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Class weka.experiment.DatabaseResultListener
java.lang.Object
|
+----weka.experiment.DatabaseUtils
|
+----weka.experiment.DatabaseResultListener
- public class DatabaseResultListener
- extends DatabaseUtils
- implements ResultListener
DatabaseResultListener takes the results from a ResultProducer
and submits them to a central database.
- Version:
- $Revision: 1.7 $
- Author:
- Len Trigg (trigg@cs.waikato.ac.nz)
DatabaseResultListener()
- Sets up the database drivers
acceptResult(ResultProducer, Object[], Object[])
- Submit the result to the appropriate table of the database
cacheKeyNameTipText()
- Returns the tip text for this property
determineColumnConstraints(ResultProducer)
- Determines if there are any constraints (imposed by the
destination) on any additional measures produced by
resultProducers.
getCacheKeyName()
- Get the value of CacheKeyName.
globalInfo()
- Returns a string describing this result listener
isResultRequired(ResultProducer, Object[])
- Always says a result is required.
postProcess(ResultProducer)
- Perform any postprocessing.
preProcess(ResultProducer)
- Prepare for the results to be received.
setCacheKeyName(String)
- Set the value of CacheKeyName.
DatabaseResultListener
public DatabaseResultListener() throws java.lang.Exception
Sets up the database drivers
- Throws:
- java.lang.Exception - if an error occurs
globalInfo
public java.lang.String globalInfo()
Returns a string describing this result listener
- Returns:
- a description of the result listener suitable for
displaying in the explorer/experimenter gui
preProcess
public void preProcess(ResultProducer rp) throws java.lang.Exception
Prepare for the results to be received.
- Parameters:
rp
- the ResultProducer that will generate the results
- Throws:
- java.lang.Exception - if an error occurs during preprocessing.
postProcess
public void postProcess(ResultProducer rp) throws java.lang.Exception
Perform any postprocessing. When this method is called, it indicates
that no more results will be sent that need to be grouped together
in any way.
- Parameters:
rp
- the ResultProducer that generated the results
- Throws:
- java.lang.Exception - if an error occurs
determineColumnConstraints
public java.lang.String[] determineColumnConstraints(ResultProducer rp) throws java.lang.Exception
Determines if there are any constraints (imposed by the
destination) on any additional measures produced by
resultProducers. Null should be returned if there are NO
constraints, otherwise a list of column names should be
returned as an array of Strings. In the case of
DatabaseResultListener, the structure of an existing database
will impose constraints.
- Parameters:
rp
- the ResultProducer to which the constraints will apply
- Returns:
- an array of column names to which resutltProducer's
results will be restricted.
- Throws:
- java.lang.Exception - if an error occurs.
acceptResult
public void acceptResult(ResultProducer rp,
java.lang.Object key[],
java.lang.Object result[]) throws java.lang.Exception
Submit the result to the appropriate table of the database
- Parameters:
rp
- the ResultProducer that generated the result
key
- The key for the results.
result
- The actual results.
- Throws:
- java.lang.Exception - if the result couldn't be sent to the database
isResultRequired
public boolean isResultRequired(ResultProducer rp,
java.lang.Object key[]) throws java.lang.Exception
Always says a result is required. If this is the first call,
prints out the header for the Database output.
- Parameters:
rp
- the ResultProducer wanting to generate the result
key
- The key for which a result may be needed.
- Returns:
- true if the result should be calculated.
- Throws:
- java.lang.Exception - if the database couldn't be queried
cacheKeyNameTipText
public java.lang.String cacheKeyNameTipText()
Returns the tip text for this property
- Returns:
- tip text for this property suitable for
displaying in the explorer/experimenter gui
getCacheKeyName
public java.lang.String getCacheKeyName()
Get the value of CacheKeyName.
- Returns:
- Value of CacheKeyName.
setCacheKeyName
public void setCacheKeyName(java.lang.String newCacheKeyName)
Set the value of CacheKeyName.
- Parameters:
newCacheKeyName
- Value to assign to CacheKeyName.
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