Package org.apache.commons.validator.routines

Class DoubleValidator

java.lang.Object

org.apache.commons.validator.routines.AbstractFormatValidator

org.apache.commons.validator.routines.AbstractNumberValidator

org.apache.commons.validator.routines.DoubleValidator

All Implemented Interfaces:

java.io.Serializable

public class DoubleValidator
extends AbstractNumberValidator

Double Validation and Conversion routines (java.lang.Double).

This validator provides a number of methods for validating/converting a String value to a Double using java.text.NumberFormat to parse either:

• using the default format for the default Locale
• using a specified pattern with the default Locale
• using the default format for a specified Locale
• using a specified pattern with a specified Locale

Use one of the isValid() methods to just validate or one of the validate() methods to validate and receive a converted Double value.

Once a value has been successfully converted the following methods can be used to perform minimum, maximum and range checks:

• minValue() checks whether the value is greater than or equal to a specified minimum.
• maxValue() checks whether the value is less than or equal to a specified maximum.
• isInRange() checks whether the value is within a specified range of values.

So that the same mechanism used for parsing an input value for validation can be used to format output, corresponding format() methods are also provided. That is you can format either:

• using the default format for the default Locale
• using a specified pattern with the default Locale
• using the default format for a specified Locale
• using a specified pattern with a specified Locale

Since:

Validator 1.3.0

Version:

$Revision: 1649191 $

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
private static long	serialVersionUID
private static DoubleValidator	VALIDATOR

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

CURRENCY_FORMAT, PERCENT_FORMAT, STANDARD_FORMAT

Constructor Summary

Constructors

Constructor	Description
DoubleValidator()	Construct a strict instance.
DoubleValidator(boolean strict, int formatType)	Construct an instance with the specified strict setting and format type.

Method Summary

Modifier and Type	Method	Description
static DoubleValidator	getInstance()	Return a singleton instance of this validator.
boolean	isInRange(double value, double min, double max)	Check if the value is within a specified range.
boolean	isInRange(java.lang.Double value, double min, double max)	Check if the value is within a specified range.
boolean	maxValue(double value, double max)	Check if the value is less than or equal to a maximum.
boolean	maxValue(java.lang.Double value, double max)	Check if the value is less than or equal to a maximum.
boolean	minValue(double value, double min)	Check if the value is greater than or equal to a minimum.
boolean	minValue(java.lang.Double value, double min)	Check if the value is greater than or equal to a minimum.
protected java.lang.Object	processParsedValue(java.lang.Object value, java.text.Format formatter)	Convert the parsed value to a Double.
java.lang.Double	validate(java.lang.String value)	Validate/convert a Double using the default Locale.
java.lang.Double	validate(java.lang.String value, java.lang.String pattern)	Validate/convert a Double using the specified pattern.
java.lang.Double	validate(java.lang.String value, java.lang.String pattern, java.util.Locale locale)	Validate/convert a Double using the specified pattern and/ or Locale.
java.lang.Double	validate(java.lang.String value, java.util.Locale locale)	Validate/convert a Double using the specified Locale.

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, parse

Methods inherited from class java.lang.Object

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

Field Detail

serialVersionUID

private static final long serialVersionUID

See Also:

Constant Field Values

VALIDATOR

private static final DoubleValidator VALIDATOR

Constructor Detail

DoubleValidator

public DoubleValidator()

Construct a strict instance.

DoubleValidator

public DoubleValidator(boolean strict,
                       int formatType)

Construct an instance with the specified strict setting and format type.

The formatType specified what type of NumberFormat is created - valid types are:

• AbstractNumberValidator.STANDARD_FORMAT -to create standard number formats (the default).
• AbstractNumberValidator.CURRENCY_FORMAT -to create currency number formats.
• AbstractNumberValidator.PERCENT_FORMAT -to create percent number formats (the default).

Parameters:

strict - true if strict Format parsing should be used.

formatType - The NumberFormat type to create for validation, default is STANDARD_FORMAT.

Method Detail

getInstance

public static DoubleValidator getInstance()

Return a singleton instance of this validator.

Returns:

A singleton instance of the DoubleValidator.

validate

public java.lang.Double validate(java.lang.String value)

Validate/convert a Double using the default Locale.

Parameters:

value - The value validation is being performed on.

Returns:

The parsed Double if valid or null if invalid.

validate

public java.lang.Double validate(java.lang.String value,
                                 java.lang.String pattern)

Validate/convert a Double using the specified pattern.

Parameters:

value - The value validation is being performed on.

pattern - The pattern used to validate the value against.

Returns:

The parsed BigDecimal if valid or null if invalid.

validate

public java.lang.Double validate(java.lang.String value,
                                 java.util.Locale locale)

Validate/convert a Double using the specified Locale.

Parameters:

value - The value validation is being performed on.

locale - The locale to use for the number format, system default if null.

Returns:

The parsed Double if valid or null if invalid.

validate

public java.lang.Double validate(java.lang.String value,
                                 java.lang.String pattern,
                                 java.util.Locale locale)

Validate/convert a Double using the specified pattern and/ or Locale.

Parameters:

value - The value validation is being performed on.

pattern - The pattern used to validate the value against, or the default for the Locale if null.

locale - The locale to use for the date format, system default if null.

Returns:

The parsed Double if valid or null if invalid.

isInRange

public boolean isInRange(double value,
                         double min,
                         double max)

Check if the value is within a specified range.

Parameters:

value - The Number value to check.

min - The minimum value of the range.

max - The maximum value of the range.

Returns:

true if the value is within the specified range.

isInRange

public boolean isInRange(java.lang.Double value,
                         double min,
                         double max)

Check if the value is within a specified range.

Parameters:

value - The Number value to check.

min - The minimum value of the range.

max - The maximum value of the range.

Returns:

true if the value is within the specified range.

minValue

public boolean minValue(double value,
                        double min)

Check if the value is greater than or equal to a minimum.

Parameters:

value - The value validation is being performed on.

min - The minimum value.

Returns:

true if the value is greater than or equal to the minimum.

minValue

public boolean minValue(java.lang.Double value,
                        double min)

Check if the value is greater than or equal to a minimum.

Parameters:

value - The value validation is being performed on.

min - The minimum value.

Returns:

true if the value is greater than or equal to the minimum.

maxValue

public boolean maxValue(double value,
                        double max)

Check if the value is less than or equal to a maximum.

Parameters:

value - The value validation is being performed on.

max - The maximum value.

Returns:

true if the value is less than or equal to the maximum.

maxValue

public boolean maxValue(java.lang.Double value,
                        double max)

Check if the value is less than or equal to a maximum.

Parameters:

value - The value validation is being performed on.

max - The maximum value.

Returns:

true if the value is less than or equal to the maximum.

processParsedValue

protected java.lang.Object processParsedValue(java.lang.Object value,
                                              java.text.Format formatter)

Convert the parsed value to a Double.

Specified by:

processParsedValue in class AbstractNumberValidator

Parameters:

value - The parsed Number object created.

formatter - The Format used to parse the value with.

Returns:

The validated/converted Double value if valid or null if invalid.