GenericRetriever

Description

The GenericRetriever element allows you to define a helper to use into the XSL transformations.

We define the functions that run SQL select statement and return the first field of the first record.

The statement to be executed can contain metadata resolved at runtime.

GreenVulcano^® ESB configuration

GenericRetriever element is used by RetrieverConfig.

The following table shows its attributes:

Attribute	Type	Description
type	fixed	retriever (unmodifiable)
class	fixed	it.greenvulcano.gvesb.datahandling.utils.GenericRetriever

Might contain the sub-elements:

• Description
• DataRetriever

An example

Define the following GenericRetriever:

    <GenericRetriever class="it.greenvulcano.gvesb.datahandling.utils.GenericRetriever" type="retriever">
        <DataRetriever cacheable="true" method="getCityID"   signature="NAME">
             select ID from CITY
             where NAME=‘@{{NAME}}’
        </DataRetriever>
        <DataRetriever method="getPersonID" signature="NAME,CITY">
             select ID from PERSON
             where NAME=‘@{{NAME}}’
             and ID_CITY=(select ID from CITY where NAME=‘@{{CITY}}’)
        </DataRetriever>
    </GenericRetriever>

to be applied to the transformation:

    <xsl:variable name="name" select="/PersonsData/PersonData/Name"/>
    <xsl:variable name="city" select="/PersonsData/PersonData/City"/>
    <xsl:element name="col">
        <xsl:value-of select="java:it.greenvulcano.gvesb.datahandling.utils.GenericRetriever.getData('getPersonID',concat($name,';',$city))"/>
    </xsl:element>