Cordys JAVA Object理解

SM_TENANT_MENU tenant_menu=new SM_TENANT_MENU(BusObjectConfig.TRANSIENT); 临时变量

当 如果是从数据库 query.getObjects();取出时，可以用 tenant_menu.makeTransient();

很多时候，我们通过cordys给我们提供的查询方法 返回对象后， query.getObjects(); 我们可能 想改变 某个特定对象的值，则我们可以直接用for循环 找到这个对象，改变值即可

例如：

BusObjectIterator<langinfo>langinfos=query.getObjects();
while(langinfos.hasMoreElements()){
langinfoinfo=langinfos.nextElement();
info.makeTransient();
info.lang="11";

}

改完后 直接 返回langinfos即可，无需 在整个容器，往容器里一个个添加，添加完后再返回，这是Cordys与普通java的不同 。

很多时候，我们可能是这样，要拼接 通过我们常用的 容器 来拼接对象 如： Vector ArrayList 等 ，我们需要

VectorfinalResult = new Vector();

new BusObjectArray(finalResult);

转换为： BusObjectIterator

public static BusObjectIteratorgetCustomersObjects(String fromCustomerID, String toCustomerID)
{
// 1. get the original result
BusObjectIterator originalResult =CustomersBase.getCustomersObjects(fromCustomerID, toCustomerID);
// 2. create Vector to store the finalresult
Vector finalResult = new Vector();
// 3. fill the finalResult based on theoriginalResult
// for example: filter out someelements
while (originalResult.hasMoreElements() )
{
Customers c =(Customers)originalResult.nextElement();
// add to the final result?
if ( some_condition )
{
finalResult.add(c);
}
}
// if required: do more processing onfinal result
// 4. make a BusObjectIterator out ofthe Vector and return it
return new BusObjectArray(finalResult);
}

SM_TENANT_MENUtenant_menu=new SM_TENANT_MENU(); 虽然没有 写 tenant_menu.insert(); 但，事物提交完后，默认会执行Insert方法

public void_changeObject() {
this.m_objectState.onChange();
}

protected void onAfterLoad() {
log("OnAfterLoad");
}

protected void onBeforeInsert() {
log("OnBeforeInsert");
}

protected void onAfterInsert() {
log("OnAfterInsert");
}

protected void onBeforeUpdate() {
log("OnBeforeUpdate");
}

protected void onAfterUpdate() {
log("OnAfterUpdate");
}

protected void onBeforeDelete() {
log("OnBeforeDelete");
}

protected void onAfterDelete() {
log("OnAfterDelete");
}

充分利用主外键 的关系来

States of a BusObject

This topic identifies the different forms that a BusObject assumes, when it is used in a workflow.

The following flow diagram portrays thedifferent states of a BusObject.

The various states are explained in the following table.

Table 1. States of a BusObject

State	Description
N (new)	Indicates that an object has just been created.
NI (inserted)	Indicates that an insert () operation has been performed on the object. When the object is changed, it attains the NC (new + changed) state. When the object is committed, it attains the L (loaded) state.
NC (new + changed)	Indicates that an object, which has just been created, has been changed.
t (transient)	Indicates that the object is independent of any transaction. In such a state, committing a transaction will not affect the object. If an insert () operation is performed on an object in this state, the object attains the NI (inserted) state.
L (loaded)	Indicates that the object has just been loaded from the database into a transaction (for example, using a query). It also indicates that currently the object content has not undergone any change. An object attains this state as soon as it is inserted or updated in the database.
LC (loaded + changed)	Indicates that the contents of the object are changed.
LU (updated)	Indicates that an update () operation has been performed on the object. As soon as one of the attributes of the object is updated, it attains the LC state.
LD (deleted)	Indicates that a delete () operation has been performed on the object.