GWT生成动态CellTable

时间:2011-07-20 09:12:19

标签: xml gwt javabeans gwt-2.2-celltable

我想从xml生成动态单元格表​​

我的xml包含N个列(详情如下:列名,列类型,可排序,isEditable(Y / N),单元格值等,

问题是如何从变量(动态)xml生成GWT中的Cell Table 即在创建Cell Table时,我们不知道有多少列,我们不知道有类型,isEditable,isSortable等。

我可以解析xml。现在我想生成动态表 我创建了BeanInfo类,用于getter和setter。 我如何为这些动态列(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如下:

&LT; ?xml version =“1.0”encoding =“UTF-8”?&gt;

&LT; Data neutralizedCatalog =“Repository”&gt;

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

如何基于xml生成动态getter和setter,并在celltable中用于显示/更新值

1 个答案:

答案 0 :(得分:0)

解析XML。将数据获取到列信息对象的ArrayList中(例如)。

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

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

对于每列,根据类型和参数,将列添加到cellTable

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);
}