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* published by the Free Software Foundation. Oracle designates this
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*
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* accompanied this code).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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*/
/**
* This class is the starting context for performing naming operations.
*<p>
* All naming operations are relative to a context.
* The initial context implements the Context interface and
* provides the starting point for resolution of names.
*<p>
* <a name=ENVIRONMENT></a>
* When the initial context is constructed, its environment
* is initialized with properties defined in the environment parameter
* passed to the constructor, and in any
* <a href=Context.html#RESOURCEFILES>application resource files</a>.
* In addition, a small number of standard JNDI properties may
* be specified as system properties or as applet parameters
* (through the use of {@link Context#APPLET}).
* These special properties are listed in the field detail sections of the
* <a href=Context.html#field_detail><tt>Context</tt></a> and
* <a href=ldap/LdapContext.html#field_detail><tt>LdapContext</tt></a>
* interface documentation.
*<p>
* JNDI determines each property's value by merging
* the values from the following two sources, in order:
* <ol>
* <li>
* The first occurrence of the property from the constructor's
* environment parameter and (for appropriate properties) the applet
* parameters and system properties.
* <li>
* The application resource files (<tt>jndi.properties</tt>).
* </ol>
* For each property found in both of these two sources, or in
* more than one application resource file, the property's value
* is determined as follows. If the property is
* one of the standard JNDI properties that specify a list of JNDI
* factories (see <a href=Context.html#LISTPROPS><tt>Context</tt></a>),
* all of the values are
* concatenated into a single colon-separated list. For other
* properties, only the first value found is used.
*
*<p>
* The initial context implementation is determined at runtime.
* The default policy uses the environment property
* "{@link Context#INITIAL_CONTEXT_FACTORY java.naming.factory.initial}",
* which contains the class name of the initial context factory.
* An exception to this policy is made when resolving URL strings, as described
* below.
*<p>
* When a URL string (a <tt>String</tt> of the form
* <em>scheme_id:rest_of_name</em>) is passed as a name parameter to
* any method, a URL context factory for handling that scheme is
* located and used to resolve the URL. If no such factory is found,
* the initial context specified by
* <tt>"java.naming.factory.initial"</tt> is used. Similarly, when a
* <tt>CompositeName</tt> object whose first component is a URL string is
* passed as a name parameter to any method, a URL context factory is
* located and used to resolve the first name component.
* See {@link NamingManager#getURLContext
* <tt>NamingManager.getURLContext()</tt>} for a description of how URL
* context factories are located.
*<p>
* This default policy of locating the initial context and URL context
* factories may be overridden
* by calling
* <tt>NamingManager.setInitialContextFactoryBuilder()</tt>.
*<p>
* NoInitialContextException is thrown when an initial context cannot
* be instantiated. This exception can be thrown during any interaction
* with the InitialContext, not only when the InitialContext is constructed.
* For example, the implementation of the initial context might lazily
* retrieve the context only when actual methods are invoked on it.
* The application should not have any dependency on when the existence
* of an initial context is determined.
*<p>
* When the environment property "java.naming.factory.initial" is
* non-null, the InitialContext constructor will attempt to create the
* initial context specified therein. At that time, the initial context factory
* involved might throw an exception if a problem is encountered. However,
* it is provider implementation-dependent when it verifies and indicates
* to the users of the initial context any environment property- or
* connection- related problems. It can do so lazily--delaying until
* an operation is performed on the context, or eagerly, at the time
* the context is constructed.
*<p>
* An InitialContext instance is not synchronized against concurrent
* access by multiple threads. Multiple threads each manipulating a
* different InitialContext instance need not synchronize.
* Threads that need to access a single InitialContext instance
* concurrently should synchronize amongst themselves and provide the
* necessary locking.
*
* @author Rosanna Lee
* @author Scott Seligman
*
* @see Context
* @see NamingManager#setInitialContextFactoryBuilder
* NamingManager.setInitialContextFactoryBuilder
* @since JNDI 1.1 / Java 2 Platform, Standard Edition, v 1.3
*/
/**
* The environment associated with this InitialContext.
* It is initialized to null and is updated by the constructor
* that accepts an environment or by the <tt>init()</tt> method.
* @see #addToEnvironment
* @see #removeFromEnvironment
* @see #getEnvironment
*/
/**
* Field holding the result of calling NamingManager.getInitialContext().
* It is set by getDefaultInitCtx() the first time getDefaultInitCtx()
* is called. Subsequent invocations of getDefaultInitCtx() return
* the value of defaultInitCtx.
* @see #getDefaultInitCtx
*/
/**
* Field indicating whether the initial context has been obtained
* by calling NamingManager.getInitialContext().
* If true, its result is in <code>defaultInitCtx</code>.
*/
protected boolean gotDefault = false;
/**
* Constructs an initial context with the option of not
* initializing it. This may be used by a constructor in
* a subclass when the value of the environment parameter
* is not yet known at the time the <tt>InitialContext</tt>
* constructor is called. The subclass's constructor will
* call this constructor, compute the value of the environment,
* and then call <tt>init()</tt> before returning.
*
* @param lazy
* true means do not initialize the initial context; false
* is equivalent to calling <tt>new InitialContext()</tt>
* @throws NamingException if a naming exception is encountered
*
* @see #init(Hashtable)
* @since 1.3
*/
if (!lazy) {
}
}
/**
* Constructs an initial context.
* No environment properties are supplied.
* Equivalent to <tt>new InitialContext(null)</tt>.
*
* @throws NamingException if a naming exception is encountered
*
* @see #InitialContext(Hashtable)
*/
}
/**
* Constructs an initial context using the supplied environment.
* Environment properties are discussed in the class description.
*
* <p> This constructor will not modify <tt>environment</tt>
* or save a reference to it, but may save a clone.
* Caller should not modify mutable keys and values in
* <tt>environment</tt> after it has been passed to the constructor.
*
* @param environment
* environment used to create the initial context.
* Null indicates an empty environment.
*
* @throws NamingException if a naming exception is encountered
*/
throws NamingException
{
if (environment != null) {
}
}
/**
* Initializes the initial context using the supplied environment.
* Environment properties are discussed in the class description.
*
* <p> This method will modify <tt>environment</tt> and save
* a reference to it. The caller may no longer modify it.
*
* @param environment
* environment used to create the initial context.
* Null indicates an empty environment.
*
* @throws NamingException if a naming exception is encountered
*
* @see #InitialContext(boolean)
* @since 1.3
*/
throws NamingException
{
// user has specified initial context factory; try to get it
}
}
/**
* A static method to retrieve the named object.
* This is a shortcut method equivalent to invoking:
* <p>
* <code>
* InitialContext ic = new InitialContext();
* Object obj = ic.lookup();
* </code>
* <p> If <tt>name</tt> 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 <tt>name</tt>
* @throws NamingException if a naming exception is encountered
*
* @see #doLookup(String)
* @see #lookup(Name)
* @since 1.6
*/
throws NamingException {
}
/**
* A static method to retrieve the named object.
* See {@link #doLookup(Name)} for details.
* @param name
* the name of the object to look up
* @return the object bound to <tt>name</tt>
* @throws NamingException if a naming exception is encountered
* @since 1.6
*/
throws NamingException {
}
return null;
}
/**
* Retrieves the initial context by calling
* <code>NamingManager.getInitialContext()</code>
* and cache it in defaultInitCtx.
* Set <code>gotDefault</code> so that we know we've tried this before.
* @return The non-null cached initial context.
* @exception NoInitialContextException If cannot find an initial context.
* @exception NamingException If a naming exception was encountered.
*/
if (!gotDefault) {
gotDefault = true;
}
if (defaultInitCtx == null)
throw new NoInitialContextException();
return defaultInitCtx;
}
/**
* Retrieves a context for resolving the string name <code>name</code>.
* If <code>name</code> name is a URL string, then attempt
* to find a URL context for it. If none is found, or if
* <code>name</code> is not a URL string, then return
* <code>getDefaultInitCtx()</code>.
*<p>
* See getURLOrDefaultInitCtx(Name) for description
* of how a subclass should use this method.
* @param name The non-null name for which to get the context.
* @return A URL context for <code>name</code> or the cached
* initial context. The result cannot be null.
* @exception NoInitialContextException If cannot find an initial context.
* @exception NamingException In a naming exception is encountered.
* @see javax.naming.spi.NamingManager#getURLContext
*/
throws NamingException {
return getDefaultInitCtx();
}
return ctx;
}
}
return getDefaultInitCtx();
}
/**
* Retrieves a context for resolving <code>name</code>.
* If the first component of <code>name</code> name is a URL string,
* then attempt to find a URL context for it. If none is found, or if
* the first component of <code>name</code> is not a URL string,
* then return <code>getDefaultInitCtx()</code>.
*<p>
* When creating a subclass of InitialContext, use this method as
* follows.
* Define a new method that uses this method to get an initial
* context of the desired subclass.
* <p><blockquote><pre>
* protected XXXContext getURLOrDefaultInitXXXCtx(Name name)
* throws NamingException {
* Context answer = getURLOrDefaultInitCtx(name);
* if (!(answer instanceof XXXContext)) {
* if (answer == null) {
* throw new NoInitialContextException();
* } else {
* throw new NotContextException("Not an XXXContext");
* }
* }
* return (XXXContext)answer;
* }
* </pre></blockquote>
* When providing implementations for the new methods in the subclass,
* use this newly defined method to get the initial context.
* <p><blockquote><pre>
* public Object XXXMethod1(Name name, ...) {
* throws NamingException {
* return getURLOrDefaultInitXXXCtx(name).XXXMethod1(name, ...);
* }
* </pre></blockquote>
*
* @param name The non-null name for which to get the context.
* @return A URL context for <code>name</code> or the cached
* initial context. The result cannot be null.
* @exception NoInitialContextException If cannot find an initial context.
* @exception NamingException In a naming exception is encountered.
*
* @see javax.naming.spi.NamingManager#getURLContext
*/
throws NamingException {
return getDefaultInitCtx();
}
return ctx;
}
}
}
return getDefaultInitCtx();
}
// Context methods
// Most Javadoc is deferred to the Context interface.
}
}
}
}
}
}
}
}
}
throws NamingException
{
}
throws NamingException
{
}
throws NamingException
{
}
throws NamingException {
}
throws NamingException {
}
}
}
}
}
}
}
}
}
/**
* Composes the name of this context with a name relative to
* this context.
* Since an initial context may never be named relative
* to any context other than itself, the value of the
* <tt>prefix</tt> parameter must be an empty name (<tt>""</tt>).
*/
throws NamingException {
return name;
}
/**
* Composes the name of this context with a name relative to
* this context.
* Since an initial context may never be named relative
* to any context other than itself, the value of the
* <tt>prefix</tt> parameter must be an empty name.
*/
throws NamingException
{
}
throws NamingException {
}
throws NamingException {
}
return getDefaultInitCtx().getEnvironment();
}
if (defaultInitCtx != null) {
}
gotDefault = false;
}
return getDefaultInitCtx().getNameInNamespace();
}
};