Currently only in beta-status, an xwork-tiger project exists that is starting to add some basic J2SE 5 ("Tiger") support to WebWork. Currently, the only Java 5 implementation in xwork-tiger.jar is a Map and Collection support using generics.

In short, instead of specifying the types found in collections and maps as documented in Type Conversion, the collection's generic type is used. This means you most likely don't need any ClassName-conversion.properties files.

Work in progress

This is a work in progress and not yet finished! More complex examples will follow. For now, have a look at the unit tests within the xwork-tiger project path.

Type Conversion Annotations

If you want to use annotation based type conversion, you have to annotate the class or interface with the Conversion Annotation.
Currently runtime evaluation for these annotations is not supported. This feature will be added in the near future.

For now you have to run the apt target via ant (TODO: not yet in CVS).

@Conversion

The Conversion annotation must be applied at Type level.

Parameter	Required	Default	Notes
conversion	no		Used for Type Conversions being applied at Type level.

@TypeConversion

Parameter	Required	Default	Notes
property	no	The annotated property name	The optional property name used within TYPE or PACKAGE level annotations.
type	no	ConversionType.CLASS	Enum value of ConversionType. Determines whether the conversion should be applied at application or class level.
converter	yes		The class of the TypeConverter to be used as converter.
rule	no	ConversionRule.PROPERTY	Enum value of ConversionRule. The ConversionRule can be a property, a Collection or a Map.

The TypeConversion annotation can be applied at property and method level.

Example:

@Conversion()
public class ConversionAction implements Action {

    private String convertInt;

    private String convertDouble;

    private List users = null;

    private HashMap keyValues = null;

    @TypeConversion(type = ConversionType.APPLICATION, converter = XWorkBasicConverter.class)
    public void setConvertInt( String convertInt ) {
        this.convertInt = convertInt;
    }

    @TypeConversion(converter = XWorkBasicConverter.class)
    public void setConvertDouble( String convertDouble ) {
        this.convertDouble = convertDouble;
    }

    @TypeConversion(rule = ConversionRule.COLLECTION, converter = String.class)
    public void setUsers( List users ) {
        this.users = users;
    }

    @TypeConversion(rule = ConversionRule.MAP, converter = BigInteger.class)
    public void setKeyValues( HashMap keyValues ) {
        this.keyValues = keyValues;
    }

    @TypeConversion(type = ConversionType.APPLICATION, property = "java.util.Date", converter = XWorkBasicConverter.class)
    public String execute() throws Exception {
        return SUCCESS;
    }
}

Validation Annotations

If you want to use annotation based validation, you have to annotate the class or interface with Validation Annotation.

These are the standard validator annotations that come with XWork-tiger:

@Validations

If you want to use several annotations of the same type, these annotation must be nested within the @Validations() annotation.

The possible parameters for @Validations() are as followed:

Parameter	Required	Notes
requiredFields	no	Add list of RequiredFieldValidators
customValidators	no	Add list of CustomValidators
conversionErrorFields	no	Add list of ConversionErrorFieldValidators
dateRangeFields	no	Add list of DateRangeFieldValidators
emails	no	Add list of EmailValidators
fieldExpressions	no	Add list of FieldExpressionValidators
intRangeFields	no	Add list of IntRangeFieldValidators
requiredFields	no	Add list of RequiredFieldValidators
requiredStrings	no	Add list of RequiredStringValidators
stringLengthFields	no	Add list of StringLengthFieldValidators
urls	no	Add list of UrlValidators
visitorFields	no	Add list of VisitorFieldValidators
stringRegexs	no	Add list of StringRegexValidator
regexFields	no	Add list of RegexFieldValidator
expressions	no	Add list of ExpressionValidator

   @Validations(
            requiredFields =
                    {@RequiredFieldValidator(type = ValidatorType.SIMPLE, fieldName = "customfield", message = "You must enter a value for field.")},
            requiredStrings =
                    {@RequiredStringValidator(type = ValidatorType.SIMPLE, fieldName = "stringisrequired", message = "You must enter a value for string.")},
            emails =
                    { @EmailValidator(type = ValidatorType.SIMPLE, fieldName = "emailaddress", message = "You must enter a value for email.")},
            urls =
                    { @UrlValidator(type = ValidatorType.SIMPLE, fieldName = "hreflocation", message = "You must enter a value for email.")},
            stringLengthFields =
                    {@StringLengthFieldValidator(type = ValidatorType.SIMPLE, trim = true, minLength="10" , maxLength = "12", fieldName = "needstringlength", message = "You must enter a stringlength.")},
            intRangeFields =
                    { @IntRangeFieldValidator(type = ValidatorType.SIMPLE, fieldName = "intfield", min = "6", max = "10", message = "bar must be between ${min} and ${max}, current value is ${bar}.")},
            dateRangeFields =
                    {@DateRangeFieldValidator(type = ValidatorType.SIMPLE, fieldName = "datefield", min = "-1", max = "99", message = "bar must be between ${min} and ${max}, current value is ${bar}.")},
            expressions = {
                @ExpressionValidator(expression = "foo &gt; 1", message = "Foo must be greater than Bar 1. Foo = ${foo}, Bar = ${bar}."),
                @ExpressionValidator(expression = "foo &gt; 2", message = "Foo must be greater than Bar 2. Foo = ${foo}, Bar = ${bar}."),
                @ExpressionValidator(expression = "foo &gt; 3", message = "Foo must be greater than Bar 3. Foo = ${foo}, Bar = ${bar}."),
                @ExpressionValidator(expression = "foo &gt; 4", message = "Foo must be greater than Bar 4. Foo = ${foo}, Bar = ${bar}."),
                @ExpressionValidator(expression = "foo &gt; 5", message = "Foo must be greater than Bar 5. Foo = ${foo}, Bar = ${bar}.")
    }
    )
    public String execute() throws Exception {
        return SUCCESS;
    }

@RequiredFieldValidator

This validator checks that a field is non-null.

Example:

@RequiredFieldValidator(message = "Default message", key = "i18n.key", shortCircuit = true)

@RequiredStringValidator

This validator checks that a String field is not empty (i.e. non-null with a length > 0).

Parameter	Required	Default	Notes
trim	no	true	Boolean property. Determines whether the String is trimmed before performing the length check.

Example:

@RequiredStringValidator(message = "Default message", key = "i18n.key", shortCircuit = true, trim = true)

@StringLengthFieldValidator

This validator checks that a String field is of the right length. It assumes that the field is a String.

Parameter	Required	Default	Notes
trim	no	true	Boolean property. Determines whether the String is trimmed before performing the length check.
minLength	no		Integer property. The minimum length the String must be.
maxLength	no		Integer property. The maximum length the String can be.

If neither minLength nor maxLength is set, nothing will be done.

Example:

@StringLengthFieldValidator(message = "Default message", key = "i18n.key", shortCircuit = true, trim = true, minLength = "5",  maxLength = "12")

@StringRegexValidator

This validator checks that a String field matches a configure Regular Expression, if it is not an empty String.

Parameter	Required	Default	Notes
regex	yes	"."	String property. The Regular Expression for which to check a match.
caseSensitive	no	true	Whether the matching of alpha characters in the expression should be done case-sensitively.

Example:

@StringRegexValidator(message = "Default message", key = "i18n.key", shortCircuit = true, regex = "a regular expression", caseSensitive = true)

@EmailValidator

This validator checks that a field is a valid e-mail address if it contains a non-empty String.

Example:

@EmailValidator(message = "Default message", key = "i18n.key", shortCircuit = true)

@UrlValidator

This validator checks that a field is a valid URL.

Example:

@UrlValidator(message = "Default message", key = "i18n.key", shortCircuit = true)

@IntRangeFieldValidator

This validator checks that a numeric field has a value within a specified range.

Parameter	Required	Default	Notes
min	no		Integer property. The minimum the number must be.
max	no		Integer property. The maximum number can be.

If neither min nor max is set, nothing will be done.

The values for min and max must be inserted as String values so that "0" can be handled as a possible value.

Example:

@IntRangeFieldValidator(message = "Default message", key = "i18n.key", shortCircuit = true, min = "0", max = "42")

@DateRangeFieldValidator

This validator checks that a date field has a value within a specified range.

Parameter	Required	Default	Notes
min	no		Date property. The minimum the date must be.
max	no		Date property. The maximum date can be.

If neither min nor max is set, nothing will be done.

Example:

@DateRangeFieldValidator(message = "Default message", key = "i18n.key", shortCircuit = true, min = "2005/01/01", max = "2005/12/31")

@ConversionErrorFieldValidator

This validator checks if there are any conversion errors for a field and applies them if they exist. See Type Conversion Error Handling for details.

Example:

@ConversionErrorFieldValidator(message = "Default message", key = "i18n.key", shortCircuit = true)

@ExpressionValidator

This validator uses an OGNL expression to perform its validation. The error message will be added to the action if the expression returns false when it is evaluated against the value stack.

Parameter	Required	Default	Notes
expression	yes		An OGNL expression that returns a boolean value.

Example:

@ExpressionValidator(message = "Default message", key = "i18n.key", shortCircuit = true, expression = "an OGNL expression" )

@FieldExpressionValidator

This validator uses an OGNL expression to perform its validation. The error message will be added to the field if the expression returns false when it is evaluated against the value stack.

Parameter	Required	Default	Notes
expression	yes		An OGNL expression that returns a boolean value.

Example:

@FieldExpressionValidator(message = "Default message", key = "i18n.key", shortCircuit = true, expression = "an OGNL expression")

@VisitorFieldValidator

The validator allows you to forward validation to object properties of your action using the objects own validation files. This allows you to use the ModelDriven development pattern and manage your validations for your models in one place, where they belong, next to your model classes. The VisitorFieldValidator can handle either simple Object properties, Collections of Objects, or Arrays.

The error message for the VisitorFieldValidator will be appended in front of validation messages added by the validations for the Object message.

Parameter	Required	Default	Notes
context	no	action alias	Determines the context to use for validating the Object property. If not defined, the context of the Action validation is propogated to the Object property validation. In the case of Action validation, this context is the Action alias.
appendPrefix	no	true	Determines whether the field name of this field validator should be prepended to the field name of the visited field to determine the full field name when an error occurs. For example, suppose that the bean being validated has a "name" property. If appendPrefix is true, then the field error will be stored under the field "bean.name". If appendPrefix is false, then the field error will be stored under the field "name". If you are using the VisitorFieldValidator to validate the model from a ModelDriven Action, you should set appendPrefix to false unless you are using "model.name" to reference the properties on your model.

Example:

@VisitorFieldValidator(message = "Default message", key = "i18n.key", shortCircuit = true, context = "action alias", appendPrefix = true)

Here we see the context being overridden in the validator mapping, so the action alias context will not be propogated.

ModelDriven example:

@VisitorFieldValidator(message = "Default message", key = "i18n.key", shortCircuit = true, context = "action alias", appendPrefix = true)

This will use the model's validation rules and any errors messages will be applied directly (nothing is prefixed because of the empty message).

More Complex Examples

An Annotated Interface

Mark the interface with @Validation()
Apply standard or custom annoations at method level

@Validation()
public interface AnnotationDataAware {

    void setBarObj(Bar b);

    Bar getBarObj();

    @RequiredFieldValidator(message = "You must enter a value for data.")
    @RequiredStringValidator(message = "You must enter a value for data.")
    void setData(String data);

    String getData();
}

An Annotated Class

@Validation()
public class SimpleAnnotationAction extends ActionSupport {

    @RequiredFieldValidator(type = ValidatorType.FIELD, message = "You must enter a value for bar.")
    @IntRangeFieldValidator(type = ValidatorType.FIELD, min = "6", max = "10", message = "bar must be between ${min} and ${max}, current value is ${bar}.")
    public void setBar(int bar) {
        this.bar = bar;
    }

    public int getBar() {
        return bar;
    }

    @Validations(
            requiredFields =
                    {@RequiredFieldValidator(type = ValidatorType.SIMPLE, fieldName = "customfield", message = "You must enter a value for field.")},
            requiredStrings =
                    {@RequiredStringValidator(type = ValidatorType.SIMPLE, fieldName = "stringisrequired", message = "You must enter a value for string.")},
            emails =
                    { @EmailValidator(type = ValidatorType.SIMPLE, fieldName = "emailaddress", message = "You must enter a value for email.")},
            urls =
                    { @UrlValidator(type = ValidatorType.SIMPLE, fieldName = "hreflocation", message = "You must enter a value for email.")},
            stringLengthFields =
                    {@StringLengthFieldValidator(type = ValidatorType.SIMPLE, trim = true, minLength="10" , maxLength = "12", fieldName = "needstringlength", message = "You must enter a stringlength.")},
            intRangeFields =
                    { @IntRangeFieldValidator(type = ValidatorType.SIMPLE, fieldName = "intfield", min = "6", max = "10", message = "bar must be between ${min} and ${max}, current value is ${bar}.")},
            dateRangeFields =
                    {@DateRangeFieldValidator(type = ValidatorType.SIMPLE, fieldName = "datefield", min = "-1", max = "99", message = "bar must be between ${min} and ${max}, current value is ${bar}.")},
            expressions = {
                @ExpressionValidator(expression = "foo &gt; 1", message = "Foo must be greater than Bar 1. Foo = ${foo}, Bar = ${bar}."),
                @ExpressionValidator(expression = "foo &gt; 2", message = "Foo must be greater than Bar 2. Foo = ${foo}, Bar = ${bar}."),
                @ExpressionValidator(expression = "foo &gt; 3", message = "Foo must be greater than Bar 3. Foo = ${foo}, Bar = ${bar}."),
                @ExpressionValidator(expression = "foo &gt; 4", message = "Foo must be greater than Bar 4. Foo = ${foo}, Bar = ${bar}."),
                @ExpressionValidator(expression = "foo &gt; 5", message = "Foo must be greater than Bar 5. Foo = ${foo}, Bar = ${bar}.")
    }
    )
    public String execute() throws Exception {
        return SUCCESS;
    }
}

Child pages

J2SE 5 Support

Type Conversion Annotations

@Conversion

@TypeConversion

Validation Annotations

@Validations

@RequiredFieldValidator

@RequiredStringValidator

@StringLengthFieldValidator

@StringRegexValidator

@EmailValidator

@UrlValidator

@IntRangeFieldValidator

@DateRangeFieldValidator

@ConversionErrorFieldValidator

@ExpressionValidator

@FieldExpressionValidator

@VisitorFieldValidator

More Complex Examples

An Annotated Interface

An Annotated Class