使用SIMPLE XML库为Android解析不同命名的元素作为单个列表

时间:2013-06-12 15:00:27

标签: java android xml simple-framework

我想知道是否有使用SIMPLE XML Library for Android将col_1,col_2等作为列表而不是单独的元素处理。我一直在阅读有关替换的内容,但我仍然感到困惑。

当前格式:

<box-headers 
   dataTable="boxscore" 
   col_1="FINAL" 
   col_2="1" 
   col_3="2" 
   col_4="3" 
   col_5="4" 
   col_6="5" 
   col_7="6" 
   col_8="7" 
   col_9="8" 
   col_10="9" 
   col_11="R" 
   col_12="H" 
   col_13="E">
             table
 </box-headers>

我希望能够将col作为某种列表解析出来,这样我就可以处理任意数量的cols。这可能吗?

1 个答案:

答案 0 :(得分:2)

正如 ng 之前所述:为此使用Converter。简单就是让您自定义处理的每一步(另一方面,它可以让您(甚至)使用一些代码行(甚至)复杂的结构序列化。)

所以这是一个例子:

将保留列表中值的类:

@Root(name = "example")
@Convert(value = ListConverter.class) // Specify the Converter that's used for this class
public class Example
{
    // This element will be set with the values from 'box-headers' element
    @ElementList(name = "box-headers")
    private List<String> values;


    // This constructor is used to set the values while de-serializing
    // You can also use setters instead
    Example(List<String> values)
    {
        this.values = values;
    }

    //...
}

Converter

public class ExampleConverter implements Converter<Example>
{
    @Override
    public Example read(InputNode node) throws Exception
    {
        List<String> list = new ArrayList<>(); // List to insert the 'col_' values

        NodeMap<InputNode> attributes = node.getAttributes(); // All attributes of the node
        Iterator<String> itr = attributes.iterator();

        while( itr.hasNext() ) // Iterate over all attributes
        {
            final String name = itr.next(); // The name of the attribute

            if( name.startsWith("col_") ) // Check if it is a 'col' attribute
            {
                // Insert the value of the 'col_' attribute
                list.add(attributes.get(name).getValue());
            }
        }

        // Return the result - instead of a constructor you can use setter(s) too
        return new Example(list); 
    }


    @Override
    public void write(OutputNode node, Example value) throws Exception
    {
        // TODO: Implement serializing here - only required if you want to serialize too
    }
}

使用方法:

// Serializer, don't forget `AnnotationStrategy` - without it wont work
Serializer ser = new Persister(new AnnotationStrategy());

// Deserialize the object - here the XML is readen from a file, other sources are possible
Example ex = ser.read(Example.class, new File("test.xml")); 

此示例仅使用col_xy属性,其他所有内容都将被删除。如果您也需要这些值,则很容易实现它们。您只需从InputNode检索它们并将它们设置为输出。