org.makumba.forms.tags
Class BasicValueTag

java.lang.Object
  javax.servlet.jsp.tagext.TagSupport
      org.makumba.analyser.AnalysableElement
          org.makumba.analyser.AnalysableTag
              org.makumba.commons.tags.GenericMakumbaTag
                  org.makumba.forms.tags.BasicValueTag

All Implemented Interfaces:

Serializable, IterationTag, JspTag, Tag

Direct Known Subclasses:

InputTag, OptionTag

public abstract class BasicValueTag
extends GenericMakumbaTag

This is a a base class for InputTag and OptionTag but may be used for other tags that need to compute a value in similar manner (value="$attribute" or value="OQL expr").

Version:

$Id: BasicValueTag.java 1529 2007-09-13 23:33:10Z rosso_nero $

Author:

Cristian Bogdan, Manuel Gay

See Also:

Serialized Form

Nested Class Summary

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

AnalysableElement.FilePositionElementComparator

Field Summary

(package private) String	dataType
protected DataDefinitionProvider	ddp
String	expr
protected FormDataProvider	fdp
(package private) String	valueExprOriginal

Fields inherited from class org.makumba.commons.tags.GenericMakumbaTag

extraFormatting, extraFormattingParams, NEEDED_RESOURCES, params

Fields inherited from class org.makumba.analyser.AnalysableTag

ATTRIBUTE_VALUES_TRUE_FALSE, tagData, tagKey, TYPES

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

BasicValueTag()

Method Summary

String	checkPtrExpr(String expr2, PageCache pageCache)
(package private) abstract int	computedValue(Object o, FieldDefinition type) A value was computed, do what's needed with it, cleanup and return the result of doMakumbaEndTag()
protected void	doAnalyzedCleanup() Called by doEndTag in its finally block.
int	doAnalyzedEndTag(PageCache pageCache) makumba-specific endTag
void	doEndAnalyze(PageCache pageCache) Tells the ValueComputer to finish analysis, and sets the types for var and printVar.
void	doStartAnalyze(PageCache pageCache) Determines the ValueComputer and associates it with the tagKey
FormTagBase	getForm()
(package private) abstract FieldDefinition	getTypeFromContext(PageCache pageCache)
protected boolean	isAttribute() Indicates if the given expression is an attribute
boolean	isNull() Indicates if the expression is null
(package private) boolean	isValue()
protected boolean	isValue(String exprexpression) Indicates if the given expression is a value
void	setValue(String value)

Methods inherited from class org.makumba.commons.tags.GenericMakumbaTag

doStartTag, getParams, initialiseState, isAttribute, setAddTitle, setCols, setDefault, setElementSeparator, setEllipsis, setEllipsisLength, setEmpty, setFormat, setHtml, setLabelSeparator, setLineSeparator, setLongLineLength, setMaxlength, setMaxLength, setOnClick, setOnDblClick, setOnKeyDown, setOnKeyPress, setOnKeyUp, setOnMouseDown, setOnMouseMove, setOnMouseOut, setOnMouseOver, setOnMouseUp, setRows, setSize, setStyle, setStyleClass, setStyleId, setTitle, setType, setType, setUrlEncode, toString

Methods inherited from class org.makumba.analyser.AnalysableTag

addTagText, allowsIdenticalKey, canHaveBody, checkAttributeValues, doAnalyzedStartTag, doEndTag, getElementData, getPageContext, getPageTextInfo, getTagKey, getTagText, needPageCache, notEmpty, onlyInt, registerAttributeValues, registerPossibleAttributeValues, setTagDataAtAnalysis, setTagKey

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, findAncestorWithClass, getId, getParent, getValue, getValues, release, removeValue, setId, setPageContext, setParent, setValue

Methods inherited from class java.lang.Object

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

Field Detail

ddp

protected DataDefinitionProvider ddp

valueExprOriginal

String valueExprOriginal

dataType

String dataType

expr

public String expr

fdp

protected FormDataProvider fdp

Constructor Detail

BasicValueTag

public BasicValueTag()

Method Detail

setValue

public void setValue(String value)

getForm

public FormTagBase getForm()

isNull

public boolean isNull()

Indicates if the expression is null

Returns:

true if the expression is null, false otherwise

isValue

boolean isValue()

isValue

protected boolean isValue(String exprexpression)

Indicates if the given expression is a value

Returns:

true if the expression doesn't start with '$' and is not null, false otherwise

isAttribute

protected boolean isAttribute()

Indicates if the given expression is an attribute

Returns:

true if the expression starts with '$', false otherwise

doStartAnalyze

public void doStartAnalyze(PageCache pageCache)

Determines the ValueComputer and associates it with the tagKey

Overrides:

doStartAnalyze in class AnalysableTag

Parameters:

pageCache - the page cache of the current page

checkPtrExpr

public String checkPtrExpr(String expr2,
                           PageCache pageCache)

getTypeFromContext

abstract FieldDefinition getTypeFromContext(PageCache pageCache)

doEndAnalyze

public void doEndAnalyze(PageCache pageCache)

Tells the ValueComputer to finish analysis, and sets the types for var and printVar.

Overrides:

doEndAnalyze in class AnalysableTag

Parameters:

pageCache - the page cache of the current page

doAnalyzedEndTag

public int doAnalyzedEndTag(PageCache pageCache)
                     throws JspException,
                            LogicException

Description copied from class: AnalysableTag

makumba-specific endTag

Overrides:

doAnalyzedEndTag in class AnalysableTag

Parameters:

pageCache - The page cache for the current page

Throws:

JspException

LogicException

See Also:

AnalysableTag.doEndTag()

computedValue

abstract int computedValue(Object o,
                           FieldDefinition type)
                    throws JspException,
                           LogicException

A value was computed, do what's needed with it, cleanup and return the result of doMakumbaEndTag()

Parameters:

o - the value

type - the type of the data

Throws:

JspException

LogicException

doAnalyzedCleanup

protected void doAnalyzedCleanup()

Description copied from class: AnalysableTag

Called by doEndTag in its finally block. Use it to clean references that will not be used next time the servlet container uses the tag object.

Overrides:

doAnalyzedCleanup in class GenericMakumbaTag