/*
 * The Apache Software License, Version 1.1
 *
 *
 * Copyright (c) 1999 The Apache Software Foundation.  All rights 
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 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 end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:  
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Xalan" and "Apache Software Foundation" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written 
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache",
 *    nor may "Apache" appear in their name, without prior written
 *    permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``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 THE APACHE SOFTWARE FOUNDATION 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.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation and was
 * originally based on software copyright (c) 1999, Lotus
 * Development Corporation., http://www.lotus.com.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */
package org.apache.xml.dtm;

/**
 * The responsibility of enclosing_type is to .
 * 
 * Created Jul 15, 2002
 * @author sboag
 */
class DTMSequenceEmpty implements DTMSequence
{
  /** @return the number of members in this sequence. */
  public int getLength()
  {
    return 0;
  }

  /** Retrieve the value for this member of the sequence. Since values may be
   * a heterogenous mix, and their type may not be known until they're examined,
   * they're returned as Objects. This is storage-inefficient if the value(s)
   * is/are builtins that map to Java primitives. Tough.
   * 
   * @param index 0-based index into the sequence.
   * @return the specified value
   * @throws exception if index <0 or >=length   
   * */
  public Object getValue(int index)
  {
    throw new java.lang.ArrayIndexOutOfBoundsException();
  }

  /** Retrieve the datatype namespace URI for this member of the sequence.
   * 
   * @param index 0-based index into the sequence.
   * @return the namespace for the specified value's type
   * @throws exception if index <0 or >=length   
   * */
  public String getTypeNS(int index)
  {
    throw new java.lang.ArrayIndexOutOfBoundsException();
  }

  /** Retrieve the datatype namespace URI for this member of the sequence.
   * 
   * %REVIEW% Do we really need type -- 
   * or can we just tell folks to do instanceOf on the Java value objects?  
   * 
   * @param index 0-based index into the sequence.
   * @return the localname of the specified value's type
   * @throws exception if index <0 or >=length   
   * */
  public String getTypeLocalName(int index)
  {
    throw new java.lang.ArrayIndexOutOfBoundsException();
  }

  /** Ask whether this member's datatype equals or is derived from a specified
   * schema NSURI/localname pair.
   * 
   * @param index 0-based index into the sequence.
   * @return true if the type is an instance of this schema datatype,
   * false if it isn't.
   * @throws exception if index <0 or >=length   
   * */
  public boolean isSchemaType(int index, String namespace, String localname)
  {
    throw new java.lang.ArrayIndexOutOfBoundsException();
  }

  /** %REVIEW% Format not yet firmly settled. Primarily for debugging purposes!
   * */
  public String toString()
  {
    return "EmptySequence[]";
  }
}