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The UnboundID LDAP SDK for Java is a fast, comprehensive, and easy-to-use Java API for communicating with LDAP directory servers and performing related tasks like reading and writing LDIF, encoding and decoding data using base64 and ASN.1 BER, and performing secure communication. This package contains the Standard Edition of the LDAP SDK, which is a complete, general-purpose library for communicating with LDAPv3 directory servers.

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/*
 * Copyright 2008-2023 Ping Identity Corporation
 * All Rights Reserved.
 */
/*
 * Copyright 2008-2023 Ping Identity Corporation
 *
 * 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.
 */
/*
 * Copyright (C) 2008-2023 Ping Identity Corporation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License (GPLv2 only)
 * or the terms of the GNU Lesser General Public License (LGPLv2.1 only)
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see .
 */
package com.unboundid.util;



import java.io.Serializable;



/**
 * This class defines an element that may be used to generate a portion of the
 * string representation of a {@link ValuePattern}.  All value pattern component
 * implementations must be completely threadsafe.
 */
@NotExtensible()
abstract class ValuePatternComponent
         implements Serializable
{
  /**
   * The serial version UID for this serializable class.
   */
  private static final long serialVersionUID = -5740038096026337244L;



  /**
   * Appends a string representation of the next value generated by this
   * component to the provided buffer.
   *
   * @param  buffer  The buffer to which the value should be appended.
   */
  abstract void append(@NotNull StringBuilder buffer);



  /**
   * Indicates whether this value pattern component may be targeted by a back
   * reference.
   *
   * @return  {@code true} if this value pattern component may be targeted by a
   *          back reference, or {@code false} if not.
   */
  abstract boolean supportsBackReference();
}