/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements. See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership. The ASF licenses this file
    * to you 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.apache.commons.weaver.model;
  
  import java.lang.reflect.Constructor;
  import java.lang.reflect.Field;
  import java.lang.reflect.Method;
  import java.util.Collections;
  import java.util.Comparator;
  import java.util.concurrent.ConcurrentNavigableMap;
  import java.util.concurrent.ConcurrentSkipListMap;
  
  import org.apache.commons.weaver.utils.Args;
  
  /**
   * {@link Weavable} {@link Class}.
   *
   * @param <T> type
   */
  public class WeavableClass<T> extends NestedWeavable<WeavableClass<T>, Class<T>, WeavablePackage, Package> {
      private static final Comparator<Class<?>> CLASS_COMPARATOR = Comparator.comparing(Class::getName);
  
      private final ConcurrentNavigableMap<String, WeavableField<T>> fields = new ConcurrentSkipListMap<>();
  
      private final ConcurrentNavigableMap<Constructor<T>, WeavableConstructor<T>> ctors = new ConcurrentSkipListMap<>(
          (ctor1, ctor2) -> Args.compare(ctor1.getParameterTypes(), ctor2.getParameterTypes()));
  
      private final ConcurrentNavigableMap<Method, WeavableMethod<T>> methods =
          new ConcurrentSkipListMap<>((methd1, methd2) -> {
              final int result = methd1.getName().compareTo(methd2.getName());
              return result == 0 ? Args.compare(methd1.getParameterTypes(), methd2.getParameterTypes()) : result;
          });
  
      /**
       * Create a new {@link WeavableClass} instance.
       * @param target {@link Class}
       * @param parent {@link WeavablePackage} enclosing
       */
      public WeavableClass(final Class<T> target, final WeavablePackage parent) {
          super(target, parent);
      }
  
      /**
       * Get a {@link WeavableField} representing {@code fld}.
       * @param fld to wrap
       * @return {@link WeavableField}
       */
      public WeavableField<T> getWeavable(final Field fld) {
          return fields.computeIfAbsent(fld.getName(), k -> new WeavableField<>(fld, this));
      }
  
      /**
       * Get a {@link WeavableMethod} representing {@code mt}.
       * @param methd to wrap
       * @return {@link WeavableMethod}
       */
      public WeavableMethod<T> getWeavable(final Method methd) {
          return methods.computeIfAbsent(methd, k -> new WeavableMethod<>(methd, this));
      }
  
      /**
       * Get a {@link WeavableConstructor} representing {@code ctor}.
       * @param ctor to wrap
       * @return {@link WeavableConstructor}
       */
      public WeavableConstructor<T> getWeavable(final Constructor<T> ctor) {
          return ctors.computeIfAbsent(ctor, k -> new WeavableConstructor<>(ctor, this));
      }
  
      /**
       * Get {@link WeavableField}s of this {@link WeavableClass}.
       * @return {@link Iterable}
       */
      public Iterable<WeavableField<T>> getFields() {
          return Collections.unmodifiableCollection(fields.values());
      }
  
      /**
       * Get {@link WeavableConstructor}s of this {@link WeavableClass}.
       * @return {@link Iterable}
       */
      public Iterable<WeavableConstructor<T>> getConstructors() {
          return Collections.unmodifiableCollection(ctors.values());
     }
 
     /**
      * Get {@link WeavableMethod}s of this {@link WeavableClass}.
      * @return {@link Iterable}
      */
     public Iterable<WeavableMethod<T>> getMethods() {
         return Collections.unmodifiableCollection(methods.values());
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     protected int localCompareTo(final WeavableClass<T> obj) {
         return obj == null ? 1 : CLASS_COMPARATOR.compare(getTarget(), obj.getTarget());
     }
 }