/*
 * Copyright 2004,2005 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.axiom.soap.impl.dom;

import org.apache.axiom.om.OMConstants;
import org.apache.axiom.om.OMElement;
import org.apache.axiom.om.OMException;
import org.apache.axiom.om.OMNamespace;
import org.apache.axiom.om.OMNode;
import org.apache.axiom.om.OMXMLParserWrapper;
import org.apache.axiom.om.impl.MTOMXMLStreamWriter;
import org.apache.axiom.om.impl.dom.DocumentImpl;
import org.apache.axiom.soap.SOAP12Constants;
import org.apache.axiom.soap.SOAPBody;
import org.apache.axiom.soap.SOAPConstants;
import org.apache.axiom.soap.SOAPEnvelope;
import org.apache.axiom.soap.SOAPFactory;
import org.apache.axiom.soap.SOAPHeader;
import org.apache.axiom.soap.SOAPProcessingException;
import org.apache.axiom.soap.impl.dom.factory.DOMSOAPFactory;

import javax.xml.namespace.QName;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamWriter;

public class SOAPEnvelopeImpl extends SOAPElement implements SOAPEnvelope,
        OMConstants {


    /**
     * @param builder
     */
    public SOAPEnvelopeImpl(OMXMLParserWrapper builder, SOAPFactory factory) {
        super(null, SOAPConstants.SOAPENVELOPE_LOCAL_NAME, builder, factory);
    }

    public SOAPEnvelopeImpl(DocumentImpl doc, OMXMLParserWrapper builder, SOAPFactory factory) {
        super(
                doc,
                SOAPConstants.SOAPENVELOPE_LOCAL_NAME,
                null,
                builder, factory);
    }
    /**
     * @param ns
     */
    public SOAPEnvelopeImpl(OMNamespace ns, SOAPFactory factory) {
        super(((DOMSOAPFactory) factory).getDocument(),
                SOAPConstants.SOAPENVELOPE_LOCAL_NAME, ns, factory);
        this.getOwnerDocument().appendChild(this);
    }

    /**
     * Returns the <CODE>SOAPHeader</CODE> object for this <CODE> SOAPEnvelope</CODE>
     * object.
     * <P>
     * This SOAPHeader will just be a container for all the headers in the
     * <CODE>OMMessage</CODE>
     * </P>
     *
     * @return the <CODE>SOAPHeader</CODE> object or <CODE> null</CODE> if
     *         there is none
     * @throws org.apache.axiom.om.OMException
     *             if there is a problem obtaining the <CODE>SOAPHeader</CODE>
     *             object
     * @throws OMException
     */
    public SOAPHeader getHeader() throws OMException {
        SOAPHeader header =
                (SOAPHeader) getFirstChildWithName(new QName(SOAPConstants.HEADER_LOCAL_NAME));
        return header;
    }

    public void addChild(OMNode child) {
        if ((child instanceof OMElement)
                && !(child instanceof SOAPHeader || child instanceof SOAPBody)) {
            throw new SOAPProcessingException(
                    "SOAP Envelope can not have children other than SOAP Header and Body",
                    SOAP12Constants.FAULT_CODE_SENDER);
        } else {
            super.addChild(child);
        }
    }

    /**
     * Returns the <CODE>SOAPBody</CODE> object associated with this <CODE>SOAPEnvelope</CODE>
     * object.
     * <P>
     * This SOAPBody will just be a container for all the BodyElements in the
     * <CODE>OMMessage</CODE>
     * </P>
     *
     * @return the <CODE>SOAPBody</CODE> object for this <CODE> SOAPEnvelope</CODE>
     *         object or <CODE>null</CODE> if there is none
     * @throws org.apache.axiom.om.OMException
     *             if there is a problem obtaining the <CODE>SOAPBody</CODE>
     *             object
     * @throws OMException
     */
    public SOAPBody getBody() throws OMException {
        // check for the first element
        OMElement element = getFirstElement();
        if (element != null) {
            if (SOAPConstants.BODY_LOCAL_NAME.equals(element.getLocalName())) {
                return (SOAPBody) element;
            } else { // if not second element SHOULD be the body
                OMNode node = element.getNextOMSibling();
                while (node != null && node.getType() != OMNode.ELEMENT_NODE) {
                    node = node.getNextOMSibling();
                }
                element = (OMElement) node;

                if (node != null
                        && SOAPConstants.BODY_LOCAL_NAME.equals(element
                                .getLocalName())) {
                    return (SOAPBody) element;
                }
              /*  else {
					throw new OMException(
							"SOAPEnvelope must contain a body element which is either first or second child element of the SOAPEnvelope.");
				}*/
            }
        }
        return null;
    }

    /**
     * Method detach
     *
     * @throws OMException
     */
    public OMNode detach() throws OMException {
        throw new OMException("Root Element can not be detached");
    }

    protected void checkParent(OMElement parent) throws SOAPProcessingException {
        // here do nothing as SOAPEnvelope doesn't have a parent !!!
    }

    protected void internalSerialize(XMLStreamWriter writer2, boolean cache)
            throws XMLStreamException {

        MTOMXMLStreamWriter writer = (MTOMXMLStreamWriter) writer2;
        if (!writer.isIgnoreXMLDeclaration()) {
            String charSetEncoding = writer.getCharSetEncoding();
            String xmlVersion = writer.getXmlVersion();
            writer
                    .getXmlStreamWriter()
                    .writeStartDocument(
                            charSetEncoding == null ? OMConstants.DEFAULT_CHAR_SET_ENCODING
                                    : charSetEncoding,
                            xmlVersion == null ? OMConstants.DEFAULT_XML_VERSION
                                    : xmlVersion);
        }
        super.internalSerialize(writer, cache);
    }

    public OMNode getNextOMSibling() throws OMException {
        if(this.ownerNode != null && !this.ownerNode.isComplete()) {
            this.ownerNode.setComplete(true);
        }
        return null;
    }
    
}