工作流常使用API

记录实际开发中常使用到的API

CreateProcess

在工作流开始之前，创建一个新的工作流

Wf_engine.CreateProcess

(itemtype in varchar2,    --Workflow Item Type

itemkey in varchar2,    --Item Key

process in varchar2 default '',  --Workflow Process

user_key in varchar2 default null,  --  user-friendly KEY

owner_role in varchar2 default null); -- Workflow role

SetItemUserKey

设置User Key 的值

Wf_engine.SetItemUserKey

(itemtype in varchar2,

itemkey in varchar2,

userkey in varchar2);

SetItemOwner

设置当前工作流的所有者

Wf_engine.SetItemOwner

(itemtype in varchar2,

itemkey in varchar2,

owner in varchar2);

StartProcess

开启工作流

Wf_engine.StartProcess

(itemtype in varchar2,

itemkey in varchar2);

增加Attribute

虽然attribute一般是在设计初，进行的定义，但我们也可以通过下面的API，使程序在运行中生成所需的Attribute：

Wf_engine.AddItemAttr

(itemtype in varchar2,

itemkey in varchar2,

aname in varchar2,

text_value in varchar2 default null,

number_value in number default null,

date_value in date default null);

写入和读取Attribute的值

Attribute充当工作流变量的角色，所以对它的值的写入和读取，是经常性使用导的

--Text类的attribute:

Wf_engine.SetItemAttrText

(itemtype in varchar2,

itemkey in varchar2,

aname in varchar2,

avalue in varchar2);

-- return varchar2;

result := Wf_engine.GetItemAttrText

(itemtype in varchar2,

itemkey in varchar2,

aname in varchar2,

ignore_notfound in boolean default FALSE);

--Number类的attribute:

Wf_engine.SetItemAttrNumber

(itemtype in varchar2,

itemkey in varchar2,

aname in varchar2,

avalue in number);

-- return number

Wf_engine.GetItemAttrNumber

(itemtype in varchar2,

itemkey in varchar2,

aname in varchar2,

ignore_notfound in boolean default FALSE) ;

--Date类的attribute:

Wf_engine.SetItemAttrDate

(itemtype in varchar2,

itemkey in varchar2,

aname in varchar2,

avalue in date);

--return date

Wf_engine.GetItemAttrDate

(itemtype in varchar2,

itemkey in varchar2,

aname in varchar2,

ignore_notfound in boolean default FALSE);

--Event类的attribute:

Wf_engine.SetItemAttrEvent

(itemtype in varchar2,

itemkey in varchar2,

name in varchar2,

event in wf_event_t);

--return wf_event_t

Wf_engine.GetItemAttrEvent

(itemtype in varchar2,

itemkey in varchar2,

name in varchar2);