org.mentawai.tag.util
Class PrintTag

java.lang.Object
  javax.servlet.jsp.tagext.TagSupport
      javax.servlet.jsp.tagext.BodyTagSupport
          org.mentawai.tag.util.PrintTag

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:

ContextPath, CurrPage, HTMLTag, NoCache, Out, PrintBodyTag, PrintError, PrintFromBodyTag, PrintFromContextTag, PrintI18N, PrintI18NDir, PrintMessage, ReCaptchaTag, ResultFrom, ResultTo, ResultTotal, RewriteWithLoc, StringEscapeJS

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

A very easy abstract class to create custom tags that print something to the screen.

Author:

Sergio Oliveira

See Also:

Serialized Form

Field Summary

protected Action	action
protected javax.servlet.ServletContext	application
protected Locale	loc
protected int	maxToPrint
protected boolean	noHTML
protected javax.servlet.http.HttpServletRequest	req
protected javax.servlet.http.HttpServletResponse	res
protected javax.servlet.http.HttpSession	session

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

PrintTag()

Method Summary

int	doEndTag()
int	doStartTag()
protected String	getBody()
static Boolean	getBooleanValue(Object bean, String value)
Object	getSessionObj()
abstract String	getStringToPrint() Override this method to return what you want to print in the screen.
static Object	getValue(Object bean, String name, boolean tryBoolean) Finds a value through reflection.
Object	getValue(String value)
Object	getValue(String value, boolean tryBoolean)
static Object	getValue(String expression, Object bean, boolean tryBoolean) Finds a value for the corresponding expression.
static Object	getValue(String expression, javax.servlet.jsp.PageContext pageContext, boolean tryBoolean) Finds a value for the corresponding expression.
void	setMax(int maxToPrint)
void	setNoHTML(boolean flag)

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

doAfterBody, doInitBody, getBodyContent, getPreviousOut, release, setBodyContent

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

findAncestorWithClass, getId, getParent, 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

Field Detail

application

protected javax.servlet.ServletContext application

session

protected javax.servlet.http.HttpSession session

req

protected javax.servlet.http.HttpServletRequest req

res

protected javax.servlet.http.HttpServletResponse res

action

protected Action action

loc

protected Locale loc

maxToPrint

protected int maxToPrint

noHTML

protected boolean noHTML

Constructor Detail

PrintTag

public PrintTag()

Method Detail

setMax

public void setMax(int maxToPrint)

setNoHTML

public void setNoHTML(boolean flag)

getValue

public Object getValue(String value)

Overrides:

getValue in class javax.servlet.jsp.tagext.TagSupport

getValue

public Object getValue(String value,
                       boolean tryBoolean)

getSessionObj

public Object getSessionObj()

getStringToPrint

public abstract String getStringToPrint()
                                 throws javax.servlet.jsp.JspException

Override this method to return what you want to print in the screen.

Returns:

The string to print.

Throws:

javax.servlet.jsp.JspException

getBody

protected String getBody()

getBooleanValue

public static Boolean getBooleanValue(Object bean,
                                      String value)

getValue

public static Object getValue(Object bean,
                              String name,
                              boolean tryBoolean)

Finds a value through reflection.

Parameters:

bean - The object in where to look for the value.

name - The name of the attribute.

tryBoolean - Should I try isXXX and hasXXX ?

Returns:

The value found by reflection or null.

Since:

1.1.1

getValue

public static Object getValue(String expression,
                              javax.servlet.jsp.PageContext pageContext,
                              boolean tryBoolean)

Finds a value for the corresponding expression. This is useful to look for expressions like user.name.firstName. It works pretty much like a JSP Expression Language.

Parameters:

expression - The expression to look for.

pageContext - The pageContext of the tag.

tryBoolean - Should I try isXXX and has XXX ?

Returns:

The value corresponding to the expression.

Since:

1.1.1

getValue

public static Object getValue(String expression,
                              Object bean,
                              boolean tryBoolean)

Finds a value for the corresponding expression. This is useful to look for expressions like user.name.firstName. It works pretty much like a JSP Expression Language, but it searches a java Object.

Parameters:

expression - The expression to look for.

bean - The bean where to search.

tryBoolean - Should I try isXXX and has XXX ?

Returns:

The value corresponding to the expression.

Since:

1.3

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

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