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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you 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 javax.xml.soap;

import javax.xml.transform.Source;
import java.util.Iterator;

/**
 * The container for the SOAP-specific portion of a  SOAPMessage object. All
 * messages are required to have a SOAP part, so when a SOAPMessage object is created,
 * it will automatically have a SOAPPart object.
 * 
 * 
A SOAPPart object is a MIME part and has the MIME headers Content-Id,
 * Content-Location, and Content-Type. Because the value of Content-Type must be "text/xml", a
 *  SOAPPart object automatically has a MIME header of Content-Type with its value set
 * to "text/xml". The value must be "text/xml" because content in the SOAP part of a message must be
 * in XML format. Content that is not of type "text/xml" must be in an AttachmentPart
 * object rather than in the SOAPPart object.
 * 
 * 
When a message is sent, its SOAP part must have the MIME header Content-Type set to
 * "text/xml". Or, from the other perspective, the SOAP part of any message that is received must
 * have the MIME header Content-Type with a value of "text/xml".
 * 
 * 
A client can access the SOAPPart object of a SOAPMessage object by
 * calling the method  SOAPMessage.getSOAPPart. The following line of code, in which
 * message is a SOAPMessage object, retrieves the SOAP part of a
 * message.
  SOAPPart soapPart = message.getSOAPPart(); 
 * 
 * 
A SOAPPart object contains a  SOAPEnvelope object, which in turn
 * contains a  SOAPBody object and a SOAPHeader object. The
 * SOAPPart method getEnvelope can be used to retrieve the
 * SOAPEnvelope object.
 */
public abstract class SOAPPart implements javax.xml.soap.Node, org.w3c.dom.Document {

    public SOAPPart() {
    }

    /**
     * Gets the SOAPEnvelope object associated with this SOAPPart object.
     * Once the SOAP envelope is obtained, it can be used to get its contents.
     *
     * @return the SOAPEnvelope object for this  SOAPPart object
     * @throws SOAPException if there is a SOAP error
     */
    public abstract SOAPEnvelope getEnvelope() throws SOAPException;

    /**
     * Retrieves the value of the MIME header whose name is "Content-Id".
     *
     * @return a String giving the value of the MIME header named "Content-Id"
     * @see #setContentId(String) setContentId(java.lang.String)
     */
    public String getContentId() {

        String as[] = getMimeHeader("Content-Id");

        if (as != null && as.length > 0) {
            return as[0];
        } else {
            return null;
        }
    }

    /**
     * Retrieves the value of the MIME header whose name is "Content-Location".
     *
     * @return a String giving the value of the MIME header whose name is
     *         "Content-Location"
     * @see #setContentLocation(String) setContentLocation(java.lang.String)
     */
    public String getContentLocation() {

        String as[] = getMimeHeader("Content-Location");

        if (as != null && as.length > 0) {
            return as[0];
        } else {
            return null;
        }
    }

    /**
     * Sets the value of the MIME header named "Content-Id" to the given String.
     *
     * @param contentId a String giving the value of the MIME header "Content-Id"
     * @throws IllegalArgumentException
     *          if there is a problem in setting the content id
     * @see #getContentId() getContentId()
     */
    public void setContentId(String contentId) {
        setMimeHeader("Content-Id", contentId);
    }

    /**
     * Sets the value of the MIME header "Content-Location" to the given String.
     *
     * @param contentLocation a String giving the value of the MIME header
     *                        "Content-Location"
     * @throws IllegalArgumentException
     *          if there is a problem in setting the content location.
     * @see #getContentLocation() getContentLocation()
     */
    public void setContentLocation(String contentLocation) {
        setMimeHeader("Content-Location", contentLocation);
    }

    /**
     * Removes all MIME headers that match the given name.
     *
     * @param header a String giving the name of the MIME header(s) to be removed
     */
    public abstract void removeMimeHeader(String header);

    /** Removes all the MimeHeader objects for this SOAPEnvelope object. */
    public abstract void removeAllMimeHeaders();

    /**
     * Gets all the values of the MimeHeader object in this SOAPPart
     * object that is identified by the given String.
     *
     * @param name the name of the header; example: "Content-Type"
     * @return a String array giving all the values for the specified header
     * @see #setMimeHeader(String, String) setMimeHeader(java.lang.String,
     *      java.lang.String)
     */
    public abstract String[] getMimeHeader(String name);

    /**
     * Changes the first header entry that matches the given header name so that its value is the
     * given value, adding a new header with the given name and value if no existing header is a
     * match. If there is a match, this method clears all existing values for the first header that
     * matches and sets the given value instead. If more than one header has the given name, this
     * method removes all of the matching headers after the first one.
     * 
     * 
Note that RFC822 headers can contain only US-ASCII characters.
     *
     * @param name  a String giving the header name for which to search
     * @param value a String giving the value to be set. This value will be substituted
     *              for the current value(s) of the first header that is a match if there is one. If
     *              there is no match, this value will be the value for a new
     *              MimeHeader object.
     * @throws IllegalArgumentException
     *          if there was a problem with the specified mime header name or value
     * @throws IllegalArgumentException
     *          if there was a problem with the specified mime header name or value
     * @see #getMimeHeader(String) getMimeHeader(java.lang.String)
     */
    public abstract void setMimeHeader(String name, String value);

    /**
     * Creates a MimeHeader object with the specified name and value and adds it to
     * this SOAPPart object. If a MimeHeader with the specified name
     * already exists, this method adds the specified value to the already existing value(s).
     * 
     * 
Note that RFC822 headers can contain only US-ASCII characters.
     *
     * @param name  a String giving the header name
     * @param value a String giving the value to be set or added
     * @throws IllegalArgumentException
     *          if there was a problem with the specified mime header name or value
     */
    public abstract void addMimeHeader(String name, String value);

    /**
     * Retrieves all the headers for this SOAPPart object as an iterator over the
     * MimeHeader objects.
     *
     * @return an Iterator object with all of the Mime headers for this
     *         SOAPPart object
     */
    public abstract Iterator getAllMimeHeaders();

    /**
     * Retrieves all MimeHeader objects that match a name in the given array.
     *
     * @param names a String array with the name(s) of the MIME headers to be returned
     * @return all of the MIME headers that match one of the names in the given array, returned as
     *         an Iterator object
     */
    public abstract Iterator getMatchingMimeHeaders(String names[]);

    /**
     * Retrieves all MimeHeader objects whose name does not match a name in the given
     * array.
     *
     * @param names a String array with the name(s) of the MIME headers not to be
     *              returned
     * @return all of the MIME headers in this SOAPPart object except those that match
     *         one of the names in the given array. The nonmatching MIME headers are returned as an
     *         Iterator object.
     */
    public abstract Iterator getNonMatchingMimeHeaders(String names[]);

    /**
     * Sets the content of the SOAPEnvelope object with the data from the given
     * Source object.
     *
     * @param source javax.xml.transform.Source object with the data to be set
     * @throws SOAPException if there is a problem in setting the source
     * @see #getContent() getContent()
     */
    public abstract void setContent(Source source) throws SOAPException;

    /**
     * Returns the content of the SOAPEnvelope as a JAXP  Source object.
     *
     * @return the content as a  javax.xml.transform.Source object
     * @throws SOAPException if the implementation cannot convert the specified Source
     *                       object
     * @see #setContent(javax.xml.transform.Source) setContent(javax.xml.transform.Source)
     */
    public abstract Source getContent() throws SOAPException;
}