GregorMutationEngine.java

/*
 * Copyright 2010 Henry Coles
 *
 * 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.pitest.mutationtest.engine.gregor;

import java.util.Collection;
import java.util.LinkedHashSet;
import java.util.Set;

import org.pitest.classinfo.ClassByteArraySource;
import org.pitest.functional.F;
import org.pitest.functional.FCollection;
import org.pitest.functional.predicate.Predicate;
import org.pitest.mutationtest.engine.Mutater;
import org.pitest.mutationtest.engine.MutationEngine;
import org.pitest.mutationtest.engine.gregor.inlinedcode.InlinedCodeFilter;

/**
 * The default (and currently only) mutation engine for PIT.
 *
 * In case anyone was wondering I'm named after either Gregor Mendel or Gregor
 * Samsa, or maybe both.
 */
public class GregorMutationEngine implements MutationEngine {

  private final Set<MethodMutatorFactory> mutationOperators = new LinkedHashSet<MethodMutatorFactory>();
  private final Set<String>               loggingClasses    = new LinkedHashSet<String>();
  private final Predicate<MethodInfo>     methodFilter;
  private final InlinedCodeFilter         inlinedCodeDetector;

  public GregorMutationEngine(final MutationEngineConfiguration config) {
    this.methodFilter = config.methodFilter();
    this.mutationOperators.addAll(config.mutators());
    this.loggingClasses.addAll(config.doNotMutateCallsTo());
    this.inlinedCodeDetector = config.inlinedCodeDetector();
  }

  @Override
  public Mutater createMutator(final ClassByteArraySource byteSource) {
    return new GregorMutater(byteSource, this.methodFilter,
        this.mutationOperators, this.loggingClasses, this.inlinedCodeDetector);
  }

  @Override
  public String toString() {
    return "GregorMutationEngine [filter=" + this.methodFilter
        + ", mutationOperators=" + this.mutationOperators + "]";
  }

  @Override
  public Collection<String> getMutatorNames() {
    return FCollection.map(this.mutationOperators, toName());
  }

  private static F<MethodMutatorFactory, String> toName() {
    return new F<MethodMutatorFactory, String>() {

      @Override
      public String apply(final MethodMutatorFactory a) {
        return a.getName();
      }

    };
  }

}