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* Licensed to the Apache Software Foundation (ASF) under one
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* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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
*
* https://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
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package org.apache.cayenne.swing;
import java.awt.Component;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
import javax.swing.table.TableColumnModel;
import javax.swing.table.TableModel;
import org.apache.cayenne.util.Util;
/**
* A binding for a JTable.
*
*/
public class TableBinding extends BindingBase {
/**
* A variable exposed in the context of set/get cell value.
*/
public static final String ITEM_VAR = "item";
protected JTable table;
protected String[] headers;
protected BindingExpression[] columns;
protected boolean[] editableState;
protected Class[] columnClass;
protected List list;
public TableBinding(JTable table, String listBinding, String[] headers,
BindingExpression[] columns, Class[] columnClass, boolean[] editableState,
Object[] sampleLongValues) {
super(listBinding);
this.table = table;
this.headers = headers;
this.columns = columns;
this.editableState = editableState;
this.columnClass = columnClass;
table.setModel(new BoundTableModel());
resizeColumns(sampleLongValues);
}
protected void resizeColumns(Object[] sampleLongValues) {
TableCellRenderer headerRenderer = table.getTableHeader().getDefaultRenderer();
TableColumnModel columnModel = table.getColumnModel();
TableModel tableModel = table.getModel();
for (int i = 0; i < columnModel.getColumnCount(); i++) {
TableColumn column = columnModel.getColumn(i);
Component header = headerRenderer.getTableCellRendererComponent(null, column
.getHeaderValue(), false, false, 0, 0);
int headerWidth = header.getPreferredSize().width;
if (sampleLongValues[i] != null) {
Component bigCell = table
.getDefaultRenderer(tableModel.getColumnClass(i))
.getTableCellRendererComponent(
table,
sampleLongValues[i],
false,
false,
0,
i);
int cellWidth = bigCell.getPreferredSize().width;
column.setPreferredWidth(Math.max(headerWidth, cellWidth));
}
else {
column.setPreferredWidth(headerWidth);
}
}
}
public void setContext(Object object) {
super.setContext(object);
this.list = updateList();
}
public Component getView() {
return table;
}
public void updateView() {
this.list = updateList();
((BoundTableModel) table.getModel()).fireTableDataChanged();
}
int getListSize() {
return (list != null) ? list.size() : 0;
}
List updateList() {
if (getContext() == null) {
return null;
}
Object list = getValue();
if (list == null) {
return null;
}
if (list instanceof List) {
return (List) list;
}
if (list instanceof Object[]) {
Object[] objects = (Object[]) list;
return Arrays.asList(objects);
}
if (list instanceof Collection) {
return new ArrayList((Collection) list);
}
throw new BindingException("List expected, got - " + list);
}
final class BoundTableModel extends AbstractTableModel {
// this map is used as "flyweight", providing on the spot context for Ognl
// expression evaluation
Map listContext = new HashMap(){{put(ITEM_VAR, null);}};
public int getColumnCount() {
return headers.length;
}
public int getRowCount() {
return getListSize();
}
public boolean isCellEditable(int rowIndex, int columnIndex) {
return editableState[columnIndex];
}
public Object getValueAt(int rowIndex, int columnIndex) {
Object item = list.get(rowIndex);
listContext.put(ITEM_VAR, item);
return columns[columnIndex].getValue(getContext(), listContext);
}
public String getColumnName(int column) {
// per CAY-513 - if an empty string is passed for header, table header will
// have zero height on Windows... So we have to check for this condition
return Util.isEmptyString(headers[column]) ? " " : headers[column];
}
public Class getColumnClass(int columnIndex) {
return columnClass[columnIndex];
}
public void setValueAt(Object value, int rowIndex, int columnIndex) {
Object item = list.get(rowIndex);
listContext.put(ITEM_VAR, item);
columns[columnIndex].setValue(getContext(), listContext, value);
}
}
}
