001/* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * https://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, 013 * software distributed under the License is distributed on an 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 * KIND, either express or implied. See the License for the 016 * specific language governing permissions and limitations 017 * under the License. 018 */ 019package org.apache.bcel.util; 020 021import java.util.Map; 022import java.util.concurrent.ConcurrentHashMap; 023 024/** 025 * This repository is used in situations where a Class is created outside the realm of a ClassLoader. Classes are loaded 026 * from the file systems using the paths specified in the given class path. By default, this is the value returned by 027 * ClassPath.getClassPath(). 028 * <p> 029 * This repository uses a factory design, allowing it to maintain a collection of different classpaths, and as such It 030 * is designed to be used as a singleton per classpath. 031 * </p> 032 * 033 * @see org.apache.bcel.Repository 034 */ 035public class SyntheticRepository extends MemorySensitiveClassPathRepository { 036 037 private static final Map<ClassPath, SyntheticRepository> MAP = new ConcurrentHashMap<>(); // CLASSPATH X REPOSITORY 038 039 public static SyntheticRepository getInstance() { 040 return getInstance(ClassPath.SYSTEM_CLASS_PATH); 041 } 042 043 public static SyntheticRepository getInstance(final ClassPath classPath) { 044 return MAP.computeIfAbsent(classPath, SyntheticRepository::new); 045 } 046 047 private SyntheticRepository(final ClassPath path) { 048 super(path); 049 } 050}