Package ca.spatial.table

Class AppendColumnSpec

java.lang.Object

ca.spatial.table.AppendColumnSpec

public class AppendColumnSpec
extends Object

This class holds the specification of a column in an AppendStore. The specification includes the column name, data type, width and number of digits of precision after the decimal point.

In addition, the specification also contains the expressions that will be evaluated on each appended table in order to generate the data for this table.

See Also:

AppendStore, AppendStoreBuilder

Constructor Summary

Constructors

Constructor	Description
AppendColumnSpec(String name, int type, int width, int dec)	Create a column definition.
AppendColumnSpec(String name, String type, int width, int dec)	Create a column definition.

Method Summary

Modifier and Type	Method	Description
AppendColumnSpec	addExpression(int index, String expression)	Add an expression for a specific table.
int	getDec()	Get the number of decimals of precision after the decimal point used for output
String	getExpression(int index)	Get an expression for a given table
ArrayList<String>	getExpressions()	Get the list of expressions to be applied to each input table in order to compute the output values.
String	getName()	Get the name of this column
int	getType()	Get the type of this column.
String	getTypeString()	Get the type string for this column, which may be C, I, N or L (String, Integer, Number, Boolean).
int	getWidth()	Get the width of this column used for output

Methods inherited from class java.lang.Object

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

Constructor Details

AppendColumnSpec

public AppendColumnSpec(String name,
 String type,
 int width,
 int dec)

Create a column definition.

Parameters:

name - the name to be used for the column

type - the data type, which may be C, I, N or L (String, Integer, Number, Boolean)

width - the field width to be used on output

dec - the number of digits of precision after the decimal place, used on output

AppendColumnSpec

public AppendColumnSpec(String name,
 int type,
 int width,
 int dec)

Create a column definition.

Parameters:

name - the name to be used for the column

type - the data type, as taken from the AttributeFormat class. Valid types are INTEGER, NUMBER, BOOLEAN and STRING.

width - the field width to be used on output

dec - the number of digits of precision after the decimal place, used on output

Method Details

getExpressions

public ArrayList<String> getExpressions()

Get the list of expressions to be applied to each input table in order to compute the output values.

addExpression

public AppendColumnSpec addExpression(int index,
 String expression)

Add an expression for a specific table. THe expressions must initially be added in order.

getExpression

public String getExpression(int index)

Get an expression for a given table

getName

public String getName()

Get the name of this column

getType

public int getType()

Get the type of this column. The types are as defined in the AttributeFormat class (INTEGER, NUMBER, STRING, BOOLEAN)

getTypeString

public String getTypeString()

Get the type string for this column, which may be C, I, N or L (String, Integer, Number, Boolean).

getWidth

public int getWidth()

Get the width of this column used for output

getDec

public int getDec()

Get the number of decimals of precision after the decimal point used for output