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define("dojo/data/util/filter", ["dojo/_base/lang"], function(lang) {
// module:
// dojo/data/util/filter
// summary:
// TODOC
var filter = lang.getObject("dojo.data.util.filter", true);
filter.patternToRegExp = function(/*String*/pattern, /*boolean?*/ ignoreCase){
// summary:
// Helper function to convert a simple pattern to a regular expression for matching.
// description:
// Returns a regular expression object that conforms to the defined conversion rules.
// For example:
// ca* -> /^ca.*$/
// *ca* -> /^.*ca.*$/
// *c\*a* -> /^.*c\*a.*$/
// *c\*a?* -> /^.*c\*a..*$/
// and so on.
//
// pattern: string
// A simple matching pattern to convert that follows basic rules:
// * Means match anything, so ca* means match anything starting with ca
// ? Means match single character. So, b?b will match to bob and bab, and so on.
// \ is an escape character. So for example, \* means do not treat * as a match, but literal character *.
// To use a \ as a character in the string, it must be escaped. So in the pattern it should be
// represented by \\ to be treated as an ordinary \ character instead of an escape.
//
// ignoreCase:
// An optional flag to indicate if the pattern matching should be treated as case-sensitive or not when comparing
// By default, it is assumed case sensitive.
var rxp = "^";
var c = null;
for(var i = 0; i < pattern.length; i++){
c = pattern.charAt(i);
switch(c){
case '\\':
rxp += c;
i++;
rxp += pattern.charAt(i);
break;
case '*':
rxp += ".*"; break;
case '?':
rxp += "."; break;
case '$':
case '^':
case '/':
case '+':
case '.':
case '|':
case '(':
case ')':
case '{':
case '}':
case '[':
case ']':
rxp += "\\"; //fallthrough
default:
rxp += c;
}
}
rxp += "$";
if(ignoreCase){
return new RegExp(rxp,"mi"); //RegExp
}else{
return new RegExp(rxp,"m"); //RegExp
}
};
return filter;
});
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