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ITableDataSource

Interface ITableDataSource

public interface ITableDataSource
Represents a custom table data source.

Classes that implement this interface can be used as a ResultSet -like data source for template processing. An ITableDataSource exposes tabular data through row and column indexes, together with column metadata, so that it can be added to a workbook by using Workbook.addDataSource(String,Object).


 class ExampleTableDataSource implements ITableDataSource {
     private final Object[][] data = {
         { "Alice" },
         { "Bob" }
     };

     private final String[] columns = { "Customer" };

     public Object getValue(int row, int column) {
         return data[row][column];
     }

     public int getRowCount() {
         return data.length;
     }

     public int getColumnCount() {
         return columns.length;
     }

     public String getColumnName(int column) {
         return columns[column];
     }

     public int getColumnIndex(String columnName) {
         return java.util.Arrays.asList(columns).indexOf(columnName);
     }
 }

 ITableDataSource dataSource = new ExampleTableDataSource();
 workbook.addDataSource("customers", dataSource);

  • Method Details

    • getValue

      Object getValue(int row, int column)
      Gets a value from the data source. 
      
 ITableDataSource dataSource = new ExampleTableDataSource();
 Object value = dataSource.getValue(0, 0);
      Parameters:
      row - start from 0
      column - start from 0
      Returns:
      value

    • getRowCount

      int getRowCount()
      Gets the row count. 
      
 ITableDataSource dataSource = new ExampleTableDataSource();
 int rowCount = dataSource.getRowCount();
      Returns:
      row count

    • getColumnCount

      int getColumnCount()
      Gets the column count. 
      
 ITableDataSource dataSource = new ExampleTableDataSource();
 int columnCount = dataSource.getColumnCount();
      Returns:
      column count

    • getColumnName

      String getColumnName(int column)
      Gets the column name. 
      
 ITableDataSource dataSource = new ExampleTableDataSource();
 String columnName = dataSource.getColumnName(0);
      Parameters:
      column - start from 0
      Returns:
      column name

    • getColumnIndex

      int getColumnIndex(String columnName)
      Gets the column index. 
      
 ITableDataSource dataSource = new ExampleTableDataSource();
 int columnIndex = dataSource.getColumnIndex("Customer");
      Parameters:
      columnName - The column name.
      Returns:
      The column index.