/**
 * Redistribution and use of this software and associated documentation ("Software"), with or
 * without modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain copyright statements and notices. Redistributions
 * must also contain a copy of this document.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of
 * conditions and the following disclaimer in the documentation and/or other materials provided with
 * the distribution.
 *
 * 3. The name "Exolab" must not be used to endorse or promote products derived from this Software
 * without prior written permission of Intalio, Inc. For written permission, please contact
 * info@exolab.org.
 *
 * 4. Products derived from this Software may not be called "Exolab" nor may "Exolab" appear in
 * their names without prior written permission of Intalio, Inc. Exolab is a registered trademark of
 * Intalio, Inc.
 *
 * 5. Due credit should be given to the Exolab Project (http://www.exolab.org/).
 *
 * THIS SOFTWARE IS PROVIDED BY INTALIO, INC. AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESSED OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL INTALIO, INC. OR ITS
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
 * WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Copyright 1999-2002 (C) Intalio, Inc. All Rights Reserved.
 *
 * $Id$
 */

package org.exolab.castor.xml.schema.reader;

import org.exolab.castor.xml.AttributeSet;
import org.exolab.castor.xml.Namespaces;
import org.exolab.castor.xml.XMLException;
import org.exolab.castor.xml.schema.Annotation;
import org.exolab.castor.xml.schema.AppInfo;
import org.exolab.castor.xml.schema.Documentation;
import org.exolab.castor.xml.schema.SchemaContext;
import org.exolab.castor.xml.schema.Schema;
import org.exolab.castor.xml.schema.SchemaNames;

/**
 * A class for Unmarshalling Annotations
 * 
 * @author <a href="mailto:kvisco@intalio.com">Keith Visco</a>
 * @version $Revision$ $Date: 2003-03-03 00:05:44 -0700 (Mon, 03 Mar 2003) $
 **/
public class AnnotationUnmarshaller extends ComponentReader {


  // --------------------/
  // - Member Variables -/
  // --------------------/

  /**
   * The current ComponentReader
   **/
  private ComponentReader unmarshaller;

  /**
   * The current branch depth
   **/
  private int depth = 0;

  /**
   * The Annotation we are constructing
   **/
  private Annotation _annotation = null;

  // ----------------/
  // - Constructors -/
  // ----------------/

  /**
   * Creates a new AnnotationUnmarshaller.
   * 
   * @param schemaContext the XMLContext to get some configuration settings from
   * @param atts the AttributeList
   **/
  public AnnotationUnmarshaller(final SchemaContext schemaContext, final AttributeSet atts)
      throws XMLException {
    super(schemaContext);

    _annotation = new Annotation();

    // check for invalid declared attributes
    if ((atts != null) && (atts.getSize() > 0)) {
      for (int i = 0; i < atts.getSize(); i++) {
        String namespace = atts.getNamespace(i);
        // according to the XML schema specification, it must be possible
        // to define any attributes with a non-schema namespace
        if (namespace.equals(Schema.DEFAULT_SCHEMA_NS)) {
          illegalAttribute(atts.getName(i));
        }
      }
    }

  } // -- AnnotationUnmarshaller

  // -----------/
  // - Methods -/
  // -----------/

  /**
   * Returns the name of the element that this ComponentReader handles
   * 
   * @return the name of the element that this ComponentReader handles
   **/
  public String elementName() {
    return SchemaNames.ANNOTATION;
  } // -- elementName

  /**
   * 
  **/
  public Annotation getAnnotation() {
    return _annotation;
  } // -- getAnnotation

  /**
   * Returns the Object created by this Unmarshaller
   * 
   * @return the object created by this Unmarshaller
   **/
  public Object getObject() {
    return getAnnotation();
  } // -- getObject

  /**
   * Signals the start of an element with the given name.
   *
   * @param name the NCName of the element. It is an error if the name is a QName (ie. contains a
   *        prefix).
   * @param namespace the namespace of the element. This may be null. Note: A null namespace is not
   *        the same as the default namespace unless the default namespace is also null.
   * @param atts the AttributeSet containing the attributes associated with the element.
   * @param nsDecls the namespace declarations being declared for this element. This may be null.
   **/
  public void startElement(String name, String namespace, AttributeSet atts, Namespaces nsDecls)
      throws XMLException {
    // -- Do delagation if necessary
    if (unmarshaller != null) {
      unmarshaller.startElement(name, namespace, atts, nsDecls);
      ++depth;
      return;
    }

    if (SchemaNames.APPINFO.equals(name)) {
      unmarshaller = new AppInfoUnmarshaller(getSchemaContext(), atts);
    } else if (SchemaNames.DOCUMENTATION.equals(name)) {
      unmarshaller = new DocumentationUnmarshaller(getSchemaContext(), atts);
    } else
      illegalElement(name);

  } // -- startElement

  /**
   * Signals to end of the element with the given name.
   *
   * @param name the NCName of the element. It is an error if the name is a QName (ie. contains a
   *        prefix).
   * @param namespace the namespace of the element.
   **/
  public void endElement(String name, String namespace) throws XMLException {

    // -- Do delagation if necessary
    if ((unmarshaller != null) && (depth > 0)) {
      unmarshaller.endElement(name, namespace);
      --depth;
      return;
    }

    // -- have unmarshaller perform any necessary clean up
    unmarshaller.finish();

    // -- appinfo
    if (SchemaNames.APPINFO.equals(name)) {
      _annotation.addAppInfo((AppInfo) unmarshaller.getObject());
    }
    // -- info
    else {
      _annotation.addDocumentation((Documentation) unmarshaller.getObject());
    }
    unmarshaller = null;
  } // -- endElement

  public void characters(char[] ch, int start, int length) throws XMLException {
    // -- Do delagation if necessary
    if (unmarshaller != null) {
      unmarshaller.characters(ch, start, length);
    }

  } // -- characters

} // -- ArchetypeUnmarshaller
