define(['mmirf/encodeUtils'],
/**
* Set to "backwards compatibility mode v3" (for pre version 4.0) for SemanticInterpreter (and GrammarConvert).
*
* Used by {@link mmir.Core.setToCompatibilityMode3Extension}.
*
* @class
* @name mmir.SemanticInterpreter.setToCompatibilityModeExtension
* @static
*
* @example
* mmir.require(['mmirf/semanticInterpreterCompatibility', 'mmirf/semanticInterpreter', 'mmirf/grammarConverter'], function(setCompatibility, semanticInterpreter, GrammarConverter){
* setCompatibility(semanticInterpreter, GrammarConverter);
* });
*
* @public
* @see mmir.Core.setToCompatibilityMode3Extension
*/
function(encodeUtils){
/**
* Set to "backwards compatibility mode" (for pre version 4.0).
*
* This function re-adds deprecated and removed functions and
* properties to SemanticInterpreter and GrammarConverter.
*
* NOTE that once set to compatibility mode, it cannot be reset to
* non-compatibility mode.
*
*
* @param {mmir.SemtanticInterpreter} semanticInterpreter
* the SemanticInterpreter instance
*
* @param {GrammarConverter} grammarConverter
* the GrammarConverter constructor
*
*
* @constructs mmir.SemanticInterpreter.setToCompatibilityModeExtension
*
*/
return setToCompatibilityMode = function(semanticInterpreter, grammarConverter) {
semanticInterpreter.getInstance = function(){return this;};
/**
* @memberOf mmir.SemanticInterpreter.setToCompatibilityModeExtension.SemanticInterpreter
*/
semanticInterpreter.getASRSemantic = semanticInterpreter.interpret;
/**
* @private
* @memberOf mmir.SemanticInterpreter.setToCompatibilityModeExtension.SemanticInterpreter
*/
var removeStopwordsAltFunc = function removeStopwords_alt(thePhrase, lang, gc){
if(!gc){
gc = semanticInterpreter.getGrammarConverter(lang);
}
var stop_words_regexp = gc.getStopWordsRegExpr_alt();
while (thePhrase.match(stop_words_regexp)) {
thePhrase = thePhrase.replace(stop_words_regexp, ' ');
thePhrase = thePhrase.trim();
}
return thePhrase;
};
//helper: pre-processing with legacy alternative stopword removal function
var preprocAlt = function preproc_alt(thePhrase, pos, maskFunc, stopwordFunc){
return removeStopwordsAltFunc(thePhrase, null, this);
};
//helper: post-processing with legacy alternative stopword removal function
var postprocAlt = function postproc_alt(procResult, recodeFunc){
return this.unmaskJSON(procResult);
};
/**
* WARNING: there must only be 1 active call at a time of either of <code>getASRSemantic_alt</code>
* and of <code>getASRSemantic</code>.
*
* NOTE: in difference to the original implementation, this backwards-compatibility version offers
* an optional 3rd parameter for a callback function, allowing asynchronous grammar execution.
* WARNING: A compiled grammar must already exist, i.e. this function does not support
* "auto-compilation", if the compiled version of the grammar does not exist yet
* (that will most likely result in an error).
* As a work-around, you can use first the non-alt version (<code>getASRSemantic(phrase, lanc, callback)</code>)
* for the same language and using a callback, and after the callback was invoked, use this alt-version
* for getting the ASR semantic result.
*/
semanticInterpreter.getASRSemantic_alt = function(phrase, langCode, callback){
var gc = this.getGrammarConverter(langCode);
var orig_preproc = gc.preproc;
var orig_postproc = gc.postproc;
gc.preproc = preprocAlt;
gc.postproc = postprocAlt;
var isSync = false;//helper for detecting, if getASRSemantic is executed asynchronously
var resultSync, resultAsync;
resultSync = this.getASRSemantic(phrase, langCode, function(res){
isSync = true;
resultAsync = res;
gc.preproc = orig_preproc;
gc.postproc = orig_postproc;
if(callback){
callback.apply(null, arguments);
}
});
if(isSync){//if synchronously executed, then isSync is true at this point (-> must not restore preproc, postproc if async exec)
gc.preproc = orig_preproc;
gc.postproc = orig_postproc;
}
return resultSync? resultSync : resultAsync;
};
/**
* @memberOf SemanticInterpreter.prototype
* @public
*/
semanticInterpreter.removeStopwords_alt = function(thePhrase, lang){
return this.removeStopwords(thePhrase, lang, removeStopwordsAltFunc);
};
/**
* alternative reg-exp for stop-words (a different method for detecting/removing stopwords must be used!)
* @memberOf mmir.SemanticInterpreter.setToCompatibilityModeExtension.GrammarConverter
*/
grammarConverter.prototype.stop_words_regexp_alt;
/**
* default setting for loading JSON files:
* if set to true, old-style umlauts encodings (e.g. __oe__) will converted after loading the file
* Enable this, if you need to use old-style encoded grammars ... still, the better option would
* be to convert the old-style grammar (i.e. use un-encoded umlauts in the JSON grammar file).
*
* @memberOf mmir.SemanticInterpreter.setToCompatibilityModeExtension.GrammarConverter
*/
grammarConverter.prototype.convertOldFormat = false;
/**
* original <code>loadGrammar</code> function
* @memberOf mmir.SemanticInterpreter.setToCompatibilityModeExtension.GrammarConverter
*/
grammarConverter.prototype.__loadGrammar = grammarConverter.prototype.loadGrammar;
/**
* restored "auto-upgrading" for loaded grammars
* (original <code>loadGrammar</code> function will be available as <code>__loadGrammar</code>)
*
* @memberOf mmir.SemanticInterpreter.setToCompatibilityModeExtension.GrammarConverter
*/
grammarConverter.prototype.loadGrammar = function(successCallback, errorCallback, grammarUrl, doLoadSynchronously){
var self = this;
var onsuccess = function(){
//if auto-upgrading is enabled:
// decode old-style umlaut masking before continuing
if(self.convertOldFormat){
self.recodeJSON(self. json_grammar_definition, self.decodeUmlauts);
}
if (typeof successCallback == "function") {
successCallback.apply(this, arguments);
}
};
return this.__loadGrammar(onsuccess, errorCallback, grammarUrl, doLoadSynchronously);
};
/**
* initialize alternative version / regular expression for stopwords
*
* @memberOf mmir.SemanticInterpreter.setToCompatibilityModeExtension.GrammarConverter
*/
grammarConverter.prototype.parseStopWords_alt = function(){
var json_stop_words = this.json_grammar_definition.stop_word;
var size = json_stop_words.length;
var stop_words = "";
if(size > 0){
stop_words += "(";
for(var index=0; index < size ; ++index){
var stop_word = json_stop_words[index];
if (index > 0) {
stop_words += "|";
}
//create match pattern for: (1) stopword enclosed in spaces, (2) the stopword at 'line end' preceded by a space, (3) the stopword at 'line start' followed by a space
stop_words += " " + stop_word + " | " + stop_word + "$|^" + stop_word
+ " ";
}
stop_words += ")";
}
else {
//for empty stopword definition: match empty string
// (basically: remove nothing)
stop_words += '^$';
}
this.stop_words_regexp_alt = new RegExp(stop_words,"igm");
};
/**
* alternative version / regular expression for stopwords
* @memberOf mmir.SemanticInterpreter.setToCompatibilityModeExtension.GrammarConverter
*/
grammarConverter.prototype.getStopWordsRegExpr_alt = function(){
if(!this.stop_words_regexp_alt){
this.parseStopWords_alt();
}
return this.stop_words_regexp_alt;
};
grammarConverter.prototype.encodeUmlauts = encodeUtils.encodeUmlauts;
grammarConverter.prototype.decodeUmlauts = encodeUtils.decodeUmlauts;
};
});