MyBatis延遲載入
阿新 • • 發佈：2019-01-03
*/
@Override
public Object invoke(Object enhanced, Method method, Method methodProxy, Object[] args) throws Throwable {
final String methodName = method.getName();
try {
synchronized (lazyLoader) {
if (WRITE_REPLACE_METHOD.equals(methodName)) {
//忽略暫未找到具體作用
Object original;
if (constructorArgTypes.isEmpty()) {
original = objectFactory.create(type);
} else {
original = objectFactory.create(type, constructorArgTypes, constructorArgs);
}
PropertyCopier.copyBeanProperties(type, enhanced, original);
if (lazyLoader.size() > 0) {
return new JavassistSerialStateHolder(original, lazyLoader.getProperties(), objectFactory, constructorArgTypes, constructorArgs);
} else {
return original;
}
} else {
//延遲載入數量大於0
if (lazyLoader.size() > 0 && !FINALIZE_METHOD.equals(methodName)) {
//aggressive 一次載入性所有需要要延遲載入屬性或者包含觸發延遲載入方法
if (aggressive || lazyLoadTriggerMethods.contains(methodName)) {
log.debug("==> laze lod trigger method:" + methodName + “,proxy method:” + methodProxy.getName() + " class:" + enhanced.getClass());
//一次全部載入
lazyLoader.loadAll();
} else if (PropertyNamer.isSetter(methodName)) {
//判斷是否為set方法，set方法不需要延遲載入
final String property = PropertyNamer.methodToProperty(methodName);
lazyLoader.remove(property);
} else if (PropertyNamer.isGetter(methodName)) {
final String property = PropertyNamer.methodToProperty(methodName);
if (lazyLoader.hasLoader(property)) {
//延遲載入單個屬性
lazyLoader.load(property);
log.debug(“load one :” + methodName);
}
}
}
}
}
return methodProxy.invoke(enhanced, args);
} catch (Throwable t) {
throw ExceptionUtil.unwrapThrowable(t);
}
}
}