NamingContext (Apache Tomcat 8.5.56 API Documentation)

org.apache.naming

## Class NamingContext

- java.lang.Object
- - org.apache.naming.NamingContext

- All Implemented Interfaces:
    Context

      public class NamingContext
      extends Object
      implements Context

  Catalina JNDI Context implementation.
  Author:
    Remy Maucherat

- - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `protected HashMap<String,NamingEntry>` | `bindings` Bindings in this Context.
    `protected Hashtable<String,Object>` | `env` Environment.
    `protected String` | `name` Name of the associated Catalina Context.
    `protected static NameParser` | `nameParser` Name parser for this context.
    `protected static StringManager` | `sm` The string manager for this package.

    - ### Fields inherited from interface javax.naming.Context

      `APPLET, AUTHORITATIVE, BATCHSIZE, DNS_URL, INITIAL_CONTEXT_FACTORY, LANGUAGE, OBJECT_FACTORIES, PROVIDER_URL, REFERRAL, SECURITY_AUTHENTICATION, SECURITY_CREDENTIALS, SECURITY_PRINCIPAL, SECURITY_PROTOCOL, STATE_FACTORIES, URL_PKG_PREFIXES`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `NamingContext(Hashtable<String,Object> env, String name)` Builds a naming context.
    `NamingContext(Hashtable<String,Object> env, String name, HashMap<String,NamingEntry> bindings)` Builds a naming context.

  - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `Object` | `addToEnvironment(String propName, Object propVal)` Adds a new environment property to the environment of this context.
    `void` | `bind(Name name, Object obj)` Binds a name to an object.
    `protected void` | `bind(Name name, Object obj, boolean rebind)` Binds a name to an object.
    `void` | `bind(String name, Object obj)` Binds a name to an object.
    `protected boolean` | `checkWritable()` Throws a naming exception is Context is not writable.
    `void` | `close()` Closes this context.
    `Name` | `composeName(Name name, Name prefix)` Composes the name of this context with a name relative to this context.
    `String` | `composeName(String name, String prefix)` Composes the name of this context with a name relative to this context.
    `Context` | `createSubcontext(Name name)` Creates and binds a new context.
    `Context` | `createSubcontext(String name)` Creates and binds a new context.
    `void` | `destroySubcontext(Name name)` Destroys the named context and removes it from the namespace.
    `void` | `destroySubcontext(String name)` Destroys the named context and removes it from the namespace.
    `Hashtable<?,?>` | `getEnvironment()` Retrieves the environment in effect for this context.
    `boolean` | `getExceptionOnFailedWrite()`
    `String` | `getNameInNamespace()` Retrieves the full name of this context within its own namespace.
    `NameParser` | `getNameParser(Name name)` Retrieves the parser associated with the named context.
    `NameParser` | `getNameParser(String name)` Retrieves the parser associated with the named context.
    `protected boolean` | `isWritable()`
    `NamingEnumeration<NameClassPair>` | `list(Name name)` Enumerates the names bound in the named context, along with the class names of objects bound to them.
    `NamingEnumeration<NameClassPair>` | `list(String name)` Enumerates the names bound in the named context, along with the class names of objects bound to them.
    `NamingEnumeration<Binding>` | `listBindings(Name name)` Enumerates the names bound in the named context, along with the objects bound to them.
    `NamingEnumeration<Binding>` | `listBindings(String name)` Enumerates the names bound in the named context, along with the objects bound to them.
    `Object` | `lookup(Name name)` Retrieves the named object.
    `protected Object` | `lookup(Name name, boolean resolveLinks)` Retrieves the named object.
    `Object` | `lookup(String name)` Retrieves the named object.
    `Object` | `lookupLink(Name name)` Retrieves the named object, following links except for the terminal atomic component of the name.
    `Object` | `lookupLink(String name)` Retrieves the named object, following links except for the terminal atomic component of the name.
    `void` | `rebind(Name name, Object obj)` Binds a name to an object, overwriting any existing binding.
    `void` | `rebind(String name, Object obj)` Binds a name to an object, overwriting any existing binding.
    `Object` | `removeFromEnvironment(String propName)` Removes an environment property from the environment of this context.
    `void` | `rename(Name oldName, Name newName)` Binds a new name to the object bound to an old name, and unbinds the old name.
    `void` | `rename(String oldName, String newName)` Binds a new name to the object bound to an old name, and unbinds the old name.
    `void` | `setExceptionOnFailedWrite(boolean exceptionOnFailedWrite)`
    `void` | `unbind(Name name)` Unbinds the named object.
    `void` | `unbind(String name)` Unbinds the named object.

    - ### Methods inherited from class java.lang.Object

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

- - ### Field Detail

    - #### nameParser

          protected static final NameParser nameParser

      Name parser for this context.

    - #### env

          protected final Hashtable<String,Object> env

      Environment.

    - #### sm

          protected static final StringManager sm

      The string manager for this package.

    - #### bindings

          protected final HashMap<String,NamingEntry> bindings

      Bindings in this Context.

    - #### name

          protected final String name

      Name of the associated Catalina Context.

  - ### Constructor Detail

    - #### NamingContext

          public NamingContext(Hashtable<String,Object> env,
                       String name)

      Builds a naming context.
      Parameters:
        `env` - The environment to use to construct the naming context
        `name` - The name of the associated Catalina Context

    - #### NamingContext

          public NamingContext(Hashtable<String,Object> env,
                       String name,
                       HashMap<String,NamingEntry> bindings)

      Builds a naming context.
      Parameters:
        `env` - The environment to use to construct the naming context
        `name` - The name of the associated Catalina Context
        `bindings` - The initial bindings for the naming context

  - ### Method Detail

    - #### getExceptionOnFailedWrite

          public boolean getExceptionOnFailedWrite()

    - #### setExceptionOnFailedWrite

          public void setExceptionOnFailedWrite(boolean exceptionOnFailedWrite)

    - #### lookup

          public Object lookup(Name name)
                        throws NamingException

      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).
      Specified by:
        `lookup` in interface `Context`
      Parameters:
        `name` - the name of the object to look up
      Returns:
        the object bound to name
      Throws:
        `NamingException` - if a naming exception is encountered

    - #### lookup

          public Object lookup(String name)
                        throws NamingException

      Retrieves the named object.
      Specified by:
        `lookup` in interface `Context`
      Parameters:
        `name` - the name of the object to look up
      Returns:
        the object bound to name
      Throws:
        `NamingException` - if a naming exception is encountered

    - #### bind

          public void bind(Name name,
                  Object obj)
                    throws NamingException

      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.
      Specified by:
        `bind` in interface `Context`
      Parameters:
        `name` - the name to bind; may not be empty
        `obj` - the object to bind; possibly null
      Throws:
        `NameAlreadyBoundException` - if name is already bound
        `InvalidAttributesException` - if object did not supply all mandatory attributes
        `NamingException` - if a naming exception is encountered

    - #### bind

          public void bind(String name,
                  Object obj)
                    throws NamingException

      Binds a name to an object.
      Specified by:
        `bind` in interface `Context`
      Parameters:
        `name` - the name to bind; may not be empty
        `obj` - the object to bind; possibly null
      Throws:
        `NameAlreadyBoundException` - if name is already bound
        `InvalidAttributesException` - if object did not supply all mandatory attributes
        `NamingException` - if a naming exception is encountered

    - #### rebind

          public void rebind(Name name,
                    Object obj)
                      throws NamingException

      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.

      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.

      Specified by:
        `rebind` in interface `Context`
      Parameters:
        `name` - the name to bind; may not be empty
        `obj` - the object to bind; possibly null
      Throws:
        `InvalidAttributesException` - if object did not supply all mandatory attributes
        `NamingException` - if a naming exception is encountered

    - #### rebind

          public void rebind(String name,
                    Object obj)
                      throws NamingException

      Binds a name to an object, overwriting any existing binding.
      Specified by:
        `rebind` in interface `Context`
      Parameters:
        `name` - the name to bind; may not be empty
        `obj` - the object to bind; possibly null
      Throws:
        `InvalidAttributesException` - if object did not supply all mandatory attributes
        `NamingException` - if a naming exception is encountered

    - #### unbind

          public void unbind(Name name)
                      throws NamingException

      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.

      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.

      Specified by:
        `unbind` in interface `Context`
      Parameters:
        `name` - the name to bind; may not be empty
      Throws:
        `NameNotFoundException` - if an intermediate context does not exist
        `NamingException` - if a naming exception is encountered

    - #### unbind

          public void unbind(String name)
                      throws NamingException

      Unbinds the named object.
      Specified by:
        `unbind` in interface `Context`
      Parameters:
        `name` - the name to bind; may not be empty
      Throws:
        `NameNotFoundException` - if an intermediate context does not exist
        `NamingException` - if a naming exception is encountered

    - #### rename

          public void rename(Name oldName,
                    Name newName)
                      throws NamingException

      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.
      Specified by:
        `rename` in interface `Context`
      Parameters:
        `oldName` - the name of the existing binding; may not be empty
        `newName` - the name of the new binding; may not be empty
      Throws:
        `NameAlreadyBoundException` - if newName is already bound
        `NamingException` - if a naming exception is encountered

    - #### rename

          public void rename(String oldName,
                    String newName)
                      throws NamingException

      Binds a new name to the object bound to an old name, and unbinds the old name.
      Specified by:
        `rename` in interface `Context`
      Parameters:
        `oldName` - the name of the existing binding; may not be empty
        `newName` - the name of the new binding; may not be empty
      Throws:
        `NameAlreadyBoundException` - if newName is already bound
        `NamingException` - if a naming exception is encountered

    - #### list

          public NamingEnumeration<NameClassPair> list(Name name)
                                                throws NamingException

      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.

      If a binding is added to or removed from this context, its effect on an enumeration previously returned is undefined.

      Specified by:
        `list` in interface `Context`
      Parameters:
        `name` - the name of the context to list
      Returns:
        an enumeration of the names and class names of the bindings in this context. Each element of the enumeration is of type NameClassPair.
      Throws:
        `NamingException` - if a naming exception is encountered

    - #### list

          public NamingEnumeration<NameClassPair> list(String name)
                                                throws NamingException

      Enumerates the names bound in the named context, along with the class names of objects bound to them.
      Specified by:
        `list` in interface `Context`
      Parameters:
        `name` - the name of the context to list
      Returns:
        an enumeration of the names and class names of the bindings in this context. Each element of the enumeration is of type NameClassPair.
      Throws:
        `NamingException` - if a naming exception is encountered

    - #### listBindings

          public NamingEnumeration<Binding> listBindings(Name name)
                                                  throws NamingException

      Enumerates the names bound in the named context, along with the objects bound to them. The contents of any subcontexts are not included.

      If a binding is added to or removed from this context, its effect on an enumeration previously returned is undefined.

      Specified by:
        `listBindings` in interface `Context`
      Parameters:
        `name` - the name of the context to list
      Returns:
        an enumeration of the bindings in this context. Each element of the enumeration is of type Binding.
      Throws:
        `NamingException` - if a naming exception is encountered

    - #### listBindings

          public NamingEnumeration<Binding> listBindings(String name)
                                                  throws NamingException

      Enumerates the names bound in the named context, along with the objects bound to them.
      Specified by:
        `listBindings` in interface `Context`
      Parameters:
        `name` - the name of the context to list
      Returns:
        an enumeration of the bindings in this context. Each element of the enumeration is of type Binding.
      Throws:
        `NamingException` - if a naming exception is encountered

    - #### destroySubcontext

          public void destroySubcontext(Name name)
                                 throws NamingException

      Destroys the named context and removes it from the namespace. Any attributes associated with the name are also removed. Intermediate contexts are not destroyed.

      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.

      Specified by:
        `destroySubcontext` in interface `Context`
      Parameters:
        `name` - the name of the context to be destroyed; may not be empty
      Throws:
        `NameNotFoundException` - if an intermediate context does not exist
        `NotContextException` - if the name is bound but does not name a context, or does not name a context of the appropriate type
        `NamingException`

    - #### destroySubcontext

          public void destroySubcontext(String name)
                                 throws NamingException

      Destroys the named context and removes it from the namespace.
      Specified by:
        `destroySubcontext` in interface `Context`
      Parameters:
        `name` - the name of the context to be destroyed; may not be empty
      Throws:
        `NameNotFoundException` - if an intermediate context does not exist
        `NotContextException` - if the name is bound but does not name a context, or does not name a context of the appropriate type
        `NamingException`

    - #### createSubcontext

          public Context createSubcontext(Name name)
                                   throws NamingException

      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.
      Specified by:
        `createSubcontext` in interface `Context`
      Parameters:
        `name` - the name of the context to create; may not be empty
      Returns:
        the newly created context
      Throws:
        `NameAlreadyBoundException` - if name is already bound
        `InvalidAttributesException` - if creation of the sub-context requires specification of mandatory attributes
        `NamingException` - if a naming exception is encountered

    - #### createSubcontext

          public Context createSubcontext(String name)
                                   throws NamingException

      Creates and binds a new context.
      Specified by:
        `createSubcontext` in interface `Context`
      Parameters:
        `name` - the name of the context to create; may not be empty
      Returns:
        the newly created context
      Throws:
        `NameAlreadyBoundException` - if name is already bound
        `InvalidAttributesException` - if creation of the sub-context requires specification of mandatory attributes
        `NamingException` - if a naming exception is encountered

    - #### lookupLink

          public Object lookupLink(Name name)
                            throws NamingException

      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.
      Specified by:
        `lookupLink` in interface `Context`
      Parameters:
        `name` - the name of the object to look up
      Returns:
        the object bound to name, not following the terminal link (if any).
      Throws:
        `NamingException` - if a naming exception is encountered

    - #### lookupLink

          public Object lookupLink(String name)
                            throws NamingException

      Retrieves the named object, following links except for the terminal atomic component of the name.
      Specified by:
        `lookupLink` in interface `Context`
      Parameters:
        `name` - the name of the object to look up
      Returns:
        the object bound to name, not following the terminal link (if any).
      Throws:
        `NamingException` - if a naming exception is encountered

    - #### getNameParser

          public NameParser getNameParser(Name name)
                                   throws NamingException

      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).
      Specified by:
        `getNameParser` in interface `Context`
      Parameters:
        `name` - the name of the context from which to get the parser
      Returns:
        a name parser that can parse compound names into their atomic components
      Throws:
        `NamingException` - if a naming exception is encountered

    - #### getNameParser

          public NameParser getNameParser(String name)
                                   throws NamingException

      Retrieves the parser associated with the named context.
      Specified by:
        `getNameParser` in interface `Context`
      Parameters:
        `name` - the name of the context from which to get the parser
      Returns:
        a name parser that can parse compound names into their atomic components
      Throws:
        `NamingException` - if a naming exception is encountered

    - #### composeName

          public Name composeName(Name name,
                         Name prefix)
                           throws NamingException

      Composes the name of this context with a name relative to this context.

      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.

      Specified by:
        `composeName` in interface `Context`
      Parameters:
        `name` - a name relative to this context
        `prefix` - the name of this context relative to one of its ancestors
      Returns:
        the composition of prefix and name
      Throws:
        `NamingException` - if a naming exception is encountered

    - #### composeName

          public String composeName(String name,
                           String prefix)

      Composes the name of this context with a name relative to this context.
      Specified by:
        `composeName` in interface `Context`
      Parameters:
        `name` - a name relative to this context
        `prefix` - the name of this context relative to one of its ancestors
      Returns:
        the composition of prefix and name

    - #### addToEnvironment

          public Object addToEnvironment(String propName,
                                Object propVal)

      Adds a new environment property to the environment of this context. If the property already exists, its value is overwritten.
      Specified by:
        `addToEnvironment` in interface `Context`
      Parameters:
        `propName` - the name of the environment property to add; may not be null
        `propVal` - the value of the property to add; may not be null

    - #### removeFromEnvironment

          public Object removeFromEnvironment(String propName)

      Removes an environment property from the environment of this context.
      Specified by:
        `removeFromEnvironment` in interface `Context`
      Parameters:
        `propName` - the name of the environment property to remove; may not be null

    - #### getEnvironment

          public Hashtable<?,?> getEnvironment()

      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().
      Specified by:
        `getEnvironment` in interface `Context`
      Returns:
        the environment of this context; never null

    - #### close

          public void close()
                     throws NamingException

      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.
      Specified by:
        `close` in interface `Context`
      Throws:
        `NamingException` - if a naming exception is encountered

    - #### getNameInNamespace

          public String getNameInNamespace()
                                    throws NamingException

      Retrieves the full name of this context within its own namespace.

      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.

      Specified by:
        `getNameInNamespace` in interface `Context`
      Returns:
        this context's name in its own namespace; never null
      Throws:
        `OperationNotSupportedException` - if the naming system does not have the notion of a full name
        `NamingException` - if a naming exception is encountered

    - #### lookup

          protected Object lookup(Name name,
                      boolean resolveLinks)
                           throws NamingException

      Retrieves the named object.
      Parameters:
        `name` - the name of the object to look up
        `resolveLinks` - If true, the links will be resolved
      Returns:
        the object bound to name
      Throws:
        `NamingException` - if a naming exception is encountered

    - #### bind

          protected void bind(Name name,
                  Object obj,
                  boolean rebind)
                       throws NamingException

      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.
      Parameters:
        `name` - the name to bind; may not be empty
        `obj` - the object to bind; possibly null
        `rebind` - if true, then perform a rebind (ie, overwrite)
      Throws:
        `NameAlreadyBoundException` - if name is already bound
        `InvalidAttributesException` - if object did not supply all mandatory attributes
        `NamingException` - if a naming exception is encountered

    - #### isWritable

          protected boolean isWritable()

      Returns:
        `true` if writing is allowed on this context.

    - #### checkWritable

          protected boolean checkWritable()
                                   throws NamingException

      Throws a naming exception is Context is not writable.
      Returns:
        `true` if the Context is writable
      Throws:
        `NamingException` - if the Context is not writable and `exceptionOnFailedWrite` is `true`

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