// Copyright 2004, 2005 The Apache Software Foundation
//
// 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 org.apache.tapestry.contrib.table.model.simple;
import org.apache.tapestry.IRender;
import org.apache.tapestry.IRequestCycle;
import org.apache.tapestry.contrib.table.model.ITableColumn;
import org.apache.tapestry.contrib.table.model.ITableModelSource;
import org.apache.tapestry.contrib.table.model.ITableRendererSource;
import org.apache.tapestry.valid.RenderString;
/**
* This is a simple implementation of
* {@link org.apache.tapestry.contrib.table.model.ITableRendererSource} that
* returns a standard renderer of a column value. This implementation requires
* that the column passed is of type SimpleTableColumn
*
* @see org.apache.tapestry.contrib.table.model.common.AbstractTableColumn
* @author mindbridge
* @since 2.3
*/
public class SimpleTableValueRendererSource implements ITableRendererSource
{
private static final long serialVersionUID = 1L;
/**
* The representation of null values. This is geared towards HTML, but will
* work for some other *ML languages as well. In any case, changing the
* column's value renderer allows selecting fully custom rendering
* behaviour.
*/
private static final String EMPTY_REPRESENTATION = " ";
/**
* @see org.apache.tapestry.contrib.table.model.ITableRendererSource#getRenderer(IRequestCycle,
* ITableModelSource, ITableColumn, Object)
*/
public IRender getRenderer(IRequestCycle objCycle,
ITableModelSource objSource, ITableColumn objColumn, Object objRow)
{
SimpleTableColumn objSimpleColumn = (SimpleTableColumn) objColumn;
Object objValue = objSimpleColumn.getColumnValue(objRow);
if (objValue == null)
return new RenderString(EMPTY_REPRESENTATION, true);
return new RenderString(objValue.toString());
}
}