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Diffstat (limited to 'src/main/java/com/code_intelligence/jazzer/mutation/api/MutatorFactory.java')
-rw-r--r-- | src/main/java/com/code_intelligence/jazzer/mutation/api/MutatorFactory.java | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/src/main/java/com/code_intelligence/jazzer/mutation/api/MutatorFactory.java b/src/main/java/com/code_intelligence/jazzer/mutation/api/MutatorFactory.java new file mode 100644 index 00000000..64771285 --- /dev/null +++ b/src/main/java/com/code_intelligence/jazzer/mutation/api/MutatorFactory.java @@ -0,0 +1,80 @@ +/* + * Copyright 2023 Code Intelligence GmbH + * + * 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 com.code_intelligence.jazzer.mutation.api; + +import static com.code_intelligence.jazzer.mutation.support.Preconditions.require; +import static com.code_intelligence.jazzer.mutation.support.TypeSupport.asAnnotatedType; +import static java.lang.String.format; + +import com.google.errorprone.annotations.CheckReturnValue; +import java.lang.reflect.AnnotatedType; +import java.util.Optional; + +/** + * Instances of this class are not required to be thread safe, but are generally lightweight and can + * thus be created as needed. + */ +public abstract class MutatorFactory { + public final boolean canMutate(AnnotatedType type) { + return tryCreate(type).isPresent(); + } + + public final <T> SerializingMutator<T> createOrThrow(Class<T> clazz) { + return (SerializingMutator<T>) createOrThrow(asAnnotatedType(clazz)); + } + + public final SerializingMutator<?> createOrThrow(AnnotatedType type) { + Optional<SerializingMutator<?>> maybeMutator = tryCreate(type); + require(maybeMutator.isPresent(), "Failed to create mutator for " + type); + return maybeMutator.get(); + } + + public final SerializingInPlaceMutator<?> createInPlaceOrThrow(AnnotatedType type) { + Optional<SerializingInPlaceMutator<?>> maybeMutator = tryCreateInPlace(type); + require(maybeMutator.isPresent(), "Failed to create mutator for " + type); + return maybeMutator.get(); + } + + /** + * Tries to create a mutator for {@code type} and, if successful, asserts that it is an instance + * of {@link SerializingInPlaceMutator}. + */ + public final Optional<SerializingInPlaceMutator<?>> tryCreateInPlace(AnnotatedType type) { + return tryCreate(type).map(mutator -> { + require(mutator instanceof InPlaceMutator<?>, + format("Mutator for %s is not in-place: %s", type, mutator.getClass())); + return (SerializingInPlaceMutator<?>) mutator; + }); + } + + @CheckReturnValue + public final Optional<SerializingMutator<?>> tryCreate(AnnotatedType type) { + return tryCreate(type, this); + } + + /** + * Attempt to create a {@link SerializingMutator} for the given type. + * + * @param type the type to mutate + * @param factory the factory to use when creating submutators + * @return a {@link SerializingMutator} for the given {@code type}, or {@link Optional#empty()} + * if this factory can't create such mutators + */ + @CheckReturnValue + public abstract Optional<SerializingMutator<?>> tryCreate( + AnnotatedType type, MutatorFactory factory); +} |