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/*
* Filter classes for rrdFile
*
* Part of the javascriptRRD package
* Copyright (c) 2009 Frank Wuerthwein, fkw@ucsd.edu
*
* Original repository: http://javascriptrrd.sourceforge.net/
*
* MIT License [http://www.opensource.org/licenses/mit-license.php]
*
*/
/*
* All filter classes must implement the following interface:
* getMinStep()
* getLastUpdate()
* getNrRRAs()
* getRRAInfo(rra_idx)
* getFilterRRA(rra_idx)
* getName()
*
* Where getFilterRRA returns an object implementing the following interface:
* getIdx()
* getNrRows()
* getStep()
* getCFName()
* getEl(row_idx)
* getElFast(row_idx)
*
*/
// ================================================================
// Filter out a single DS (identified either by idx or by name)
function RRDRRAFilterDS(rrd_rra,ds_idx) {
this.rrd_rra=rrd_rra;
this.ds_idx=ds_idx;
}
RRDRRAFilterDS.prototype.getIdx = function() {return this.rrd_rra.getIdx();}
RRDRRAFilterDS.prototype.getNrRows = function() {return this.rrd_rra.getNrRows();}
RRDRRAFilterDS.prototype.getStep = function() {return this.rrd_rra.getStep();}
RRDRRAFilterDS.prototype.getCFName = function() {return this.rrd_rra.getCFName();}
RRDRRAFilterDS.prototype.getEl = function(row_idx) {return this.rrd_rra.getEl(row_idx,this.ds_idx);}
RRDRRAFilterDS.prototype.getElFast = function(row_idx) {return this.rrd_rra.getElFast(row_idx,this.ds_idx);}
function RRDFilterDS(rrd_file,ds_id) {
this.rrd_file=rrd_file;
this.ds_info=rrd_file.getDS(ds_id);
this.ds_idx=this.ds_info.getIdx();
}
RRDFilterDS.prototype.getName = function() {return this.ds_info.getName();}
RRDFilterDS.prototype.getMinSteps = function() {return this.rrd_file.getMinSteps();}
RRDFilterDS.prototype.getLastUpdate = function() {return this.rrd_file.getLastUpdate();}
RRDFilterDS.prototype.getNrRRAs = function() {return this.rrd_file.getNrRRAs();}
RRDFilterDS.prototype.getRRAInfo = function(idx) {return this.rrd_file.getRRAInfo(idx);}
RRDFilterDS.prototype.getFilterRRA = function(idx) {return new RRDRRAFilterDS(this.rrd_file.getRRA(idx),this.ds_idx);}
// ================================================================
// Filter out by using a user provided filter object
// The object must implement the following interface
// getName() - Symbolic name give to this function
// getDSName() - list of DSs used in computing the result (names or indexes)
// computeResult(val_list) - val_list contains the values of the requested DSs (in the same order)
// Example class that implements the interface:
// function sumDS(ds1,ds2) {
// this.getName = function() {return ds1+"+"+ds2;}
// this.getDSNames = function() {return [ds1,ds2];}
// this.computeResult = function(val_list) {return val_list[0]+val_list[1];}
// }
function RRDRRAFilterOp(rrd_rra,op_obj,ds_idx_list) {
this.rrd_rra=rrd_rra;
this.op_obj=op_obj;
this.ds_idx_list=ds_idx_list;
}
RRDRRAFilterOp.prototype.getIdx = function() {return this.rrd_rra.getIdx();}
RRDRRAFilterOp.prototype.getNrRows = function() {return this.rrd_rra.getNrRows();}
RRDRRAFilterOp.prototype.getStep = function() {return this.rrd_rra.getStep();}
RRDRRAFilterOp.prototype.getCFName = function() {return this.rrd_rra.getCFName();}
RRDRRAFilterOp.prototype.getEl = function(row_idx) {
var val_list=[];
for (var i=0; i<this.ds_idx_list.length; i++) {
val_list.push(this.rrd_rra.getEl(row_idx,this.ds_idx_list[i]));
}
return this.op_obj.computeResult(val_list);
}
RRDRRAFilterOp.prototype.getElFast = function(row_idx) {
var val_list=[];
for (var i=0; i<this.ds_idx_list.length; i++) {
val_list.push(this.rrd_rra.getElFast(row_idx,this.ds_idx_list[i]));
}
return this.op_obj.computeResult(val_list);
}
function RRDFilterOp(rrd_file,op_obj) {
this.rrd_file=rrd_file;
this.op_obj=op_obj;
var ds_names=op_obj.getDSNames();
var ds_idx_list=[];
for (var i=0; i<ds_names.length; i++) {
ds_idx_list.push(rrd_file.getDS(ds_names[i]).getIdx());
}
this.ds_idx_list=ds_idx_list;
}
RRDFilterOp.prototype.getName = function() {return this.op_obj.getName();}
RRDFilterOp.prototype.getMinSteps = function() {return this.rrd_file.getMinSteps();}
RRDFilterOp.prototype.getLastUpdate = function() {return this.rrd_file.getLastUpdate();}
RRDFilterOp.prototype.getNrRRAs = function() {return this.rrd_file.getNrRRAs();}
RRDFilterOp.prototype.getRRAInfo = function(idx) {return this.rrd_file.getRRAInfo(idx);}
RRDFilterOp.prototype.getFilterRRA = function(idx) {return new RRDRRAFilterOp(this.rrd_file.getRRA(idx),this.op_obj,this.ds_idx_list);}
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