org.makumba.list.engine.valuecomputer
Class ValueComputer

java.lang.Object
  org.makumba.list.engine.valuecomputer.ValueComputer

Direct Known Subclasses:

QueryValueComputer

public class ValueComputer
extends Object

Every ValueTag will build a ValueComputer at page analysis, which it then retrieves and uses at page running

Version:

$Id

Author:

Cristian Bogdan

Field Summary

(package private) String	expr The queryProjection expression
(package private) MultipleKey	parentKey The key of the parentList
(package private) int	projectionIndex The queryProjection index in the currentListData
protected FieldDefinition	type The queryProjection type

Constructor Summary

ValueComputer()

ValueComputer(MultipleKey listKey, String expr, PageCache pageCache)
A special ValueComputer made by mak:lists who want to select extra expressions

Method Summary

void	doEndAnalyze(PageCache pageCache) Computes the queryProjection index in the currentListData, and the queryProjection type.
String	getFormattedValue(ValueTag running, PageCache pageCache)
int	getProjectionIndex()
(package private) MultipleKey	getQueryKey() The key of the query in which this value is a projection.
FieldDefinition	getType()
Object	getValue(PageContext pc) Gets the value of from the QueryExecution based on the projectionIndex
static ValueComputer	getValueComputerAtAnalysis(boolean isValue, MultipleKey parentListKey, String expr, PageCache pageCache) Determines if 'analyzed' is a queryMak:value or a nonQueryMak:value
static boolean	isPointer(PageCache pageCache, MultipleKey parentListKey, String expr)
void	print(ValueTag running, PageCache pageCache) Formats the value of the queryProjection from the currentListData of the enclosing query.

Methods inherited from class java.lang.Object

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

Field Detail

parentKey

MultipleKey parentKey

The key of the parentList

projectionIndex

int projectionIndex

The queryProjection index in the currentListData

expr

String expr

The queryProjection expression

type

protected FieldDefinition type

The queryProjection type

Constructor Detail

ValueComputer

ValueComputer()

ValueComputer

ValueComputer(MultipleKey listKey,
              String expr,
              PageCache pageCache)

A special ValueComputer made by mak:lists who want to select extra expressions

Parameters:

listKey - the key of the list

parentListKey - the key of the parent list

expr - the extra expression

pageCache - the page cache

Method Detail

getValueComputerAtAnalysis

public static ValueComputer getValueComputerAtAnalysis(boolean isValue,
                                                       MultipleKey parentListKey,
                                                       String expr,
                                                       PageCache pageCache)

Determines if 'analyzed' is a queryMak:value or a nonQueryMak:value

Parameters:

isValue - whether this value computer is called from a value evaluator (mak:value expr, EL Value)

parentListKey - the key of the parent list

expr - the expression passed in the tag

pageCache - the page cache of the page

getQueryKey

MultipleKey getQueryKey()

The key of the query in which this value is a projection.

Returns:

The key of the parent of the value

doEndAnalyze

public void doEndAnalyze(PageCache pageCache)

Computes the queryProjection index in the currentListData, and the queryProjection type.

Parameters:

pageCache - the page cache

getValue

public Object getValue(PageContext pc)
                throws LogicException

Gets the value of from the QueryExecution based on the projectionIndex

Parameters:

pc - the page context

Returns:

the computed value

Throws:

LogicException

print

public void print(ValueTag running,
                  PageCache pageCache)
           throws JspException,
                  LogicException

Formats the value of the queryProjection from the currentListData of the enclosing query. Sets the var and the printVar values.

Parameters:

running - the tag that is currently running

pageCache - the page cache of the current page

Throws:

JspException

LogicException

getFormattedValue

public String getFormattedValue(ValueTag running,
                                PageCache pageCache)
                         throws JspException,
                                LogicException

Throws:

JspException

LogicException

getType

public FieldDefinition getType()

getProjectionIndex

public int getProjectionIndex()

isPointer

public static boolean isPointer(PageCache pageCache,
                                MultipleKey parentListKey,
                                String expr)