com.rapidminer.example.table
Class LimitCachedDatabaseExampleTable

java.lang.Object
  com.rapidminer.example.table.AbstractExampleTable
      com.rapidminer.example.table.LimitCachedDatabaseExampleTable

All Implemented Interfaces:

ExampleTable, java.io.Serializable

public class LimitCachedDatabaseExampleTable
extends AbstractExampleTable

This class is another data supplier for example sets. For performance reasons one should use a MemoryExampleTable if the data is small enough for the main memory.

Author:

Ingo Mierswa, Simon Fischer

See Also:

Serialized Form

Constructor Summary

LimitCachedDatabaseExampleTable(DatabaseHandler databaseHandler, java.lang.String tableName, int dataManagementType)

Method Summary

DataRow	getDataRow(int index) Returns the i-th data row.
DataRowReader	getDataRowReader() Returns an Iterator for example data given as DataRow objects.
int	size() Returns the number of examples.

Methods inherited from class com.rapidminer.example.table.AbstractExampleTable

addAttribute, addAttributes, createExampleSet, createExampleSet, createExampleSet, createExampleSet, createExampleSet, createExampleSet, findAttribute, getAttribute, getAttributeCount, getAttributes, getNumberOfAttributes, removeAttribute, removeAttribute, toDataString, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

LimitCachedDatabaseExampleTable

public LimitCachedDatabaseExampleTable(DatabaseHandler databaseHandler,
                                       java.lang.String tableName,
                                       int dataManagementType)
                                throws java.sql.SQLException

Throws:

java.sql.SQLException

Method Detail

getDataRow

public DataRow getDataRow(int index)

Description copied from interface: ExampleTable

Returns the i-th data row. Calling methods cannot rely on the efficiency of this method. Memory based example tables should return the data row in O(1).

getDataRowReader

public DataRowReader getDataRowReader()

Description copied from interface: ExampleTable

Returns an Iterator for example data given as DataRow objects. This should be used in all cases where iteration is desired. Since ExampleTable.getDataRow(int) does not ensure to work in an efficient way the usage of this method is preferred (instead using for-loops).

size

public int size()

Description copied from interface: ExampleTable

Returns the number of examples.