/*

 * 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

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

/*

 * Copyright (C) 2004-2011

 *

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and associated documentation files (the "Software"), to deal

 * in the Software without restriction, including without limitation the rights

 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

 * copies of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

 * THE SOFTWARE.

 */

package com.sun.xml.internal.rngom.digested;

import org.w3c.dom.Attr;

import org.w3c.dom.CDATASection;

import org.w3c.dom.Comment;

import org.w3c.dom.Document;

import org.w3c.dom.DocumentFragment;

import org.w3c.dom.Element;

import org.w3c.dom.EntityReference;

import org.w3c.dom.NamedNodeMap;

import org.w3c.dom.Node;

import org.w3c.dom.NodeList;

import org.w3c.dom.ProcessingInstruction;

import org.w3c.dom.Text;

import javax.xml.stream.XMLStreamException;

import javax.xml.stream.XMLStreamWriter;

/**

 * Printer of DOM to XML using StAX {@link XMLStreamWriter}.

 *

 * @author <A href="mailto:demakov@ispras.ru">Alexey Demakov</A>

 */

class DOMPrinter {

    protected XMLStreamWriter out;

    public DOMPrinter(XMLStreamWriter out) {

        this.out = out;

    }

    public void print(Node node) throws XMLStreamException {

        switch (node.getNodeType()) {

        case Node.DOCUMENT_NODE:

            visitDocument((Document) node);

            break;

        case Node.DOCUMENT_FRAGMENT_NODE:

            visitDocumentFragment((DocumentFragment) node);

            break;

        case Node.ELEMENT_NODE:

            visitElement((Element) node);

            break;

        case Node.TEXT_NODE:

            visitText((Text) node);

            break;

        case Node.CDATA_SECTION_NODE:

            visitCDATASection((CDATASection) node);

            break;

        case Node.PROCESSING_INSTRUCTION_NODE:

            visitProcessingInstruction((ProcessingInstruction) node);

            break;

        case Node.ENTITY_REFERENCE_NODE:

            visitReference((EntityReference) node);

            break;

        case Node.COMMENT_NODE:

            visitComment((Comment) node);

            break;

        case Node.DOCUMENT_TYPE_NODE:

            break;

        case Node.ATTRIBUTE_NODE:

        case Node.ENTITY_NODE:

        default:

            throw new XMLStreamException("Unexpected DOM Node Type "

                + node.getNodeType()

            );

        }

    }

    protected void visitChildren(Node node)

        throws XMLStreamException {

        NodeList nodeList = node.getChildNodes();

        if (nodeList != null) {

            for (int i = 0; i < nodeList.getLength(); i++) {

                print(nodeList.item(i));

            }

        }

    }

    protected void visitDocument(Document document)

        throws XMLStreamException {

        out.writeStartDocument();

        print(document.getDocumentElement());

        out.writeEndDocument();

    }

    protected void visitDocumentFragment(DocumentFragment documentFragment)

        throws XMLStreamException {

        visitChildren(documentFragment);

    }

    protected void visitElement(Element node)

        throws XMLStreamException {

        out.writeStartElement(node.getPrefix()

            , node.getLocalName()

            , node.getNamespaceURI()

        );

        NamedNodeMap attrs = node.getAttributes();

        for (int i = 0; i < attrs.getLength(); i++) {

            visitAttr((Attr) attrs.item(i));

        }

        visitChildren(node);

        out.writeEndElement();

    }

    protected void visitAttr(Attr node)

        throws XMLStreamException {

        String name = node.getLocalName();

        if (name.equals("xmlns")) {

            out.writeDefaultNamespace(node.getNamespaceURI());

        } else {

            String prefix = node.getPrefix();

            if (prefix != null && prefix.equals("xmlns")) {

                out.writeNamespace(prefix, node.getNamespaceURI());

            } else if (prefix != null) {

                out.writeAttribute(prefix

                    , node.getNamespaceURI()

                    , name

                    , node.getNodeValue()

                );

            } else {

                out.writeAttribute(node.getNamespaceURI()

                        , name

                        , node.getNodeValue());

            }

        }

    }

    protected void visitComment(Comment comment) throws XMLStreamException {

        out.writeComment(comment.getData());

    }

    protected void visitText(Text node) throws XMLStreamException {

        out.writeCharacters(node.getNodeValue());

    }

    protected void visitCDATASection(CDATASection cdata) throws XMLStreamException {

        out.writeCData(cdata.getNodeValue());

    }

    protected void visitProcessingInstruction(ProcessingInstruction processingInstruction)

        throws XMLStreamException {

        out.writeProcessingInstruction(processingInstruction.getNodeName()

            , processingInstruction.getData()

        );

    }

    protected void visitReference(EntityReference entityReference)

        throws XMLStreamException {

        visitChildren(entityReference);

    }

}