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Java Source Code / Java Documentation » EJB Server geronimo » plugins » org.apache.geronimo.jasper 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


org.apache.geronimo.jasper.GeronimoTldLocationsCache

GeronimoTldLocationsCache
public class GeronimoTldLocationsCache extends TldLocationsCache (Code)
A container for all tag libraries that are defined "globally" for the web application. Tag Libraries can be defined globally in one of two ways: 1. Via elements in web.xml: the uri and location of the tag-library are specified in the element. 2. Via packaged jar files that contain .tld files within the META-INF directory, or some subdirectory of it. The taglib is 'global' if it has the element defined. A mapping between the taglib URI and its associated TaglibraryInfoImpl is maintained in this container. Actually, that's what we'd like to do. However, because of the way the classes TagLibraryInfo and TagInfo have been defined, it is not currently possible to share an instance of TagLibraryInfo across page invocations. A bug has been submitted to the spec lead. In the mean time, all we do is save the 'location' where the TLD associated with a taglib URI can be found. When a JSP page has a taglib directive, the mappings in this container are first searched (see method getLocation()). If a mapping is found, then the location of the TLD is returned. If no mapping is found, then the uri specified in the taglib directive is to be interpreted as the location for the TLD of this tag library. This class was copied from tomcat to allow Geronimo to override Jasper's default TldLocationsCache which does not work with Geronimo's MultiParentClassLoader. Copying was necessary because most of the essential methods and member variables were private.
author:
   Pierre Delisle
author:
   Jan Luehe


Field Summary
final public static  intABS_URI
    
final public static  intNOROOT_REL_URI
    
final public static  intROOT_REL_URI
    
 ArrayList<String>scannedJars
    

Constructor Summary
public  GeronimoTldLocationsCache(ServletContext ctxt)
    
public  GeronimoTldLocationsCache(ServletContext ctxt, boolean redeployMode)
     Constructor.

Method Summary
public  String[]getLocation(String uri)
     Gets the 'location' of the TLD associated with the given taglib 'uri'. Returns null if the uri is not associated with any tag library 'exposed' in the web application.
public static  voidsetNoTldJars(String jarNames)
     Sets the list of JARs that are known not to contain any TLDs.

Field Detail
ABS_URI
final public static int ABS_URI(Code)
The types of URI one may specify for a tag library



NOROOT_REL_URI
final public static int NOROOT_REL_URI(Code)



ROOT_REL_URI
final public static int ROOT_REL_URI(Code)



scannedJars
ArrayList<String> scannedJars(Code)




Constructor Detail
GeronimoTldLocationsCache
public GeronimoTldLocationsCache(ServletContext ctxt)(Code)



GeronimoTldLocationsCache
public GeronimoTldLocationsCache(ServletContext ctxt, boolean redeployMode)(Code)
Constructor.
Parameters:
  ctxt - the servlet context of the web application in which Jasper is running
Parameters:
  redeployMode - if true, then the compiler will allow redeploying a tag library from the same jar, at the expense of slowing down theserver a bit. Note that this may only work on JDK 1.3.1_01a and later,because of JDK bug 4211817 fixed in this release.If redeployMode is false, a faster but less capable mode will be used.




Method Detail
getLocation
public String[] getLocation(String uri) throws JasperException(Code)
Gets the 'location' of the TLD associated with the given taglib 'uri'. Returns null if the uri is not associated with any tag library 'exposed' in the web application. A tag library is 'exposed' either explicitly in web.xml or implicitly via the uri tag in the TLD of a taglib deployed in a jar file (WEB-INF/lib).
Parameters:
  uri - The taglib uri An array of two Strings: The first element denotes the realpath to the TLD. If the path to the TLD points to a jar file, then thesecond element denotes the name of the TLD entry in the jar file.Returns null if the uri is not associated with any tag library 'exposed'in the web application.



setNoTldJars
public static void setNoTldJars(String jarNames)(Code)
Sets the list of JARs that are known not to contain any TLDs.
Parameters:
  jarNames - List of comma-separated names of JAR files that are known not to contain any TLDs



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