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// Portions Copyright [2019-2022] Payara Foundation and/or affiliates
package org.apache.catalina.core;
import org.apache.catalina.*;
import org.apache.catalina.util.Enumerator;
import org.apache.catalina.util.ServerInfo;
import javax.naming.directory.DirContext;
import jakarta.servlet.*;
import jakarta.servlet.descriptor.JspConfigDescriptor;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.*;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.ConcurrentHashMap;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* Standard implementation of ServletContext that represents
* a web application's execution environment. An instance of this class is
* associated with each instance of StandardContext.
*
* @author Craig R. McClanahan
* @author Remy Maucherat
* @version $Revision: 1.15.2.1 $ $Date: 2008/04/17 18:37:06 $
*/
public class ApplicationContext implements ServletContext {
// ----------------------------------------------------------- Constructors
private static final Logger log = LogFacade.getLogger();
private static final ResourceBundle rb = log.getResourceBundle();
/**
* Construct a new instance of this class, associated with the specified
* Context instance.
*
* @param context The associated Context instance
*/
public ApplicationContext(StandardContext context) {
super();
this.context = context;
setAttribute("com.sun.faces.useMyFaces", context.isUseMyFaces());
}
public StandardContext getStandardContext() {
return context;
}
// ----------------------------------------------------- Class Variables
// START PWC 1.2
/*
private static final SecurityPermission GET_UNWRAPPED_CONTEXT_PERMISSION =
new SecurityPermission("getUnwrappedContext");
*/
// END PWC 1.2
// ----------------------------------------------------- Instance Variables
/**
* The context attributes for this context.
*/
private final Map attributes = new ConcurrentHashMap();
/**
* List of read only attributes for this context.
*/
private final HashMap readOnlyAttributes = new HashMap();
/**
* Lock for synchronizing attributes and readOnlyAttributes
*/
private final Object attributesLock = new Object();
/**
* The Context instance with which we are associated.
*/
private StandardContext context = null;
/**
* Empty String collection to serve as the basis for empty enumerations.
* DO NOT ADD ANY ELEMENTS TO THIS COLLECTION!
*/
private static final List emptyString = Collections.emptyList();
/**
* Empty Servlet collection to serve as the basis for empty enumerations.
* DO NOT ADD ANY ELEMENTS TO THIS COLLECTION!
*/
private static final List emptyServlet = Collections.emptyList();
/**
* The facade around this object.
*/
private final ServletContext facade = new ApplicationContextFacade(this);
/**
* The merged context initialization parameters for this Context.
*/
private final ConcurrentMap parameters = new ConcurrentHashMap();
private boolean isRestricted;
// --------------------------------------------------------- Public Methods
/**
* Return the resources object that is mapped to a specified path.
* The path must begin with a "/" and is interpreted as relative to the
* current context root.
*/
public DirContext getResources() {
return context.getResources();
}
// ------------------------------------------------- ServletContext Methods
/**
* Return the value of the specified context attribute, if any;
* otherwise return null.
*
* @param name Name of the context attribute to return
*/
@Override
public Object getAttribute(String name) {
return attributes.get(name);
}
/**
* Return an enumeration of the names of the context attributes
* associated with this context.
*/
@Override
public Enumeration getAttributeNames() {
return new Enumerator(attributes.keySet(), true);
}
/**
* Returns the context path of the web application.
*
* The context path is the portion of the request URI that is used
* to select the context of the request. The context path always comes
* first in a request URI. The path starts with a "/" character but does
* not end with a "/" character. For servlets in the default (root)
* context, this method returns "".
*
*
It is possible that a servlet container may match a context by
* more than one context path. In such cases the
* {@link jakarta.servlet.http.HttpServletRequest#getContextPath()}
* will return the actual context path used by the request and it may
* differ from the path returned by this method.
* The context path returned by this method should be considered as the
* prime or preferred context path of the application.
*
* @see jakarta.servlet.http.HttpServletRequest#getContextPath()
*/
@Override
public String getContextPath() {
return context.getPath();
}
/**
* Return a ServletContext object that corresponds to a
* specified URI on the server. This method allows servlets to gain
* access to the context for various parts of the server, and as needed
* obtain RequestDispatcher objects or resources from the
* context. The given path must be absolute (beginning with a "/"),
* and is interpreted based on our virtual host's document root.
*
* @param uri Absolute URI of a resource on the server
*/
@Override
public ServletContext getContext(String uri) {
return context.getContext(uri);
}
/**
* Return the value of the specified initialization parameter, or
* null if this parameter does not exist.
*
* @param name Name of the initialization parameter to retrieve
*/
@Override
public String getInitParameter(final String name) {
return parameters.get(name);
}
/**
* Return the names of the context's initialization parameters, or an
* empty enumeration if the context has no initialization parameters.
*/
@Override
public Enumeration getInitParameterNames() {
return (new Enumerator(parameters.keySet()));
}
/**
* @return true if the context initialization parameter with the given
* name and value was set successfully on this ServletContext, and false
* if it was not set because this ServletContext already contains a
* context initialization parameter with a matching name
*/
@Override
public boolean setInitParameter(String name, String value) {
if (isRestricted) {
throw new UnsupportedOperationException(
rb.getString(LogFacade.UNSUPPORTED_OPERATION_EXCEPTION));
}
return parameters.putIfAbsent(name, value) == null;
}
/**
* Return the major version of the Java Servlet API that we implement.
*/
@Override
public int getMajorVersion() {
return (Constants.MAJOR_VERSION);
}
/**
* Return the minor version of the Java Servlet API that we implement.
*/
@Override
public int getMinorVersion() {
return (Constants.MINOR_VERSION);
}
/**
* Gets the major version of the Servlet specification that the
* application represented by this ServletContext is based on.
*/
@Override
public int getEffectiveMajorVersion() {
return context.getEffectiveMajorVersion();
}
/**
* Gets the minor version of the Servlet specification that the
* application represented by this ServletContext is based on.
*/
@Override
public int getEffectiveMinorVersion() {
return context.getEffectiveMinorVersion();
}
/**
* Return the MIME type of the specified file, or null if
* the MIME type cannot be determined.
*
* @param file Filename for which to identify a MIME type
*/
@Override
public String getMimeType(String file) {
return context.getMimeType(file);
}
/**
* Return a RequestDispatcher object that acts as a
* wrapper for the named servlet.
*
* @param name Name of the servlet for which a dispatcher is requested
*/
@Override
public RequestDispatcher getNamedDispatcher(String name) {
return context.getNamedDispatcher(name);
}
/**
* @param path The virtual path to be translated
*
* @return the real path corresponding to the given virtual path, or
* null if the container was unable to perform the
* translation
*/
@Override
public String getRealPath(String path) {
return context.getRealPath(path);
}
/**
* Return a RequestDispatcher instance that acts as a
* wrapper for the resource at the given path. The path must begin
* with a "/" or be empty, and is interpreted as relative to the current
* context root.
*
* @param path The path to the desired resource.
*/
@Override
public RequestDispatcher getRequestDispatcher(String path) {
return context.getRequestDispatcher(path);
}
/**
* Return the URL to the resource that is mapped to a specified path.
* The path must begin with a "/" and is interpreted as relative to the
* current context root.
*
* @param path The path to the desired resource
*
* @exception MalformedURLException if the path is not given
* in the correct form
*/
@Override
public URL getResource(String path)
throws MalformedURLException {
return context.getResource(path);
}
/**
* Return the requested resource as an InputStream. The
* path must be specified according to the rules described under
* getResource. If no such resource can be identified,
* return null.
*
* @param path The path to the desired resource.
*/
@Override
public InputStream getResourceAsStream(String path) {
return context.getResourceAsStream(path);
}
/**
* Return a Set containing the resource paths of resources member of the
* specified collection. Each path will be a String starting with
* a "/" character. The returned set is immutable.
*
* @param path Collection path
*/
@Override
public Set getResourcePaths(String path) {
return context.getResourcePaths(path);
}
/**
* Return the name and version of the servlet container.
*/
@Override
public String getServerInfo() {
return (ServerInfo.getServerInfo());
}
/**
* Return the display name of this web application.
*/
@Override
public String getServletContextName() {
return (context.getDisplayName());
}
/**
* Writes the specified message to a servlet log file.
*
* @param message Message to be written
*/
@Override
public void log(String message) {
context.log(message);
}
/**
* Writes the specified message and exception to a servlet log file.
*
* @param message Message to be written
* @param throwable Exception to be reported
*/
@Override
public void log(String message, Throwable throwable) {
context.log(message, throwable);
}
/**
* Remove the context attribute with the specified name, if any.
*
* @param name Name of the context attribute to be removed
*/
@Override
public void removeAttribute(String name) {
Object value = null;
boolean found = false;
// Remove the specified attribute
synchronized (attributesLock) {
// Check for read only attribute
if (readOnlyAttributes.containsKey(name))
return;
value = attributes.remove(name);
if (value == null)
return;
}
// Notify interested application event listeners
List listeners = context.getApplicationEventListeners();
if (listeners.isEmpty()) {
return;
}
ServletContextAttributeEvent event =
new ServletContextAttributeEvent(context.getServletContext(),
name, value);
Iterator iter = listeners.iterator();
while (iter.hasNext()) {
EventListener eventListener = iter.next();
if (!(eventListener instanceof ServletContextAttributeListener)) {
continue;
}
ServletContextAttributeListener listener =
(ServletContextAttributeListener) eventListener;
try {
context.fireContainerEvent(
ContainerEvent.BEFORE_CONTEXT_ATTRIBUTE_REMOVED,
listener);
listener.attributeRemoved(event);
context.fireContainerEvent(
ContainerEvent.AFTER_CONTEXT_ATTRIBUTE_REMOVED,
listener);
} catch (Throwable t) {
context.fireContainerEvent(
ContainerEvent.AFTER_CONTEXT_ATTRIBUTE_REMOVED,
listener);
// FIXME - should we do anything besides log these?
log.log(Level.WARNING,
LogFacade.ATTRIBUTES_EVENT_LISTENER_EXCEPTION, t);
}
}
}
/**
* Bind the specified value with the specified context attribute name,
* replacing any existing value for that name.
*
* @param name Attribute name to be bound
* @param value New attribute value to be bound
*/
@Override
public void setAttribute(String name, Object value) {
// Name cannot be null
if (name == null)
throw new NullPointerException
(rb.getString(LogFacade.NULL_NAME_EXCEPTION));
// Null value is the same as removeAttribute()
if (value == null) {
removeAttribute(name);
return;
}
Object oldValue = null;
boolean replaced = false;
// Add or replace the specified attribute
synchronized (attributesLock) {
// Check for read only attribute
if (readOnlyAttributes.containsKey(name))
return;
oldValue = attributes.get(name);
if (oldValue != null)
replaced = true;
attributes.put(name, value);
}
if (name.equals(Globals.CLASS_PATH_ATTR) ||
name.equals(Globals.JSP_TLD_URI_TO_LOCATION_MAP)) {
setAttributeReadOnly(name);
}
// Notify interested application event listeners
List listeners =
context.getApplicationEventListeners();
if (listeners.isEmpty()) {
return;
}
ServletContextAttributeEvent event = null;
if (replaced) {
event =
new ServletContextAttributeEvent(context.getServletContext(),
name, oldValue);
} else {
event =
new ServletContextAttributeEvent(context.getServletContext(),
name, value);
}
Iterator iter = listeners.iterator();
while (iter.hasNext()) {
EventListener eventListener = iter.next();
if (!(eventListener instanceof ServletContextAttributeListener)) {
continue;
}
ServletContextAttributeListener listener =
(ServletContextAttributeListener) eventListener;
try {
if (replaced) {
context.fireContainerEvent(
ContainerEvent.BEFORE_CONTEXT_ATTRIBUTE_REPLACED,
listener);
listener.attributeReplaced(event);
context.fireContainerEvent(
ContainerEvent.AFTER_CONTEXT_ATTRIBUTE_REPLACED,
listener);
} else {
context.fireContainerEvent(
ContainerEvent.BEFORE_CONTEXT_ATTRIBUTE_ADDED,
listener);
listener.attributeAdded(event);
context.fireContainerEvent(
ContainerEvent.AFTER_CONTEXT_ATTRIBUTE_ADDED,
listener);
}
} catch (Throwable t) {
if (replaced) {
context.fireContainerEvent(
ContainerEvent.AFTER_CONTEXT_ATTRIBUTE_REPLACED,
listener);
} else {
context.fireContainerEvent(
ContainerEvent.AFTER_CONTEXT_ATTRIBUTE_ADDED,
listener);
}
// FIXME - should we do anything besides log these?
log.log(Level.WARNING, LogFacade.ATTRIBUTES_EVENT_LISTENER_EXCEPTION, t);
}
}
}
/*
* Adds the servlet with the given name and class name to this
* servlet context.
*/
@Override
public ServletRegistration.Dynamic addServlet(
String servletName, String className) {
if (isRestricted) {
throw new UnsupportedOperationException(
rb.getString(LogFacade.UNSUPPORTED_OPERATION_EXCEPTION));
}
return context.addServlet(servletName, className);
}
/*
* Registers the given servlet instance with this ServletContext
* under the given servletName.
*/
@Override
public ServletRegistration.Dynamic addServlet(
String servletName, Servlet servlet) {
if (isRestricted) {
throw new UnsupportedOperationException(
rb.getString(LogFacade.UNSUPPORTED_OPERATION_EXCEPTION));
}
return context.addServlet(servletName, servlet);
}
/*
* Adds the servlet with the given name and class type to this
* servlet context.
*/
@Override
public ServletRegistration.Dynamic addServlet(String servletName,
Class servletClass) {
if (isRestricted) {
throw new UnsupportedOperationException(
rb.getString(LogFacade.UNSUPPORTED_OPERATION_EXCEPTION));
}
return context.addServlet(servletName, servletClass);
}
/*
* Adds the servlet with the given name and jsp file to this
* servlet context.
*/
@Override
public ServletRegistration.Dynamic addJspFile(
String servletName, String jspFile) {
if (isRestricted) {
throw new UnsupportedOperationException(
rb.getString(LogFacade.UNSUPPORTED_OPERATION_EXCEPTION));
}
return context.addJspFile(servletName, jspFile);
}
/**
* Instantiates the given Servlet class and performs any required
* resource injection into the new Servlet instance before returning
* it.
*/
@Override
public T createServlet(Class clazz)
throws ServletException {
if (isRestricted) {
throw new UnsupportedOperationException(
rb.getString(LogFacade.UNSUPPORTED_OPERATION_EXCEPTION));
}
return context.createServlet(clazz);
}
/**
* Gets the ServletRegistration corresponding to the servlet with the
* given servletName.
*/
@Override
public ServletRegistration getServletRegistration(String servletName) {
if (isRestricted) {
throw new UnsupportedOperationException(
rb.getString(LogFacade.UNSUPPORTED_OPERATION_EXCEPTION));
}
return context.getServletRegistration(servletName);
}
/**
* Gets a Map of the ServletRegistration objects corresponding to all
* currently registered servlets.
*/
@Override
public Map getServletRegistrations() {
if (isRestricted) {
throw new UnsupportedOperationException(
rb.getString(LogFacade.UNSUPPORTED_OPERATION_EXCEPTION));
}
return context.getServletRegistrations();
}
/**
* Adds the filter with the given name and class name to this servlet
* context.
*/
@Override
public FilterRegistration.Dynamic addFilter(
String filterName, String className) {
if (isRestricted) {
throw new UnsupportedOperationException(
rb.getString(LogFacade.UNSUPPORTED_OPERATION_EXCEPTION));
}
return context.addFilter(filterName, className);
}
/*
* Registers the given filter instance with this ServletContext
* under the given filterName.
*/
@Override
public FilterRegistration.Dynamic addFilter(
String filterName, Filter filter) {
if (isRestricted) {
throw new UnsupportedOperationException(
rb.getString(LogFacade.UNSUPPORTED_OPERATION_EXCEPTION));
}
return context.addFilter(filterName, filter);
}
/**
* Adds the filter with the given name and class type to this servlet
* context.
*/
@Override
public FilterRegistration.Dynamic addFilter(String filterName,
Class filterClass) {
if (isRestricted) {
throw new UnsupportedOperationException(
rb.getString(LogFacade.UNSUPPORTED_OPERATION_EXCEPTION));
}
return context.addFilter(filterName, filterClass);
}
/**
* Instantiates the given Filter class and performs any required
* resource injection into the new Filter instance before returning
* it.
*/
@Override
public T createFilter(Class clazz)
throws ServletException {
if (isRestricted) {
throw new UnsupportedOperationException(
rb.getString(LogFacade.UNSUPPORTED_OPERATION_EXCEPTION));
}
return context.createFilter(clazz);
}
/**
* Gets the FilterRegistration corresponding to the filter with the
* given filterName.
*/
@Override
public FilterRegistration getFilterRegistration(String filterName) {
if (isRestricted) {
throw new UnsupportedOperationException(
rb.getString(LogFacade.UNSUPPORTED_OPERATION_EXCEPTION));
}
return context.getFilterRegistration(filterName);
}
/**
* Gets a Map of the FilterRegistration objects corresponding to all
* currently registered filters.
*/
@Override
public Map getFilterRegistrations() {
if (isRestricted) {
throw new UnsupportedOperationException(
rb.getString(LogFacade.UNSUPPORTED_OPERATION_EXCEPTION));
}
return context.getFilterRegistrations();
}
/**
* Gets the SessionCookieConfig object through which various
* properties of the session tracking cookies created on behalf of this
* ServletContext may be configured.
*/
@Override
public SessionCookieConfig getSessionCookieConfig() {
if (isRestricted) {
throw new UnsupportedOperationException(
rb.getString(LogFacade.UNSUPPORTED_OPERATION_EXCEPTION));
}
return context.getSessionCookieConfig();
}
/**
* Sets the session tracking modes that are to become effective for this
* ServletContext.
*/
@Override
public void setSessionTrackingModes(
Set sessionTrackingModes) {
if (isRestricted) {
throw new UnsupportedOperationException(
rb.getString(LogFacade.UNSUPPORTED_OPERATION_EXCEPTION));
}
context.setSessionTrackingModes(sessionTrackingModes);
}
/**
* Gets the session tracking modes that are supported by default for this
* ServletContext.
*
* @return set of the session tracking modes supported by default for
* this ServletContext
*/
@Override
public Set getDefaultSessionTrackingModes() {
return context.getDefaultSessionTrackingModes();
}
/**
* Gets the session tracking modes that are in effect for this
* ServletContext.
*
* @return set of the session tracking modes in effect for this
* ServletContext
*/
@Override
public Set getEffectiveSessionTrackingModes() {
return context.getEffectiveSessionTrackingModes();
}
/**
* Adds the listener with the given class name to this ServletContext.
*/
@Override
public void addListener(String className) {
if (isRestricted) {
throw new UnsupportedOperationException(
rb.getString(LogFacade.UNSUPPORTED_OPERATION_EXCEPTION));
}
context.addListener(className);
}
/**
* Adds the given listener to this ServletContext.
*/
@Override
public void addListener(T t) {
if (isRestricted) {
throw new UnsupportedOperationException(
rb.getString(LogFacade.UNSUPPORTED_OPERATION_EXCEPTION));
}
context.addListener(t);
}
/**
* Adds a listener of the given class type to this ServletContext.
*/
@Override
public void addListener(Class listenerClass) {
if (isRestricted) {
throw new UnsupportedOperationException(
rb.getString(LogFacade.UNSUPPORTED_OPERATION_EXCEPTION));
}
context.addListener(listenerClass);
}
/**
* Instantiates the given EventListener class and performs any
* required resource injection into the new EventListener instance
* before returning it.
*/
@Override
public T createListener(Class clazz)
throws ServletException {
if (isRestricted) {
throw new UnsupportedOperationException(
rb.getString(LogFacade.UNSUPPORTED_OPERATION_EXCEPTION));
}
return context.createListener(clazz);
}
/**
* Gets the <jsp-config> related configuration
* that was aggregated from the web.xml and
* web-fragment.xml descriptor files of the web application
* represented by this ServletContext.
*/
@Override
public JspConfigDescriptor getJspConfigDescriptor() {
return context.getJspConfigDescriptor();
}
@Override
public ClassLoader getClassLoader() {
return context.getClassLoader();
}
@Override
public void declareRoles(String... roleNames) {
if (isRestricted) {
throw new UnsupportedOperationException(
rb.getString(LogFacade.UNSUPPORTED_OPERATION_EXCEPTION));
}
context.declareRoles(roleNames);
}
@Override
public String getVirtualServerName() {
return context.getVirtualServerName();
}
@Override
public int getSessionTimeout() {
return context.getSessionTimeout();
}
@Override
public void setSessionTimeout(int sessionTimeout) {
if (isRestricted) {
throw new UnsupportedOperationException(
rb.getString(LogFacade.UNSUPPORTED_OPERATION_EXCEPTION));
}
context.setSessionTimeout(sessionTimeout);
}
@Override
public String getRequestCharacterEncoding() {
return context.getRequestCharacterEncoding();
}
@Override
public void setRequestCharacterEncoding(String encoding) {
if (isRestricted) {
throw new UnsupportedOperationException(rb.getString(LogFacade.UNSUPPORTED_OPERATION_EXCEPTION));
}
context.setRequestCharacterEncoding(encoding);
}
@Override
public String getResponseCharacterEncoding() {
return context.getResponseCharacterEncoding();
}
@Override
public void setResponseCharacterEncoding(String encoding) {
if (isRestricted) {
throw new UnsupportedOperationException(
rb.getString(LogFacade.UNSUPPORTED_OPERATION_EXCEPTION));
}
context.setResponseCharacterEncoding(encoding);
}
// START PWC 1.2
/**
* Gets the underlying StandardContext to which this ApplicationContext is
* delegating.
*
* @return The underlying StandardContext
*/
/*
public StandardContext getUnwrappedContext() {
SecurityManager sm = System.getSecurityManager();
if (sm != null) {
sm.checkPermission(GET_UNWRAPPED_CONTEXT_PERMISSION);
}
return this.context;
}
*/
// END PWC 1.2
// -------------------------------------------------------- Package Methods
/**
* Clear all application-created attributes.
*/
void clearAttributes() {
// Create list of attributes to be removed
ArrayList list = new ArrayList();
synchronized (attributesLock) {
Iterator iter = attributes.keySet().iterator();
while (iter.hasNext()) {
list.add(iter.next());
}
}
// Remove application originated attributes
// (read only attributes will be left in place)
Iterator keys = list.iterator();
while (keys.hasNext()) {
String key = keys.next();
removeAttribute(key);
}
}
/**
* Return the facade associated with this ApplicationContext.
*/
protected ServletContext getFacade() {
return this.facade;
}
/**
* Set an attribute as read only.
*/
void setAttributeReadOnly(String name) {
synchronized (attributesLock) {
if (attributes.containsKey(name))
readOnlyAttributes.put(name, name);
}
}
void setRestricted(boolean isRestricted) {
this.isRestricted = isRestricted;
}
}