org.mutabilitydetector.ThreadUnsafeAnalysisSession Maven / Gradle / Ivy

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Lightweight analysis tool for detecting mutability in Java classes.
There is a newer version: 0.10.6
package org.mutabilitydetector;

/*
 * #%L
 * MutabilityDetector
 * %%
 * Copyright (C) 2008 - 2014 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.
 * #L%
 */



import static com.google.common.collect.Lists.newArrayList;
import static org.mutabilitydetector.checkers.info.AnalysisDatabase.newAnalysisDatabase;
import static org.mutabilitydetector.locations.Dotted.dotted;

import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Map;

import org.mutabilitydetector.asmoverride.AsmVerifierFactory;
import org.mutabilitydetector.asmoverride.ClassLoadingVerifierFactory;
import org.mutabilitydetector.checkers.AllChecksRunner;
import org.mutabilitydetector.checkers.AsmSessionCheckerRunner;
import org.mutabilitydetector.checkers.CheckerRunnerFactory;
import org.mutabilitydetector.checkers.ClassPathBasedCheckerRunnerFactory;
import org.mutabilitydetector.checkers.MutabilityCheckerFactory;
import org.mutabilitydetector.checkers.info.AnalysisDatabase;
import org.mutabilitydetector.checkers.info.MutableTypeInformation;
import org.mutabilitydetector.checkers.info.SessionCheckerRunner;
import org.mutabilitydetector.classloading.CachingAnalysisClassLoader;
import org.mutabilitydetector.classloading.ClassForNameWrapper;
import org.mutabilitydetector.locations.Dotted;
import com.google.classpath.ClassPath;
import com.google.classpath.ClassPathFactory;
import com.google.common.cache.Cache;
import com.google.common.cache.CacheBuilder;

public final class ThreadUnsafeAnalysisSession implements AnalysisSession, AnalysisErrorReporter {

    private final Cache analysedClasses = CacheBuilder.newBuilder().recordStats().build();
    private final List analysisErrors = newArrayList();

    private final MutabilityCheckerFactory checkerFactory;
    private final CheckerRunnerFactory checkerRunnerFactory;
    private final AnalysisDatabase database;
    private final AsmVerifierFactory verifierFactory;
    private final MutableTypeInformation mutableTypeInformation;
    
    private ThreadUnsafeAnalysisSession(CheckerRunnerFactory checkerRunnerFactory, 
                             MutabilityCheckerFactory checkerFactory,
                             AsmVerifierFactory verifierFactory, 
                             Configuration configuration) {
        this.checkerRunnerFactory = checkerRunnerFactory;
        this.checkerFactory = checkerFactory;
        this.verifierFactory = verifierFactory;
        mutableTypeInformation = new MutableTypeInformation(this, configuration);
        AsmSessionCheckerRunner sessionCheckerRunner = new SessionCheckerRunner(this, checkerRunnerFactory.createRunner());
        this.database = newAnalysisDatabase(sessionCheckerRunner);
    }

    public static AnalysisSession createWithGivenClassPath(ClassPath classpath,
                                                           CheckerRunnerFactory checkerRunnerFactory,
                                                           MutabilityCheckerFactory checkerFactory,
                                                           AsmVerifierFactory verifierFactory,
                                                           Configuration configuration) {
        return createWithGivenClassPath(classpath, configuration, verifierFactory);
    }

    
    /**
     * Creates an analysis session based suitable for runtime analysis.
     * 
     * For analysis, classes will be accessed through the runtime classpath.
     * 
     * @see ConfigurationBuilder
     * @param configuration custom configuration for analysis.
     * @return AnalysisSession for runtime analysis.
     */
    public static AnalysisSession createWithCurrentClassPath(Configuration configuration) {
        ClassPath classpath = new ClassPathFactory().createFromJVM();
        ClassLoadingVerifierFactory verifierFactory = new ClassLoadingVerifierFactory(new CachingAnalysisClassLoader(new ClassForNameWrapper()));
        return createWithGivenClassPath(classpath, configuration, verifierFactory);
    }

    @SuppressWarnings("deprecation")
    private static AnalysisSession createWithGivenClassPath(ClassPath classpath,
                                                            Configuration configuration,
                                                            AsmVerifierFactory verifierFactory) {
        return new ThreadUnsafeAnalysisSession(new ClassPathBasedCheckerRunnerFactory(classpath, configuration.exceptionPolicy()), 
                                               new MutabilityCheckerFactory(configuration.reassignedFieldAlgorithm(), configuration.immutableContainerClasses()),
                                               verifierFactory, 
                                               configuration);
    }

    @Override
    public AnalysisResult resultFor(Dotted className) {
        return requestAnalysis(className);
    }

    private AnalysisResult requestAnalysis(Dotted className) {
        AnalysisResult existingResult = analysedClasses.getIfPresent(className);
        if (existingResult != null) {
            return existingResult;
        }
        
        AllChecksRunner allChecksRunner = new AllChecksRunner(checkerFactory,
                                                              checkerRunnerFactory,
                                                              verifierFactory, 
                                                              className);
        
        return addAnalysisResult(allChecksRunner.runCheckers(this, this, database, mutableTypeInformation));
    }

    private AnalysisResult addAnalysisResult(AnalysisResult result) {
        analysedClasses.put(dotted(result.dottedClassName), result);
        return result;
    }

    @Override
    public void addAnalysisError(AnalysisError error) {
        analysisErrors.add(error);
    }

    @Override
    public Collection getResults() {
        return Collections.unmodifiableCollection(analysedClasses.asMap().values());
    }

    @Override
    public Map resultsByClass() {
        return Collections.unmodifiableMap(analysedClasses.asMap());
    }

    @Override
    public Collection getErrors() {
        return Collections.unmodifiableCollection(analysisErrors);
    }

    @Override
    public AnalysisErrorReporter errorReporter() {
        return this;
    }
}