double validator
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>
