# ScriptExpressionEvaluatorType (Complex Type)

### Namespace: http://midpoint.evolveum.com/xml/ns/public/common/common-3

Supertype: ScriptExpressionEvaluatorConfigurationType
Generic script expression. The purpose of the expression is to return a value. The expression must produce something that is a piece of XML, which means that it may produce either string value, XML node or a list of XML nodes. The expression may use variables or arguments. However, such variables or arguments passed to the expression will be different for each invocation. It should be documented in each case this type is used.

Item Summary
Name | Type | Multiplicity | Description
--- | --- | --- | ---
description | property string | [0,1] | Free-form textual description of the object.
documentation | property string | [0,1] | Technical documentation for a particular object or construct.
trace | property boolean | [0,1] | Explicitly trace the execution of this expression.
relativityMode | property TransformExpressionRelativityModeType | [0,1] | Relativity mode of an expression, whether expression is processed in relative or absolute more.
includeNullInputs | property boolean | [0,1] | If set to true the script will be evaluated with null value as argument when the input is changed from or to an empty value.
condition | property ExpressionType | [0,1] | Condition driving whether this expression is evaluated at all (for given inputs).
language | property anyURI | [0,1] | Language of the expression.
returnType | property ScriptExpressionReturnTypeType | [0,1] | The type of the expression result, either "list" or "scalar".
objectVariableMode | property ObjectVariableModeType | [0,1] | Specifies how reference variables should be provided for the script.
valueVariableMode | property ValueVariableModeType | [0,1] | Type of variables that appear in the script.
code | property string | [1,1] | Script code in the native format of the scripting language.

- ### Items

  - #### description

    Flags: RAM,runtime

    Multiplicity: [0,1]

    Display order:

    Free-form textual description of the object. It is supposed to describe the object or a construct that it is attached to.

    This information may be presented to midPoint users, even to ordinary end users. For example role description may be presented to users when they are selecting roles to request. Therefore the description should be written in a language that the users can understand.

    Description is assumed to be a plan, non-formatted text. Amount of white space is considered insignificant. E.g. leading and trailing white space may be skipped, multiple spaces can be collapsed to one and so on.

  - #### documentation

    Flags: RAM,runtime

    Multiplicity: [0,1]

    Display order:

    Technical documentation for a particular object or construct.

    The purpose of this element is to document system configuration and behavior. The documentation will not be presented to end users. In fact, it will probably not be presented at all in midPoint user interface. This documentation element is supposed to be a part of the technical documentation of midPoint deployment. The tools than generate deployment configuration will look for these elements and combine them to compiled documentation document.

    AsciiDoc formatting is assumed for this element. Any leading or trailing whitespace is skipped. Indentation equivalent to he indentation of the first non-blank line of text is also skipped.

  - #### trace

    Flags: RAM,runtime

    Multiplicity: [0,1]

    Display order:

    Explicitly trace the execution of this expression. The execution will be logged on INFO level if this property is set to true to make sure that it will be visible in the logs.

  - #### relativityMode

    Flags: RAM,runtime,AVals:2

    Multiplicity: [0,1]

    Display order:

    Relativity mode of an expression, whether expression is processed in relative or absolute more. In relative mode the inputs are provided to the expression one-by-one. In absolute mode all inputs are provided to the expression at the same time.

  - #### includeNullInputs

    Flags: RAM,runtime

    Multiplicity: [0,1]

    Display order:

    If set to true the script will be evaluated with null value as argument when the input is changed from or to an empty value. This generally works well for most cases. It may be set to false as an optimization. Note: default setting (true) for this property may be overridden in specific expression evaluators.

  - #### condition

    Flags: RAM,runtime

    Multiplicity: [0,1]

    Display order:

    Condition driving whether this expression is evaluated at all (for given inputs).

  - #### language

    Flags: RAM,runtime

    Multiplicity: [0,1]

    Display order:

    Language of the expression. Groovy is the default language if other language is not specified.

  - #### returnType

    Flags: RAM,runtime,AVals:2

    Multiplicity: [0,1]

    Display order:

    The type of the expression result, either "list" or "scalar". If not set it will be determined automatically from the target data type for the expression. This setting should be used only if the automatic mechanism does not work as expected.

  - #### objectVariableMode

    Flags: RAM,runtime,AVals:2

    Multiplicity: [0,1]

    Display order:

    Specifies how reference variables should be provided for the script. By default, they are resolved to objects.

  - #### valueVariableMode

    Flags: RAM,runtime,AVals:2

    Multiplicity: [0,1]

    Display order:

    Type of variables that appear in the script.

  - #### code

    Flags: RAM,runtime

    Multiplicity: [1,1]

    Display order:

    Script code in the native format of the scripting language.