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/*
 * $Id: MutableAttributesImpl.java,v 1.2 2004/10/06 07:15:08 obecker Exp $
 * 
 * The contents of this file are subject to the Mozilla Public License 
 * Version 1.1 (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.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the 
 * License.
 *
 * The Original Code is: this file
 *
 * The Initial Developer of the Original Code is Thomas Behrends.
 *
 * Portions created by  ______________________ 
 * are Copyright (C) ______ _______________________. 
 * All Rights Reserved.
 *
 * Contributor(s): Oliver Becker.
 */
package net.sf.joost.stx.helpers;

import org.xml.sax.Attributes;

/**
 * Mutable attributes implementation.
 */
public final class MutableAttributesImpl implements MutableAttributes
{
   private int _length;
   private int _max;
   private String[] _uris;
   private String[] _lNames;
   private String[] _qNames;
   private String[] _values;
   private String[] _types;

   public MutableAttributesImpl(Attributes attributes)
   {
      this(attributes, attributes.getLength());
   }

   public MutableAttributesImpl(Attributes attributes, int length)
   {
      _length = length;
      _max = _length+2; // _max is initially at least 2
      _uris = new String[_max];
      _lNames = new String[_max];
      _qNames = new String[_max];
      _values = new String[_max];
      _types = new String[_max];

      for (int n=_length; n-->0; ) {
         _uris[n] = attributes.getURI(n);
         _lNames[n] = attributes.getLocalName(n);
         _qNames[n] = attributes.getQName(n);
         _values[n] = attributes.getValue(n);
         _types[n] = attributes.getType(n);
      }
   }

   public int getIndex(String uri, String localName) 
   {
      for (int n=_length; n-->0; ) {
         if (localName.equals(_lNames[n]) && uri.equals(_uris[n])) 
            return n;
      }
      return -1;
   }
   
   public int getLength() 
   {
      return _length;
   }
   
   public String getLocalName(int index) 
   {
      return _lNames[index];
   }
	
   public String getQName(int index) 
   {
      return _qNames[index];
   }
	
   public String getType(int index) 
   {
      return _types[index];
   }
	
   public String getType(String qName) 
   {
      for (int n=_length; n-->0; ) {
         if (qName.equals(_qNames[n]))
            return _types[n];
      }
      return null;
   }
	
   public String getType(String uri, String localName) 
   {
      for (int n=_length; n-->0; ) {
         if (localName.equals(_lNames[n]) && _uris[n].equals(uri))
            return _types[n];
      }
      return null;
   }

   public String getURI(int index) 
   {
      return _uris[index];
   }

   public String getValue(int index) 
   {
      return _values[index];
   }

   public String getValue(String qName) 
   {
      for (int n=_length; n-->0; ) {
         if (qName.equals(_qNames[n]))
            return _values[n];
      }
      return null;
   }

   public String getValue(String uri, String localName) 
   {
      for (int n=_length; n-->0; ) {
         if(_lNames[n].equals(localName) && _uris[n].equals(uri))
            return _values[n];
      }
      return null;
   }

   public int getIndex(String qName) 
   {
      for(int n=_length; n-->0; ) {
         if (qName.equals(_qNames[n]))
            return n;
      }
      return -1;
   }
	
   public void setValue(int index, String value)
   {
      _values[index] = value;
   }

   public void addAttribute(String uri, String lName, String qName, 
                            String type, String value)
   {
      if (_length == _max) {
         _max <<= 1; // * 2

         String[] uris = new String[_max + 1];
         String[] lNames = new String[_max + 1];
         String[] qNames = new String[_max + 1];
         String[] values = new String[_max + 1];
         String[] types = new String[_max + 1];

         System.arraycopy(_uris, 0, uris, 0, _length);
         System.arraycopy(_lNames, 0, lNames, 0, _length);
         System.arraycopy(_qNames, 0, qNames, 0, _length);
         System.arraycopy(_values, 0, values, 0, _length);
         System.arraycopy(_types, 0, types, 0, _length);

         _uris = uris;
         _lNames = lNames;
         _qNames = qNames;
         _values = values;
         _types = types;
      }

      _uris[_length] = uri;
      _lNames[_length] = lName;
      _qNames[_length] = qName;
      _values[_length] = value;
      _types[_length] = type;
    	
      _length++;
   }
}