The InitialLdapContext.java Java example source code
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package javax.naming.ldap;
import javax.naming.*;
import javax.naming.directory.*;
import java.util.Hashtable;
/**
* This class is the starting context for performing
* LDAPv3-style extended operations and controls.
*<p>
* See <tt>javax.naming.InitialContext and
* <tt>javax.naming.InitialDirContext for details on synchronization,
* and the policy for how an initial context is created.
*
* <h1>Request Controls
* When you create an initial context (<tt>InitialLdapContext),
* you can specify a list of request controls.
* These controls will be used as the request controls for any
* implicit LDAP "bind" operation performed by the context or contexts
* derived from the context. These are called <em>connection request controls.
* Use <tt>getConnectControls() to get a context's connection request
* controls.
*<p>
* The request controls supplied to the initial context constructor
* are <em>not used as the context request controls
* for subsequent context operations such as searches and lookups.
* Context request controls are set and updated by using
* <tt>setRequestControls().
*<p>
* As shown, there can be two different sets of request controls
* associated with a context: connection request controls and context
* request controls.
* This is required for those applications needing to send critical
* controls that might not be applicable to both the context operation and
* any implicit LDAP "bind" operation.
* A typical user program would do the following:
*<blockquote> * InitialLdapContext lctx = new InitialLdapContext(env, critConnCtls);
* lctx.setRequestControls(critModCtls);
* lctx.modifyAttributes(name, mods);
* Controls[] respCtls = lctx.getResponseControls();
*</pre>
* It specifies first the critical controls for creating the initial context
* (<tt>critConnCtls), and then sets the context's request controls
* (<tt>critModCtls) for the context operation. If for some reason
* <tt>lctx needs to reconnect to the server, it will use
* <tt>critConnCtls. See the LdapContext interface for
* more discussion about request controls.
*<p>
* Service provider implementors should read the "Service Provider" section
* in the <tt>LdapContext class description for implementation details.
*
* @author Rosanna Lee
* @author Scott Seligman
* @author Vincent Ryan
*
* @see LdapContext
* @see javax.naming.InitialContext
* @see javax.naming.directory.InitialDirContext
* @see javax.naming.spi.NamingManager#setInitialContextFactoryBuilder
* @since 1.3
*/
public class InitialLdapContext extends InitialDirContext implements LdapContext {
private static final String
BIND_CONTROLS_PROPERTY = "java.naming.ldap.control.connect";
/**
* Constructs an initial context using no environment properties or
* connection request controls.
* Equivalent to <tt>new InitialLdapContext(null, null).
*
* @throws NamingException if a naming exception is encountered
*/
public InitialLdapContext() throws NamingException {
super(null);
}
/**
* Constructs an initial context
* using environment properties and connection request controls.
* See <tt>javax.naming.InitialContext for a discussion of
* environment properties.
*
* <p> This constructor will not modify its parameters or
* save references to them, but may save a clone or copy.
* Caller should not modify mutable keys and values in
* <tt>environment after it has been passed to the constructor.
*
* <p> connCtls is used as the underlying context instance's
* connection request controls. See the class description
* for details.
*
* @param environment
* environment used to create the initial DirContext.
* Null indicates an empty environment.
* @param connCtls
* connection request controls for the initial context.
* If null, no connection request controls are used.
*
* @throws NamingException if a naming exception is encountered
*
* @see #reconnect
* @see LdapContext#reconnect
*/
@SuppressWarnings("unchecked")
public InitialLdapContext(Hashtable<?,?> environment,
Control[] connCtls)
throws NamingException {
super(true); // don't initialize yet
// Clone environment since caller owns it.
Hashtable<Object,Object> env = (environment == null)
? new Hashtable<>(11)
: (Hashtable<Object,Object>)environment.clone();
// Put connect controls into environment. Copy them first since
// caller owns the array.
if (connCtls != null) {
Control[] copy = new Control[connCtls.length];
System.arraycopy(connCtls, 0, copy, 0, connCtls.length);
env.put(BIND_CONTROLS_PROPERTY, copy);
}
// set version to LDAPv3
env.put("java.naming.ldap.version", "3");
// Initialize with updated environment
init(env);
}
/**
* Retrieves the initial LDAP context.
*
* @return The non-null cached initial context.
* @exception NotContextException If the initial context is not an
* instance of <tt>LdapContext.
* @exception NamingException If a naming exception was encountered.
*/
private LdapContext getDefaultLdapInitCtx() throws NamingException{
Context answer = getDefaultInitCtx();
if (!(answer instanceof LdapContext)) {
if (answer == null) {
throw new NoInitialContextException();
} else {
throw new NotContextException(
"Not an instance of LdapContext");
}
}
return (LdapContext)answer;
}
// LdapContext methods
// Most Javadoc is deferred to the LdapContext interface.
public ExtendedResponse extendedOperation(ExtendedRequest request)
throws NamingException {
return getDefaultLdapInitCtx().extendedOperation(request);
}
public LdapContext newInstance(Control[] reqCtls)
throws NamingException {
return getDefaultLdapInitCtx().newInstance(reqCtls);
}
public void reconnect(Control[] connCtls) throws NamingException {
getDefaultLdapInitCtx().reconnect(connCtls);
}
public Control[] getConnectControls() throws NamingException {
return getDefaultLdapInitCtx().getConnectControls();
}
public void setRequestControls(Control[] requestControls)
throws NamingException {
getDefaultLdapInitCtx().setRequestControls(requestControls);
}
public Control[] getRequestControls() throws NamingException {
return getDefaultLdapInitCtx().getRequestControls();
}
public Control[] getResponseControls() throws NamingException {
return getDefaultLdapInitCtx().getResponseControls();
}
}
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