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(). 026 * <p> 027 * 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 028 * classpath. 029 * </p> 030 * 031 * @see org.apache.bcel.Repository 032 * 033 */ 034public class SyntheticRepository extends MemorySensitiveClassPathRepository { 035 036 // private static final String DEFAULT_PATH = ClassPath.getClassPath(); 037 private static final Map<ClassPath, SyntheticRepository> instances = new HashMap<>(); // CLASSPATH X REPOSITORY 038 039 private SyntheticRepository(final ClassPath path) { 040 super(path); 041 } 042 043 public static SyntheticRepository getInstance() { 044 return getInstance(ClassPath.SYSTEM_CLASS_PATH); 045 } 046 047 public static SyntheticRepository getInstance(final ClassPath classPath) { 048 SyntheticRepository rep = instances.get(classPath); 049 if (rep == null) { 050 rep = new SyntheticRepository(classPath); 051 instances.put(classPath, rep); 052 } 053 return rep; 054 } 055}