org.makumba.list.functions
Class GenericListValueFunction

java.lang.Object
  javax.servlet.jsp.tagext.TagSupport
      org.makumba.analyser.AnalysableElement
          org.makumba.analyser.AnalysableExpression
              org.makumba.list.functions.GenericListValueFunction

All Implemented Interfaces:

Serializable, IterationTag, JspTag, Tag

Direct Known Subclasses:

ValueChangeFunctions, ValueFunction

public abstract class GenericListValueFunction
extends AnalysableExpression

Provides a basic implementation for a EL function that uses a ValueComputer to compute some value from an expression.

Version:

$Id: GenericListValueFunction.java 5117 2010-05-18 17:18:03Z rosso_nero $

Author:

Rudolf Mayer

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.makumba.analyser.AnalysableElement

AnalysableElement.FilePositionElementComparator

Field Summary

Fields inherited from class org.makumba.analyser.AnalysableExpression

elData, expression, key, parent

Fields inherited from class org.makumba.analyser.AnalysableElement

ANALYSIS_STATE

Fields inherited from class javax.servlet.jsp.tagext.TagSupport

id, pageContext

Fields inherited from interface javax.servlet.jsp.tagext.IterationTag

EVAL_BODY_AGAIN

Fields inherited from interface javax.servlet.jsp.tagext.Tag

EVAL_BODY_INCLUDE, EVAL_PAGE, SKIP_BODY, SKIP_PAGE

Constructor Summary

GenericListValueFunction()

Method Summary

protected static MultipleKey	computeKey(String expr, MultipleKey parentListKey) computes the key for this function from the expression and the key of the enclosing mak:list/object
void	doEndAnalyze(PageCache pageCache) Tells the ValueComputer to finish analysis.
protected QueryTag	getEnclosingList() Finds the enclosing mak:list/object
protected static MultipleKey	getRunningListKey(PageContext pageContext) retrieve the key of the current mak:list from the stack of lists
protected static ValueComputer	getValueComputer(String expr, PageContext pageContext, MultipleKey parentListKey) retrieve the value computer for the expression from the pageCache
protected void	registerValueAtParentList(PageCache pageCache, String expr, QueryTag parentList) Registers this function at the parent/enclosing mak:list/object.
void	setKey(PageCache pageCache)

Methods inherited from class org.makumba.analyser.AnalysableExpression

analyze, checkNumberOfArguments, findParentWithClass, getElementData, getKey, getParent, getPrefix, resolve, setELDataAtAnalysis, setParent, treatELExpressionAtAnalysis, treatExpressionAtAnalysis

Methods inherited from class org.makumba.analyser.AnalysableElement

checkTagFound, discardJSPParsingData, getAnalyzedElementData, getCurrentBodyTagData, getElementAfter, getElementBefore, getPageCache, getPageCache, getRunningElementData, getTagByAttribute, getTagById, getThreadElementStack, initializeThread, keepAnalysisState, setAnalyzedElementData, setRunningElementData

Methods inherited from class javax.servlet.jsp.tagext.TagSupport

doAfterBody, doEndTag, doStartTag, findAncestorWithClass, getId, getValue, getValues, release, removeValue, setId, setPageContext, setParent, setValue

Methods inherited from class java.lang.Object

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

Constructor Detail

GenericListValueFunction

public GenericListValueFunction()

Method Detail

registerValueAtParentList

protected void registerValueAtParentList(PageCache pageCache,
                                         String expr,
                                         QueryTag parentList)

Registers this function at the parent/enclosing mak:list/object.

doEndAnalyze

public void doEndAnalyze(PageCache pageCache)

Tells the ValueComputer to finish analysis.

Specified by:

doEndAnalyze in class AnalysableExpression

Parameters:

pageCache - the page cache of the current page

getEnclosingList

protected QueryTag getEnclosingList()

Finds the enclosing mak:list/object

setKey

public void setKey(PageCache pageCache)

Specified by:

setKey in class AnalysableExpression

computeKey

protected static MultipleKey computeKey(String expr,
                                        MultipleKey parentListKey)

computes the key for this function from the expression and the key of the enclosing mak:list/object

getValueComputer

protected static ValueComputer getValueComputer(String expr,
                                                PageContext pageContext,
                                                MultipleKey parentListKey)

retrieve the value computer for the expression from the pageCache

getRunningListKey

protected static MultipleKey getRunningListKey(PageContext pageContext)

retrieve the key of the current mak:list from the stack of lists