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package com.sun.enterprise.web.jsp;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.ServletContext;
import javax.servlet.jsp.tagext.JspTag;
import org.apache.catalina.core.ApplicationContextFacade;
import org.apache.catalina.core.StandardContext;
import org.apache.jasper.runtime.ResourceInjector;
import com.sun.enterprise.Switch;
import com.sun.enterprise.deployment.JndiNameEnvironment;
import com.sun.enterprise.InjectionManager;
import com.sun.logging.LogDomains;
/**
* SJSAS implementation of the org.apache.jasper.runtime.ResourceInjector
* interface.
*
* @author Jan Luehe
*/
public class ResourceInjectorImpl implements ResourceInjector {
private static final Logger logger = LogDomains.getLogger(
LogDomains.WEB_LOGGER);
private InjectionManager injectionMgr;
private JndiNameEnvironment desc;
/**
* Constructor.
*/
public ResourceInjectorImpl() {
injectionMgr = Switch.getSwitch().getInjectionManager();
}
/**
* Associates this ResourceInjector with the component environment of the
* given servlet context.
*
* @param servletContext The servlet context
*/
public void setContext(ServletContext servletContext) {
if (!(servletContext instanceof ApplicationContextFacade)) {
return;
}
final ApplicationContextFacade contextFacade =
(ApplicationContextFacade) servletContext;
StandardContext context = null;
if (System.getSecurityManager() != null) {
context = (StandardContext) AccessController.doPrivileged(
new PrivilegedAction() {
public Object run() {
return contextFacade.getUnwrappedContext();
}
});
} else {
context = contextFacade.getUnwrappedContext();
}
if (context != null) {
desc = (JndiNameEnvironment)
Switch.getSwitch().getDescriptorFor(context);
}
}
/**
* Injects the injectable resources from the component environment
* associated with this ResourceInjectorImpl into the given
* tag handler instance.
*
* <p>Any @PostConstruct methods on the class (and super-classes)
* of the instance will be invoked after injection.
*
* @param handler The tag handler instance to be injected
*
* @throws Exception if an error occurs during injection
*/
public void inject(JspTag handler) throws Exception {
if (desc != null) {
injectionMgr.injectInstance(handler, desc);
}
}
/**
* Invokes any @PreDestroy methods defined on the instance's class
* (and super-classes).
*
* @param handler The tag handler instance whose @PreDestroy methods
* to call
*/
public void preDestroy(JspTag handler) {
if (desc != null) {
try {
injectionMgr.invokeInstancePreDestroy(handler, desc);
} catch (Exception e) {
logger.log(Level.WARNING, "Exception during invocation of " +
"PreDestroy on JSP tag handler " + handler, e);
}
}
}
}