arraydataset.js

来自「在流览器上仿CS界面的JAVASCRIPT脚本」· JavaScript 代码 · 共 66 行

///////////////////////////////////////////////////////////////////////////////
// ArrayDataSet
//
// A basic implemention of a data set that takes a matrix (an array of arrays)
// and names the columns "0", "1" and so on

function ArrayDataSet( oArray, sName )
{
	BiDataSet.call( this, sName );

	var t = new BiDataTable;

	var rows = oArray.length;
	var cols = rows > 0 ? oArray[0].length : 0;

	if ( rows > 0 && cols > 0 )
	{
		var c;
		// create colums
		for ( var x = 0; x < cols; x++ )
		{
			c = new BiDataColumn( String(x) );
			// will map to "data", "string", "number" but will also include "undefined"
			c.setDataType( oArray[0][x] instanceof Date ? "date" : typeof oArray[0][x] );
			t.addColumn( c );
		}

		for ( var y = 0; y < rows; y++ )
			t.addRow( new ArrayDataRow( oArray[y] ) );
	}

	this.addTable( t );
}

_p = ArrayDataSet.prototype = new BiDataSet;
_p._className = "ArrayDataSet";


///////////////////////////////////////////////////////////////////////////////
// ArrayDataRow
//
// A very basic implementation of a BiDataRow that uses an array for the data
// and assumes the names of the columns are "0", "1", ...
//
// To use with ArrayDataSet but can be used with other data sets that follows
// this convention

function ArrayDataRow( oArray )
{
	BiDataRow.call( this );
	this._data = oArray;
}

_p = ArrayDataRow.prototype = new BiDataRow;
_p._className = "ArrayDataRow";

_p.getValueByIndex = function ( i )
{
	return this._data[ i ];
};

_p.getValueByName = function ( sName )
{
	return this._data[ Number( sName ) ];
};