/*
 * 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 Also:
Repository/**
 * 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);
    }

    
Store a new JavaClass instance into this Repository.
/**
     * 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);
    }

    
Remove class from repository
/**
     * Remove class from repository
     */
    @Override
    public void removeClass(final JavaClass clazz) {
        _loadedClasses.remove(clazz.getClassName());
    }

    
Find an already defined (cached) JavaClass object by name.
/**
     * Find an already defined (cached) JavaClass object by name.
     */
    @Override
    public JavaClass findClass(final String className) {
        final SoftReference<JavaClass> ref = _loadedClasses.get(className);
        if (ref == null) {
            return null;
        }
        return ref.get();
    }

    
Clear all entries from cache.
/**
     * Clear all entries from cache.
     */
    @Override
    public void clear() {
        _loadedClasses.clear();
    }
}