Class StringLengthFieldValidator
java.lang.Object
org.apache.struts2.validator.validators.ValidatorSupport
org.apache.struts2.validator.validators.FieldValidatorSupport
org.apache.struts2.validator.validators.StringLengthFieldValidator
- All Implemented Interfaces:
FieldValidator,ShortCircuitableValidator,Validator
StringLengthFieldValidator checks that a String field is of a certain length. If the "minLength"
parameter is specified, it will make sure that the String has at least that many characters. If
the "maxLength" parameter is specified, it will make sure that the String has at most that many
characters. The "trim" parameter determines whether it will
trim the
String before performing the length check. If unspecified, the String will be trimmed.
- fieldName - The field name this validator is validating. Required if using Plain-Validator Syntax otherwise not required
- maxLength - Integer. The max length of the field value. Default ignore.
- minLength - Integer. The min length of the field value. Default ignore.
- trim - (Optional) Boolean, default true. Trim the field value before evaluating its min/max length. Default true.
- maxLengthExpression - (Optional) String. Defines the max length param as an OGNL expression
- minLengthExpression - (Optional) String. Defines the min length param as an OGNL expression
- trimExpression - (Optional) String. Defines th trim param as an OGNL expression
<validators>
<!-- Plain Validator Syntax -->
<validator type="stringlength">
<param name="fieldName">myPurchaseCode</param>
<param name="minLength">10</param>
<param name="maxLength">10</param>
<param name="trim">true</param>
<message>Your purchase code needs to be 10 characters long</message>
</validator>
<!-- Field Validator Syntax -->
<field name="myPurchaseCode">
<field-validator type="stringlength">
<param name="minLength">10</param>
<param name="maxLength">10</param>
<param name="trim">true</param>
<message>Your purchase code needs to be 10 characters long</message>
</field-validator>
</field>
<!-- Field Validator Syntax with expression -->
<field name="myPurchaseCode">
<field-validator type="stringlength">
<param name="minLengthExpression">${minLengthValue}</param> <!-- will be evaluated as: Integer getMinLengthValue() -->
<param name="maxLengthExpression">${maxLengthValue}</param> <!-- will be evaluated as: Integer getMaxLengthValue() -->
<param name="trimExpression">${trimValue}</param> <!-- will be evaluated as: boolean getTrimValue() -->
<message>Your purchase code needs to be 10 characters long</message>
</field-validator>
</field>
</validators>
- Author:
- Jason Carreira, Mark Woon, tmjee
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Field Summary
Fields inherited from class org.apache.struts2.validator.validators.FieldValidatorSupport
currentValue, fieldName, typeFields inherited from class org.apache.struts2.validator.validators.ValidatorSupport
defaultMessage, EMPTY_STRING, messageKey, stack, textProviderFactory -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionintintbooleanisTrim()voidsetMaxLength(int maxLength) voidsetMaxLengthExpression(String maxLengthExpression) voidsetMinLength(int minLength) voidsetMinLengthExpression(String minLengthExpression) voidsetTrim(boolean trim) voidsetTrimExpression(String trimExpression) voidThe validation implementation must guarantee that setValidatorContext will be called with a non-null ValidatorContext before validate is called.protected voidvalidateValue(Object object, Object value) Methods inherited from class org.apache.struts2.validator.validators.FieldValidatorSupport
getCurrentValue, getFieldName, getValidatorType, setFieldName, setValidatorTypeMethods inherited from class org.apache.struts2.validator.validators.ValidatorSupport
addActionError, addFieldError, getDefaultMessage, getFieldValue, getMessage, getMessageKey, getMessageParameters, getValidatorContext, isShortCircuit, parse, setDefaultMessage, setMessageKey, setMessageParameters, setShortCircuit, setTextProviderFactory, setValidatorContext, setValueStackMethods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitMethods inherited from interface org.apache.struts2.validator.Validator
getDefaultMessage, getMessage, getMessageKey, getMessageParameters, getValidatorContext, setDefaultMessage, setMessageKey, setMessageParameters, setValidatorContext, setValueStack
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Constructor Details
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StringLengthFieldValidator
public StringLengthFieldValidator()
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Method Details
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setMaxLength
public void setMaxLength(int maxLength) -
setMaxLengthExpression
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getMaxLength
public int getMaxLength() -
setMinLength
public void setMinLength(int minLength) -
setMinLengthExpression
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getMinLength
public int getMinLength() -
setTrim
public void setTrim(boolean trim) -
setTrimExpression
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isTrim
public boolean isTrim() -
validate
Description copied from interface:ValidatorThe validation implementation must guarantee that setValidatorContext will be called with a non-null ValidatorContext before validate is called.- Parameters:
object- the object to be validated.- Throws:
ValidationException- is thrown if there is validation error(s).
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validateValue
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