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 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
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package com.sun.xml.bind.v2.runtime.output;

import java.io.IOException;

import javax.xml.stream.XMLStreamException;

import com.sun.xml.bind.util.AttributesImpl;
import com.sun.xml.bind.v2.runtime.XMLSerializer;

import org.xml.sax.ContentHandler;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.LocatorImpl;

/**
 * {@link XmlOutput} implementation that writes to SAX {@link ContentHandler}.
 *
 * @author Kohsuke Kawaguchi
 */
public class SAXOutput extends XmlOutputAbstractImpl {
    protected final ContentHandler out;

    public SAXOutput(ContentHandler out) {
        this.out = out;
        out.setDocumentLocator(new LocatorImpl());
    }

    private String elementNsUri,elementLocalName,elementQName;

    private char[] buf = new char[256];

    private final AttributesImpl atts = new AttributesImpl();


    // not called if we are generating fragments
    @Override
    public void startDocument(XMLSerializer serializer, boolean fragment, int[] nsUriIndex2prefixIndex, NamespaceContextImpl nsContext) throws SAXException, IOException, XMLStreamException {
        super.startDocument(serializer, fragment,nsUriIndex2prefixIndex,nsContext);
        if(!fragment)
            out.startDocument();
    }

    public void endDocument(boolean fragment) throws SAXException, IOException, XMLStreamException {
        if(!fragment)
            out.endDocument();
        super.endDocument(fragment);
    }

    public void beginStartTag(int prefix, String localName) {
        elementNsUri = nsContext.getNamespaceURI(prefix);
        elementLocalName = localName;
        elementQName = getQName(prefix,localName);
        atts.clear();
    }

    public void attribute(int prefix, String localName, String value) {
        String qname;
        String nsUri;
        if(prefix==-1) {
            nsUri = "";
            qname = localName;
        } else {
            nsUri = nsContext.getNamespaceURI(prefix);
            String p = nsContext.getPrefix(prefix);
            if(p.length()==0)
                // this is more likely a bug in the application code (NamespacePrefixMapper implementation)
                // this only happens when it tries to assign "" prefix to a non-"" URI,
                // which is by itself violation of namespace rec. But let's just be safe.
                // See http://forums.java.net/jive/thread.jspa?messageID=212598#212598
                qname = localName;
            else
                qname = p +':'+localName;
        }
        atts.addAttribute( nsUri, localName, qname, "CDATA", value );
    }

    public void endStartTag() throws SAXException {
        NamespaceContextImpl.Element ns = nsContext.getCurrent();
        if(ns!=null) {
            int sz = ns.count();
            for( int i=0; i=0; i-- ) {
                String p = ns.getPrefix(i);
                String uri = ns.getNsUri(i);
                if(uri.length()==0 && ns.getBase()==1)
                    continue;   // no point in definint xmlns='' on the root
                out.endPrefixMapping(p);
            }
        }
    }

    private String getQName(int prefix, String localName) {
        String qname;
        String p = nsContext.getPrefix(prefix);
        if(p.length()==0)
            qname = localName;
        else
            qname = p+':'+localName;
        return qname;
    }

    public void text(String value, boolean needsSP) throws IOException, SAXException, XMLStreamException {
        int vlen = value.length();
        if(buf.length<=vlen) {
            buf = new char[Math.max(buf.length*2,vlen+1)];
        }
        if(needsSP) {
            value.getChars(0,vlen,buf,1);
            buf[0] = ' ';
        } else {
            value.getChars(0,vlen,buf,0);
        }
        out.characters(buf,0,vlen+(needsSP?1:0));
    }

    public void text(Pcdata value, boolean needsSP) throws IOException, SAXException, XMLStreamException {
        int vlen = value.length();
        if(buf.length<=vlen) {
            buf = new char[Math.max(buf.length*2,vlen+1)];
        }
        if(needsSP) {
            value.writeTo(buf,1);
            buf[0] = ' ';
        } else {
            value.writeTo(buf,0);
        }
        out.characters(buf,0,vlen+(needsSP?1:0));
    }
}




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