/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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package com.sun.xml.internal.bind.v2.runtime.output;

import java.io.IOException;

import javax.xml.stream.XMLEventFactory;

import javax.xml.stream.XMLEventWriter;

import javax.xml.stream.XMLStreamException;

import javax.xml.stream.events.Attribute;

import javax.xml.stream.events.Characters;

import com.sun.xml.internal.bind.v2.runtime.XMLSerializer;

import org.xml.sax.SAXException;

/**

 * {@link XmlOutput} that writes to StAX {@link XMLEventWriter}.

 *

 * @author Kohsuke Kawaguchi

 */

public class XMLEventWriterOutput extends XmlOutputAbstractImpl {

    private final XMLEventWriter out;

    private final XMLEventFactory ef;

    /** One whitespace. */

    private final Characters sp;

    public XMLEventWriterOutput(XMLEventWriter out) {

        this.out = out;

        ef = XMLEventFactory.newInstance();

        sp = ef.createCharacters(" ");

    }

    // not called if we are generating fragments

    @Override

    public void startDocument(XMLSerializer serializer, boolean fragment, int[] nsUriIndex2prefixIndex, NamespaceContextImpl nsContext) throws IOException, SAXException, XMLStreamException {

        super.startDocument(serializer, fragment,nsUriIndex2prefixIndex,nsContext);

        if(!fragment)

            out.add(ef.createStartDocument());

    }

    public void endDocument(boolean fragment) throws IOException, SAXException, XMLStreamException {

        if(!fragment) {

            out.add(ef.createEndDocument());

            out.flush();

        }

        super.endDocument(fragment);

    }

    public void beginStartTag(int prefix, String localName) throws IOException, XMLStreamException {

        out.add(

            ef.createStartElement(

                nsContext.getPrefix(prefix),

                nsContext.getNamespaceURI(prefix),

                localName));

        NamespaceContextImpl.Element nse = nsContext.getCurrent();

        if(nse.count()>0) {

            for( int i=nse.count()-1; i>=0; i-- ) {

                String uri = nse.getNsUri(i);

                if(uri.length()==0 && nse.getBase()==1)

                    continue;   // no point in definint xmlns='' on the root

                out.add(ef.createNamespace(nse.getPrefix(i),uri));

            }

        }

    }

    public void attribute(int prefix, String localName, String value) throws IOException, XMLStreamException {

        Attribute att;

        if(prefix==-1)

            att = ef.createAttribute(localName,value);

        else

            att = ef.createAttribute(

                    nsContext.getPrefix(prefix),

                    nsContext.getNamespaceURI(prefix),

                    localName, value);

        out.add(att);

    }

    public void endStartTag() throws IOException, SAXException {

        // noop

    }

    public void endTag(int prefix, String localName) throws IOException, SAXException, XMLStreamException {

        out.add(

            ef.createEndElement(

                nsContext.getPrefix(prefix),

                nsContext.getNamespaceURI(prefix),

                localName));

    }

    public void text(String value, boolean needsSeparatingWhitespace) throws IOException, SAXException, XMLStreamException {

        if(needsSeparatingWhitespace)

            out.add(sp);

        out.add(ef.createCharacters(value));

    }

    public void text(Pcdata value, boolean needsSeparatingWhitespace) throws IOException, SAXException, XMLStreamException {

        text(value.toString(),needsSeparatingWhitespace);

    }

}