/*** -*- Mode: Javascript; tab-width: 2;
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 jslib code.
The Initial Developer of the Original Code is jslib team.

Portions created by jslib team are
Copyright (C) 2000 jslib team.  All
Rights Reserved.

Contributor(s): Rajeev J Sebastian <rajeev_jsv@yahoo.com)> (original author)

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

function Parameter(k, v)
{
    this.key = k;
    this.value = v;
}

Parameter.prototype = 
{
    key:null,
    value:null
}

//stores a set of keys and associated values
function Dictionary()
{
    this._array = new Array();
}

Dictionary.prototype =
{
    _array: null,
    _iterind: 0,
    length: null,

    //if key exists, will replace current value with value arg
    put: function(key,value)
    {
        if(key ==null || value == null) return this;

        var ind = -1;
        for(var i = 0; i < this._array.length; i++)
        if(this._array[i].key == key)
        {
            ind = i;
            break;
        }

        if(ind == -1)
        {
            var p = new Parameter(key,value);
            this._array.push(p);
        }
        else
        {
            this._array[ind].value = value;
        }
        this.length = this.size();
        return this;
    },

    get: function(key)
    {
        for(var i = 0; i < this._array.length; i++)
        if(this._array[i].key == key ) return this._array[i].value;
        return null;
    },

    getByIdx: function(idx)
    {
        if (idx < 0 || idx >= this._array.length)
        return null
        else
        return this._array[idx];
    },

    remove: function(key)
    {
        for(var i = 0; i < this._array.length; i++)
        if(this._array[i].key == key)
        {
            this._array.splice(i,1);
        }
        this.length = this.size();
    },

    keys: function()
    {
        var list = new Array();
        for(var i = 0; i < this._array.length; i++)
        list.push(this._array[i].key);
        return list;
    },

    //checks if dict has a key, and if it does, sets value to
    //the value in dict
    hasKey: function(key, value)
    {
        value = null;
        for(var i = 0; i < this._array.length; i++)
        if(this._array[i].key == key)
        {
            value = this._array[i].value;
            return true;
        }
        return false;
    },

    size: function()
    {
        return this._array.length;
    },

    //object related
    toString: function()
    {
        return "Array :" + this._array.length;
    },

    //iterator related
    //iterates over each Parameter
    resetIterator: function()
    {
        this._iterind = 0;
    },

    hasMoreElements: function()
    {
        if(this._iterind < this._array.length) return true;
        else return false;
    },

    next: function(key, value)
    {
        return this._array[this._iterind++];
    },

    isFirstIterator: function()
    {
        return this._iterind == 0;
    }
}