Field

Description

Field element is used by DataProviders. Allows to define the key and direction of the Expression defined above.

GreenVulcano^® ESB Configuration

The Field Element is used by: ArrayDataProvider, Axis2MessageContextDataProvider, Axis2SAAJSOAPMessageDataProvider, CollectionDataProvider, GVBufferChangeDataProvider, HttpMethodDataProvider, InputStreamDataProvider, JMSBytesMessageDataProvider, JMSMapMessageDataProvider, JMSObjectMessageDataProvider, JMSStreamMessageDataProvider, JMSTextMessageDataProvider, MapDataProvider, ObjectDataProvider, StringDataProvider, XMLEventCollectionDataProvider.

The following table shows the Field element's attributes:

Attribute	Type	Description
key	required	The attribute's value can't be null.
type	fixed	This attribute must assume the value field.
direction	optional	Field direction. INOUT: The expression is evaluated on the object set (usually the current GVBuffer, unless otherwise specified by the attribute 'source-selector') the value returned by the expression, is added to the context with the prefix 'key_' + @key, and set the data provider to be returned in the output. IN : The expression is evaluated on the object set (usually the current GVBuffer, unless otherwise specified by the attribute 'source-selector') the value returned by the expression is added to the context with the prefix 'key_' + @key. OUT : The expression is evaluated directly on the object that is returned by the Data provider. In all cases, two variables are added to the context: Input: object setted, usually the current GVBuffer, which will not be overwritten from attribute 'source-selector'; Output: the object that is returned by the Data provider.

Contains a sub-element Expression.

Expression

The following table shows the Expression element's attributes:

Attribute	Type	Description
type	required	The attribute's admitted values are: ognl xpath regex