001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 * 017 */ 018package org.apache.bcel.util; 019 020import java.util.HashMap; 021import java.util.Map; 022 023/** 024 * This repository is used in situations where a Class is created outside the realm of a ClassLoader. Classes are loaded from the file systems using the paths 025 * specified in the given class path. By default, this is the value returned by ClassPath.getClassPath(). <br> 026 * This repository uses a factory design, allowing it to maintain a collection of different classpaths, and as such It is designed to be used as a singleton per 027 * classpath. 028 * 029 * @see org.apache.bcel.Repository 030 * 031 * @version $Id: SyntheticRepository.java 1748124 2016-06-13 08:02:16Z ggregory $ 032 */ 033public class SyntheticRepository extends MemorySensitiveClassPathRepository { 034 035 // private static final String DEFAULT_PATH = ClassPath.getClassPath(); 036 private static final Map<ClassPath, SyntheticRepository> instances = new HashMap<>(); // CLASSPATH X REPOSITORY 037 038 private SyntheticRepository(final ClassPath path) { 039 super(path); 040 } 041 042 public static SyntheticRepository getInstance() { 043 return getInstance(ClassPath.SYSTEM_CLASS_PATH); 044 } 045 046 public static SyntheticRepository getInstance(final ClassPath classPath) { 047 SyntheticRepository rep = instances.get(classPath); 048 if (rep == null) { 049 rep = new SyntheticRepository(classPath); 050 instances.put(classPath, rep); 051 } 052 return rep; 053 } 054}