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

Class OutSupport

java.lang.Object

javax.servlet.jsp.tagext.TagSupport

javax.servlet.jsp.tagext.BodyTagSupport

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

All Implemented Interfaces:

Serializable, javax.servlet.jsp.tagext.BodyTag, javax.servlet.jsp.tagext.IterationTag, javax.servlet.jsp.tagext.JspTag, javax.servlet.jsp.tagext.Tag

Direct Known Subclasses:

OutTag, OutTag, OutTag

public abstract class OutSupport
extends javax.servlet.jsp.tagext.BodyTagSupport

Support for handlers of the <out> tag, which simply evalutes and prints the result of the expression it's passed. If the result is null, we print the value of the 'default' attribute's expression or our body (which two are mutually exclusive, although this constraint is enforced outside this handler, in our TagLibraryValidator).

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

Constructor and Description
OutSupport() Constructs a new handler.

Method Summary

Methods

Modifier and Type	Method and Description
int	doAfterBody()
int	doEndTag()
int	doStartTag()
protected abstract String	evalDefault() Evaluates the "default" attribute.
protected abstract boolean	evalEscapeXml() Evaluates the "escapeXml" attribute.
protected abstract Object	evalValue() Evaluates the "value" attribute.
void	release()

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

doInitBody, 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

OutSupport

public OutSupport()

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()

Specified by:

release in interface javax.servlet.jsp.tagext.Tag

Overrides:

release in class javax.servlet.jsp.tagext.BodyTagSupport

doStartTag

public int doStartTag()
               throws javax.servlet.jsp.JspException

Specified by:

doStartTag in interface javax.servlet.jsp.tagext.Tag

Overrides:

doStartTag in class javax.servlet.jsp.tagext.BodyTagSupport

Throws:

javax.servlet.jsp.JspException

evalValue

protected abstract Object evalValue()
                             throws javax.servlet.jsp.JspException

Evaluates the "value" attribute.

Returns:

the actual value of the "value" attribute

Throws:

javax.servlet.jsp.JspException - if there was a problem evaluating the expression

evalDefault

protected abstract String evalDefault()
                               throws javax.servlet.jsp.JspException

Evaluates the "default" attribute.

Returns:

the actual value of the "default" attribute

Throws:

javax.servlet.jsp.JspException - if there was a problem evaluating the expression

evalEscapeXml

protected abstract boolean evalEscapeXml()
                                  throws javax.servlet.jsp.JspException

Evaluates the "escapeXml" attribute.

Returns:

the actual value of the "escapeXml" attribute

Throws:

javax.servlet.jsp.JspException - if there was a problem evaluating the expression

doAfterBody

public int doAfterBody()
                throws javax.servlet.jsp.JspException

Specified by:

doAfterBody in interface javax.servlet.jsp.tagext.IterationTag

Overrides:

doAfterBody in class javax.servlet.jsp.tagext.BodyTagSupport

Throws:

javax.servlet.jsp.JspException

doEndTag

public int doEndTag()
             throws javax.servlet.jsp.JspException

Specified by:

doEndTag in interface javax.servlet.jsp.tagext.Tag

Overrides:

doEndTag in class javax.servlet.jsp.tagext.BodyTagSupport

Throws:

javax.servlet.jsp.JspException