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

java.lang.Object
  javax.servlet.jsp.tagext.TagSupport
      javax.servlet.jsp.tagext.BodyTagSupport
          org.apache.taglibs.standard.tag.common.core.ImportSupport

All Implemented Interfaces:

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

Direct Known Subclasses:

ImportTag, ImportTag

public abstract class ImportSupport
extends javax.servlet.jsp.tagext.BodyTagSupport
implements javax.servlet.jsp.tagext.TryCatchFinally, ParamParent

Support for tag handlers for <import>, the general-purpose text-importing mechanism for JSTL 1.0. The rtexprvalue and expression- evaluating libraries each have handlers that extend this class.

Author:

Shawn Bayern

See Also:

Serialized Form

Field Summary

protected String	charEncoding
protected String	context
static String	DEFAULT_ENCODING Default character encoding for response.
protected String	url
static String	VALID_SCHEME_CHARS Valid characters in a scheme.

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

ImportSupport()

Method Summary

void	addParameter(String name, String value) Adds a parameter to this tag's URL.
void	doCatch(Throwable t)
int	doEndTag()
void	doFinally()
int	doStartTag()
static boolean	isAbsoluteUrl(String url) Returns true if our current URL is absolute, false otherwise.
void	release()
void	setScope(String scope)
void	setVar(String var)
void	setVarReader(String varReader)
static String	stripSession(String url) Strips a servlet session ID from url.

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

doAfterBody, 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

Field Detail

VALID_SCHEME_CHARS

public static final String VALID_SCHEME_CHARS

Valid characters in a scheme.

RFC 1738 says the following:

Scheme names consist of a sequence of characters. The lower case letters "a"--"z", digits, and the characters plus ("+"), period ("."), and hyphen ("-") are allowed. For resiliency, programs interpreting URLs should treat upper case letters as equivalent to lower case in scheme names (e.g., allow "HTTP" as well as "http").

We treat as absolute any URL that begins with such a scheme name, followed by a colon.

See Also:

Constant Field Values

DEFAULT_ENCODING

public static final String DEFAULT_ENCODING

Default character encoding for response.

See Also:

Constant Field Values

url

protected String url

context

protected String context

charEncoding

protected String charEncoding

Constructor Detail

ImportSupport

public ImportSupport()

Method Detail

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

doCatch

public void doCatch(Throwable t)
             throws Throwable

Specified by:

doCatch in interface javax.servlet.jsp.tagext.TryCatchFinally

Throws:

Throwable

doFinally

public void doFinally()

Specified by:

doFinally in interface javax.servlet.jsp.tagext.TryCatchFinally

release

public void release()

Specified by:

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

Overrides:

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

setVar

public void setVar(String var)

setVarReader

public void setVarReader(String varReader)

setScope

public void setScope(String scope)

addParameter

public void addParameter(String name,
                         String value)

Description copied from interface: ParamParent

Adds a parameter to this tag's URL. The intent is that the <param> subtag will call this to register URL parameters. Assumes that 'name' and 'value' are appropriately encoded and do not contain any meaningful metacharacters; in order words, escaping is the responsibility of the caller.

Specified by:

addParameter in interface ParamParent

See Also:

ParamSupport

isAbsoluteUrl

public static boolean isAbsoluteUrl(String url)

Returns true if our current URL is absolute, false otherwise.

stripSession

public static String stripSession(String url)

Strips a servlet session ID from url. The session ID is encoded as a URL "path parameter" beginning with "jsessionid=". We thus remove anything we find between ";jsessionid=" (inclusive) and either EOS or a subsequent ';' (exclusive).