LMS-1386 introduce TableCellUtil

SVN: 14730

openbis/source/java/ch/systemsx/cisd/openbis/generic/shared/util/TableCellUtil.java

+/*
+ * Copyright 2010 ETH Zuerich, CISD
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package ch.systemsx.cisd.openbis.generic.shared.util;
+
+import ch.systemsx.cisd.openbis.generic.shared.basic.dto.DoubleTableCell;
+import ch.systemsx.cisd.openbis.generic.shared.basic.dto.ISerializableComparable;
+import ch.systemsx.cisd.openbis.generic.shared.basic.dto.IntegerTableCell;
+import ch.systemsx.cisd.openbis.generic.shared.basic.dto.StringTableCell;
+
+/**
+ * Utility functions for table cells.
+ *
+ * @author Franz-Josef Elmer
+ */
+public class TableCellUtil
+{
+    /**
+     * Returns an appropriate table cell for the specified string token. If it can be parsed as
+     * an integer number a {@link IntegerTableCell} is returned. If it can be parsed as a floating
+     * point number a {@link DoubleTableCell} is returned. Otherwise a {@link StringTableCell}
+     * is returned.
+     */
+    public static ISerializableComparable createTableCell(String token)
+    {
+        try
+        {
+            return new IntegerTableCell(Long.parseLong(token));
+        } catch (NumberFormatException ex)
+        {
+            try
+            {
+                return new DoubleTableCell(Double.parseDouble(token));
+            } catch (NumberFormatException ex1)
+            {
+                // ignored
+            }
+        }
+        return new StringTableCell(token);
+    }
+    
+    private TableCellUtil()
+    {
+    }
+
+}