org.apache.taglibs.standard.tag.common.core

Class SetSupport

java.lang.Object

javax.servlet.jsp.tagext.TagSupport

javax.servlet.jsp.tagext.BodyTagSupport

org.apache.taglibs.standard.tag.common.core.SetSupport

All Implemented Interfaces:

Serializable, BodyTag, IterationTag, JspTag, Tag

Direct Known Subclasses:

SetTag, SetTag

public abstract class SetSupport
extends BodyTagSupport

Support for handlers of the <set> tag.

Author:

Shawn Bayern

See Also:

Serialized Form

Field Summary

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

bodyContent

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

id, pageContext

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

EVAL_BODY_BUFFERED, EVAL_BODY_TAG

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

Constructors

Modifier	Constructor and Description
protected	SetSupport() Constructs a new handler.

Method Summary

Modifier and Type	Method and Description
int	doEndTag() Default processing of the end tag returning EVAL_PAGE.
protected abstract String	evalProperty() Evaluate the property attribute.
protected abstract Object	evalTarget() Evaluate the target attribute.
protected abstract Object	evalValue() Evaluate the value attribute.
protected ExpressionFactory	getExpressionFactory()
protected abstract boolean	isValueSpecified() Indicates that the value attribute was specified.
void	release() Release state.
void	setScope(String scope) Scope for var.
void	setVar(String var) Name of the exported scoped variable to hold the value specified in the action.

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

doAfterBody, doInitBody, doStartTag, getBodyContent, getPreviousOut, setBodyContent

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

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

Methods inherited from class java.lang.Object

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

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

getParent, setPageContext, setParent

Constructor Detail

SetSupport

protected SetSupport()

Constructs a new handler. As with TagSupport, subclasses should not provide other constructors and are expected to call the superclass constructor.

Method Detail

release

public void release()

Description copied from class: BodyTagSupport

Release state.

Specified by:

release in interface Tag

Overrides:

release in class BodyTagSupport

See Also:

Tag.release()

doEndTag

public int doEndTag()
             throws JspException

Description copied from class: BodyTagSupport

Default processing of the end tag returning EVAL_PAGE.

Specified by:

doEndTag in interface Tag

Overrides:

doEndTag in class BodyTagSupport

Returns:

EVAL_PAGE

Throws:

JspException - if an error occurred while processing this tag

See Also:

Tag.doEndTag()

isValueSpecified

protected abstract boolean isValueSpecified()

Indicates that the value attribute was specified. If no value attribute is supplied then the value is taken from the tag's body content.

Returns:

true if the value attribute was specified

evalValue

protected abstract Object evalValue()
                             throws JspException

Evaluate the value attribute.

Returns:

the result of evaluating the value attribute

Throws:

JspException - if there was a problem evaluating the expression

evalTarget

protected abstract Object evalTarget()
                              throws JspException

Evaluate the target attribute.

Returns:

the result of evaluating the target attribute

Throws:

JspException - if there was a problem evaluating the expression

evalProperty

protected abstract String evalProperty()
                                throws JspException

Evaluate the property attribute.

Returns:

the result of evaluating the property attribute

Throws:

JspException - if there was a problem evaluating the expression

getExpressionFactory

protected ExpressionFactory getExpressionFactory()

setVar

public void setVar(String var)

Name of the exported scoped variable to hold the value specified in the action. The type of the scoped variable is whatever type the value expression evaluates to.

Parameters:

var - name of the exported scoped variable

setScope

public void setScope(String scope)

Scope for var. Values are verified by TLV.

Parameters:

scope - the variable scope