org.esa.beam.framework.param.validators
Class NumberValidator

java.lang.Object
  org.esa.beam.framework.param.AbstractParamValidator
      org.esa.beam.framework.param.validators.NumberValidator

All Implemented Interfaces:

ParamValidator

public class NumberValidator
extends AbstractParamValidator

Field Summary

Fields inherited from class org.esa.beam.framework.param.AbstractParamValidator

_logger

Constructor Summary

NumberValidator()

Method Summary

protected static Number	castToNumber(Object value)
boolean	equalValues(Parameter parameter, Object value1, Object value2) Compares two parameter values for equality.
String	format(Parameter parameter, Object value) Returns the given number value as a string, according to the rules of the parameter.
protected void	handleOutOfRangeError(Parameter parameter)
Object	parse(Parameter parameter, String text) Converts the given text into a value taking the given parameter information into account.
void	validate(Parameter parameter, Object value) Tests if the given value passes all constraints given in the supplied parameter information.

Methods inherited from class org.esa.beam.framework.param.AbstractParamValidator

isAllowedNullText, isAllowedNullValue, isValueContainedInValueSet, validateThatNullValueIsAllowed, validateThatValueIsInValueSet, validateThatValuesAreInValueSet

Methods inherited from class java.lang.Object

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

Constructor Detail

NumberValidator

public NumberValidator()

Method Detail

parse

public Object parse(Parameter parameter,
                    String text)
             throws ParamParseException

Description copied from interface: ParamValidator

Converts the given text into a value taking the given parameter information into account.

Parameters:

parameter - the parameter, must not be null

text - the text to be converted into a value, must not be null

Returns:

the value represented by the text

Throws:

ParamParseException

format

public String format(Parameter parameter,
                     Object value)
              throws ParamFormatException

Returns the given number value as a string, according to the rules of the parameter. If the value is null and null value is allowed, this method returns an empty string, otherwise a ParamFormatException will be thrown.

Parameters:

parameter - the parameter which contains the rules to format

value - the value to format

Returns:

the value as string or an empty string.

Throws:

ParamFormatException - if the value is null and null value is not allowed or the value is not an instance of Number.

validate

public void validate(Parameter parameter,
                     Object value)
              throws ParamValidateException

Description copied from interface: ParamValidator

Tests if the given value passes all constraints given in the supplied parameter information. The value can also be null since parameters can be allowed to have the value 'null'.

Parameters:

parameter - the parameter, must not be null

value - the value to be tested, can be null

Throws:

ParamValidateException

equalValues

public boolean equalValues(Parameter parameter,
                           Object value1,
                           Object value2)

Compares two parameter values for equality. It is assumed that both objects passed in as parametrer are numbers.

Specified by:

equalValues in interface ParamValidator

Overrides:

equalValues in class AbstractParamValidator

Parameters:

parameter - not used in this context

value1 - first value to be compared

value2 - second value to be compared

Returns:

true if the value are equal, false otherwise

handleOutOfRangeError

protected void handleOutOfRangeError(Parameter parameter)
                              throws ParamValidateException

Throws:

ParamValidateException

castToNumber

protected static Number castToNumber(Object value)