org.mmbase.bridge.jsp.taglib
Class ContentTag

java.lang.Object
  javax.servlet.jsp.tagext.TagSupport
      javax.servlet.jsp.tagext.BodyTagSupport
          org.mmbase.bridge.jsp.taglib.ContextReferrerTag
              org.mmbase.bridge.jsp.taglib.CloudReferrerTag
                  org.mmbase.bridge.jsp.taglib.LocaleTag
                      org.mmbase.bridge.jsp.taglib.ContentTag

All Implemented Interfaces:

BodyTag, IterationTag, Serializable, Tag

public class ContentTag

extends LocaleTag

Provided environmental information to its body's tags.

Since:

MMBase-1.7

Version:

$Id: ContentTag.java,v 1.55 2006/07/15 11:50:47 michiel Exp $

Author:

Michiel Meeuwissen

See Also:

Serialized Form

Field Summary

static String

ESCAPER_KEY

Fields inherited from class org.mmbase.bridge.jsp.taglib.LocaleTag

cloud, KEY, locale, prevLocale, SCOPE, TZ_KEY

Fields inherited from class org.mmbase.bridge.jsp.taglib.ContextReferrerTag

contextId, EVAL_BODY, helper, id, pageContextTag, referid, writerid

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

bodyContent

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

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

ContentTag()

Method Summary

protected void	addNoCacheHeaders(HttpServletRequest request, HttpServletResponse response, long expire) The code first sets the Expires header to a date in the past.
protected void	determineLocale()
int	doAfterBody()
int	doEndTag()
int	doStartTag()
static CharTransformer	getCharTransformer(String id, ContextReferrerTag tag) Gets a CharTransformer identified by id, which possibly can also be list of id's in which case a chain of chartransformers will be returned.
String	getEncoding()
protected CharTransformer	getPostProcessor()
protected static CharTransformer	getSimpleCharTransformer(String id, ContextReferrerTag tag) Gets a CharTransformer identified by id, withouth trying to create chains of them.
static ParameterizedTransformerFactory	getTransformerFactory(String id) Returns transformer factory with given id or throws exception if there is none
String	getType()
CharTransformer	getWriteEscaper() Called by children
protected static void	readXML(InputSource escapersSource)
void	setEncoding(String e)
void	setEscaper(String e)
void	setExpires(String e)
void	setPostprocessor(String e)
void	setRefresh(String r)
void	setStatus(String s)
void	setType(String ct)
protected void	setWriteEscaper()
protected void	unsetWriteEscaper()

Methods inherited from class org.mmbase.bridge.jsp.taglib.LocaleTag

determineFromCloudProvider, determineLocaleFromAttributes, getLocale, release, setCountry, setJspvar, setLanguage, setTimezone, setVariant

Methods inherited from class org.mmbase.bridge.jsp.taglib.CloudReferrerTag

fillStandardParameters, findCloudProvider, findCloudProvider, getCloudContext, getCloudVar, getNode, getNodeOrNull, setCloud

Methods inherited from class org.mmbase.bridge.jsp.taglib.ContextReferrerTag

findLoopOrQuery, findParentTag, findParentTag, findParentTag, findParentTag, findWriter, findWriter, getAttribute, getAttributeBoolean, getAttributeInteger, getAttributeInteger, getAttributeValue, getContentTag, getContextProvider, getContextTag, getDefaultLocale, getEscapedValue, getId, getObject, getObjectConditional, getPageContext, getPageContextTag, getReferid, getString, getTaglibVersion, getTimeZone, getWriterValue, haveBody, setContext, setEscape, setId, setListdelimiter, setPageContext, setReferid, setVartype, setWrite, setWriter

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

doInitBody, getBodyContent, getPreviousOut, setBodyContent

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

findAncestorWithClass, getParent, getValue, getValues, removeValue, 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

ESCAPER_KEY

public static final String ESCAPER_KEY

See Also:

Constant Field Values

Constructor Detail

ContentTag

public ContentTag()

Method Detail

readXML

protected static void readXML(InputSource escapersSource)

setType

public void setType(String ct)
             throws JspTagException

Throws:

JspTagException

setEncoding

public void setEncoding(String e)
                 throws JspTagException

Throws:

JspTagException

setEscaper

public void setEscaper(String e)
                throws JspTagException

Throws:

JspTagException

setPostprocessor

public void setPostprocessor(String e)
                      throws JspTagException

Throws:

JspTagException

setExpires

public void setExpires(String e)
                throws JspTagException

Throws:

JspTagException

getType

public String getType()
               throws JspTagException

Throws:

JspTagException

setStatus

public void setStatus(String s)
               throws JspTagException

Throws:

JspTagException

setRefresh

public void setRefresh(String r)
                throws JspTagException

Throws:

JspTagException

getPostProcessor

protected CharTransformer getPostProcessor()
                                    throws JspTagException

Returns:

A CharTransformer or null if no postprocessing needed

Throws:

JspTagException - can occur if taglibcontent.xml is misconfigured

getEncoding

public String getEncoding()
                   throws JspTagException

Throws:

JspTagException

getSimpleCharTransformer

protected static CharTransformer getSimpleCharTransformer(String id,
                                                          ContextReferrerTag tag)
                                                   throws JspTagException

Gets a CharTransformer identified by id, withouth trying to create chains of them.

Throws:

JspTagException

getCharTransformer

public static CharTransformer getCharTransformer(String id,
                                                 ContextReferrerTag tag)
                                          throws JspTagException

Gets a CharTransformer identified by id, which possibly can also be list of id's in which case a chain of chartransformers will be returned.

Returns:

A CharTransformer

Throws:

JspTagException - if not transformer with given id was configured

getTransformerFactory

public static ParameterizedTransformerFactory getTransformerFactory(String id)
                                                             throws JspTagException

Returns transformer factory with given id or throws exception if there is none

Throws:

JspTagException

getWriteEscaper

public CharTransformer getWriteEscaper()

Called by children

Returns:

A CharTransformer (not null)

setWriteEscaper

protected void setWriteEscaper()
                        throws JspTagException

Throws:

JspTagException

unsetWriteEscaper

protected void unsetWriteEscaper()

determineLocale

protected void determineLocale()
                        throws JspTagException

Overrides:

determineLocale in class LocaleTag

Throws:

JspTagException

See Also:

LocaleTag.determineLocale()

doStartTag

public int doStartTag()
               throws JspTagException

Specified by:

doStartTag in interface Tag

Overrides:

doStartTag in class LocaleTag

Throws:

JspTagException

addNoCacheHeaders

protected void addNoCacheHeaders(HttpServletRequest request,
                                 HttpServletResponse response,
                                 long expire)

The code first sets the Expires header to a date in the past. This indicates to the recipient that the page's content have already expired, as a hint that it's contents should not be cached. The no-cache value for the Pragma header is provided by version 1.0 of the HTTP protocol to further indicate that browsers and proxy servers should not cache a page. Version 1.1 of HTTP replaces this header with a more specific Cache-Control header, but recommends including the Pragma header as well for backward compatibility.

Parameters:

response - - http response

expire - - seconds before content should expire

doEndTag

public int doEndTag()
             throws JspTagException

Specified by:

doEndTag in interface Tag

Overrides:

doEndTag in class LocaleTag

Throws:

JspTagException

doAfterBody

public int doAfterBody()
                throws JspTagException

Specified by:

doAfterBody in interface IterationTag

Overrides:

doAfterBody in class LocaleTag

Throws:

JspTagException