/*
    *    Copyright 2009-2021 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.apache.ibatis.reflection;
  
  import java.util.Collection;
  import java.util.List;
  import java.util.Map;
  
  import org.apache.ibatis.reflection.factory.ObjectFactory;
  import org.apache.ibatis.reflection.property.PropertyTokenizer;
  import org.apache.ibatis.reflection.wrapper.BeanWrapper;
  import org.apache.ibatis.reflection.wrapper.CollectionWrapper;
  import org.apache.ibatis.reflection.wrapper.MapWrapper;
  import org.apache.ibatis.reflection.wrapper.ObjectWrapper;
  import org.apache.ibatis.reflection.wrapper.ObjectWrapperFactory;
  
  /**
   * @author Clinton Begin
   */
  public class MetaObject {
  
    private final Object originalObject;
    private final ObjectWrapper objectWrapper;
    private final ObjectFactory objectFactory;
    private final ObjectWrapperFactory objectWrapperFactory;
    private final ReflectorFactory reflectorFactory;
  
    private MetaObject(Object object, ObjectFactory objectFactory, ObjectWrapperFactory objectWrapperFactory, ReflectorFactory reflectorFactory) {
      this.originalObject = object;
      this.objectFactory = objectFactory;
      this.objectWrapperFactory = objectWrapperFactory;
      this.reflectorFactory = reflectorFactory;
  
      if (object instanceof ObjectWrapper) {
        this.objectWrapper = (ObjectWrapper) object;
      } else if (objectWrapperFactory.hasWrapperFor(object)) {
        this.objectWrapper = objectWrapperFactory.getWrapperFor(this, object);
      } else if (object instanceof Map) {
        this.objectWrapper = new MapWrapper(this, (Map) object);
      } else if (object instanceof Collection) {
        this.objectWrapper = new CollectionWrapper(this, (Collection) object);
      } else {
        this.objectWrapper = new BeanWrapper(this, object);
      }
    }
  
    public static MetaObject forObject(Object object, ObjectFactory objectFactory, ObjectWrapperFactory objectWrapperFactory, ReflectorFactory reflectorFactory) {
      if (object == null) {
        return SystemMetaObject.NULL_META_OBJECT;
      } else {
        return new MetaObject(object, objectFactory, objectWrapperFactory, reflectorFactory);
      }
    }
  
    public ObjectFactory getObjectFactory() {
      return objectFactory;
    }
  
    public ObjectWrapperFactory getObjectWrapperFactory() {
      return objectWrapperFactory;
    }
  
    public ReflectorFactory getReflectorFactory() {
      return reflectorFactory;
    }
  
    public Object getOriginalObject() {
      return originalObject;
    }
  
    public String findProperty(String propName, boolean useCamelCaseMapping) {
      return objectWrapper.findProperty(propName, useCamelCaseMapping);
    }
  
    public String[] getGetterNames() {
      return objectWrapper.getGetterNames();
    }
  
    public String[] getSetterNames() {
      return objectWrapper.getSetterNames();
    }
  
    public Class<?> getSetterType(String name) {
      return objectWrapper.getSetterType(name);
    }
  
   public Class<?> getGetterType(String name) {
     return objectWrapper.getGetterType(name);
   }
 
   public boolean hasSetter(String name) {
     return objectWrapper.hasSetter(name);
   }
 
   public boolean hasGetter(String name) {
     return objectWrapper.hasGetter(name);
   }
 
   public Object getValue(String name) {
     PropertyTokenizer prop = new PropertyTokenizer(name);
     if (prop.hasNext()) {
       MetaObject metaValue = metaObjectForProperty(prop.getIndexedName());
       if (metaValue == SystemMetaObject.NULL_META_OBJECT) {
         return null;
       } else {
         return metaValue.getValue(prop.getChildren());
       }
     } else {
       return objectWrapper.get(prop);
     }
   }
 
   public void setValue(String name, Object value) {
     PropertyTokenizer prop = new PropertyTokenizer(name);
     if (prop.hasNext()) {
       MetaObject metaValue = metaObjectForProperty(prop.getIndexedName());
       if (metaValue == SystemMetaObject.NULL_META_OBJECT) {
         if (value == null) {
           // don't instantiate child path if value is null
           return;
         } else {
           metaValue = objectWrapper.instantiatePropertyValue(name, prop, objectFactory);
         }
       }
       metaValue.setValue(prop.getChildren(), value);
     } else {
       objectWrapper.set(prop, value);
     }
   }
 
   public MetaObject metaObjectForProperty(String name) {
     Object value = getValue(name);
     return MetaObject.forObject(value, objectFactory, objectWrapperFactory, reflectorFactory);
   }
 
   public ObjectWrapper getObjectWrapper() {
     return objectWrapper;
   }
 
   public boolean isCollection() {
     return objectWrapper.isCollection();
   }
 
   public void add(Object element) {
     objectWrapper.add(element);
   }
 
   public <E> void addAll(List<E> list) {
     objectWrapper.addAll(list);
   }
 
 }