Groovy'as'关键字来实现2+接口 [英] Groovy 'as' keyword to implement 2+ interfaces

问题描述

我想实现一个具有AdvancedTableFormat和WritableTableFormat接口的Glazed List。

我在这里阅读：
http://www.jroller.com/aalmiray/entry/glazedlists_groovy_not_your_regular

，对于一个接口，Groovy似乎可以使用as关键字：

 ＃return新的EventTableModel（linksList，[
＃getColumnCount：{columnNames.size（）}，
＃getColumnName：{index  - > columnNames [index]}，
＃getColumnValue：{object，index - > 
＃object。$ {columnNames [index] .toLowerCase（）}
＃}] as TableFormat）
  

是否有可能为两个接口执行此操作？如果是这样怎么样？

谢谢！

Misha

解决方案

您可以创建一个新界面来扩展您感兴趣的两个界面。

  interface PersonalizedTableFormat extends AdvancedTableFormat，WriteableTableFormat {
} 
  

您可以将对象返回新的界面。

 返回对象为PersonalizedTableFormat; 
  

I would like to implement a Glazed List that has both an AdvancedTableFormat and WritableTableFormat interface.

I am reading here: http://www.jroller.com/aalmiray/entry/glazedlists_groovy_not_your_regular

and for one interface it seems this is possible in Groovy with the "as" keyword:

# return new EventTableModel(linksList, [  
#       getColumnCount: {columnNames.size()},  
#       getColumnName: {index -> columnNames[index]},  
#       getColumnValue: {object, index ->  
#          object."${columnNames[index].toLowerCase()}"  
#       }] as TableFormat)

Is it somehow possible to do this for two interfaces? If so how?

Thank you!

Misha

解决方案

You can create a new interface that extends the two interfaces you are interested in.

interface PersonalizedTableFormat extends AdvancedTableFormat, WriteableTableFormat {
}

You can cast the object you return to the new interface.

return object as PersonalizedTableFormat;

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