Field

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Revision as of 15:48, 2 March 2012 by Anonymous (talk) (Description)
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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