OpenLayers.Filter.Comparison

This class represents a comparison filter.

Inherits from

OpenLayers.Filter

Summary

OpenLayers.Filter.Comparison	This class represents a comparison filter.
Properties
type	{String} type: type of the comparison.
property	{String} name of the context property to compare
value	{Number} or {String} comparison value for binary comparisons.
lowerBoundary	{Number} or {String} lower boundary for between comparisons.
upperBoundary	{Number} or {String} upper boundary for between comparisons.
Constructor
OpenLayers.Filter.Comparison	Creates a comparison rule.
Functions
evaluate	Evaluates this filter in a specific context.
value2regex	Converts the value of this rule into a regular expression string, according to the wildcard characters specified.
clone	Clones this filter.

Properties

type

{String} type: type of the comparison. This is one of

OpenLayers.Filter.Comparison.EQUAL_TO = “==”;
OpenLayers.Filter.Comparison.NOT_EQUAL_TO = “!=”;
OpenLayers.Filter.Comparison.LESS_THAN = “<”;
OpenLayers.Filter.Comparison.GREATER_THAN = “>”;
OpenLayers.Filter.Comparison.LESS_THAN_OR_EQUAL_TO = “<=”;
OpenLayers.Filter.Comparison.GREATER_THAN_OR_EQUAL_TO = “>=”;
OpenLayers.Filter.Comparison.BETWEEN = “..”;
OpenLayers.Filter.Comparison.LIKE = “~”;

property

{String} name of the context property to compare

value

{Number} or {String} comparison value for binary comparisons. In the case of a String, this can be a combination of text and propertyNames in the form “literal ${propertyName}”

lowerBoundary

{Number} or {String} lower boundary for between comparisons. In the case of a String, this can be a combination of text and propertyNames in the form “literal ${propertyName}”

upperBoundary

{Number} or {String} upper boundary for between comparisons. In the case of a String, this can be a combination of text and propertyNames in the form “literal ${propertyName}”

Constructor

OpenLayers.Filter.Comparison

Creates a comparison rule.

Parameters

options

{Object} An optional object with properties to set on the rule

Returns

{OpenLayers.Filter.Comparison}

Functions

evaluate

evaluate: function( context )

Evaluates this filter in a specific context. Should be implemented by subclasses.

Parameters

context

{Object} Context to use in evaluating the filter.

Returns

{Boolean} The filter applies.

value2regex

value2regex: function( wildCard,
singleChar,
escapeChar )

Converts the value of this rule into a regular expression string, according to the wildcard characters specified. This method has to be called after instantiation of this class, if the value is not a regular expression already.

Parameters

wildCard	{<Char>} wildcard character in the above value, default is “*”
singleChar	{<Char>) single-character wildcard in the above value default is “.”
escape	{<Char>) escape character in the above value, default is “!”

Returns

{String} regular expression string

clone

clone: function()

Clones this filter.

Returns

{OpenLayers.Filter.Comparison} Clone of this filter.