org.apache.myfaces.util
Class ContainerUtils

java.lang.Object
  org.apache.myfaces.util.ContainerUtils

public class ContainerUtils
extends Object

Utilities for determining the current container and for the unified expression language.

Constructor Summary

ContainerUtils()

Method Summary

static boolean	isJsp21(javax.servlet.ServletContext context) Determines whether we're running in a Servlet 2.5/JSP 2.1 environment.
static boolean	isRunningOnGoogleAppEngine(ExternalContext externalContext)
static boolean	isRunningOnGoogleAppEngine(javax.servlet.ServletContext servletContext) Returns true if running on Google App Engine (both production and development environment).
static boolean	isValueReference(String value) Return true if the specified string contains an EL expression.

Methods inherited from class java.lang.Object

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

Constructor Detail

ContainerUtils

public ContainerUtils()

Method Detail

isJsp21

public static boolean isJsp21(javax.servlet.ServletContext context)

Determines whether we're running in a Servlet 2.5/JSP 2.1 environment.

Returns:

true if we're running in a JSP 2.1 environment, false otherwise

isValueReference

public static boolean isValueReference(String value)

Return true if the specified string contains an EL expression.

NOTICE This method is just a copy of UIComponentTag#isValueReference(String), but it's required because the class UIComponentTag depends on a JSP 2.1 container (for example, it indirectly implements the interface JspIdConsumer) and therefore internal classes shouldn't access this class. That's also the reason why this method is inside the class ContainerUtils, because it allows MyFaces to be independent of a JSP 2.1 container.

isRunningOnGoogleAppEngine

public static boolean isRunningOnGoogleAppEngine(javax.servlet.ServletContext servletContext)

Returns true if running on Google App Engine (both production and development environment).

If this method returns true, then

• MyFaces is initialized as in JSP 2.0 or less environment.
• Last modification check of faces config is not done during update.

isRunningOnGoogleAppEngine

public static boolean isRunningOnGoogleAppEngine(ExternalContext externalContext)

See Also:

isRunningOnGoogleAppEngine(ServletContext)