001/* 002 * Copyright 2019-2020 Ping Identity Corporation 003 * All Rights Reserved. 004 */ 005/* 006 * Copyright 2019-2020 Ping Identity Corporation 007 * 008 * Licensed under the Apache License, Version 2.0 (the "License"); 009 * you may not use this file except in compliance with the License. 010 * You may obtain a copy of the License at 011 * 012 * http://www.apache.org/licenses/LICENSE-2.0 013 * 014 * Unless required by applicable law or agreed to in writing, software 015 * distributed under the License is distributed on an "AS IS" BASIS, 016 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 017 * See the License for the specific language governing permissions and 018 * limitations under the License. 019 */ 020/* 021 * Copyright (C) 2019-2020 Ping Identity Corporation 022 * 023 * This program is free software; you can redistribute it and/or modify 024 * it under the terms of the GNU General Public License (GPLv2 only) 025 * or the terms of the GNU Lesser General Public License (LGPLv2.1 only) 026 * as published by the Free Software Foundation. 027 * 028 * This program is distributed in the hope that it will be useful, 029 * but WITHOUT ANY WARRANTY; without even the implied warranty of 030 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 031 * GNU General Public License for more details. 032 * 033 * You should have received a copy of the GNU General Public License 034 * along with this program; if not, see <http://www.gnu.org/licenses>. 035 */ 036package com.unboundid.ldap.sdk; 037 038 039 040import com.unboundid.util.ThreadSafety; 041import com.unboundid.util.ThreadSafetyLevel; 042 043 044 045/** 046 * This class provides a default implementation of a {@link NameResolver} that 047 * simply uses the JVM-default name resolution functionality. 048 */ 049@ThreadSafety(level= ThreadSafetyLevel.COMPLETELY_THREADSAFE) 050public final class DefaultNameResolver 051 extends NameResolver 052{ 053 /** 054 * The singleton instance of this default name resolver. 055 */ 056 private static final DefaultNameResolver INSTANCE = new DefaultNameResolver(); 057 058 059 060 /** 061 * Prevents this class from being externally instantiated. 062 */ 063 private DefaultNameResolver() 064 { 065 super(); 066 } 067 068 069 070 /** 071 * Retrieves the singleton instance of this default name resolver. 072 * 073 * @return The singleton instance of this default name resolver. 074 */ 075 public static DefaultNameResolver getInstance() 076 { 077 return INSTANCE; 078 } 079 080 081 082 /** 083 * {@inheritDoc} 084 */ 085 @Override() 086 public void toString(final StringBuilder buffer) 087 { 088 buffer.append("DefaultNameResolver()"); 089 } 090}