MemorySensitiveClassPathRepository.java
- /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You 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.
- */
- package org.apache.bcel.util;
- import java.lang.ref.SoftReference;
- import java.util.HashMap;
- import java.util.Map;
- import org.apache.bcel.classfile.JavaClass;
- /**
- * 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 specified in the given class path. By default, this is the value returned by
- * ClassPath.getClassPath(). This repository holds onto classes with SoftReferences, and will reload as needed, in cases
- * where memory sizes are important.
- *
- * @see org.apache.bcel.Repository
- */
- public class MemorySensitiveClassPathRepository extends AbstractClassPathRepository {
- private final Map<String, SoftReference<JavaClass>> loadedClasses = new HashMap<>(); // CLASSNAME X JAVACLASS
- public MemorySensitiveClassPathRepository(final ClassPath path) {
- super(path);
- }
- /**
- * Clear all entries from cache.
- */
- @Override
- public void clear() {
- loadedClasses.clear();
- }
- /**
- * Find an already defined (cached) JavaClass object by name.
- */
- @Override
- public JavaClass findClass(final String className) {
- final SoftReference<JavaClass> ref = loadedClasses.get(className);
- return ref == null ? null : ref.get();
- }
- /**
- * Remove class from repository
- */
- @Override
- public void removeClass(final JavaClass clazz) {
- loadedClasses.remove(clazz.getClassName());
- }
- /**
- * Store a new JavaClass instance into this Repository.
- */
- @Override
- public void storeClass(final JavaClass clazz) {
- // Not calling super.storeClass because this subclass maintains the mapping.
- loadedClasses.put(clazz.getClassName(), new SoftReference<>(clazz));
- clazz.setRepository(this);
- }
- }