/*
 * @(#)InitialDirContext.java	1.6 00/02/02
 *
 * Copyright 1999, 2000 Sun Microsystems, Inc. All Rights Reserved.
 * 
 * This software is the proprietary information of Sun Microsystems, Inc.  
 * Use is subject to license terms.
 * 
 */


package javax.naming.directory;

import java.util.Hashtable;
import javax.naming.spi.NamingManager;
import javax.naming.*;

/**
 * This class is the starting context for performing 
 * directory operations. The documentation in the class description
 * of InitialContext (including those for synchronization) apply here.
 *
 *
 * @author Rosanna Lee
 * @author Scott Seligman
 * @version 1.6 00/02/02
 *
 * @see javax.naming.InitialContext
 * @since 1.3
 */

public class InitialDirContext extends InitialContext implements DirContext {

    /**
     * Constructs an initial DirContext 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>InitialDirContext</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 DirContext; false
     *		is equivalent to calling <tt>new InitialDirContext()</tt>
     * @throws	NamingException if a naming exception is encountered
     *
     * @see InitialContext#init(Hashtable)
     * @since 1.3
     */
    protected InitialDirContext(boolean lazy) throws NamingException {
	super(lazy);
    }

    /**
     * Constructs an initial DirContext.
     * No environment properties are supplied.
     * Equivalent to <tt>new InitialDirContext(null)</tt>.
     *
     * @throws	NamingException if a naming exception is encountered
     *
     * @see #InitialDirContext(Hashtable)
     */
    public InitialDirContext() throws NamingException {
	super();
    }

    /**
     * Constructs an initial DirContext using the supplied environment.
     * Environment properties are discussed in the
     * <tt>javax.naming.InitialContext</tt> class description.
     *
     * <p> This constructor will not modify <tt>environment</tt>
     * or save a reference to it, but may save a clone.
     *
     * @param environment
     *		environment used to create the initial DirContext.
     *		Null indicates an empty environment.
     *
     * @throws	NamingException if a naming exception is encountered
     */
    public InitialDirContext(Hashtable environment) throws NamingException {
	super(environment);
    }

    private DirContext getURLOrDefaultInitDirCtx(String name) 
	    throws NamingException {
	Context answer = getURLOrDefaultInitCtx(name);
	if (!(answer instanceof DirContext)) {
	    if (answer == null) {
		throw new NoInitialContextException();
	    } else {
		throw new NotContextException(
		    "Not an instance of DirContext");
	    }
	}
	return (DirContext)answer;
    }

    private DirContext getURLOrDefaultInitDirCtx(Name name) 
	    throws NamingException {
	Context answer = getURLOrDefaultInitCtx(name);
	if (!(answer instanceof DirContext)) {
	    if (answer == null) {
		throw new NoInitialContextException();
	    } else {
		throw new NotContextException(
		    "Not an instance of DirContext");
	    }
	}
	return (DirContext)answer;
    }

// DirContext methods
// Most Javadoc is deferred to the DirContext interface.

    public Attributes getAttributes(String name)
	    throws NamingException {
	return getAttributes(name, null);
    }

    public Attributes getAttributes(String name, String[] attrIds)
	    throws NamingException {
	return getURLOrDefaultInitDirCtx(name).getAttributes(name, attrIds);
    }

    public Attributes getAttributes(Name name)
	    throws NamingException {
	return getAttributes(name, null);
    }

    public Attributes getAttributes(Name name, String[] attrIds)
	    throws NamingException {
	return getURLOrDefaultInitDirCtx(name).getAttributes(name, attrIds);
    }

    public void modifyAttributes(String name, int mod_op, Attributes attrs)
	    throws NamingException {
	getURLOrDefaultInitDirCtx(name).modifyAttributes(name, mod_op, attrs);
    }

    public void modifyAttributes(Name name, int mod_op, Attributes attrs)
	    throws NamingException  {
	getURLOrDefaultInitDirCtx(name).modifyAttributes(name, mod_op, attrs);
    }

    public void modifyAttributes(String name, ModificationItem[] mods)
	    throws NamingException  {
	getURLOrDefaultInitDirCtx(name).modifyAttributes(name, mods);
    }

    public void modifyAttributes(Name name, ModificationItem[] mods)
	    throws NamingException  {
	getURLOrDefaultInitDirCtx(name).modifyAttributes(name, mods);
    }

    public void bind(String name, Object obj, Attributes attrs)
	    throws NamingException  {
	getURLOrDefaultInitDirCtx(name).bind(name, obj, attrs);
    }

    public void bind(Name name, Object obj, Attributes attrs)
	    throws NamingException  {
	getURLOrDefaultInitDirCtx(name).bind(name, obj, attrs);
    }

    public void rebind(String name, Object obj, Attributes attrs)
	    throws NamingException  {
	getURLOrDefaultInitDirCtx(name).rebind(name, obj, attrs);
    }

    public void rebind(Name name, Object obj, Attributes attrs)
	    throws NamingException  {
	getURLOrDefaultInitDirCtx(name).rebind(name, obj, attrs);
    }

    public DirContext createSubcontext(String name, Attributes attrs)
	    throws NamingException  {
	return getURLOrDefaultInitDirCtx(name).createSubcontext(name, attrs);
    }

    public DirContext createSubcontext(Name name, Attributes attrs)
	    throws NamingException  {
	return getURLOrDefaultInitDirCtx(name).createSubcontext(name, attrs);
    }

    public DirContext getSchema(String name) throws NamingException {
	return getURLOrDefaultInitDirCtx(name).getSchema(name);
    }

    public DirContext getSchema(Name name) throws NamingException {
	return getURLOrDefaultInitDirCtx(name).getSchema(name);
    }

    public DirContext getSchemaClassDefinition(String name)
	    throws NamingException {
	return getURLOrDefaultInitDirCtx(name).getSchemaClassDefinition(name);
    }

    public DirContext getSchemaClassDefinition(Name name)
	    throws NamingException {
	return getURLOrDefaultInitDirCtx(name).getSchemaClassDefinition(name);
    }

// -------------------- search operations

    public NamingEnumeration search(String name,
				    Attributes matchingAttributes)
	    throws NamingException {
	return getURLOrDefaultInitDirCtx(name).search(name, matchingAttributes);
    }

    public NamingEnumeration search(Name name,
				    Attributes matchingAttributes)
	    throws NamingException {
	return getURLOrDefaultInitDirCtx(name).search(name, matchingAttributes);
    }

    public NamingEnumeration search(String name, 
				    Attributes matchingAttributes,
				    String[] attributesToReturn)
	    throws NamingException  {
	return getURLOrDefaultInitDirCtx(name).search(name, 
						      matchingAttributes,
						      attributesToReturn);
    }

    public NamingEnumeration search(Name name, 
				    Attributes matchingAttributes,
				    String[] attributesToReturn)
	    throws NamingException  {
	return getURLOrDefaultInitDirCtx(name).search(name, 
					    matchingAttributes,
					    attributesToReturn);
    }

    public NamingEnumeration search(String name, 
				    String filter,
				    SearchControls cons)
	    throws NamingException {
	return getURLOrDefaultInitDirCtx(name).search(name, filter, cons);
    }

    public NamingEnumeration search(Name name, 
				    String filter,
				    SearchControls cons)
	    throws NamingException  {
	return getURLOrDefaultInitDirCtx(name).search(name, filter, cons);
    }

    public NamingEnumeration search(String name,
				    String filterExpr,
				    Object[] filterArgs,
				    SearchControls cons)
	    throws NamingException {
	return getURLOrDefaultInitDirCtx(name).search(name, filterExpr, 
						      filterArgs, cons);
    }

    public NamingEnumeration search(Name name,
				    String filterExpr,
				    Object[] filterArgs,
				    SearchControls cons)
	    throws NamingException  {
	return getURLOrDefaultInitDirCtx(name).search(name, filterExpr, 
						      filterArgs, cons);
    }
}