/*
 * Copyright 2001-2004 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 javax.xml.soap;

/**
 * <code>SOAPFactory</code> is a factory for creating various objects
 * that exist in the SOAP XML tree.
 *
 * <code>SOAPFactory</code> can be
 * used to create XML fragments that will eventually end up in the
 * SOAP part. These fragments can be inserted as children of the
 * <code>SOAPHeaderElement</code> or <code>SOAPBodyElement</code> or
 * <code>SOAPEnvelope</code>.
 *
 * <code>SOAPFactory</code> also has methods to create
 * <code>javax.xml.soap.Detail</code> objects as well as
 * <code>java.xml.soap.Name</code> objects.
 *
 */
public abstract class SOAPFactory {

    public SOAPFactory() {}

    /**
     * Create a <code>SOAPElement</code> object initialized with the
     * given <code>Name</code> object.
     *
     * @param name a <code>Name</code> object with the XML name for
     *        the new element
     * @return  the new <code>SOAPElement</code> object that was
     *    created
     * @throws SOAPException if there is an error in creating the
     *       <code>SOAPElement</code> object
     */
    public abstract SOAPElement createElement(Name name) throws SOAPException;

    /**
     * Create a <code>SOAPElement</code> object initialized with the
     * given local name.
     *
     * @param localName a <code>String</code> giving the local name for
     *       the new element
     * @return the new <code>SOAPElement</code> object that was
     *    created
     * @throws SOAPException if there is an error in creating the
     *       <code>SOAPElement</code> object
     */
    public abstract SOAPElement createElement(String localName) throws SOAPException;

    /**
     * Create a new <code>SOAPElement</code> object with the given
     * local name, prefix and uri.
     *
     * @param localName a <code>String</code> giving the local name
     *            for the new element
     * @param prefix the prefix for this <code>SOAPElement</code>
     * @param uri a <code>String</code> giving the URI of the
     *      namespace to which the new element belongs
     * @return the new <code>SOAPElement</code> object that was
     *    created
     * @throws SOAPException if there is an error in creating the
     *      <code>SOAPElement</code> object
     */
    public abstract SOAPElement createElement(String localName, String prefix, String uri)
        throws SOAPException;

    /**
     * Creates a new <code>Detail</code> object which serves as a container
     * for <code>DetailEntry</code> objects.
     * <p>
     * This factory method creates <code>Detail</code> objects for use in
     * situations where it is not practical to use the <code>SOAPFault</code>
     * abstraction.
     *
     * @return a <code>Detail</code> object
     * @throws SOAPException if there is a SOAP error
     */
    public abstract Detail createDetail() throws SOAPException;

    /**
     * Creates a new <code>Name</code> object initialized with the
     * given local name, namespace prefix, and namespace URI.
     * <p>
     * This factory method creates <code>Name</code> objects for use in
     * situations where it is not practical to use the <code>SOAPEnvelope</code>
     * abstraction.
     *
     * @param localName a <code>String</code> giving the local name
     * @param prefix a <code>String</code> giving the prefix of the namespace
     * @param uri a <code>String</code> giving the URI of the namespace
     * @return a <code>Name</code> object initialized with the given
     *   local name, namespace prefix, and namespace URI
     * @throws SOAPException if there is a SOAP error
     */
    public abstract Name createName(String localName, String prefix, String uri)
        throws SOAPException;

    /**
     * Creates a new <code>Name</code> object initialized with the
     * given local name.
     * <p>
     * This factory method creates <code>Name</code> objects for use in
     * situations where it is not practical to use the <code>SOAPEnvelope</code>
     * abstraction.
     *
     * @param localName a <code>String</code> giving the local name
     * @return a <code>Name</code> object initialized with the given
     *    local name
     * @throws SOAPException if there is a SOAP error
     */
    public abstract Name createName(String localName) throws SOAPException;

    /**
     * Creates a new instance of <code>SOAPFactory</code>.
     *
     * @return a new instance of a <code>SOAPFactory</code>
     * @throws SOAPException if there was an error creating the
     *       default <code>SOAPFactory</code>
     */
    public static SOAPFactory newInstance() throws SOAPException {

        try {
            return (SOAPFactory) FactoryFinder.find(SF_PROPERTY, DEFAULT_SF);
        } catch (Exception exception) {
            throw new SOAPException("Unable to create SOAP Factory: "
                                    + exception.getMessage());
        }
    }

    private static final String SF_PROPERTY = "javax.xml.soap.SOAPFactory";

    private static final String DEFAULT_SF =
        "org.apache.axis.soap.SOAPFactoryImpl";
}
