] h = new UnmarshallingEventHandler[handlerLen*2];
            int[] m = new int[handlerLen*2];
            System.arraycopy(handlers,0,h,0,handlerLen);
            System.arraycopy(mementos,0,m,0,handlerLen);
            handlers = h;
            mementos = m;
        }
        handlers[handlerLen] = handler;
        mementos[handlerLen] = memento;
        handlerLen++;
    }
    
    public void popContentHandler() throws SAXException {
        handlerLen--;
        handlers[handlerLen]=null;  // this handler is removed
        getCurrentHandler().leaveChild(mementos[handlerLen]);
    }

    public UnmarshallingEventHandler getCurrentHandler() {
        return handlers[handlerLen-1];
    }


//
//
// text handling
//
//    
    private StringBuffer buffer = new StringBuffer();
    
    protected void consumeText( String str, boolean ignorable ) throws SAXException {
         if(ignorable && str.trim().length()==0)
            // if we are allowed to ignore text and
            // the text is ignorable, ignore.
            return;
        
        // otherwise perform a transition by this token.
        getCurrentHandler().text(str);
    }
    private void processText( boolean ignorable ) throws SAXException {
        if( shouldCollectText() )
            consumeText(buffer.toString(),ignorable);
        
        // avoid excessive object allocation, but also avoid
        // keeping a huge array inside StringBuffer.
        if(buffer.length()<1024)    buffer.setLength(0);
        else                        buffer = new StringBuffer();
    }
    
    public final void characters( char[] buf, int start, int len ) {
        if( shouldCollectText() )
            buffer.append(buf,start,len);
    }

    public final void ignorableWhitespace( char[] buf, int start, int len ) {
        characters(buf,start,len);
    }



    
//
//
// namespace binding maintainance
//
//
    private String[] nsBind = new String[16];
    private int nsLen=0;
    
    // in the current scope, nsBind[0] - nsBind[idxStack[idxStackTop]-1]
    // are active.
    // use {@link #elementDepth} and {@link stackTop} to access.
    private int[] idxStack = new int[16];
    
    public void startPrefixMapping( String prefix, String uri ) {
        if(nsBind.length==nsLen) {
            // expand the buffer
            String[] n = new String[nsLen*2];
            System.arraycopy(nsBind,0,n,0,nsLen);
            nsBind=n;
        }
        nsBind[nsLen++] = prefix;
        nsBind[nsLen++] = uri;
    }
    public void endPrefixMapping( String prefix ) {
        nsLen-=2;
    }
    public String resolveNamespacePrefix( String prefix ) {
        if(prefix.equals("xml"))
            return "http://www.w3.org/XML/1998/namespace";
        
        for( int i=idxStack[stackTop]-2; i>=0; i-=2 ) {
            if(prefix.equals(nsBind[i]))
                return nsBind[i+1];
        }
        return null;
    }
    public String[] getNewlyDeclaredPrefixes() {
        return getPrefixList( idxStack[stackTop-1] );
    }

    public String[] getAllDeclaredPrefixes() {
        return getPrefixList( 2 );  // skip the default ""->"" mapping
    }
    
    private String[] getPrefixList( int startIndex ) {
        int size = (idxStack[stackTop]-startIndex)/2;
        String[] r = new String[size];
        for( int i=0; i<r.length; i++ )
            r[i] = nsBind[startIndex+i*2];
        return r;
    }

    
    //
    //  NamespaceContext2 implementation 
    //
    public Iterator getPrefixes(String uri) {
        // wrap it into unmodifiable list so that the remove method
        // will throw UnsupportedOperationException.
        return Collections.unmodifiableList(
            getAllPrefixesInList(uri)).iterator();
    }
    
    private List getAllPrefixesInList(String uri) {
        List a = new ArrayList();
        
        if( uri.equals(XMLConstants.XML_NS_URI) ) {
            a.add(XMLConstants.XML_NS_PREFIX);
            return a;
        }
        if( uri.equals(XMLConstants.XMLNS_ATTRIBUTE_NS_URI) ) {
            a.add(XMLConstants.XMLNS_ATTRIBUTE);
            return a;
        }
        if( uri==null )
            throw new IllegalArgumentException();
          
        for( int i=nsLen-2; i>=0; i-=2 )
            if(uri.equals(nsBind[i+1]))