Pull request #1792: REPORT-34465 预览视图页面无法关闭

Merge in DESIGN/design from ~HADES/design:bugfix/10.0 to bugfix/10.0

* commit '197cb420144c5ec4825ff66fb3b8663166670f9d':
  REPORT-34465 预览视图页面无法关闭

designer-base/src/main/java/com/fr/design/data/datapane/preview/PreviewTableModel.java

@@ -17,6 +17,10 @@ import javax.swing.table.AbstractTableModel;
  * 这个TableModel主要是预览数据的. 字段TableData必须转化为内置的
  */
 public class PreviewTableModel extends AbstractTableModel {
+
+    private static final int LEN_LIMIT = 1000;
+    private static final String THREE_DOT = "...";
+
     private DataModel dataModel;
     private String erroMessage = null;
 
@@ -127,11 +131,21 @@ public class PreviewTableModel extends AbstractTableModel {
 
     public Object getValueAt(int row, int column) {
         try {
-            return dataModel.getValueAt(row, column);
+            Object value = dataModel.getValueAt(row, column);
+            if (value != null) {
+                String strValue = value.toString();
+                // 字符长度过长 swing会卡住一会
+                // 同时设计器内预览展示也不需要展示太长的字符
+                if (strValue.length() > LEN_LIMIT) {
+                    strValue = strValue.substring(0, LEN_LIMIT) + THREE_DOT;
+                    return strValue;
+                }
+            }
+            return value;
         } catch (TableDataException e) {
             FineLoggerFactory.getLogger().error(e.getMessage(), e);
             DesignUtils.errorMessage(e.getMessage());
-            return "";
+            return StringUtils.EMPTY;
         }
     }