GWT生成动态CellTable



我想从xml生成动态单元格表

我的xml包含N个列(详细信息如-列名称,列类型,可排序,可编辑(Y/N),单元格值等),

问题是如何从变体(动态)xml生成GWT中的单元格表例如,在创建Cell Table时,我们不知道有多少列,也不知道它的类型,isEditable, isSortable等。

我可以解析xml。现在我要生成动态表我创建了BeanInfo类,它用于getter和setter。如何为这些动态列(Bean的属性)创建动态getter和setter,以及如何在Bean中设置值?

伪代码:

// dynamic column. 
    final Column<BeanInfo, String> dynamicGwtColumn = new Column<BeanInfo, String>(
            new DynamicDataTypeCell()) {
        @Override
        public String getValue(BeanInfo object) {
            return object.getDyncamicCellValue();
        }
    };
    dynamicGwtColumn .setSortable(true);
    sortHandler.setComparator(dynamicGwtColumn ,
            new Comparator<BeanInfo >() {
                public int compare(BeanInfo o1, BeanInfo o2) {
                    return o1..getDyncamicCellValue().compareTo(o2.getDyncamicCellValue());
                }
            });
    cellTable.addColumn(dynamicGwtColumn , "Record ID");

    dynamicGwtColumn 
            .setFieldUpdater(new FieldUpdater<BeanInfo, String>() {
                public void update(int index, BeanInfo object,
                        String value) {
                    // Called when the user changes the value.
                    object.setDyncamicCellValue(value);
                    dataProvider.refresh();
                }
            });

我的xml文件如下:

& lt;?xml version="1.0" encoding="UTF-8"?>

& lt;数据neutralizedCatalog = "库">

< MetaData>
  < RecordAttribute name="ID" displayname="ID" columnname="CID" datatype="VARCHAR2" sortable="true" accessmode="modify" showmvpd="false" length="255" integerlength="0" fractionallength="0" />
  < RecordAttribute name="Name" displayname="Name" columnname="CNAME" datatype="VARCHAR2" sortable="true" accessmode="modify" showmvpd="false" length="255" integerlength="0" fractionallength="0" />
  < RecordAttribute name="custom1" displayname="custom1" columnname="CCUSTOM1" datatype="VARCHAR2" sortable="true" accessmode="modify" showmvpd="false" length="256" integerlength="0" fractionallength="0" />
</MetaData>
     <Records>
     < RecordAttribute name="CID" edited="false">
        <Value />
      </RecordAttribute>
      < RecordAttribute name="CNAME" edited="false">
        <Value />
      </RecordAttribute>
      < RecordAttribute name="CCUSTOM1" edited="false">
        <Value />
      </RecordAttribute>
    </Record><Records> 
<Recordid="17" name="17" productkeyid="13012" selected="false" accessmode="modify" isedited="false">
      <RecordAttribute name="CID" edited="false">
        <Value>17</Value>
        <OldValue>17</OldValue>
      </RecordAttribute>
      <RecordAttribute name="CNAME" edited="false">
        <Value>17</Value>
        <OldValue>17</OldValue>
      </RecordAttribute>
      <RecordAttribute name="CCUSTOM1" edited="false">
        <Value>17</Value>
        <OldValue>17</OldValue>
      </RecordAttribute>
    </Record>

从上面的xml我想生成Celltable。在上面的xml示例中包含col名称,数据类型等和值。

如何生成基于xml的动态getter和setter,并在celltable中用于显示/更新值

解析XML。获取数据到列info对象的ArrayList中(例如)

columns.get(0).type - type of column 1
columns.get(0).name - name of column 1

对于每个列,根据类型和参数,在cellTable

中添加列
CellTable<BeanInfo> cellTable = new CellTable<BeanInfo >();
for(AxCol col : columns)) {
    Column<BeanInfo, java.lang.Object> cellTableColumn = null;
    AbstractCell cellTableCell = null;
    if(col.type == "string"){
        cellTableCell = new TextCell();
        cellTableColumn = new Column<BeanInfo, java.lang.Object>(cellTableCell) {
          @Override
          public String getValue(BeanInfo object) {
            return (BeanInfo) object.getValue();
          }
        };                              
    }
    if(col.type == "image"){
        cellTableCell = new ImageCell();
        cellTableColumn = new Column<BeanInfo, java.lang.Object>(cellTableCell) {
          @Override
          public String getValue(BeanInfo object) {
            return (BeanInfo) object.getValueForImage();
          }
        };                              
    }   
    cellTable.addColumn(cellTableColumn);
}

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