org.mutabilitydetector.classloading.CachingAnalysisClassLoader Maven / Gradle / Ivy

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Lightweight analysis tool for detecting mutability in Java classes.

There is a newer version: 0.10.6

/*
 *    Copyright (c) 2008-2013 Graham Allan
 *
 *   Licensed 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.mutabilitydetector.classloading;

import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;


import com.google.common.cache.Cache;
import com.google.common.cache.CacheBuilder;

public final class CachingAnalysisClassLoader implements AnalysisClassLoader {
    
    private final Cache> cache = CacheBuilder.newBuilder().recordStats().build();
    private final AnalysisClassLoader classLoader;
    
    public CachingAnalysisClassLoader(AnalysisClassLoader classLoader) {
        this.classLoader = classLoader;
    }

    @Override
    public Class loadClass(final String dottedClass) throws ClassNotFoundException {
        try {
            return cache.get(dottedClass, new Callable>() {
                @Override public Class call() throws Exception {
                    return classLoader.loadClass(dottedClass);
                }
            });
        } catch (ExecutionException e) {
            throw new ClassNotFoundException("Error loading class: " + dottedClass, e.getCause());
        }
    }

}