Package 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 (that is, 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 (such as byte, short, integer, long and BigInteger) since percentages are converted to fractions (for example, `50%` is converted to `0.5`).

Since:
  1.3.0
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
  Description
  `PercentValidator()`
  Constructs a strict instance.
  `PercentValidator(boolean strict)`
  Constructs an instance with the specified strict setting.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `static BigDecimalValidator`
  `getInstance()`
  Gets the 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 Details

  - ### PercentValidator

    public PercentValidator()
    Constructs a strict instance.

  - ### PercentValidator

    public PercentValidator(boolean strict)
    Constructs an instance with the specified strict setting.
    Parameters:
      `strict` - `true` if strict `Format` parsing should be used.

- ## Method Details

  - ### getInstance

    public static BigDecimalValidator getInstance()
    Gets the 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.