/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE
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* or https://OpenDS.dev.java.net/OpenDS.LICENSE.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE. If applicable,
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* add the following below this CDDL HEADER, with the fields enclosed
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* by brackets "[]" replaced with your own identifying information:
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* Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*
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*
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* Copyright 2009 Sun Microsystems, Inc.
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*/
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package org.opends.sdk;
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import java.util.Arrays;
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import java.util.Collections;
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import java.util.List;
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/**
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* A Search operation alias dereferencing policy as defined in RFC 4511
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* section 4.5.1.3 is used to indicate whether or not alias entries (as
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* defined in RFC 4512) are to be dereferenced during stages of a Search
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* operation. The act of dereferencing an alias includes recursively
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* dereferencing aliases that refer to aliases.
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*
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* @see <a href="http://tools.ietf.org/html/rfc4511#section-4.5.1.3">RFC
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* 4511 - Lightweight Directory Access Protocol (LDAP): The
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* Protocol </a>
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* @see <a href="http://tools.ietf.org/html/rfc4512">RFC 4512 -
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* Lightweight Directory Access Protocol (LDAP): Directory
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* Information Models </a>
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*/
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public final class DereferenceAliasesPolicy
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{
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private static final DereferenceAliasesPolicy[] ELEMENTS = new DereferenceAliasesPolicy[4];
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private static final List<DereferenceAliasesPolicy> IMMUTABLE_ELEMENTS = Collections
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.unmodifiableList(Arrays.asList(ELEMENTS));
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/**
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* Do not dereference aliases in searching or in locating the base
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* object of a Search operation.
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*/
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public static final DereferenceAliasesPolicy NEVER = register(0,
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"never");
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/**
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* While searching subordinates of the base object, dereference any
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* alias within the scope of the Search operation. Dereferenced
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* objects become the vertices of further search scopes where the
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* Search operation is also applied. If the search scope is {@code
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* WHOLE_SUBTREE}, the Search continues in the subtree(s) of any
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* dereferenced object. If the search scope is {@code SINGLE_LEVEL},
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* the search is applied to any dereferenced objects and is not
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* applied to their subordinates.
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*/
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public static final DereferenceAliasesPolicy IN_SEARCHING = register(
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1, "search");
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/**
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* Dereference aliases in locating the base object of a Search
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* operation, but not when searching subordinates of the base object.
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*/
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public static final DereferenceAliasesPolicy FINDING_BASE = register(
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2, "find");
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/**
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* Dereference aliases both in searching and in locating the base
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* object of a Search operation.
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*/
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public static final DereferenceAliasesPolicy ALWAYS = register(3,
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"always");
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/**
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* Returns the alias dereferencing policy having the specified integer
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* value as defined in RFC 4511 section 4.5.1.
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*
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* @param intValue
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* The integer value of the alias dereferencing policy.
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* @return The dereference aliases policy, or {@code null} if there
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* was no alias dereferencing policy associated with {@code
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* intValue}.
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*/
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public static DereferenceAliasesPolicy valueOf(int intValue)
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{
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if (intValue < 0 || intValue >= ELEMENTS.length)
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{
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return null;
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}
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return ELEMENTS[intValue];
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}
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/**
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* Returns an unmodifiable list containing the set of available alias
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* dereferencing policies indexed on their integer value as defined in
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* RFC 4511 section 4.5.1.
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*
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* @return An unmodifiable list containing the set of available alias
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* dereferencing policies.
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*/
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public static List<DereferenceAliasesPolicy> values()
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{
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return IMMUTABLE_ELEMENTS;
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}
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/**
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* Creates and registers a new alias dereferencing policy with the
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* application.
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*
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* @param intValue
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* The integer value of the alias dereferencing policy as
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* defined in RFC 4511 section 4.5.1.
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* @param name
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* The name of the alias dereferencing policy.
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* @return The new alias dereferencing policy.
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*/
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private static DereferenceAliasesPolicy register(int intValue,
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String name)
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{
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final DereferenceAliasesPolicy t = new DereferenceAliasesPolicy(
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intValue, name);
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ELEMENTS[intValue] = t;
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return t;
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}
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private final int intValue;
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private final String name;
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// Prevent direct instantiation.
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private DereferenceAliasesPolicy(int intValue, String name)
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{
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this.intValue = intValue;
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this.name = name;
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}
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/**
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* {@inheritDoc}
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*/
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public boolean equals(Object obj)
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{
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if (this == obj)
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{
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return true;
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}
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else if (obj instanceof DereferenceAliasesPolicy)
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{
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return this.intValue == ((DereferenceAliasesPolicy) obj).intValue;
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}
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else
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{
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return false;
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}
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}
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/**
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* {@inheritDoc}
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*/
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public int hashCode()
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{
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return intValue;
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}
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/**
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* Returns the integer value of this alias dereferencing policy as
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* defined in RFC 4511 section 4.5.1.
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*
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* @return The integer value of this alias dereferencing policy.
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*/
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public int intValue()
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{
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return intValue;
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}
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/**
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* Returns the string representation of this alias dereferencing
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* policy.
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*
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* @return The string representation of this alias dereferencing
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* policy.
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*/
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public String toString()
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{
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return name;
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}
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}
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