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/*
* Copyright 2014 the original author or authors.
*
* 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.gradle.model.internal.type;
import com.google.common.collect.ImmutableList;
import java.lang.ref.WeakReference;
import java.util.ArrayList;
class ClassTypeWrapper implements TypeWrapper {
private final WeakReference> reference;
private final int hashCode;
public ClassTypeWrapper(Class clazz) {
Class effectiveClass = effectiveClassOf(clazz);
this.reference = new WeakReference>(effectiveClass);
this.hashCode = effectiveClass.hashCode();
}
public Class unwrap() {
return reference.get();
}
@Override
public Class getRawClass() {
return unwrap();
}
@Override
public boolean isAssignableFrom(TypeWrapper wrapper) {
return unwrap().isAssignableFrom(wrapper.getRawClass());
}
@Override
public int hashCode() {
return hashCode;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null || obj.getClass() != getClass()) {
return false;
}
ClassTypeWrapper other = (ClassTypeWrapper) obj;
return unwrap().equals(other.unwrap());
}
@Override
public void collectClasses(ImmutableList.Builder> builder) {
builder.add(unwrap());
}
@Override
public String getRepresentation(boolean full) {
try {
return tryToGetRepresentation(full);
} catch (NoClassDefFoundError ignore) {
// This happens for IBM JDK 6 for nested interfaces -- see https://issues.apache.org/jira/browse/GROOVY-7010
// Let's try to return something as close as possible to the intended value
Class clazz = unwrap();
Package pkg = clazz.getPackage();
int pkgPrefixLength = pkg == null ? 0 : pkg.getName().length() + 1;
String simpleName = clazz.getName().substring(pkgPrefixLength).replace('$', '.');
return full && pkg != null
? pkg.getName() + "." + simpleName
: simpleName;
}
}
private String tryToGetRepresentation(boolean full) {
ArrayList> classChain = getEnclosingClassChain();
int topLevelIndex = classChain.size() - 1;
Class topLevelClass = classChain.get(topLevelIndex);
StringBuilder representation = new StringBuilder();
representation.append(
full ? topLevelClass.getName() : topLevelClass.getSimpleName());
for (int i = topLevelIndex - 1; i >= 0; i--) {
representation.append('.');
representation.append(classChain.get(i).getSimpleName());
}
return representation.toString();
}
private ArrayList> getEnclosingClassChain() {
ArrayList> classChain = new ArrayList>();
Class clazz = unwrap();
do {
classChain.add(clazz);
clazz = clazz.getEnclosingClass();
} while (clazz != null);
return classChain;
}
private Class effectiveClassOf(Class clazz) {
Class enclosingClass = clazz.getEnclosingClass();
// Detect anonymous static classes of enum constants with class body
// See https://docs.oracle.com/javase/specs/jls/se7/html/jls-8.html#d5e12300
// And https://docs.oracle.com/javase/specs/jls/se7/html/jls-8.html#jls-8.9.1
// "The optional class body of an enum constant implicitly defines an anonymous class declaration
// that extends the immediately enclosing enum type."
if (enclosingClass != null
&& enclosingClass.isEnum()
&& clazz.getSuperclass() == enclosingClass) {
return enclosingClass;
}
return clazz;
}
}