/*
* 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.internal.reflect;
import com.google.common.collect.Lists;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
public class ClassInspector {
/**
* Extracts a view of the given class. Ignores private methods.
*/
public static ClassDetails inspect(Class<?> type) {
MutableClassDetails classDetails = new MutableClassDetails(type);
visitGraph(type, classDetails);
return classDetails;
}
private static void visitGraph(Class<?> type, MutableClassDetails classDetails) {
Set<Class<?>> seen = new HashSet<Class<?>>();
List<Class<?>> queue = new ArrayList<Class<?>>();
// fully visit the class hierarchy before any interfaces in order to meet the contract
// of PropertyDetails.getGetters() etc.
queue.add(type);
Collections.addAll(queue, superClasses(type));
while (!queue.isEmpty()) {
Class<?> current = queue.remove(0);
if (!seen.add(current)) {
continue;
}
if (!current.equals(type)) {
classDetails.superType(current);
}
inspectClass(current, classDetails);
Collections.addAll(queue, current.getInterfaces());
}
}
private static Class<?>[] superClasses(Class<?> current) {
List<Class<?>> supers = Lists.newArrayList();
Class<?> superclass = current.getSuperclass();
while (superclass != null && superclass != Object.class) {
supers.add(superclass);
superclass = superclass.getSuperclass();
}
return supers.toArray(new Class<?>[0]);
}
private static void inspectClass(Class<?> type, MutableClassDetails classDetails) {
for (Method method : type.getDeclaredMethods()) {
classDetails.method(method);
if (Modifier.isPrivate(method.getModifiers()) || Modifier.isStatic(method.getModifiers()) || method.isBridge()) {
continue;
}
PropertyAccessorType accessorType = PropertyAccessorType.of(method);
if (accessorType == PropertyAccessorType.GET_GETTER || accessorType == PropertyAccessorType.IS_GETTER) {
String propertyName = accessorType.propertyNameFor(method);
classDetails.property(propertyName).addGetter(method);
} else if (accessorType == PropertyAccessorType.SETTER) {
String propertyName = accessorType.propertyNameFor(method);
classDetails.property(propertyName).addSetter(method);
} else {
classDetails.instanceMethod(method);
}
}
}
}