org.mmbase.bridge.jsp.taglib
Class ContextReferrerTag

java.lang.Object
  |
  +--javax.servlet.jsp.tagext.TagSupport
        |
        +--javax.servlet.jsp.tagext.BodyTagSupport
              |
              +--org.mmbase.bridge.jsp.taglib.ContextReferrerTag

All Implemented Interfaces:

javax.servlet.jsp.tagext.BodyTag, java.io.Serializable, javax.servlet.jsp.tagext.Tag

Direct Known Subclasses:

CloudReferrerTag, CloudTag, ContextTag, ParamTag, PresentTag, RemoveTag, UrlTag, WriteTag

public abstract class ContextReferrerTag

extends javax.servlet.jsp.tagext.BodyTagSupport

If you want to have attributes which obtain the value from a parameter, extend from this. It also contains a few other 'utily' functions, which can be handy when constructing tags.

Author:

Michiel Meeuwissen

See Also:

Serialized Form

Field Summary

protected ContextTag	pageContextTag
protected java.lang.String	referid

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_TAG

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

EVAL_BODY_INCLUDE, EVAL_PAGE, SKIP_BODY, SKIP_PAGE

Constructor Summary

ContextReferrerTag()

Method Summary

protected javax.servlet.jsp.tagext.TagSupport	findParentTag(java.lang.String classname, java.lang.String id)
protected javax.servlet.jsp.tagext.TagSupport	findParentTag(java.lang.String classname, java.lang.String id, boolean exception) Finds a parent tag by class and id.
protected java.lang.String	getAttributeValue(java.lang.String attribute) Call this function in your set-attribute function.
protected ContextTag	getContextTag() Finds the parent context tag.
protected ContextTag	getContextTag(java.lang.String contextid)
protected java.lang.String	getReferid()
protected java.lang.String	getReferIdValue(java.lang.String attribute)
void	release() Release all allocated resources.
void	setContext(java.lang.String c) Refer to a specific context.
void	setPageContext(javax.servlet.jsp.PageContext pc)
void	setReferid(java.lang.String r)
static java.util.Vector	stringSplitter(java.lang.String string)
static java.util.Vector	stringSplitter(java.lang.String attribute, java.lang.String delimiter) Simple util method to split comma separated values to a vector.

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

doAfterBody, doEndTag, doInitBody, doStartTag, getBodyContent, getPreviousOut, setBodyContent

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

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

Field Detail

pageContextTag

protected ContextTag pageContextTag

referid

protected java.lang.String referid

Constructor Detail

ContextReferrerTag

public ContextReferrerTag()

Method Detail

setPageContext

public void setPageContext(javax.servlet.jsp.PageContext pc)

Overrides:

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

setReferid

public void setReferid(java.lang.String r)
                throws javax.servlet.jsp.JspTagException

getReferid

protected java.lang.String getReferid()
                               throws javax.servlet.jsp.JspTagException

release

public void release()

Release all allocated resources.

Overrides:

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

setContext

public void setContext(java.lang.String c)

Refer to a specific context.

getReferIdValue

protected java.lang.String getReferIdValue(java.lang.String attribute)

getAttributeValue

protected java.lang.String getAttributeValue(java.lang.String attribute)
                                      throws javax.servlet.jsp.JspTagException

Call this function in your set-attribute function. It makes it possible for the user of the taglib to include ids of values stored in the context. The method replaces all occurrences of ${x}, where x is a reference to a attribute value, possibly prefixed with a context name.

findParentTag

protected final javax.servlet.jsp.tagext.TagSupport findParentTag(java.lang.String classname,
                                                                  java.lang.String id,
                                                                  boolean exception)
                                                           throws javax.servlet.jsp.JspTagException

Finds a parent tag by class and id.

Parameters:

classname - the classname of the Tag to find.

id - the id of the Tag to find.

exception - if it has to throw an exception if the parent can not be found (default: yes).

findParentTag

protected final javax.servlet.jsp.tagext.TagSupport findParentTag(java.lang.String classname,
                                                                  java.lang.String id)
                                                           throws javax.servlet.jsp.JspTagException

getContextTag

protected ContextTag getContextTag()
                            throws javax.servlet.jsp.JspTagException

Finds the parent context tag.

getContextTag

protected ContextTag getContextTag(java.lang.String contextid)
                            throws javax.servlet.jsp.JspTagException

stringSplitter

public static java.util.Vector stringSplitter(java.lang.String attribute,
                                              java.lang.String delimiter)

Simple util method to split comma separated values to a vector. Usefull for attributes.

Parameters:

string - the string to split

delimiter -

Returns:

a Vector containing the elements, the elements are also trimed

stringSplitter

public static java.util.Vector stringSplitter(java.lang.String string)