com.elegantj.data.comp.computedfield
Class ComputableField

java.lang.Object
  com.elegantj.data.comp.computedfield.ComputableField

All Implemented Interfaces:

Computable

public class ComputableField

extends java.lang.Object

implements Computable

This bean provides the expression executor to parse the expression (arithmetical/database related) and to execute it. It also provides the support to the MethodsClass to get the functionality of the database related activities.

Constructor Summary

ComputableField()
Creates a ComputedField

Method Summary

java.lang.Object	executeExp() Executes the expression
java.util.Vector	getColumnData(int colIndex) Returns the column values of the column at colIndex
java.util.Vector	getColumnData(java.lang.String colName) Returns the column values of the column colName
int	getColumnIndex(java.lang.String colName) Returns the index for the specified column
java.util.Vector	getColumnNames() Returns the column names
int	getCurrentIndex() Returns the current index
int	getCurrentPage() Returns the current vertical page index
int	getCurrentPageAcross() Returns the current horizontal page index
java.util.Vector	getCurrentRecord() Returns the current record
java.util.Vector	getData() Returns the data for computation
java.lang.String	getExpression() Gets the expression string to be executed
java.lang.String[]	getMethods() Returns the valid methods to use in the expression
java.lang.String[]	getOperators() Returns the valid operators to use in the expression
int	getPageAcrossCount() Returns the horizontal page count
int	getPageCount() Returns the vertical page count
void	setColumnNames(java.util.Vector columnNames) Sets the column names
void	setCurrentIndex(int index) Sets the current index
void	setCurrentPage(int n) Sets the current vertical page index
void	setCurrentPageAcross(int n) Sets the current horizontal page index
void	setData(java.util.Vector data) Sets the data for computation
void	setExpression(java.lang.String exp) Sets the expression string to be executed
void	setPageAcrossCount(int n) Sets the horizontal page count
void	setPageCount(int n) Sets the vertical page count
boolean	verifyExp() Checks the expression whether it is valid or not

Methods inherited from class java.lang.Object

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

Constructor Detail

ComputableField

public ComputableField()

Creates a ComputedField

Method Detail

setExpression

public void setExpression(java.lang.String exp)

Sets the expression string to be executed

Specified by:

setExpression in interface Computable

Parameters:

exp - the expression string

getExpression

public java.lang.String getExpression()

Gets the expression string to be executed

Specified by:

getExpression in interface Computable

Returns:

the expression string

verifyExp

public boolean verifyExp()

Checks the expression whether it is valid or not

Specified by:

verifyExp in interface Computable

Returns:

true, if an expression is valid, otherwise false

executeExp

public java.lang.Object executeExp()

Executes the expression

Specified by:

executeExp in interface Computable

Returns:

the result of the expression

setData

public void setData(java.util.Vector data)

Sets the data for computation

Specified by:

setData in interface Computable

Parameters:

data - the vector contains the data

getData

public java.util.Vector getData()

Returns the data for computation

Specified by:

getData in interface Computable

Returns:

the vector contains the data

setColumnNames

public void setColumnNames(java.util.Vector columnNames)

Sets the column names

Specified by:

setColumnNames in interface Computable

Parameters:

columnNames - the vector contains the column names

getColumnNames

public java.util.Vector getColumnNames()

Returns the column names

Specified by:

getColumnNames in interface Computable

Returns:

the vector contains the column names

setCurrentIndex

public void setCurrentIndex(int index)

Sets the current index

Specified by:

setCurrentIndex in interface Computable

Parameters:

index - the index of the record ,being proccessed

getCurrentIndex

public int getCurrentIndex()

Returns the current index

Specified by:

getCurrentIndex in interface Computable

Returns:

the index of the record ,being proccessed

getCurrentRecord

public java.util.Vector getCurrentRecord()

Returns the current record

Specified by:

getCurrentRecord in interface Computable

Returns:

the vector containing the current record values

getColumnData

public java.util.Vector getColumnData(java.lang.String colName)

Returns the column values of the column colName

Specified by:

getColumnData in interface Computable

Parameters:

colName - the column name

Returns:

the vector of the column values

getColumnIndex

public int getColumnIndex(java.lang.String colName)

Returns the index for the specified column

Parameters:

colName - the name of the column

Returns:

the index for the specified column

getColumnData

public java.util.Vector getColumnData(int colIndex)

Returns the column values of the column at colIndex

Specified by:

getColumnData in interface Computable

Parameters:

colIndex - the column index

Returns:

the vector of the column values

setCurrentPage

public void setCurrentPage(int n)

Sets the current vertical page index

Specified by:

setCurrentPage in interface Computable

Parameters:

n - the current vertical page index

getCurrentPage

public int getCurrentPage()

Returns the current vertical page index

Specified by:

getCurrentPage in interface Computable

Returns:

the current vertical page index

setPageCount

public void setPageCount(int n)

Sets the vertical page count

Specified by:

setPageCount in interface Computable

Parameters:

n - the vertical page count

getPageCount

public int getPageCount()

Returns the vertical page count

Specified by:

getPageCount in interface Computable

Returns:

the vertical page count

setCurrentPageAcross

public void setCurrentPageAcross(int n)

Sets the current horizontal page index

Specified by:

setCurrentPageAcross in interface Computable

Parameters:

n - the current horizontal page index

getCurrentPageAcross

public int getCurrentPageAcross()

Returns the current horizontal page index

Specified by:

getCurrentPageAcross in interface Computable

Returns:

the current horizontal page index

setPageAcrossCount

public void setPageAcrossCount(int n)

Sets the horizontal page count

Specified by:

setPageAcrossCount in interface Computable

Parameters:

n - the horizontal page count

getPageAcrossCount

public int getPageAcrossCount()

Returns the horizontal page count

Specified by:

getPageAcrossCount in interface Computable

Returns:

the horizontal page count

getOperators

public java.lang.String[] getOperators()

Returns the valid operators to use in the expression

Specified by:

getOperators in interface Computable

Returns:

the array of the operators

getMethods

public java.lang.String[] getMethods()

Returns the valid methods to use in the expression

Specified by:

getMethods in interface Computable

Returns:

the array of the method names