prajna.viz.prefuse

Class SemanticTupleLoader

java.lang.Object

prajna.viz.prefuse.TupleLoader<DataRecord>

prajna.viz.prefuse.SemanticTupleLoader

public class SemanticTupleLoader
extends TupleLoader<DataRecord>

Implementation of a TupleLoader which handles loading from a DataRecord element. When a tuple is loaded, all available non-null fields from the DataRecord are added to the Tuple. Most fields are saved as Strings. Date fields are stored as Dates, Int fields are stored as integers, and Measure fields are stored as doubles and Strings, storing the value as a double and the units as a String

Author:

Edward Swing

Constructor Summary

Constructors

Constructor and Description
SemanticTupleLoader()

Method Summary

Methods

Modifier and Type	Method and Description
protected boolean	dataMatches(DataRecord data, prefuse.data.Tuple tuple) Determine whether the given data and tuple represent the same data.
DataRecord	getData(prefuse.data.Tuple tuple) Get the original data element which matches the provided tuple.
void	loadData(DataRecord rec, prefuse.data.Tuple tuple) Load data from the DataRecord into the tuple.

Methods inherited from class prajna.viz.prefuse.TupleLoader

addData, findTuple, getLabelField, getTable, setLabelField, setTable

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SemanticTupleLoader

public SemanticTupleLoader()

Method Detail

dataMatches

protected boolean dataMatches(DataRecord data,
                  prefuse.data.Tuple tuple)

Determine whether the given data and tuple represent the same data. This method checks the original data column for strict object equality.

Specified by:

dataMatches in class TupleLoader<DataRecord>

Parameters:

data - the data element

tuple - the tuple

Returns:

true if they represent the same data, false otherwise.

getData

public DataRecord getData(prefuse.data.Tuple tuple)

Get the original data element which matches the provided tuple. This method queries the tuple for the object stored in the original data column.

Specified by:

getData in class TupleLoader<DataRecord>

Parameters:

tuple - the Tuple to match

Returns:

the original data element

loadData

public void loadData(DataRecord rec,
            prefuse.data.Tuple tuple)

Load data from the DataRecord into the tuple. The schema of the specified table is updated to make sure the tuple fields are able to be loaded into the table. All available fields from the DataRecord are added to the relevant tuple columns, adding to the schema as needed. The original DataRecord is also stored in a column within the table.

Specified by:

loadData in class TupleLoader<DataRecord>

Parameters:

rec - the data element

tuple - the tuple to load