Validator

org.eclipse.wst.validation.validator

This extension point is part of an interim API that is still under development and expected to change significantly before reaching stability. It is being made available at this early stage to solicit feedback from pioneering adopters on the understanding that any code that uses this API will almost certainly be broken (repeatedly) as the API evolves.

This extension point give the ability to create a new validator that can validate resources in a Java Project. The validator needs to registered for a given nature of the project for it to run on that project. The user can specifiy file filters to filter out files that need to be validated. The new validator registered by the project nature on the project can be run manually or incrementally if Auto Build is turned on, during incremental builds the changed delta of files are only validated if those files are part of the validation filters specified.

<!ELEMENT extension (validator)>

<!ATTLIST extension

point CDATA #REQUIRED

id    CDATA #REQUIRED

name  CDATA #REQUIRED>


<!ELEMENT validator (projectNature+ , filter+ , enablement , helper , dependentValidator? , run , markerId? , facet*)>

<!ATTLIST validator

to   CDATA #IMPLIED

from CDATA #IMPLIED>


<!ELEMENT projectNature EMPTY>

<!ATTLIST projectNature

id      CDATA #REQUIRED

include (true | false) >


<!ELEMENT filter EMPTY>

<!ATTLIST filter

objectClass   CDATA #REQUIRED

nameFilter    CDATA #REQUIRED

caseSensitive (true | false)

action        CDATA #IMPLIED>


<!ELEMENT helper EMPTY>

<!ATTLIST helper

class CDATA #REQUIRED>


<!ELEMENT dependentValidator EMPTY>

<!ATTLIST dependentValidator

depValValue (true | false) >


<!ELEMENT run EMPTY>

<!ATTLIST run

class       CDATA #REQUIRED

incremental (true | false)

enabled     (true | false)

fullBuild   (true | false)

async       (true | false) >


<!ELEMENT markerId EMPTY>

<!ATTLIST markerId

markerIdValue CDATA #IMPLIED>

The markerId element is is used to get a custom problem marker for the custom validator implemented using this extension point This markerId element also needs a corresponding problemMarker extension to be defined bythis validator with the same Id as the makerIdValue for the validator to have its own marker type. Here is an example of the a problemMarker extension defined for a markerIdValue "FooMarker" Without a problemMarker extension defined, the customer validator will use the base Validation Message problemMarker type.



The facet element is deprecated

<!ELEMENT facet EMPTY>

<!ATTLIST facet

facetId CDATA #IMPLIED>

This element is deprecated and enablement is the new recommended approach to filter validators based on facets.



<!ELEMENT enablement (not , and , or , instanceof , test , systemTest , equals , count , with , resolve , adapt , iterate)*>

A generic root element. The element can be used inside an extension point to define its enablement expression. The children of an enablement expression are combined using the and operator.



<!ELEMENT not (not | and | or | instanceof | test | systemTest | equals | count | with | resolve | adapt | iterate)>

This element represent a NOT operation on the result of evaluating it's sub-element expression.



<!ELEMENT and (not , and , or , instanceof , test , systemTest , equals , count , with , resolve , adapt , iterate)*>

This element represent an AND operation on the result of evaluating all it's sub-elements expressions.



<!ELEMENT or (not , and , or , instanceof , test , systemTest , equals , count , with , resolve , adapt , iterate)*>

This element represent an OR operation on the result of evaluating all it's sub-element expressions.



<!ELEMENT instanceof EMPTY>

<!ATTLIST instanceof

value CDATA #REQUIRED>

This element is used to perform an instanceof check of the object in focus. The expression returns EvaluationResult.TRUE if the object's type is a sub type of the type specified by the attribute value. Otherwise EvaluationResult.FALSE is returned.



<!ELEMENT test EMPTY>

<!ATTLIST test

property CDATA #REQUIRED

args     CDATA #IMPLIED

value    CDATA #IMPLIED>

This element is used to evaluate the property state of the object in focus. The set of testable properties can be extended using the propery tester extension point. The test expression returns EvaluationResult.NOT_LOADED if teh property tester doing the actual testing isn't loaded yet.



<!ELEMENT systemTest EMPTY>

<!ATTLIST systemTest

property CDATA #REQUIRED

value    CDATA #REQUIRED>

Tests a system property by calling the System.getProperty method and compares the result with the value specified through the value attribute.



<!ELEMENT equals EMPTY>

<!ATTLIST equals

value CDATA #REQUIRED>

This element is used to perform an equals check of the object in focus. The expression returns EvaluationResult.TRUE if the object is equal to the value provided by the attribute value. Otherwise EvaluationResult.FALSE is returned.



<!ELEMENT count EMPTY>

<!ATTLIST count

value CDATA #REQUIRED>

This element is used to test the number of elements in a collection.



<!ELEMENT with (not , and , or , instanceof , test , systemTest , equals , count , with , resolve , adapt , iterate)*>

<!ATTLIST with

variable CDATA #REQUIRED>

This element changes the object to be inspected for all its child element to the object referneced by the given variable. If the variable can not be resolved then the expression will throw a ExpressionException when evaluating it. The children of a with expression are combined using the and operator.



<!ELEMENT resolve (not , and , or , instanceof , test , systemTest , equals , count , with , resolve , adapt , iterate)*>

<!ATTLIST resolve

variable CDATA #REQUIRED

args     CDATA #IMPLIED>

This element changes the object to be inspected for all its child element to the object referneced by the given variable. If the variable can not be resolved then the expression will throw a ExpressionException when evaluating it. The children of a with expression are combined using the and operator.



<!ELEMENT adapt (not , and , or , instanceof , test , systemTest , equals , count , with , resolve , adapt , iterate)*>

<!ATTLIST adapt

type CDATA #REQUIRED>

This element is used to adapt the object in focus to the type specified by the attribute type. The expression returns not loaded if either the adapter or the type referenced isn't loaded yet. It throws a ExpressionException during evaluation if the type name doesn't exist at all. The children of an adapt expression are combined using the and operator.



<!ELEMENT iterate (not , and , or , instanceof , test , systemTest , equals , count , with , resolve , adapt , iterate)*>

<!ATTLIST iterate

operator (or|and) >

This element is used to iterate over a variable that is of type java.util.Collection. If the object in focus is not of type java.util.Collection then an ExpressionException will be thrown while evaluating the expression.