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Mutation testing system for Java.
/*
* Copyright 2011 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.classinfo;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.Optional;
public class Repository implements ClassInfoSource {
private final HashFunction hashFunction;
private final Map knownClasses = new HashMap<>();
private final Set unknownClasses = new HashSet<>();
private final ClassByteArraySource source;
public Repository(final ClassByteArraySource source) {
this(source, new AddlerHash());
}
Repository(final ClassByteArraySource source, final HashFunction hashFunction) {
this.source = source;
this.hashFunction = hashFunction;
}
public boolean hasClass(final ClassName name) {
return this.knownClasses.containsKey(name) || querySource(name).isPresent();
}
public Optional fetchClass(final Class clazz) { // NO_UCD (test
// only)
return fetchClass(clazz.getName());
}
private Optional fetchClass(final String name) {
return fetchClass(ClassName.fromString(name));
}
@Override
public Optional fetchClass(final ClassName name) {
final ClassInfo info = this.knownClasses.get(name);
if (info != null) {
return Optional.ofNullable(info);
}
final Optional maybeInfo = nameToClassInfo(name);
if (maybeInfo.isPresent()) {
this.knownClasses.put(name, maybeInfo.get());
}
return maybeInfo;
}
private Optional nameToClassInfo(final ClassName name) {
final Optional bytes = querySource(name);
if (bytes.isPresent()) {
final ClassInfoBuilder classData = ClassInfoVisitor.getClassInfo(name,
bytes.get(), this.hashFunction.hash(bytes.get()));
return contructClassInfo(classData);
} else {
return Optional.empty();
}
}
public Optional querySource(final ClassName name) {
if (this.unknownClasses.contains(name)) {
return Optional.empty();
}
final Optional option = this.source.getBytes(name.asJavaName());
if (option.isPresent()) {
return option;
}
this.unknownClasses.add(name);
return option;
}
private Optional contructClassInfo(final ClassInfoBuilder classData) {
return Optional.ofNullable(new ClassInfo(resolveClass(classData.superClass),
resolveClass(classData.outerClass), classData));
}
private ClassPointer resolveClass(final String clazz) {
if (clazz == null) {
return new DefaultClassPointer(null);
} else {
final ClassInfo alreadyResolved = this.knownClasses.get(ClassName
.fromString(clazz));
if (alreadyResolved != null) {
return new DefaultClassPointer(alreadyResolved);
} else {
return new DeferredClassPointer(this, ClassName.fromString(clazz));
}
}
}
}