org.apache.struts.tiles
Class TilesUtil

java.lang.Object
  org.apache.struts.tiles.TilesUtil

Direct Known Subclasses:

DefinitionsUtil

public class TilesUtil
extends java.lang.Object

Class containing utility methods for Tiles. Methods of this class are static and thereby accessible from anywhere. The underlying implementation can be changed with setTilesUtil(TilesUtilImpl).
Real implementation classes should derive from the TilesUtilImpl class.
Some methods are specified to throw the UnsupportedOperationException if the underlying implementation doesn't support the operation.

Field Summary

protected static org.apache.commons.logging.Log	log Commons Logging instance.
protected static TilesUtilImpl	tilesUtilImpl The implementation of tilesUtilImpl

Constructor Summary

TilesUtil()

Method Summary

static DefinitionsFactory	createDefinitionsFactory(javax.servlet.ServletContext servletContext, DefinitionsFactoryConfig factoryConfig) Create Definition factory from specified configuration object.
static void	doForward(java.lang.String uri, javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, javax.servlet.ServletContext servletContext) Do a forward using request dispatcher.
static void	doInclude(java.lang.String uri, javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, javax.servlet.ServletContext servletContext) Do an include using request dispatcher.
static void	doInclude(java.lang.String uri, javax.servlet.jsp.PageContext pageContext) Do an include using PageContext.include().
static void	doInclude(java.lang.String uri, javax.servlet.jsp.PageContext pageContext, boolean flush) Do an include using PageContext.include().
static ComponentDefinition	getDefinition(java.lang.String definitionName, javax.servlet.ServletRequest request, javax.servlet.ServletContext servletContext) Get a definition by its name.
static DefinitionsFactory	getDefinitionsFactory(javax.servlet.ServletRequest request, javax.servlet.ServletContext servletContext) Get definition factory from appropriate servlet context.
static TilesUtilImpl	getTilesUtil() Get the real implementation.
static void	setTilesUtil(TilesUtilImpl tilesUtil) Set the real implementation.
protected static void	testReset() Reset internal state.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

log

protected static org.apache.commons.logging.Log log

Commons Logging instance.

tilesUtilImpl

protected static TilesUtilImpl tilesUtilImpl

The implementation of tilesUtilImpl

Constructor Detail

TilesUtil

public TilesUtil()

Method Detail

getTilesUtil

public static TilesUtilImpl getTilesUtil()

Get the real implementation.

Returns:

The underlying implementation object.

setTilesUtil

public static void setTilesUtil(TilesUtilImpl tilesUtil)

Set the real implementation. This method should be called only once. Successive calls have no effect.

Parameters:

tilesUtil - The implementaion.

doForward

public static void doForward(java.lang.String uri,
                             javax.servlet.http.HttpServletRequest request,
                             javax.servlet.http.HttpServletResponse response,
                             javax.servlet.ServletContext servletContext)
                      throws java.io.IOException,
                             javax.servlet.ServletException

Do a forward using request dispatcher. This method is used by the Tiles package anytime a forward is required.

Parameters:

uri - Uri or Definition name to forward.

request - Current page request.

response - Current page response.

servletContext - Current servlet context.

Throws:

java.io.IOException

javax.servlet.ServletException

doInclude

public static void doInclude(java.lang.String uri,
                             javax.servlet.http.HttpServletRequest request,
                             javax.servlet.http.HttpServletResponse response,
                             javax.servlet.ServletContext servletContext)
                      throws java.io.IOException,
                             javax.servlet.ServletException

Do an include using request dispatcher. This method is used by the Tiles package when an include is required. The Tiles package can use indifferently any form of this method.

Parameters:

uri - Uri or Definition name to forward.

request - Current page request.

response - Current page response.

servletContext - Current servlet context.

Throws:

java.io.IOException

javax.servlet.ServletException

doInclude

public static void doInclude(java.lang.String uri,
                             javax.servlet.jsp.PageContext pageContext)
                      throws java.io.IOException,
                             javax.servlet.ServletException

Do an include using PageContext.include(). This method is used by the Tiles package when an include is required. The Tiles package can use indifferently any form of this method.

Parameters:

uri - Uri or Definition name to forward.

pageContext - Current page context.

Throws:

java.io.IOException

javax.servlet.ServletException

doInclude

public static void doInclude(java.lang.String uri,
                             javax.servlet.jsp.PageContext pageContext,
                             boolean flush)
                      throws java.io.IOException,
                             javax.servlet.ServletException

Do an include using PageContext.include(). This method is used by the Tiles package when an include is required. The Tiles package can use indifferently any form of this method.

Parameters:

uri - Uri or Definition name to forward.

flush - If the writer should be flushed before the include

pageContext - Current page context.

Throws:

java.io.IOException

javax.servlet.ServletException

getDefinitionsFactory

public static DefinitionsFactory getDefinitionsFactory(javax.servlet.ServletRequest request,
                                                       javax.servlet.ServletContext servletContext)

Get definition factory from appropriate servlet context.

Returns:

Definitions factory or null if not found.

createDefinitionsFactory

public static DefinitionsFactory createDefinitionsFactory(javax.servlet.ServletContext servletContext,
                                                          DefinitionsFactoryConfig factoryConfig)
                                                   throws DefinitionsFactoryException

Create Definition factory from specified configuration object. Create a ConfigurableDefinitionsFactory and initialize it with the configuration object. This later can contain the factory classname to use. Factory is made accessible from tags.

Fallback of several factory creation methods.

Parameters:

servletContext - Servlet Context passed to newly created factory.

factoryConfig - Configuration object passed to factory.

Returns:

newly created factory of type ConfigurableDefinitionsFactory.

Throws:

DefinitionsFactoryException - If an error occur while initializing factory

getDefinition

public static ComponentDefinition getDefinition(java.lang.String definitionName,
                                                javax.servlet.ServletRequest request,
                                                javax.servlet.ServletContext servletContext)
                                         throws FactoryNotFoundException,
                                                DefinitionsFactoryException

Get a definition by its name. First, retrieve definition factory and then get requested definition. Throw appropriate exception if definition or definition factory is not found.

Parameters:

definitionName - Name of requested definition.

request - Current servelet request.

servletContext - current servlet context.

Throws:

FactoryNotFoundException - Can't find definition factory.

DefinitionsFactoryException - General error in factory while getting definition.

NoSuchDefinitionException - No definition found for specified name

testReset

protected static void testReset()

Reset internal state. This method is used by test suites to reset the class to its original state.