Activiti 使用小结

自定义表单类型

使用动态表单，需要定义表单的字段以及属性，在WEB流程设计器中没有Default字段（Eclipse中有），给设计带来了一定的困难，下面介绍如何在WEB流程设计器中扩展表单。

首先在stencilset.json文件中添加扩展类型，添加的位置就是formproperty_type下，将会出现在下拉框中

{

"id" : "formproperty_type",

"name" : "Type",

"name_de" : "Typ",

"type" : "Choice",

"value" : "",

"width" : 100,

"optional" : false,

"items" : [ {

"id" : "c1",

"title" : "String",

"title_de" : "String",

"value" : "string",

"refToView" : ""

}, {

"id" : "c2",

"title" : "Date",

"title_de" : "Date",

"value" : "date",

"refToView" : ""

}, {

"id" : "c3",

"title" : "Long",

"title_de" : "Long",

"value" : "long",

"refToView" : ""

}, {

"id" : "c4",

"title" : "Boolean",

"title_de" : "Boolean",

"value" : "boolean",

"refToView" : ""

}, {

"id" : "c5",

"title" : "Enum",

"title_de" : "Enum",

"value" : "enum",

"refToView" : ""

}, {

"id" : "c6",

"title" : "SmartRef",

"title_de" : "SmartRef",

"value" : "smartref",

"refToView" : ""

}, {

"id" : "c7",

"title" : "Group",

"title_de" : "Group",

"value" : "group",

"refToView" : ""

}

]

}

 

 

构建自定义的GroupFormType，如果只要一般的扩展，则不用对加入values

public
class GroupFormType extends AbstractFormType

{

    protected Map<String, String> values;

    public GroupFormType(){}

    public GroupFormType(Map<String, String> values)

    {

        this.values = values;

    }

    @Override

    public String getName()

    {

        return ActivitiConstants.GROUP_TYPE;

    }

    @Override

    public Object convertFormValueToModelValue(String propertyValue)

    {

        return
propertyValue;

    }

    @Override

    public String convertModelValueToFormValue(Object modelValue)

    {

        return
modelValue == null ? null : modelValue.toString();

    }

    @Override

    public Object getInformation(String key)

    {

        if (ActivitiConstants.VALUES_KEY.equals(key))

        {

            return
values;

        } else

        {

            return
null;

        }

    }

}

 

扩展FormTypes，使得自定义类型能够处理FormValues

public
class CustomFormTypes extends
FormTypes

{

    @Override

    public AbstractFormType parseFormPropertyType(FormProperty formProperty)

    {

        if (ActivitiConstants.GROUP_TYPE.equals(formProperty.getType()))

        {

            Map<String, String> values = new LinkedHashMap<String, String>();

            for (FormValue formValue : formProperty.getFormValues())

            {

                values.put(formValue.getId(), formValue.getName());

            }

            return
new GroupFormType(values);

        } else
if (ActivitiConstants.SMART_REF_TYPE.equals(formProperty.getType()))

        {

            Map<String, String> values = new LinkedHashMap<String, String>();

            for (FormValue formValue : formProperty.getFormValues())

            {

                values.put(formValue.getId(), formValue.getName());

            }

            return
new SmartRefFormType(values);

        } else

        {

            return
super.parseFormPropertyType(formProperty);

        }

 

    }

}

 

在流程引擎参数中设置，需要注意的是，如果扩展了FormTypes,则需要把所有的类型都加入到参数中（包括自带类型），否则会报找不到类型

<bean
id="processEngineConfiguration"
class="org.activiti.spring.SpringProcessEngineConfiguration">

<property
name="formTypes">

<bean
class="com.pera.dwf.web.activiti.formtype.CustomFormTypes"
/>

</property>

<property
name="customFormTypes">

<list>

<bean
class="org.activiti.engine.impl.form.StringFormType"
/>

<bean
class="org.activiti.engine.impl.form.LongFormType"
/>

<bean
class="org.activiti.engine.impl.form.DateFormType">

    <constructor-arg
value="yyyy-MM-dd"
/>

</bean>

<bean
class="org.activiti.engine.impl.form.BooleanFormType"
/>

<bean
class="com.pera.dwf.web.activiti.formtype.GroupFormType"></bean>

<bean
class="com.pera.dwf.web.activiti.formtype.SmartRefFormType"></bean>

</list>

</property>

 

经过处理后，最终的动态表单的返回值，可以得到FormValues的值

0:  

{

infos: 

{

5ef89d50-95ff-4e33-8aa1-48df354c6c52: "不合格品文档"

}

-

fp: 

{

id: "Excel1"

name: "不合格品文档"

type: 

{

name: "smartref"

}

-

value: null

required: false

writable: true

readable: true

}

-

}