javax.servlet.jsp.jstl.core

Class LoopTagSupport

java.lang.Object

javax.servlet.jsp.tagext.TagSupport

javax.servlet.jsp.jstl.core.LoopTagSupport

All Implemented Interfaces:

java.io.Serializable, LoopTag, IterationTag, JspTag, Tag, TryCatchFinally

Direct Known Subclasses:

CoreForEachTag, CoreForTokensTag

public abstract class LoopTagSupport
extends TagSupport
implements IterationTag, TryCatchFinally, LoopTag

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected int	begin
protected boolean	beginSpecified
protected ValueExpression	deferredExpression
protected int	end
protected boolean	endSpecified
protected java.lang.String	itemId
protected java.lang.String	statusId
protected int	step
protected boolean	stepSpecified

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

Constructors

Constructor and Description
LoopTagSupport()

Method Summary

Modifier and Type	Method and Description
int	doAfterBody() Processed to check if the tag should loop.
void	doCatch(java.lang.Throwable t) Invoked if any exception is thrown while evaluating the tag.
void	doFinally() Invoked after doEndTag even with an exception.
int	doStartTag() Starts the iteration.
java.lang.Object	getCurrent() Returns the current object.
protected java.lang.String	getDelims()
LoopTagStatus	getLoopStatus() Returns the loop status.
protected abstract boolean	hasNext() Returns true if there are more values in the tag.
protected abstract java.lang.Object	next() Returns the next object for the tag.
protected abstract void	prepare() Called before iteration starts
void	setVar(java.lang.String id) Sets the var attribute.
void	setVarStatus(java.lang.String id) Sets the var status attribute.
protected void	validateBegin() Checks that the begin property makes sense.
protected void	validateEnd() Checks that the end property makes sense.
protected void	validateStep() Checks that the step property makes sense.

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

doEndTag, 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, toString, wait, wait, wait

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

doEndTag, getParent, release, setPageContext, setParent

Field Detail

begin

protected int begin

beginSpecified

protected boolean beginSpecified

deferredExpression

protected ValueExpression deferredExpression

end

protected int end

endSpecified

protected boolean endSpecified

step

protected int step

stepSpecified

protected boolean stepSpecified

itemId

protected java.lang.String itemId

statusId

protected java.lang.String statusId

Constructor Detail

LoopTagSupport

public LoopTagSupport()

Method Detail

setVar

public void setVar(java.lang.String id)

Sets the var attribute.

setVarStatus

public void setVarStatus(java.lang.String id)

Sets the var status attribute.

validateBegin

protected void validateBegin()
                      throws JspTagException

Checks that the begin property makes sense.

Throws:

JspTagException

validateEnd

protected void validateEnd()
                    throws JspTagException

Checks that the end property makes sense.

Throws:

JspTagException

validateStep

protected void validateStep()
                     throws JspTagException

Checks that the step property makes sense.

Throws:

JspTagException

prepare

protected abstract void prepare()
                         throws JspTagException

Called before iteration starts

Throws:

JspTagException

next

protected abstract java.lang.Object next()
                                  throws JspTagException

Returns the next object for the tag.

Throws:

JspTagException

hasNext

protected abstract boolean hasNext()
                            throws JspTagException

Returns true if there are more values in the tag.

Throws:

JspTagException

getCurrent

public java.lang.Object getCurrent()

Returns the current object.

Specified by:

getCurrent in interface LoopTag

getLoopStatus

public LoopTagStatus getLoopStatus()

Returns the loop status.

Specified by:

getLoopStatus in interface LoopTag

doStartTag

public int doStartTag()
               throws JspException

Starts the iteration.

Specified by:

doStartTag in interface Tag

Overrides:

doStartTag in class TagSupport

Returns:

SKIP_BODY to ignore the body and EVAL_BODY_INCLUDE to evaluate the body.

Throws:

JspException

doAfterBody

public int doAfterBody()
                throws JspException

Description copied from class: TagSupport

Processed to check if the tag should loop. The default behavior returns SKIP_BODY so it does not loop.

Specified by:

doAfterBody in interface IterationTag

Overrides:

doAfterBody in class TagSupport

Returns:

EVAL_BODY_AGAIN to repeat the body or SKIP_BODY to stop.

Throws:

JspException

doCatch

public void doCatch(java.lang.Throwable t)
             throws java.lang.Throwable

Description copied from interface: TryCatchFinally

Invoked if any exception is thrown while evaluating the tag.

Specified by:

doCatch in interface TryCatchFinally

Parameters:

t - the thrown exception

Throws:

java.lang.Throwable

doFinally

public void doFinally()

Description copied from interface: TryCatchFinally

Invoked after doEndTag even with an exception.

Specified by:

doFinally in interface TryCatchFinally

getDelims

protected java.lang.String getDelims()