org.apache.commons.validator.routines

## Class PercentValidator

- java.lang.Object
- - org.apache.commons.validator.routines.AbstractFormatValidator
  - - org.apache.commons.validator.routines.AbstractNumberValidator
    - - org.apache.commons.validator.routines.BigDecimalValidator
      - - org.apache.commons.validator.routines.PercentValidator

- All Implemented Interfaces:
    Serializable

      public class PercentValidator
      extends BigDecimalValidator

  Percentage Validation and Conversion routines (`java.math.BigDecimal`).

  This is one implementation of a percent validator that has the following features:

  - It is lenient about the presence of the percent symbol
  - It converts the percent to a `java.math.BigDecimal`

  However any of the number validators can be used for percent validation. For example, if you wanted a percent validator that converts to a `java.lang.Float` then you can simply instantiate an `FloatValidator` with the appropriate format type:

  `... = new FloatValidator(false, FloatValidator.PERCENT_FORMAT);`

  Pick the appropriate validator, depending on the type (i.e Float, Double or BigDecimal) you want the percent converted to. Please note, it makes no sense to use one of the validators that doesn't handle fractions (i.e. byte, short, integer, long and BigInteger) since percentages are converted to fractions (i.e `50%` is converted to `0.5`).

  Since:
    Validator 1.3.0
  Version:
    $Revision$
  See Also:
    Serialized Form

- - ### Field Summary

    - ### Fields inherited from class org.apache.commons.validator.routines.AbstractNumberValidator

      `CURRENCY_FORMAT, PERCENT_FORMAT, STANDARD_FORMAT`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `PercentValidator()` Construct a strict instance.
    `PercentValidator(boolean strict)` Construct an instance with the specified strict setting.

  - ### Method Summary

    All Methods Static Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `static BigDecimalValidator` | `getInstance()` Return a singleton instance of this validator.
    `protected Object` | `parse(String value, Format formatter)` Parse the value with the specified `Format`.

    - ### Methods inherited from class org.apache.commons.validator.routines.BigDecimalValidator

      `isInRange, maxValue, minValue, processParsedValue, validate, validate, validate, validate`

    - ### Methods inherited from class org.apache.commons.validator.routines.AbstractNumberValidator

      `determineScale, getFormat, getFormat, getFormatType, isAllowFractions, isInRange, isValid, maxValue, minValue, parse`

    - ### Methods inherited from class org.apache.commons.validator.routines.AbstractFormatValidator

      `format, format, format, format, format, isStrict, isValid, isValid, isValid`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### PercentValidator

          public PercentValidator()

      Construct a strict instance.

    - #### PercentValidator

          public PercentValidator(boolean strict)

      Construct an instance with the specified strict setting.
      Parameters:
        `strict` - `true` if strict `Format` parsing should be used.

  - ### Method Detail

    - #### getInstance

          public static BigDecimalValidator getInstance()

      Return a singleton instance of this validator.
      Returns:
        A singleton instance of the PercentValidator.

    - #### parse

          protected Object parse(String value,
                                 Format formatter)

      Parse the value with the specified `Format`.

      This implementation is lenient whether the currency symbol is present or not. The default `NumberFormat` behavior is for the parsing to "fail" if the currency symbol is missing. This method re-parses with a format without the currency symbol if it fails initially.

      Overrides:
        `parse` in class `AbstractFormatValidator`
      Parameters:
        `value` - The value to be parsed.
        `formatter` - The Format to parse the value with.
      Returns:
        The parsed value if valid or `null` if invalid.

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