1 /*
   2  * Copyright (c) 2016, 2017, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package jdk.experimental.bytecode;
  27 
  28 /**
  29  * Base builder.
  30  *
  31  * @param <S> the type of the symbol representation
  32  * @param <T> the type of type descriptors representation
  33  * @param <E> the type of pool entries
  34  * @param <D> the type of this builder
  35  */
  36 public class AbstractBuilder<S, T, E, D extends AbstractBuilder<S, T, E, D>> {
  37     /**
  38      * The helper to build the constant pool.
  39      */
  40     protected final PoolHelper<S, T, E> poolHelper;
  41 
  42     /**
  43      * The helper to use to manipulate type descriptors.
  44      */
  45     protected final TypeHelper<S, T> typeHelper;
  46 
  47     /**
  48      * Create a builder.
  49      *
  50      * @param poolHelper the helper to build the constant pool
  51      * @param typeHelper the helper to use to manipulate type descriptors
  52      */
  53     AbstractBuilder(PoolHelper<S, T, E> poolHelper, TypeHelper<S, T> typeHelper) {
  54         this.poolHelper = poolHelper;
  55         this.typeHelper = typeHelper;
  56     }
  57 
  58     @SuppressWarnings("unchecked")
  59     D thisBuilder() {
  60         return (D) this;
  61     }
  62 }