/*
 * Copyright (c) 1997-2018 Oracle and/or its affiliates. All rights reserved.
 * Copyright 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.resources;

import java.util.Hashtable;
import java.util.ResourceBundle;

import javax.naming.Binding;
import javax.naming.Context;
import javax.naming.Name;
import javax.naming.NameClassPair;
import javax.naming.NameParser;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
import javax.naming.CompositeName;
import javax.naming.directory.DirContext;
import javax.naming.directory.Attributes;
import javax.naming.directory.Attribute;
import javax.naming.directory.ModificationItem;
import javax.naming.directory.SearchControls;
import javax.naming.directory.SearchResult;
import org.apache.naming.LogFacade;
import org.apache.naming.NameParserImpl;

/**
 * Directory Context implementation helper class.
 *
 * @author Remy Maucherat
 * @version $Revision: 1.3 $ $Date: 2005/12/08 01:29:08 $
 */

public abstract class BaseDirContext implements DirContext {

    private static final ResourceBundle rb = LogFacade.getLogger().getResourceBundle();

    // ----------------------------------------------------------- Constructors


    /**
     * Builds a base directory context.
     */
    public BaseDirContext() {
        this.env = new Hashtable<String, Object>();
    }


    /**
     * Builds a base directory context using the given environment.
     */
    public BaseDirContext(Hashtable<String, Object> env) {
        this.env = env;
    }


    // ----------------------------------------------------- Instance Variables


    /**
     * The debugging detail level for this component.
     */
    protected int debug = 0;


    /**
     * The document base path.
     */
    protected String docBase = null;


    /**
     * Environment.
     */
    protected Hashtable<String, Object> env;


    /**
     * Cached.
     */
    protected boolean cached = true;


    /**
     * Cache TTL.
     */
    protected int cacheTTL = 5000; // 5s


    /**
     * Max size of resources which will have their content cached.
     */
    protected int cacheMaxSize = 10240; // 10 MB


    // ------------------------------------------------------------- Properties

    /**
     * Return the debugging detail level for this component.
     */
    public int getDebug() {
        return (this.debug);
    }


    /**
     * Set the debugging detail level for this component.
     *
     * @param debug The new debugging detail level
     */
    public void setDebug(int debug) {
        this.debug = debug;
    }


    /**
     * Return the document root for this component.
     */
    public String getDocBase() {
        return (this.docBase);
    }


    /**
     * Set the document root for this component.
     *
     * @param docBase The new document root
     * @exception IllegalArgumentException if the specified value is not
     *                supported by this implementation
     * @exception IllegalArgumentException if this would create a
     *                malformed URL
     */
    public void setDocBase(String docBase) {
        // Validate the format of the proposed document root
        if (docBase == null) {
            throw new IllegalArgumentException(rb.getString(LogFacade.RESOURCES_NULL));
        }

        // Change the document root property
        this.docBase = docBase;
    }


    /**
     * Set cached.
     */
    public void setCached(boolean cached) {
        this.cached = cached;
    }


    /**
     * Is cached ?
     */
    public boolean isCached() {
        return cached;
    }


    /**
     * Set cache TTL.
     */
    public void setCacheTTL(int cacheTTL) {
        this.cacheTTL = cacheTTL;
    }


    /**
     * Get cache TTL.
     */
    public int getCacheTTL() {
        return cacheTTL;
    }


    /**
     * Return the maximum size of the cache in KB.
     */
    public int getCacheMaxSize() {
        return cacheMaxSize;
    }


    /**
     * Set the maximum size of the cache in KB.
     */
    public void setCacheMaxSize(int cacheMaxSize) {
        this.cacheMaxSize = cacheMaxSize;
    }


    // --------------------------------------------------------- Public Methods


    /**
     * Allocate resources for this directory context.
     */
    public void allocate() {
        // No action taken by the default implementation
    }


    /**
     * Release any resources allocated for this directory context.
     */
    public void release() {
        // No action taken by the default implementation
    }


    // -------------------------------------------------------- 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 {
        return lookup(name.toString());
    }


    /**
     * 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 abstract Object lookup(String name)
        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.
     *
     * @param name the name to bind; may not be empty
     * @param obj the object to bind; possibly null
     * @exception javax.naming.NameAlreadyBoundException if name is already
     * bound
     * @exception javax.naming.directory.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 {
        bind(name.toString(), 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 javax.naming.NameAlreadyBoundException if name is already
     * bound
     * @exception javax.naming.directory.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 {
        bind(name, obj, null);
    }


    /**
     * 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 javax.naming.directory.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 {
        rebind(name.toString(), 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 javax.naming.directory.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 {
        rebind(name, obj, null);
    }


    /**
     * 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 javax.naming.NameNotFoundException if an intermediate
     * context does not exist
     * @exception NamingException if a naming exception is encountered
     */
    public void unbind(Name name)
        throws NamingException {
        unbind(name.toString());
    }


    /**
     * Unbinds the named object.
     *
     * @param name the name to bind; may not be empty
     * @exception javax.naming.NameNotFoundException if an intermediate
     * context does not exist
     * @exception NamingException if a naming exception is encountered
     */
    public abstract void unbind(String name)
        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.
     *
     * @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 javax.naming.NameAlreadyBoundException if newName is already
     * bound
     * @exception NamingException if a naming exception is encountered
     */
    public void rename(Name oldName, Name newName)
        throws NamingException {
        rename(oldName.toString(), newName.toString());
    }


    /**
     * 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 javax.naming.NameAlreadyBoundException if newName is already
     * bound
     * @exception NamingException if a naming exception is encountered
     */
    public abstract void rename(String oldName, String newName)
        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.
     * <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<NameClassPair> list(Name name)
        throws NamingException {
        return list(name.toString());
    }


    /**
     * 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 abstract NamingEnumeration<NameClassPair> list(String 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.
     * <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<Binding> listBindings(Name name)
        throws NamingException {
        return listBindings(name.toString());
    }


    /**
     * 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 abstract NamingEnumeration<Binding> listBindings(String 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.
     * <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 javax.naming.NameNotFoundException if an intermediate context
     * does not exist
     * @exception javax.naming.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 {
        destroySubcontext(name.toString());
    }


    /**
     * 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 javax.naming.NameNotFoundException if an intermediate context
     * does not exist
     * @exception javax.naming.NotContextException if the name is bound but does
     * not name a context, or does not name a context of the appropriate type
     */
    public abstract void destroySubcontext(String 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.
     *
     * @param name the name of the context to create; may not be empty
     * @return the newly created context
     * @exception javax.naming.NameAlreadyBoundException if name is already
     * bound
     * @exception javax.naming.directory.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 createSubcontext(name.toString());
    }


    /**
     * 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 javax.naming.NameAlreadyBoundException if name is already
     * bound
     * @exception javax.naming.directory.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 createSubcontext(name, null);
    }


    /**
     * 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 lookupLink(name.toString());
    }


    /**
     * 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 abstract Object lookupLink(String 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).
     *
     * @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 new NameParserImpl();
    }


    /**
     * 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 new NameParserImpl();
    }


    /**
     * 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) prefix.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 env.put(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 env.remove(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<String, Object> getEnvironment()
        throws NamingException {
        return env;
    }


    /**
     * 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 {
        env.clear();
    }


    /**
     * 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 javax.naming.OperationNotSupportedException if the naming
     * system does not have the notion of a full name
     * @exception NamingException if a naming exception is encountered
     */
    public abstract String getNameInNamespace()
        throws NamingException;


    // ----------------------------------------------------- DirContext Methods


    /**
     * Retrieves all of the attributes associated with a named object.
     *
     * @return the set of attributes associated with name.
     * Returns an empty attribute set if name has no attributes; never null.
     * @param name the name of the object from which to retrieve attributes
     * @exception NamingException if a naming exception is encountered
     */
    public Attributes getAttributes(Name name)
        throws NamingException {
        return getAttributes(name.toString());
    }


    /**
     * Retrieves all of the attributes associated with a named object.
     *
     * @return the set of attributes associated with name
     * @param name the name of the object from which to retrieve attributes
     * @exception NamingException if a naming exception is encountered
     */
    public Attributes getAttributes(String name)
        throws NamingException {
        return getAttributes(name, null);
    }


    /**
     * Retrieves selected attributes associated with a named object.
     * See the class description regarding attribute models, attribute type
     * names, and operational attributes.
     *
     * @return the requested attributes; never null
     * @param name the name of the object from which to retrieve attributes
     * @param attrIds the identifiers of the attributes to retrieve. null
     * indicates that all attributes should be retrieved; an empty array
     * indicates that none should be retrieved
     * @exception NamingException if a naming exception is encountered
     */
    public Attributes getAttributes(Name name, String[] attrIds)
        throws NamingException {
        return getAttributes(name.toString(), attrIds);
    }


    /**
     * Retrieves selected attributes associated with a named object.
     *
     * @return the requested attributes; never null
     * @param name the name of the object from which to retrieve attributes
     * @param attrIds the identifiers of the attributes to retrieve. null
     * indicates that all attributes should be retrieved; an empty array
     * indicates that none should be retrieved
     * @exception NamingException if a naming exception is encountered
     */
    public abstract Attributes getAttributes(String name, String[] attrIds)
        throws NamingException;


    /**
     * Modifies the attributes associated with a named object. The order of
     * the modifications is not specified. Where possible, the modifications
     * are performed atomically.
     *
     * @param name the name of the object whose attributes will be updated
     * @param mod_op the modification operation, one of: ADD_ATTRIBUTE,
     * REPLACE_ATTRIBUTE, REMOVE_ATTRIBUTE
     * @param attrs the attributes to be used for the modification; may not
     * be null
     * @exception javax.naming.directory.AttributeModificationException if the
     * modification cannot be completed successfully
     * @exception NamingException if a naming exception is encountered
     */
    public void modifyAttributes(Name name, int mod_op, Attributes attrs)
        throws NamingException {
        modifyAttributes(name.toString(), mod_op, attrs);
    }


    /**
     * Modifies the attributes associated with a named object.
     *
     * @param name the name of the object whose attributes will be updated
     * @param mod_op the modification operation, one of: ADD_ATTRIBUTE,
     * REPLACE_ATTRIBUTE, REMOVE_ATTRIBUTE
     * @param attrs the attributes to be used for the modification; may not
     * be null
     * @exception javax.naming.directory.AttributeModificationException if the
     * modification cannot be completed successfully
     * @exception NamingException if a naming exception is encountered
     */
    public abstract void modifyAttributes
        (String name, int mod_op, Attributes attrs)
        throws NamingException;


    /**
     * Modifies the attributes associated with a named object using an an
     * ordered list of modifications. The modifications are performed in the
     * order specified. Each modification specifies a modification operation
     * code and an attribute on which to operate. Where possible, the
     * modifications are performed atomically.
     *
     * @param name the name of the object whose attributes will be updated
     * @param mods an ordered sequence of modifications to be performed; may
     * not be null
     * @exception javax.naming.directory.AttributeModificationException if the
     * modification cannot be completed successfully
     * @exception NamingException if a naming exception is encountered
     */
    public void modifyAttributes(Name name, ModificationItem[] mods)
        throws NamingException {
        modifyAttributes(name.toString(), mods);
    }


    /**
     * Modifies the attributes associated with a named object using an an
     * ordered list of modifications.
     *
     * @param name the name of the object whose attributes will be updated
     * @param mods an ordered sequence of modifications to be performed; may
     * not be null
     * @exception javax.naming.directory.AttributeModificationException if the
     * modification cannot be completed successfully
     * @exception NamingException if a naming exception is encountered
     */
    public abstract void modifyAttributes(String name, ModificationItem[] mods)
        throws NamingException;


    /**
     * Binds a name to an object, along with associated attributes. If attrs
     * is null, the resulting binding will have the attributes associated
     * with obj if obj is a DirContext, and no attributes otherwise. If attrs
     * is non-null, the resulting binding will have attrs as its attributes;
     * any attributes associated with obj are ignored.
     *
     * @param name the name to bind; may not be empty
     * @param obj the object to bind; possibly null
     * @param attrs the attributes to associate with the binding
     * @exception javax.naming.NameAlreadyBoundException if name is already
     * bound
     * @exception javax.naming.directory.InvalidAttributesException if some
     * "mandatory" attributes of the binding are not supplied
     * @exception NamingException if a naming exception is encountered
     */
    public void bind(Name name, Object obj, Attributes attrs)
        throws NamingException {
        bind(name.toString(), obj, attrs);
    }


    /**
     * Binds a name to an object, along with associated attributes.
     *
     * @param name the name to bind; may not be empty
     * @param obj the object to bind; possibly null
     * @param attrs the attributes to associate with the binding
     * @exception javax.naming.NameAlreadyBoundException if name is already
     * bound
     * @exception javax.naming.directory.InvalidAttributesException if some
     * "mandatory" attributes of the binding are not supplied
     * @exception NamingException if a naming exception is encountered
     */
    public abstract void bind(String name, Object obj, Attributes attrs)
        throws NamingException;


    /**
     * Binds a name to an object, along with associated attributes,
     * overwriting any existing binding. If attrs is null and obj is a
     * DirContext, the attributes from obj are used. If attrs is null and obj
     * is not a DirContext, any existing attributes associated with the object
     * already bound in the directory remain unchanged. If attrs is non-null,
     * any existing attributes associated with the object already bound in
     * the directory are removed and attrs is associated with the named
     * object. If obj is a DirContext and attrs is non-null, the attributes
     * of obj are ignored.
     *
     * @param name the name to bind; may not be empty
     * @param obj the object to bind; possibly null
     * @param attrs the attributes to associate with the binding
     * @exception javax.naming.directory.InvalidAttributesException if some
     * "mandatory" attributes of the binding are not supplied
     * @exception NamingException if a naming exception is encountered
     */
    public void rebind(Name name, Object obj, Attributes attrs)
        throws NamingException {
        rebind(name.toString(), obj, attrs);
    }


    /**
     * Binds a name to an object, along with associated attributes,
     * overwriting any existing binding.
     *
     * @param name the name to bind; may not be empty
     * @param obj the object to bind; possibly null
     * @param attrs the attributes to associate with the binding
     * @exception javax.naming.directory.InvalidAttributesException if some
     * "mandatory" attributes of the binding are not supplied
     * @exception NamingException if a naming exception is encountered
     */
    public abstract void rebind(String name, Object obj, Attributes attrs)
        throws NamingException;


    /**
     * Creates and binds a new context, along with associated attributes.
     * This method creates a new subcontext with the given name, binds it in
     * the target context (that named by all but terminal atomic component of
     * the name), and associates the supplied attributes with the newly
     * created object. All intermediate and target contexts must already
     * exist. If attrs is null, this method is equivalent to
     * Context.createSubcontext().
     *
     * @param name the name of the context to create; may not be empty
     * @param attrs the attributes to associate with the newly created context
     * @return the newly created context
     * @exception javax.naming.NameAlreadyBoundException if the name is already
     * bound
     * @exception javax.naming.directory.InvalidAttributesException if attrs
     * does not contain all the mandatory attributes required for creation
     * @exception NamingException if a naming exception is encountered
     */
    public DirContext createSubcontext(Name name, Attributes attrs)
        throws NamingException {
        return createSubcontext(name.toString(), attrs);
    }


    /**
     * Creates and binds a new context, along with associated attributes.
     *
     * @param name the name of the context to create; may not be empty
     * @param attrs the attributes to associate with the newly created context
     * @return the newly created context
     * @exception javax.naming.NameAlreadyBoundException if the name is already
     * bound
     * @exception javax.naming.directory.InvalidAttributesException if attrs
     * does not contain all the mandatory attributes required for creation
     * @exception NamingException if a naming exception is encountered
     */
    public abstract DirContext createSubcontext(String name, Attributes attrs)
        throws NamingException;


    /**
     * Retrieves the schema associated with the named object. The schema
     * describes rules regarding the structure of the namespace and the
     * attributes stored within it. The schema specifies what types of
     * objects can be added to the directory and where they can be added;
     * what mandatory and optional attributes an object can have. The range
     * of support for schemas is directory-specific.
     *
     * @param name the name of the object whose schema is to be retrieved
     * @return the schema associated with the context; never null
     * @exception javax.naming.OperationNotSupportedException if schema not
     * supported
     * @exception NamingException if a naming exception is encountered
     */
    public DirContext getSchema(Name name)
        throws NamingException {
        return getSchema(name.toString());
    }


    /**
     * Retrieves the schema associated with the named object.
     *
     * @param name the name of the object whose schema is to be retrieved
     * @return the schema associated with the context; never null
     * @exception javax.naming.OperationNotSupportedException if schema not
     * supported
     * @exception NamingException if a naming exception is encountered
     */
    public abstract DirContext getSchema(String name)
        throws NamingException;


    /**
     * Retrieves a context containing the schema objects of the named
     * object's class definitions.
     *
     * @param name the name of the object whose object class definition is to
     * be retrieved
     * @return the DirContext containing the named object's class
     * definitions; never null
     * @exception javax.naming.OperationNotSupportedException if schema not
     * supported
     * @exception NamingException if a naming exception is encountered
     */
    public DirContext getSchemaClassDefinition(Name name)
        throws NamingException {
        return getSchemaClassDefinition(name.toString());
    }


    /**
     * Retrieves a context containing the schema objects of the named
     * object's class definitions.
     *
     * @param name the name of the object whose object class definition is to
     * be retrieved
     * @return the DirContext containing the named object's class
     * definitions; never null
     * @exception javax.naming.OperationNotSupportedException if schema not
     * supported
     * @exception NamingException if a naming exception is encountered
     */
    public abstract DirContext getSchemaClassDefinition(String name)
        throws NamingException;


    /**
     * Searches in a single context for objects that contain a specified set
     * of attributes, and retrieves selected attributes. The search is
     * performed using the default SearchControls settings.
     *
     * @param name the name of the context to search
     * @param matchingAttributes the attributes to search for. If empty or
     * null, all objects in the target context are returned.
     * @param attributesToReturn the attributes to return. null indicates
     * that all attributes are to be returned; an empty array indicates that
     * none are to be returned.
     * @return a non-null enumeration of SearchResult objects. Each
     * SearchResult contains the attributes identified by attributesToReturn
     * and the name of the corresponding object, named relative to the
     * context named by name.
     * @exception NamingException if a naming exception is encountered
     */
    public NamingEnumeration<SearchResult> search(Name name,
            Attributes matchingAttributes, String[] attributesToReturn)
        throws NamingException {
        return search(name.toString(), matchingAttributes, attributesToReturn);
    }


    /**
     * Searches in a single context for objects that contain a specified set
     * of attributes, and retrieves selected attributes.
     *
     * @param name the name of the context to search
     * @param matchingAttributes the attributes to search for. If empty or
     * null, all objects in the target context are returned.
     * @param attributesToReturn the attributes to return. null indicates
     * that all attributes are to be returned; an empty array indicates that
     * none are to be returned.
     * @return a non-null enumeration of SearchResult objects. Each
     * SearchResult contains the attributes identified by attributesToReturn
     * and the name of the corresponding object, named relative to the
     * context named by name.
     * @exception NamingException if a naming exception is encountered
     */
    public abstract NamingEnumeration<SearchResult> search
        (String name, Attributes matchingAttributes,
         String[] attributesToReturn)
        throws NamingException;


    /**
     * Searches in a single context for objects that contain a specified set
     * of attributes. This method returns all the attributes of such objects.
     * It is equivalent to supplying null as the atributesToReturn parameter
     * to the method search(Name, Attributes, String[]).
     *
     * @param name the name of the context to search
     * @param matchingAttributes the attributes to search for. If empty or
     * null, all objects in the target context are returned.
     * @return a non-null enumeration of SearchResult objects. Each
     * SearchResult contains the attributes identified by attributesToReturn
     * and the name of the corresponding object, named relative to the
     * context named by name.
     * @exception NamingException if a naming exception is encountered
     */
    public NamingEnumeration<SearchResult> search(Name name,
            Attributes matchingAttributes) throws NamingException {
        return search(name.toString(), matchingAttributes);
    }


    /**
     * Searches in a single context for objects that contain a specified set
     * of attributes.
     *
     * @param name the name of the context to search
     * @param matchingAttributes the attributes to search for. If empty or
     * null, all objects in the target context are returned.
     * @return a non-null enumeration of SearchResult objects. Each
     * SearchResult contains the attributes identified by attributesToReturn
     * and the name of the corresponding object, named relative to the
     * context named by name.
     * @exception NamingException if a naming exception is encountered
     */
    public abstract NamingEnumeration<SearchResult> search
        (String name, Attributes matchingAttributes)
        throws NamingException;


    /**
     * Searches in the named context or object for entries that satisfy the
     * given search filter. Performs the search as specified by the search
     * controls.
     *
     * @param name the name of the context or object to search
     * @param filter the filter expression to use for the search; may not be
     * null
     * @param cons the search controls that control the search. If null,
     * the default search controls are used (equivalent to
     * (new SearchControls())).
     * @return an enumeration of SearchResults of the objects that satisfy
     * the filter; never null
     * @exception javax.naming.directory.InvalidSearchFilterException if the
     * search filter specified is not supported or understood by the underlying directory
     * @exception javax.naming.directory.InvalidSearchControlsException if the
     * search controls contain invalid settings
     * @exception NamingException if a naming exception is encountered
     */
    public NamingEnumeration<SearchResult> search
        (Name name, String filter, SearchControls cons)
        throws NamingException {
        return search(name.toString(), filter, cons);
    }


    /**
     * Searches in the named context or object for entries that satisfy the
     * given search filter. Performs the search as specified by the search
     * controls.
     *
     * @param name the name of the context or object to search
     * @param filter the filter expression to use for the search; may not be
     * null
     * @param cons the search controls that control the search. If null,
     * the default search controls are used (equivalent to
     * (new SearchControls())).
     * @return an enumeration of SearchResults of the objects that satisfy
     * the filter; never null
     * @exception javax.naming.directory.InvalidSearchFilterException if the
     * search filter specified is not supported or understood by the underlying directory
     * @exception javax.naming.directory.InvalidSearchControlsException if the
     * search controls contain invalid settings
     * @exception NamingException if a naming exception is encountered
     */
    public abstract NamingEnumeration<SearchResult> search(String name, String filter,
                                             SearchControls cons)
        throws NamingException;


    /**
     * Searches in the named context or object for entries that satisfy the
     * given search filter. Performs the search as specified by the search
     * controls.
     *
     * @param name the name of the context or object to search
     * @param filterExpr the filter expression to use for the search.
     * The expression may contain variables of the form "{i}" where i is a
     * nonnegative integer. May not be null.
     * @param filterArgs the array of arguments to substitute for the
     * variables in filterExpr. The value of filterArgs[i] will replace each
     * occurrence of "{i}". If null, equivalent to an empty array.
     * @param cons the search controls that control the search. If null, the
     * default search controls are used (equivalent to (new SearchControls())).
     * @return an enumeration of SearchResults of the objects that satisy the
     * filter; never null
     * @exception ArrayIndexOutOfBoundsException if filterExpr contains {i}
     * expressions where i is outside the bounds of the array filterArgs
     * @exception javax.naming.directory.InvalidSearchControlsException if cons
     * contains invalid settings
     * @exception javax.naming.directory.InvalidSearchFilterException if
     * filterExpr with filterArgs represents an invalid search filter
     * @exception NamingException if a naming exception is encountered
     */
    public NamingEnumeration<SearchResult> search(Name name, String filterExpr,
                                    Object[] filterArgs, SearchControls cons)
        throws NamingException {
        return search(name.toString(), filterExpr, filterArgs, cons);
    }


    /**
     * Searches in the named context or object for entries that satisfy the
     * given search filter. Performs the search as specified by the search
     * controls.
     *
     * @param name the name of the context or object to search
     * @param filterExpr the filter expression to use for the search.
     * The expression may contain variables of the form "{i}" where i is a
     * nonnegative integer. May not be null.
     * @param filterArgs the array of arguments to substitute for the
     * variables in filterExpr. The value of filterArgs[i] will replace each
     * occurrence of "{i}". If null, equivalent to an empty array.
     * @param cons the search controls that control the search. If null, the
     * default search controls are used (equivalent to (new SearchControls())).
     * @return an enumeration of SearchResults of the objects that satisy the
     * filter; never null
     * @exception ArrayIndexOutOfBoundsException if filterExpr contains {i}
     * expressions where i is outside the bounds of the array filterArgs
     * @exception javax.naming.directory.InvalidSearchControlsException if cons
     * contains invalid settings
     * @exception javax.naming.directory.InvalidSearchFilterException if
     * filterExpr with filterArgs represents an invalid search filter
     * @exception NamingException if a naming exception is encountered
     */
    public abstract NamingEnumeration<SearchResult> search
        (String name, String filterExpr,
         Object[] filterArgs, SearchControls cons)
        throws NamingException;


    // ------------------------------------------------------ Protected Methods
}