layout: default title: double validator parent: title: Validation url: validation.html

double validator

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Description

Field Validator that checks if the double specified is within a certain range.

Parameters

  • fieldName - The field name this validator is validating. Required if using Plain-Validator Syntax otherwise not required.
  • minInclusive - the minimum inclusive value in FloatValue format specified by Java language (if none is specified, it will not be checked).
  • maxInclusive - the maximum inclusive value in FloatValue format specified by Java language (if none is specified, it will not be checked).
  • minExclusive - the minimum exclusive value in FloatValue format specified by Java language (if none is specified, it will not be checked).
  • maxExclusive - the maximum exclusive value in FloatValue format specified by Java language (if none is specified, it will not be checked).
  • minInclusiveExpression - the minimum inclusive value specified as a OGNL expression (if none is specified, it will not be checked).
  • maxInclusiveExpression - the maximum inclusive value specified as a OGNL expression (if none is specified, it will not be checked).
  • minExclusiveExpression - the minimum exclusive value specified as a OGNL expression (if none is specified, it will not be checked).
  • maxExclusiveExpression - the maximum exclusive value specified as a OGNL expression (if none is specified, it will not be checked).

You can specify either minInclusive, maxInclusive, minExclusive and maxExclusive or minInclusiveExpression, maxInclusiveExpression, minExclusiveExpression and maxExclusiveExpression as a OGNL expression, see example below. You can always try to mix params but be aware that such behaviour was not tested.

Warning: do not use ${minInclusiveExpression}, ${maxInclusiveExpression}, ${minExclusiveExpressionExpression} and ${maxExclusive} as an expression as this will turn into infinitive loop!

Examples

<validators>
    <!-- Plain Validator Syntax -->
    <validator type="double">
        <param name="fieldName">percentage</param>
        <param name="minInclusive">20.1</param>
        <param name="maxInclusive">50.1</param>
        <message>Age needs to be between ${minInclusive} and ${maxInclusive} (inclusive)</message>
    </validator>
 
    <!-- Field Validator Syntax -->
    <field name="percentage">
        <field-validator type="double">
            <param name="minExclusive">0.123</param>
            <param name="maxExclusive">99.98</param>
            <message>Percentage needs to be between ${minExclusive} and ${maxExclusive} (exclusive)</message>
        </field-validator>
    </field>
 
    <!-- Field Validator Syntax with expression -->
    <field name="percentage">
        <field-validator type="double">
            <param name="minExclusiveExpression">${minExclusiveValue}</param> <!-- will be evaluated as: Double getMinExclusiveValue() -->
            <param name="maxExclusiveExpression">${maxExclusiveValue}</param> <!-- will be evaluated as: Double getMaxExclusiveValue() -->
            <message>Percentage needs to be between ${minExclusive} and ${maxExclusive} (exclusive)</message>
        </field-validator>
    </field>
</validators>