package org.nutz.mongo.entity;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
import org.nutz.lang.Mirror;
import org.nutz.lang.eject.EjectByGetter;
import org.nutz.lang.inject.InjectBySetter;
import org.nutz.lang.util.Callback3;
import org.nutz.mongo.annotation.CoField;
import org.nutz.mongo.annotation.CoId;
import org.nutz.mongo.entity.adaptor.ArrayAdaptor;
import org.nutz.mongo.entity.adaptor.EnumAdaptor;
import org.nutz.mongo.entity.adaptor.PojoAdaptor;
/**
* 提供给解析用的一个实体字段中间描述类，它的构造函数提供一点点分析功能，以便解析类更方便的解析实体
*
* @author zozoh(zozohtnt@gmail.com)
*/
class FieldInfo {
private final static String ERR_MSG = "Method '%s'(%s) can not add '@CoField', it MUST be a setter or getter!";
private String name;
private CoId _id;
private CoField annotation;
private FieldAdaptor adaptor;
private Mirror<?> mirror;
/**
* 根据字段得到 Field 信息
*
* @param fld
* 字段
*/
FieldInfo(Field fld) {
Mirror<?> typeMirror = Mirror.me(fld.getDeclaringClass());
this.name = fld.getName();
this.mirror = Mirror.me(fld.getType());
this._id = fld.getAnnotation(CoId.class);
this.annotation = fld.getAnnotation(CoField.class);
this.adaptor = _eval_adaptor(fld.getGenericType());
this.adaptor.setEjecting(typeMirror.getEjecting(fld.getName()));
this.adaptor.setInjecting(typeMirror.getInjecting(fld.getName()));
}
/**
* 根据 Getter 或者 setter 得到 Field 信息
*
* @param method
* 方法可以是 getter 或者 setter
*/
FieldInfo(Method method) {
this._id = method.getAnnotation(CoId.class);
this.annotation = method.getAnnotation(CoField.class);
Mirror.evalGetterSetter(method, ERR_MSG, new Callback3<String, Method, Method>() {
public void invoke(String nm, Method getter, Method setter) {
mirror = Mirror.me(getter.getGenericReturnType());
name = nm;
adaptor = _eval_adaptor(getter.getGenericReturnType());
adaptor.setEjecting(new EjectByGetter(getter));
adaptor.setInjecting(new InjectBySetter(setter));
}
});
}
private static FieldAdaptor _eval_adaptor(Type type) {
Mirror<?> mirror = Mirror.me(type);
// 枚举
if (mirror.isEnum()) {
return new EnumAdaptor();
}
// 数组
else if (mirror.isArray()) {
return new ArrayAdaptor();
}
// POJO
else if (mirror.isPojo()) {
return new PojoAdaptor();
}
// TODO 集合
// TODO Map
// TODO Timestamp
// 默认
return new FieldAdaptor();
}
public FieldAdaptor getAdaptor() {
return adaptor;
}
public String getName() {
return name;
}
public Mirror<?> getMirror() {
return mirror;
}
public CoId get_id() {
return _id;
}
public CoField getAnnotation() {
return annotation;
}
}