edu.udo.cs.yale.example
Class DataRowFactory

java.lang.Object
  edu.udo.cs.yale.example.DataRowFactory

public class DataRowFactory
extends java.lang.Object

Factory class for DataRow objects. One factory should be used for one ExampleTable only. This class is necessary to customize implementations of DataRowReader to create DataRows of arbitrary type.

Version:

$Id: DataRowFactory.java,v 2.14 2006/08/11 09:03:51 ingomierswa Exp $

Author:

Ingo Mierswa, Simon Fischer

Field Summary

static int	FIRST_TYPE_INDEX
static int	LAST_TYPE_INDEX
private int	type The type can be one out of TYPE_DOUBLE_ARRAY, TYPE_FLOAT_ARRAY, TYPE_BYTE_ARRAY, TYPE_BOOLEAN_ARRAY, TYPE_DOUBLE_SPARSE_ARRAY, TYPE_FLOAT_SPARSE_ARRAY, or TYPE_SPARSE_MAP.
static int	TYPE_BOOLEAN_ARRAY
static int	TYPE_BYTE_ARRAY
static int	TYPE_DOUBLE_ARRAY
static int	TYPE_DOUBLE_SPARSE_ARRAY
static int	TYPE_FLOAT_ARRAY
static int	TYPE_FLOAT_SPARSE_ARRAY
static java.lang.String[]	TYPE_NAMES
static int	TYPE_SPARSE_MAP

Constructor Summary

DataRowFactory(int type)

Method Summary

DataRow	create(int size) Creates a new DataRow with the given initial capacity.
DataRow	create(java.lang.Object[] data, Attribute[] attributes) Creates a data row from an Object array.
DataRow	create(java.lang.String[] strings, Attribute[] attributes) Creates a data row from an array of Strings.
int	getType() Returns the type of the created data rows.
static double	string2Double(java.lang.String str)

Methods inherited from class java.lang.Object

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

Field Detail

TYPE_NAMES

public static final java.lang.String[] TYPE_NAMES

FIRST_TYPE_INDEX

public static final int FIRST_TYPE_INDEX

See Also:

Constant Field Values

TYPE_DOUBLE_ARRAY

public static final int TYPE_DOUBLE_ARRAY

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Constant Field Values

TYPE_FLOAT_ARRAY

public static final int TYPE_FLOAT_ARRAY

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Constant Field Values

TYPE_BYTE_ARRAY

public static final int TYPE_BYTE_ARRAY

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Constant Field Values

TYPE_BOOLEAN_ARRAY

public static final int TYPE_BOOLEAN_ARRAY

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Constant Field Values

TYPE_DOUBLE_SPARSE_ARRAY

public static final int TYPE_DOUBLE_SPARSE_ARRAY

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Constant Field Values

TYPE_FLOAT_SPARSE_ARRAY

public static final int TYPE_FLOAT_SPARSE_ARRAY

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Constant Field Values

TYPE_SPARSE_MAP

public static final int TYPE_SPARSE_MAP

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Constant Field Values

LAST_TYPE_INDEX

public static final int LAST_TYPE_INDEX

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Constant Field Values

type

private int type

The type can be one out of TYPE_DOUBLE_ARRAY, TYPE_FLOAT_ARRAY, TYPE_BYTE_ARRAY, TYPE_BOOLEAN_ARRAY, TYPE_DOUBLE_SPARSE_ARRAY, TYPE_FLOAT_SPARSE_ARRAY, or TYPE_SPARSE_MAP.

Constructor Detail

DataRowFactory

public DataRowFactory(int type)

Parameters:

type - must be one out of TYPE_DOUBLE_ARRAY, TYPE_SPARSE_MAP, or TYPE_SPARSE_ARRAY.

Method Detail

create

public DataRow create(int size)

Creates a new DataRow with the given initial capacity.

create

public DataRow create(java.lang.String[] strings,
                      Attribute[] attributes)

Creates a data row from an array of Strings. If the corresponding attribute is nominal, the string is mapped to its index, otherwise it is parsed using Double.parseDouble(String) .

See Also:

FileDataRowReader

create

public DataRow create(java.lang.Object[] data,
                      Attribute[] attributes)

Creates a data row from an Object array. The classes of the object must match the value type of the corresponding Attribute. If the corresponding attribute is nominal, data[i] will be cast to String. If it is numerical, it will be cast to Number.

Throws:

java.lang.ClassCastException - if data class does not match attribute type

See Also:

DatabaseDataRowReader

getType

public int getType()

Returns the type of the created data rows.

string2Double

public static final double string2Double(java.lang.String str)