public class CatchTag extends TagSupport implements TryCatchFinally
Tag handler for <catch> in JSTL 1.0.
<catch> simply catches any Throwables that occur in its body and optionally exposes them.
id, pageContext
EVAL_BODY_AGAIN
EVAL_BODY_INCLUDE, EVAL_PAGE, SKIP_BODY, SKIP_PAGE
Constructor and Description |
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CatchTag() |
Modifier and Type | Method and Description |
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void |
doCatch(Throwable t)
Invoked if a Throwable occurs while evaluating the BODY
inside a tag or in any of the following methods:
Tag.doStartTag(), Tag.doEndTag(),
IterationTag.doAfterBody() and BodyTag.doInitBody().
|
void |
doFinally()
Invoked in all cases after doEndTag() for any class implementing
Tag, IterationTag or BodyTag.
|
int |
doStartTag()
Default processing of the start tag, returning SKIP_BODY.
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void |
release()
Release state.
|
void |
setVar(String var) |
doAfterBody, doEndTag, findAncestorWithClass, getId, getParent, getValue, getValues, removeValue, setId, setPageContext, setParent, setValue
public void release()
TagSupport
release
in interface Tag
release
in class TagSupport
Tag.release()
public int doStartTag()
TagSupport
doStartTag
in interface Tag
doStartTag
in class TagSupport
Tag.doStartTag()
public void doCatch(Throwable t)
TryCatchFinally
This method is not invoked if the Throwable occurs during one of the setter methods.
This method may throw an exception (the same or a new one) that will be propagated further up the nest chain. If an exception is thrown, doFinally() will be invoked.
This method is intended to be used to respond to an exceptional condition.
doCatch
in interface TryCatchFinally
t
- The throwable exception navigating through this tag.public void doFinally()
TryCatchFinally
This method is not invoked if the Throwable occurs during one of the setter methods.
This method should not throw an Exception.
This method is intended to maintain per-invocation data integrity and resource management actions.
doFinally
in interface TryCatchFinally
public void setVar(String var)
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