package org.nutz.json.entity;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.lang.reflect.Type;
import org.nutz.json.JsonField;
import org.nutz.lang.Lang;
import org.nutz.lang.Mirror;
import org.nutz.lang.Strings;
import org.nutz.lang.eject.EjectByGetter;
import org.nutz.lang.eject.Ejecting;
import org.nutz.lang.inject.InjectBySetter;
import org.nutz.lang.inject.Injecting;
public class JsonEntityField {
private String name;
private Type genericType;
private Injecting injecting;
private Ejecting ejecting;
/**
* 根据名称获取字段实体, 默认以set优先
*/
public static JsonEntityField eval(String name, Method getter, Method setter) {
JsonEntityField jef = new JsonEntityField();
jef.genericType = getter.getGenericReturnType();
jef.name = name;
jef.ejecting = new EjectByGetter(getter);
jef.injecting = new InjectBySetter(setter);
return jef;
}
public static JsonEntityField eval(Mirror<?> mirror, Field fld) {
if (fld == null) {
return null;
}
// 瞬时变量就不要持久化了
if (Modifier.isTransient(fld.getModifiers()))
return null;
// 以特殊字符开头的字段，看起来是隐藏字段
// XXX 有用户就是_开头的字段也要啊! by wendal
//if (fld.getName().startsWith("_") || fld.getName().startsWith("$"))
if (fld.getName().startsWith("$") && fld.getAnnotation(JsonField.class) == null)
return null;
JsonField jf = fld.getAnnotation(JsonField.class);
if (null != jf && jf.ignore())
return null;
JsonEntityField jef = new JsonEntityField();
jef.genericType = Lang.getFieldType(mirror, fld);
jef.name = Strings.sBlank(null == jf ? null : jf.value(), fld.getName());
jef.ejecting = mirror.getEjecting(fld.getName());
jef.injecting = mirror.getInjecting(fld.getName());
return jef;
}
private JsonEntityField() {}
public String getName() {
return name;
}
public Type getGenericType() {
return genericType;
}
public void setValue(Object obj, Object value) {
if (injecting != null)
injecting.inject(obj, value);
}
public Object getValue(Object obj) {
if (ejecting == null)
return null;
return ejecting.eject(obj);
}
}