pms-webclient/Hash.js at master · PMS-Project/pms-webclient · GitHub

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/* ************************************************************************

License: MIT

Authors: Lukas Michalski, Benjamin Zeller, Thorsten Schwalb

************************************************************************ */

qx.Class.define("pms.Hash",
{
  extend : qx.core.Object,

/******************************************************************************
* CONSTRUCTOR
******************************************************************************/
  construct : function()
  {
    this.base(arguments);

    // Create an array to keep the keys for quick access or sorting
    this.__keys = [ ];

    // The place to keep the values, per key
    this.__values = { };

    // Create a variable, which has the length of the array
    this.__length = 0;
  },

  members :
  {

/******************************************************************************
* FUNCTION: put
******************************************************************************/
      put : function(key, value)
    {
      // Does this key already exist?
      if (this.__values[key] === undefined)
      {
        // Nope. Add its key to the key list
        this.__keys.push(key);

        // Increase length
        this.__length++;
      }

      // Save the value
      this.__values[key] = value;
    },

/******************************************************************************
* FUNCTION: get
******************************************************************************/
      get : function(key)
    {
      // Return the value corresponding to the given key
      return this.__values[key];
    },

/******************************************************************************
* FUNCTION: remove
******************************************************************************/
      remove : function(key)
    {
      // Does this key exist?
      if (this.__values[key])
      {
        // Remove the key from the keys array
        qx.lang.Array.remove(this.__keys, key);

        // Decrease length
        this.__length--;

        // Remove the member from the values map
        delete this.__values[key];
      }
    },

/******************************************************************************
* FUNCTION: getSortedKeys
******************************************************************************/
      getSortedKeys : function()
    {
      // Make a copy of the keys so the user doesn't screw with ours
      var keys = qx.lang.Array.clone(this.__keys);

      // Sort the keys
      keys.sort();

      // Give 'em what they came for!
      return keys;
    },

/******************************************************************************
* FUNCTION: getLength
******************************************************************************/
      getLength : function()
    {
      var length = this.__length;
      return length;
    }
  }
});