TypeWithAnnotationDescriptor.java

/*
 * Copyright 2014 mango.jfaster.org
 *
 * The Mango Project 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.jfaster.mango.descriptor;

import org.jfaster.mango.util.reflect.TypeToken;
import org.jfaster.mango.util.reflect.TypeWrapper;

import javax.annotation.Nullable;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.util.List;

/**
 * @author ash
 */
public abstract class TypeWithAnnotationDescriptor {

  private final Type type;
  private final Class<?> rawType;
  private final List<Annotation> annotations;
  private final TypeWrapper typeWrapper;

  public TypeWithAnnotationDescriptor(Type type, List<Annotation> annotations) {
    this.type = type;
    this.rawType = TypeToken.of(type).getRawType();
    this.annotations = annotations;

    // TODO 参数检测优化
//    new TypeVisitor() {
//        @Override
//        public void visitGenericArrayType(GenericArrayType t) {
//            visit(t.getGenericComponentType());
//        }
//
//        @Override
//        public void visitParameterizedType(ParameterizedType t) {
//            visit(t.getOwnerType());
//            visit(t.getActualTypeArguments());
//        }
//
//        @Override
//        public void visitTypeVariable(TypeVariable<?> t) {
//            throw new IncorrectTypeException("Cannot contain type variable.");
//        }
//
//        @Override
//        public void visitWildcardType(WildcardType t) {
//            throw new IncorrectTypeException("Cannot contain wildcard type.");
//        }
//    }.visit(type);

    typeWrapper = new TypeWrapper(type);
  }

  public boolean isAnnotationPresent(Class<? extends Annotation> annotationType) {
    return getAnnotation(annotationType) != null;
  }

  @Nullable
  public <A extends Annotation> A getAnnotation(Class<A> annotationType) {
    for (Annotation annotation : getAnnotations()) {
      if (annotationType.isInstance(annotation)) {
        return annotationType.cast(annotation);
      }
    }
    return null;
  }

  public Type getType() {
    return type;
  }

  public Class<?> getRawType() {
    return rawType;
  }

  public List<Annotation> getAnnotations() {
    return annotations;
  }

  public boolean isArray() {
    return typeWrapper.isArray();
  }

  public boolean isCollection() {
    return typeWrapper.isCollection();
  }

  public boolean isList() {
    return typeWrapper.isList();
  }

  public boolean isArrayList() {
    return typeWrapper.isArrayList();
  }

  public boolean isLinkedList() {
    return typeWrapper.isLinkedList();
  }

  public boolean isSet() {
    return typeWrapper.isSet();
  }

  public boolean isHashSet() {
    return typeWrapper.isHashSet();
  }

  public boolean isIterable() {
    return typeWrapper.isIterable();
  }

  public boolean isListAssignable() {
    return isList() || isArrayList() || isLinkedList();
  }

  public boolean isSetAssignable() {
    return isSet() || isHashSet();
  }

  public Class<?> getMappedClass() {
    return typeWrapper.getMappedClass();
  }

  public Type getMappedType() {
    return typeWrapper.getMappedType();
  }

}