CronExpressionの検証コードJavaScript


ずっと正規表現でCronExpressionの検証コードを書こうと思っていましたが、JavaScriptのレベルが限られているため、関連資料を調べてみると、クロン表現、の正規表現は書きにくいと思いました.したがって、CronExpressionValidatorクラスの考え方に基づいて、Cron Expression Validatorを書き換え、検証を行うのが便利になります.
 
    /**
     * Validates a cron expression.
     *
     * @param cronExpression The expression to validate
     * @return True is expression is valid
     */
    function cronValidate(cronExpression ){
        //alert("       !");
        var cronParams = cronExpression.split(" ");

        if (cronParams.length < 6 || cronParams.length > 7) {
            return false;
        }

        //CronTrigger cronTrigger = new CronTrigger();
        //cronTrigger.setCronExpression( cronExpression );

        if (cronParams[3] == "?" || cronParams[5]=="?") {
            //Check seconds param
            if (!checkSecondsField(cronParams[0])) {
                return false;
            }

            //Check minutes param
            if (!checkMinutesField(cronParams[1])) {
                return false;
            }

            //Check hours param
            if (!checkHoursField(cronParams[2])) {
                return false;
            }

            //Check day-of-month param
            if (!checkDayOfMonthField(cronParams[3])) {
                return false;
            }

            //Check months param
            if (!checkMonthsField(cronParams[4])) {
                return false;
            }

            //Check day-of-week param
            if (!checkDayOfWeekField(cronParams[5])) {
                return false;
            }

            //Check year param
            if (cronParams.length == 7) {
                if (!checkYearField(cronParams[6])) {
                    return false;
                }
            }

            return true;
        } else {
            return false;
        }
    }

    function checkSecondsField(secondsField) {
        return checkField(secondsField, 0, 59);
    }


    function checkField(secondsField, minimal, maximal) {
        if (secondsField.indexOf("-") > -1 ) {
            var startValue = secondsField.substring(0, secondsField.indexOf( "-" ));
            var endValue = secondsField.substring(secondsField.indexOf( "-" ) + 1);

            if (!(checkIntValue(startValue, minimal, maximal, true) && checkIntValue(endValue, minimal, maximal, true))) {
                return false;
            }
            try {
                var startVal = parseInt(startValue, 10);
                var endVal = parseInt(endValue, 10);

                return endVal > startVal;
            } catch (e) {
                return false;
            }
        } else if (secondsField.indexOf(",") > -1) {
            return checkListField(secondsField, minimal, maximal);
        } else if (secondsField.indexOf( "/" ) > -1) {
            return checkIncrementField( secondsField, minimal, maximal );
        } else if (secondsField.indexOf( "*" ) != -1) {
            return true;
        } else {
            return checkIntValue(secondsField, minimal, maximal);
        }
    }

    function checkIntValue(value, minimal, maximal, checkExtremity) {
        try {
            var val = parseInt(value, 10);
            //       
            if (value == val) {
                if (checkExtremity) {
                    if (val < minimal || val > maximal) {
                        return false;
                    }
                }

                return true;
            }

            return false;
        } catch (e) {
            return false;
        }
    }

    function checkMinutesField(minutesField) {
        return checkField(minutesField, 0, 59);
    }

    function checkHoursField(hoursField) {
        return checkField(hoursField, 0, 23);
    }

    function checkDayOfMonthField(dayOfMonthField) {
        if (dayOfMonthField == "?") {
            return true;
        }

        if (dayOfMonthField.indexOf("L") >= 0) {
            return checkFieldWithLetter(dayOfMonthField, "L", 1, 7, -1, -1);
        } else if ( dayOfMonthField.indexOf("W") >= 0) {
            return checkFieldWithLetter(dayOfMonthField, "W", 1, 31, -1, -1);
        } else if (dayOfMonthField.indexOf("C") >= 0) {
            return checkFieldWithLetter(dayOfMonthField, "C", 1, 31, -1, -1);
        } else {
            return checkField( dayOfMonthField, 1, 31 );
        }
    }


    function checkMonthsField(monthsField) {
/*        monthsField = StringUtils.replace( monthsField, "JAN", "1" );
        monthsField = StringUtils.replace( monthsField, "FEB", "2" );
        monthsField = StringUtils.replace( monthsField, "MAR", "3" );
        monthsField = StringUtils.replace( monthsField, "APR", "4" );
        monthsField = StringUtils.replace( monthsField, "MAY", "5" );
        monthsField = StringUtils.replace( monthsField, "JUN", "6" );
        monthsField = StringUtils.replace( monthsField, "JUL", "7" );
        monthsField = StringUtils.replace( monthsField, "AUG", "8" );
        monthsField = StringUtils.replace( monthsField, "SEP", "9" );
        monthsField = StringUtils.replace( monthsField, "OCT", "10" );
        monthsField = StringUtils.replace( monthsField, "NOV", "11" );
        monthsField = StringUtils.replace( monthsField, "DEC", "12" );*/

        monthsField.replace("JAN", "1");
        monthsField.replace("FEB", "2");
        monthsField.replace("MAR", "3");
        monthsField.replace("APR", "4");
        monthsField.replace("MAY", "5");
        monthsField.replace("JUN", "6");
        monthsField.replace("JUL", "7");
        monthsField.replace("AUG", "8");
        monthsField.replace("SEP", "9");
        monthsField.replace("OCT", "10");
        monthsField.replace("NOV", "11");
        monthsField.replace("DEC", "12");

        return checkField(monthsField, 1, 31);
    }

    function checkDayOfWeekField(dayOfWeekField) {
/*        dayOfWeekField = StringUtils.replace( dayOfWeekField, "SUN", "1" );
        dayOfWeekField = StringUtils.replace( dayOfWeekField, "MON", "2" );
        dayOfWeekField = StringUtils.replace( dayOfWeekField, "TUE", "3" );
        dayOfWeekField = StringUtils.replace( dayOfWeekField, "WED", "4" );
        dayOfWeekField = StringUtils.replace( dayOfWeekField, "THU", "5" );
        dayOfWeekField = StringUtils.replace( dayOfWeekField, "FRI", "6" );
        dayOfWeekField = StringUtils.replace( dayOfWeekField, "SAT", "7" );*/

        dayOfWeekField.replace("SUN", "1" );
        dayOfWeekField.replace("MON", "2" );
        dayOfWeekField.replace("TUE", "3" );
        dayOfWeekField.replace("WED", "4" );
        dayOfWeekField.replace("THU", "5" );
        dayOfWeekField.replace("FRI", "6" );
        dayOfWeekField.replace("SAT", "7" );        

        if (dayOfWeekField == "?") {
            return true;
        }

        if (dayOfWeekField.indexOf("L") >= 0) {
            return checkFieldWithLetter(dayOfWeekField, "L", 1, 7, -1, -1);
        } else if (dayOfWeekField.indexOf("C") >= 0) {
            return checkFieldWithLetter(dayOfWeekField, "C", 1, 7, -1, -1);
        } else if (dayOfWeekField.indexOf("#") >= 0) {
            return checkFieldWithLetter(dayOfWeekField, "#", 1, 7, 1, 5);
        } else {
            return checkField(dayOfWeekField, 1, 7);
        }
    }

    function checkYearField(yearField) {
        return checkField(yearField, 1970, 2099);
    }


    function checkFieldWithLetter(value, letter, minimalBefore, maximalBefore,
                                          minimalAfter, maximalAfter) {
        var canBeAlone = false;
        var canHaveIntBefore = false;
        var canHaveIntAfter = false;
        var mustHaveIntBefore = false;
        var mustHaveIntAfter = false;

        if (letter == "L") {
            canBeAlone = true;
            canHaveIntBefore = true;
            canHaveIntAfter = false;
            mustHaveIntBefore = false;
            mustHaveIntAfter = false;
        }
        if (letter == "W" || letter == "C") {
            canBeAlone = false;
            canHaveIntBefore = true;
            canHaveIntAfter = false;
            mustHaveIntBefore = true;
            mustHaveIntAfter = false;
        }
        if (letter == "#") {
            canBeAlone = false;
            canHaveIntBefore = true;
            canHaveIntAfter = true;
            mustHaveIntBefore = true;
            mustHaveIntAfter = true;
        }

        var beforeLetter = "";
        var afterLetter = "";

        if (value.indexOf(letter) >= 0 ) {
            beforeLetter = value.substring( 0, value.indexOf(letter));
        }

        if (!value.endsWith(letter)) {
            afterLetter = value.substring( value.indexOf( letter ) + 1 );
        }

        if (value.indexOf(letter) >= 0) {
            if (letter == value) {
                return canBeAlone;
            }

            if (canHaveIntBefore) {
                if (mustHaveIntBefore && beforeLetter.length == 0) {
                    return false;
                }

                if (!checkIntValue(beforeLetter, minimalBefore, maximalBefore, true)){
                    return false;
                }
            } else {
                if (beforeLetter.length > 0 ) {
                    return false;
                }
            }

            if (canHaveIntAfter) {
                if ( mustHaveIntAfter && afterLetter.length == 0 ) {
                    return false;
                }

                if (!checkIntValue(afterLetter, minimalAfter, maximalAfter, true)) {
                    return false;
                }
            } else {
                if (afterLetter.length > 0) {
                    return false;
                }
            }
        }

        return true;
    }

/*    function checkIntValue(value, minimal, maximal) {
        return checkIntValue(value, minimal, maximal, true);
    } */

    function checkIncrementField(value, minimal, maximal) {
        var start = value.substring(0, value.indexOf("/"));

        var increment = value.substring(value.indexOf("/") + 1);

        if (!("*" == start)) {
            return checkIntValue(start, minimal, maximal, true) && checkIntValue(increment, minimal, maximal, false);
        } else {
            return checkIntValue(increment, minimal, maximal, true);
        }
    }



    function checkListField(value, minimal, maximal ) {
        var st = value.split(",");

        var values = new Array(st.length);

        for(var j = 0; j < st.length; j++) {
            values[j] = st[j];
        }

        var previousValue = -1;

        for (var i= 0; i < values.length; i++) {
            var currentValue = values[i];

            if (!checkIntValue(currentValue, minimal, maximal, true)) {
                return false;
            }

            try {
                var val = parseInt(currentValue, 10);

                if (val <= previousValue) {
                    return false;
                } else {
                    previousValue = val;
                }
            } catch (e) {
                // we have always an int
            }
        }

        return true;
    }

 
これによりextではカスタム検証関数を指定するだけで済みます
       {    id:'custom',
            title:'   ',
            layout:'form',
            name:'custom',            
            defaults: {width: 230},
            items: [{
                xtype : 'textfield',
                fieldLabel : '     ',
                name : 'fcronexp',
                validator: cronValidate
            }]
        }
        ]
       },