| /* |
| * Copyright 1999,2004 The Apache Software Foundation. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| |
| package org.apache.naming; |
| |
| import java.util.Hashtable; |
| import javax.naming.Context; |
| import javax.naming.Name; |
| import javax.naming.NameParser; |
| import javax.naming.NamingEnumeration; |
| import javax.naming.NamingException; |
| |
| /** |
| * Catalina JNDI Context implementation. |
| * |
| * @author Remy Maucherat |
| * @version $Revision$ $Date$ |
| */ |
| |
| public class SelectorContext implements Context { |
| |
| |
| // -------------------------------------------------------------- Constants |
| |
| |
| /** |
| * Namespace URL. |
| */ |
| public static final String prefix = "java:"; |
| |
| |
| /** |
| * Namespace URL length. |
| */ |
| public static final int prefixLength = prefix.length(); |
| |
| |
| /** |
| * Initial context prefix. |
| */ |
| public static final String IC_PREFIX = "IC_"; |
| |
| |
| // ----------------------------------------------------------- Constructors |
| |
| |
| /** |
| * Builds a Catalina selector context using the given environment. |
| */ |
| public SelectorContext(Hashtable env) { |
| this.env = env; |
| } |
| |
| |
| /** |
| * Builds a Catalina selector context using the given environment. |
| */ |
| public SelectorContext(Hashtable env, boolean initialContext) { |
| this(env); |
| this.initialContext = initialContext; |
| } |
| |
| |
| // ----------------------------------------------------- Instance Variables |
| |
| |
| /** |
| * Environment. |
| */ |
| protected Hashtable env; |
| |
| |
| /** |
| * The string manager for this package. |
| */ |
| protected StringManager sm = StringManager.getManager(Constants.Package); |
| |
| |
| /** |
| * Request for an initial context. |
| */ |
| protected boolean initialContext = false; |
| |
| |
| // --------------------------------------------------------- Public Methods |
| |
| |
| // -------------------------------------------------------- Context Methods |
| |
| |
| /** |
| * Retrieves the named object. If name is empty, returns a new instance |
| * of this context (which represents the same naming context as this |
| * context, but its environment may be modified independently and it may |
| * be accessed concurrently). |
| * |
| * @param name the name of the object to look up |
| * @return the object bound to name |
| * @exception NamingException if a naming exception is encountered |
| */ |
| public Object lookup(Name name) |
| throws NamingException { |
| // Strip the URL header |
| // Find the appropriate NamingContext according to the current bindings |
| // Execute the lookup on that context |
| return getBoundContext().lookup(parseName(name)); |
| } |
| |
| |
| /** |
| * Retrieves the named object. |
| * |
| * @param name the name of the object to look up |
| * @return the object bound to name |
| * @exception NamingException if a naming exception is encountered |
| */ |
| public Object lookup(String name) |
| throws NamingException { |
| // Strip the URL header |
| // Find the appropriate NamingContext according to the current bindings |
| // Execute the lookup on that context |
| return getBoundContext().lookup(parseName(name)); |
| } |
| |
| |
| /** |
| * Binds a name to an object. All intermediate contexts and the target |
| * context (that named by all but terminal atomic component of the name) |
| * must already exist. |
| * |
| * @param name the name to bind; may not be empty |
| * @param obj the object to bind; possibly null |
| * @exception NameAlreadyBoundException if name is already bound |
| * @exception InvalidAttributesException if object did not supply all |
| * mandatory attributes |
| * @exception NamingException if a naming exception is encountered |
| */ |
| public void bind(Name name, Object obj) |
| throws NamingException { |
| getBoundContext().bind(parseName(name), obj); |
| } |
| |
| |
| /** |
| * Binds a name to an object. |
| * |
| * @param name the name to bind; may not be empty |
| * @param obj the object to bind; possibly null |
| * @exception NameAlreadyBoundException if name is already bound |
| * @exception InvalidAttributesException if object did not supply all |
| * mandatory attributes |
| * @exception NamingException if a naming exception is encountered |
| */ |
| public void bind(String name, Object obj) |
| throws NamingException { |
| getBoundContext().bind(parseName(name), obj); |
| } |
| |
| |
| /** |
| * Binds a name to an object, overwriting any existing binding. All |
| * intermediate contexts and the target context (that named by all but |
| * terminal atomic component of the name) must already exist. |
| * <p> |
| * If the object is a DirContext, any existing attributes associated with |
| * the name are replaced with those of the object. Otherwise, any |
| * existing attributes associated with the name remain unchanged. |
| * |
| * @param name the name to bind; may not be empty |
| * @param obj the object to bind; possibly null |
| * @exception InvalidAttributesException if object did not supply all |
| * mandatory attributes |
| * @exception NamingException if a naming exception is encountered |
| */ |
| public void rebind(Name name, Object obj) |
| throws NamingException { |
| getBoundContext().rebind(parseName(name), obj); |
| } |
| |
| |
| /** |
| * Binds a name to an object, overwriting any existing binding. |
| * |
| * @param name the name to bind; may not be empty |
| * @param obj the object to bind; possibly null |
| * @exception InvalidAttributesException if object did not supply all |
| * mandatory attributes |
| * @exception NamingException if a naming exception is encountered |
| */ |
| public void rebind(String name, Object obj) |
| throws NamingException { |
| getBoundContext().rebind(parseName(name), obj); |
| } |
| |
| |
| /** |
| * Unbinds the named object. Removes the terminal atomic name in name |
| * from the target context--that named by all but the terminal atomic |
| * part of name. |
| * <p> |
| * This method is idempotent. It succeeds even if the terminal atomic |
| * name is not bound in the target context, but throws |
| * NameNotFoundException if any of the intermediate contexts do not exist. |
| * |
| * @param name the name to bind; may not be empty |
| * @exception NameNotFoundException if an intermediate context does not |
| * exist |
| * @exception NamingException if a naming exception is encountered |
| */ |
| public void unbind(Name name) |
| throws NamingException { |
| getBoundContext().unbind(parseName(name)); |
| } |
| |
| |
| /** |
| * Unbinds the named object. |
| * |
| * @param name the name to bind; may not be empty |
| * @exception NameNotFoundException if an intermediate context does not |
| * exist |
| * @exception NamingException if a naming exception is encountered |
| */ |
| public void unbind(String name) |
| throws NamingException { |
| getBoundContext().unbind(parseName(name)); |
| } |
| |
| |
| /** |
| * Binds a new name to the object bound to an old name, and unbinds the |
| * old name. Both names are relative to this context. Any attributes |
| * associated with the old name become associated with the new name. |
| * Intermediate contexts of the old name are not changed. |
| * |
| * @param oldName the name of the existing binding; may not be empty |
| * @param newName the name of the new binding; may not be empty |
| * @exception NameAlreadyBoundException if newName is already bound |
| * @exception NamingException if a naming exception is encountered |
| */ |
| public void rename(Name oldName, Name newName) |
| throws NamingException { |
| getBoundContext().rename(parseName(oldName), parseName(newName)); |
| } |
| |
| |
| /** |
| * Binds a new name to the object bound to an old name, and unbinds the |
| * old name. |
| * |
| * @param oldName the name of the existing binding; may not be empty |
| * @param newName the name of the new binding; may not be empty |
| * @exception NameAlreadyBoundException if newName is already bound |
| * @exception NamingException if a naming exception is encountered |
| */ |
| public void rename(String oldName, String newName) |
| throws NamingException { |
| getBoundContext().rename(parseName(oldName), parseName(newName)); |
| } |
| |
| |
| /** |
| * Enumerates the names bound in the named context, along with the class |
| * names of objects bound to them. The contents of any subcontexts are |
| * not included. |
| * <p> |
| * If a binding is added to or removed from this context, its effect on |
| * an enumeration previously returned is undefined. |
| * |
| * @param name the name of the context to list |
| * @return an enumeration of the names and class names of the bindings in |
| * this context. Each element of the enumeration is of type NameClassPair. |
| * @exception NamingException if a naming exception is encountered |
| */ |
| public NamingEnumeration list(Name name) |
| throws NamingException { |
| return getBoundContext().list(parseName(name)); |
| } |
| |
| |
| /** |
| * Enumerates the names bound in the named context, along with the class |
| * names of objects bound to them. |
| * |
| * @param name the name of the context to list |
| * @return an enumeration of the names and class names of the bindings in |
| * this context. Each element of the enumeration is of type NameClassPair. |
| * @exception NamingException if a naming exception is encountered |
| */ |
| public NamingEnumeration list(String name) |
| throws NamingException { |
| return getBoundContext().list(parseName(name)); |
| } |
| |
| |
| /** |
| * Enumerates the names bound in the named context, along with the |
| * objects bound to them. The contents of any subcontexts are not |
| * included. |
| * <p> |
| * If a binding is added to or removed from this context, its effect on |
| * an enumeration previously returned is undefined. |
| * |
| * @param name the name of the context to list |
| * @return an enumeration of the bindings in this context. |
| * Each element of the enumeration is of type Binding. |
| * @exception NamingException if a naming exception is encountered |
| */ |
| public NamingEnumeration listBindings(Name name) |
| throws NamingException { |
| return getBoundContext().listBindings(parseName(name)); |
| } |
| |
| |
| /** |
| * Enumerates the names bound in the named context, along with the |
| * objects bound to them. |
| * |
| * @param name the name of the context to list |
| * @return an enumeration of the bindings in this context. |
| * Each element of the enumeration is of type Binding. |
| * @exception NamingException if a naming exception is encountered |
| */ |
| public NamingEnumeration listBindings(String name) |
| throws NamingException { |
| return getBoundContext().listBindings(parseName(name)); |
| } |
| |
| |
| /** |
| * Destroys the named context and removes it from the namespace. Any |
| * attributes associated with the name are also removed. Intermediate |
| * contexts are not destroyed. |
| * <p> |
| * This method is idempotent. It succeeds even if the terminal atomic |
| * name is not bound in the target context, but throws |
| * NameNotFoundException if any of the intermediate contexts do not exist. |
| * |
| * In a federated naming system, a context from one naming system may be |
| * bound to a name in another. One can subsequently look up and perform |
| * operations on the foreign context using a composite name. However, an |
| * attempt destroy the context using this composite name will fail with |
| * NotContextException, because the foreign context is not a "subcontext" |
| * of the context in which it is bound. Instead, use unbind() to remove |
| * the binding of the foreign context. Destroying the foreign context |
| * requires that the destroySubcontext() be performed on a context from |
| * the foreign context's "native" naming system. |
| * |
| * @param name the name of the context to be destroyed; may not be empty |
| * @exception NameNotFoundException if an intermediate context does not |
| * exist |
| * @exception NotContextException if the name is bound but does not name |
| * a context, or does not name a context of the appropriate type |
| */ |
| public void destroySubcontext(Name name) |
| throws NamingException { |
| getBoundContext().destroySubcontext(parseName(name)); |
| } |
| |
| |
| /** |
| * Destroys the named context and removes it from the namespace. |
| * |
| * @param name the name of the context to be destroyed; may not be empty |
| * @exception NameNotFoundException if an intermediate context does not |
| * exist |
| * @exception NotContextException if the name is bound but does not name |
| * a context, or does not name a context of the appropriate type |
| */ |
| public void destroySubcontext(String name) |
| throws NamingException { |
| getBoundContext().destroySubcontext(parseName(name)); |
| } |
| |
| |
| /** |
| * Creates and binds a new context. Creates a new context with the given |
| * name and binds it in the target context (that named by all but |
| * terminal atomic component of the name). All intermediate contexts and |
| * the target context must already exist. |
| * |
| * @param name the name of the context to create; may not be empty |
| * @return the newly created context |
| * @exception NameAlreadyBoundException if name is already bound |
| * @exception InvalidAttributesException if creation of the subcontext |
| * requires specification of mandatory attributes |
| * @exception NamingException if a naming exception is encountered |
| */ |
| public Context createSubcontext(Name name) |
| throws NamingException { |
| return getBoundContext().createSubcontext(parseName(name)); |
| } |
| |
| |
| /** |
| * Creates and binds a new context. |
| * |
| * @param name the name of the context to create; may not be empty |
| * @return the newly created context |
| * @exception NameAlreadyBoundException if name is already bound |
| * @exception InvalidAttributesException if creation of the subcontext |
| * requires specification of mandatory attributes |
| * @exception NamingException if a naming exception is encountered |
| */ |
| public Context createSubcontext(String name) |
| throws NamingException { |
| return getBoundContext().createSubcontext(parseName(name)); |
| } |
| |
| |
| /** |
| * Retrieves the named object, following links except for the terminal |
| * atomic component of the name. If the object bound to name is not a |
| * link, returns the object itself. |
| * |
| * @param name the name of the object to look up |
| * @return the object bound to name, not following the terminal link |
| * (if any). |
| * @exception NamingException if a naming exception is encountered |
| */ |
| public Object lookupLink(Name name) |
| throws NamingException { |
| return getBoundContext().lookupLink(parseName(name)); |
| } |
| |
| |
| /** |
| * Retrieves the named object, following links except for the terminal |
| * atomic component of the name. |
| * |
| * @param name the name of the object to look up |
| * @return the object bound to name, not following the terminal link |
| * (if any). |
| * @exception NamingException if a naming exception is encountered |
| */ |
| public Object lookupLink(String name) |
| throws NamingException { |
| return getBoundContext().lookupLink(parseName(name)); |
| } |
| |
| |
| /** |
| * Retrieves the parser associated with the named context. In a |
| * federation of namespaces, different naming systems will parse names |
| * differently. This method allows an application to get a parser for |
| * parsing names into their atomic components using the naming convention |
| * of a particular naming system. Within any single naming system, |
| * NameParser objects returned by this method must be equal (using the |
| * equals() test). |
| * |
| * @param name the name of the context from which to get the parser |
| * @return a name parser that can parse compound names into their atomic |
| * components |
| * @exception NamingException if a naming exception is encountered |
| */ |
| public NameParser getNameParser(Name name) |
| throws NamingException { |
| return getBoundContext().getNameParser(parseName(name)); |
| } |
| |
| |
| /** |
| * Retrieves the parser associated with the named context. |
| * |
| * @param name the name of the context from which to get the parser |
| * @return a name parser that can parse compound names into their atomic |
| * components |
| * @exception NamingException if a naming exception is encountered |
| */ |
| public NameParser getNameParser(String name) |
| throws NamingException { |
| return getBoundContext().getNameParser(parseName(name)); |
| } |
| |
| |
| /** |
| * Composes the name of this context with a name relative to this context. |
| * <p> |
| * Given a name (name) relative to this context, and the name (prefix) |
| * of this context relative to one of its ancestors, this method returns |
| * the composition of the two names using the syntax appropriate for the |
| * naming system(s) involved. That is, if name names an object relative |
| * to this context, the result is the name of the same object, but |
| * relative to the ancestor context. None of the names may be null. |
| * |
| * @param name a name relative to this context |
| * @param prefix the name of this context relative to one of its ancestors |
| * @return the composition of prefix and name |
| * @exception NamingException if a naming exception is encountered |
| */ |
| public Name composeName(Name name, Name prefix) |
| throws NamingException { |
| prefix = (Name) name.clone(); |
| return prefix.addAll(name); |
| } |
| |
| |
| /** |
| * Composes the name of this context with a name relative to this context. |
| * |
| * @param name a name relative to this context |
| * @param prefix the name of this context relative to one of its ancestors |
| * @return the composition of prefix and name |
| * @exception NamingException if a naming exception is encountered |
| */ |
| public String composeName(String name, String prefix) |
| throws NamingException { |
| return prefix + "/" + name; |
| } |
| |
| |
| /** |
| * Adds a new environment property to the environment of this context. If |
| * the property already exists, its value is overwritten. |
| * |
| * @param propName the name of the environment property to add; may not |
| * be null |
| * @param propVal the value of the property to add; may not be null |
| * @exception NamingException if a naming exception is encountered |
| */ |
| public Object addToEnvironment(String propName, Object propVal) |
| throws NamingException { |
| return getBoundContext().addToEnvironment(propName, propVal); |
| } |
| |
| |
| /** |
| * Removes an environment property from the environment of this context. |
| * |
| * @param propName the name of the environment property to remove; |
| * may not be null |
| * @exception NamingException if a naming exception is encountered |
| */ |
| public Object removeFromEnvironment(String propName) |
| throws NamingException { |
| return getBoundContext().removeFromEnvironment(propName); |
| } |
| |
| |
| /** |
| * Retrieves the environment in effect for this context. See class |
| * description for more details on environment properties. |
| * The caller should not make any changes to the object returned: their |
| * effect on the context is undefined. The environment of this context |
| * may be changed using addToEnvironment() and removeFromEnvironment(). |
| * |
| * @return the environment of this context; never null |
| * @exception NamingException if a naming exception is encountered |
| */ |
| public Hashtable getEnvironment() |
| throws NamingException { |
| return getBoundContext().getEnvironment(); |
| } |
| |
| |
| /** |
| * Closes this context. This method releases this context's resources |
| * immediately, instead of waiting for them to be released automatically |
| * by the garbage collector. |
| * This method is idempotent: invoking it on a context that has already |
| * been closed has no effect. Invoking any other method on a closed |
| * context is not allowed, and results in undefined behaviour. |
| * |
| * @exception NamingException if a naming exception is encountered |
| */ |
| public void close() |
| throws NamingException { |
| getBoundContext().close(); |
| } |
| |
| |
| /** |
| * Retrieves the full name of this context within its own namespace. |
| * <p> |
| * Many naming services have a notion of a "full name" for objects in |
| * their respective namespaces. For example, an LDAP entry has a |
| * distinguished name, and a DNS record has a fully qualified name. This |
| * method allows the client application to retrieve this name. The string |
| * returned by this method is not a JNDI composite name and should not be |
| * passed directly to context methods. In naming systems for which the |
| * notion of full name does not make sense, |
| * OperationNotSupportedException is thrown. |
| * |
| * @return this context's name in its own namespace; never null |
| * @exception OperationNotSupportedException if the naming system does |
| * not have the notion of a full name |
| * @exception NamingException if a naming exception is encountered |
| */ |
| public String getNameInNamespace() |
| throws NamingException { |
| return prefix; |
| } |
| |
| |
| // ------------------------------------------------------ Protected Methods |
| |
| |
| /** |
| * Get the bound context. |
| */ |
| protected Context getBoundContext() |
| throws NamingException { |
| |
| if (initialContext) { |
| String ICName = IC_PREFIX; |
| if (ContextBindings.isThreadBound()) { |
| ICName += ContextBindings.getThreadName(); |
| } else if (ContextBindings.isClassLoaderBound()) { |
| ICName += ContextBindings.getClassLoaderName(); |
| } |
| Context initialContext = ContextBindings.getContext(ICName); |
| if (initialContext == null) { |
| // Allocating a new context and binding it to the appropriate |
| // name |
| initialContext = new NamingContext(env, ICName); |
| ContextBindings.bindContext(ICName, initialContext); |
| } |
| return initialContext; |
| } else { |
| if (ContextBindings.isThreadBound()) { |
| return ContextBindings.getThread(); |
| } else { |
| return ContextBindings.getClassLoader(); |
| } |
| } |
| |
| } |
| |
| |
| /** |
| * Strips the URL header. |
| * |
| * @return the parsed name |
| * @exception NamingException if there is no "java:" header or if no |
| * naming context has been bound to this thread |
| */ |
| protected String parseName(String name) |
| throws NamingException { |
| |
| if ((!initialContext) && (name.startsWith(prefix))) { |
| return (name.substring(prefixLength)); |
| } else { |
| if (initialContext) { |
| return (name); |
| } else { |
| throw new NamingException |
| (sm.getString("selectorContext.noJavaUrl")); |
| } |
| } |
| |
| } |
| |
| |
| /** |
| * Strips the URL header. |
| * |
| * @return the parsed name |
| * @exception NamingException if there is no "java:" header or if no |
| * naming context has been bound to this thread |
| */ |
| protected Name parseName(Name name) |
| throws NamingException { |
| |
| if ((!initialContext) && (!name.isEmpty()) |
| && (name.get(0).equals(prefix))) { |
| return (name.getSuffix(1)); |
| } else { |
| if (initialContext) { |
| return (name); |
| } else { |
| throw new NamingException |
| (sm.getString("selectorContext.noJavaUrl")); |
| } |
| } |
| |
| } |
| |
| |
| } |
| |
