/*
 * Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
 *
 * This file is part of Resin(R) Open Source
 *
 * Each copy or derived work must preserve the copyright notice and this
 * notice unmodified.
 *
 * Resin Open Source is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * Resin Open Source is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
 * of NON-INFRINGEMENT.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Resin Open Source; if not, write to the
 *
 *   Free Software Foundation, Inc.
 *   59 Temple Place, Suite 330
 *   Boston, MA 02111-1307  USA
 *
 * @author Scott Ferguson
 */

package com.caucho.relaxng.pattern;

import com.caucho.relaxng.RelaxException;
import com.caucho.relaxng.program.NameClassItem;
import com.caucho.relaxng.program.NsNameItem;

/**
 * Relax name pattern
 */
public class NsNamePattern extends NameClassPattern {
  private String _name;
  private String _ns;

  private NameClassPattern _except;

  private NsNameItem _item;
  
  /**
   * Creates a new element pattern.
   */
  public NsNamePattern()
  {
  }

  /**
   * Creates a new element pattern.
   */
  public NsNamePattern(String ns)
  {
    _ns = ns;
  }

  /**
   * Creates a new element pattern.
   */
  public NsNamePattern(String name, String ns)
  {
    _name = name;
    _ns = ns;
  }

  public void setNamespace(String ns)
  {
    _ns = ns;
  }

  /**
   * Returns the Relax schema name.
   */
  public String getTagName()
  {
    return "nsName";
  }

  /**
   * Sets the except name pattern.
   */
  public void setExcept(NameClassPattern pattern)
  {
    _except = pattern;
  }

  /**
   * Creates the program.
   */
  public NameClassItem createNameItem()
    throws RelaxException
  {
    if (_item == null) {
      NsNameItem item = new NsNameItem(_ns);

      if (_except != null)
        item.setExcept(_except.createNameItem());

      _item = item;
    }
    
    return _item;
  }

  /**
   * Returns a string for the production.
   */
  public String toProduction()
  {
    if (_except == null)
      return _ns + ":*";
    else
      return "(" + _ns + ":* - " + _except + ")";
  }

  public boolean equals(Object o)
  {
    if (this == o)
      return true;

    if (! (o instanceof NsNamePattern))
      return false;

    NsNamePattern pattern = (NsNamePattern) o;

    if (! _ns.equals(pattern._ns))
      return false;

    if (_except == null)
      return pattern._except == null;
    else
      return _except.equals(pattern._except);
  }

  /**
   * Debugging.
   */
  public String toString()
  {
    return "NsName[" + _ns + "]";
  }
}