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12.24. Object Translator
12.24.1. Object Translator
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The Object translator is a bridge for reading Java objects from external sources, such as Map Cache, and delivering them to the engine for processing. To assist in providing that bridge, the OBJECTTABLE function must be used to transform the Java object into rows and columns.
These are the types of object translators:
map-cache- supports a local cache that is of type Map and using Key searching. This translator is implemented by theorg.teiid.translator.object.ObjectExecutionFactoryclass.
Note
See the Red Hat JBoss Data Grid resource adapter for this translator. It can be configured to look up the cache container through JNDI or created sources (such as ConfigurationFileName or RemoteServerList).
12.24.2. Object Translator: Execution Properties
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The following execution properties are relevant to translating from JBoss Data Grid.
|
Name
|
Description
|
Required
|
Default
|
|---|---|---|---|
|
SupportsLuceneSearching
|
Setting to true assumes your objects are annotated and Hibernate/Lucene will be used to search the cache
|
N
|
false
|
12.24.3. Object Translator: Supported Capabilities
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The following are the connector capabilities when Key Searching is used:
- SELECT command
- CompareCriteria - only EQ
- InCriteria
The following are the connector capabilities when Hibernate/Lucene Searching is enabled:
- SELECT command
- CompareCriteria - EQ, NE, LT, GT, etc.
- InCriteria
- OrCriteria
- And/Or Criteria
- Like Criteria
- INSERT, UPDATE, DELETE
12.24.4. Object Translator: Usage
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Retrieve objects from a cache and transform into rows and columns.
- The primary object returned by the cache should have a name in source of 'this'. All other columns will have their name in source (which defaults to the column name) interpreted as the path to the column value from the primary object.
- All columns that are not the primary key nor covered by a lucene index should be marked as SEARCHABLE 'Unsearchable'.
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