| // Copyright 2004 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 |
| * @version $Id$ |
| * @author mindbridge |
| * @since 2.3 |
| */ |
| public class SimpleTableValueRendererSource implements ITableRendererSource |
| { |
| /** |
| * 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()); |
| } |
| |
| } |