JTable、RowFilter 和 RowFilter.Entry [英] JTable, RowFilter and RowFilter.Entry
问题描述
请我有一个关于的问题RowFilter(它的比较类型) 放在一起
- 正则表达式(字符串)、数字、日期
一起
- AND、OR、NOR
不知道怎么样
- 处理 AND、OR、NOR 的空值
- 如果 Regex(String)、Number、Date 具有相同的逻辑或存在小差异"
- 特别是如何比较日期值
欢迎提供更长更详细的描述
some longer and detailed descriptions are welcome
在这个 SSCCE 中查看我的基本问题到 frame.add(new JButton(new AbstractAction("切换过滤器") {
in this SSCCE to see my basic issues into frame.add(new JButton(new AbstractAction("Toggle filter") {
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.util.Calendar;
import java.util.Date;
import javax.swing.*;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableModel;
import javax.swing.table.TableRowSorter;
public class JTableFilterDemo {
private static TableRowSorter<TableModel> sorter;
private Object[][] data = {{"A", 5, true, new Date()},
{"B", 2, false, new Date()}, {"C", 4, false, new Date()},
{"D", 8, true, new Date()}, {"E", 13, false, new Date()},
{"F", 7, true, new Date()}, {"G", 55, false, new Date()},
{"H", 6, false, new Date()}, {"I", 1, true, new Date()}};
private String columnNames[] = {"Item", "Value", "Boolean", "Date"};
private TableModel model = new DefaultTableModel(data, columnNames) {
private static final long serialVersionUID = 1L;
@Override
public Class<?> getColumnClass(int column) {
switch (column) {
case 1:
return Integer.class;
case 2:
return Boolean.class;
case 3:
return Date.class;
default:
return String.class;
}
}
};
private JTable table = new JTable(model);
private Date modifDate = new Date();
public JTableFilterDemo() {
modifyDateInTable();
table.setPreferredScrollableViewportSize(table.getPreferredSize());
RowFilter<Object, Number> filter = new RowFilter<Object, Number>() {
@Override
public boolean include(RowFilter.Entry entry) {
//String str = (String) entry.getValue(0);//String
//return str.matches(("(?i)^a|^g"));//String
//Boolean bol = (Boolean) entry.getValue(2);//Boolean
//return bol.booleanValue() == false;//Boolean
//Date date = (Date) entry.getValue(3);//Date
//return date.getTime() > (long) (new Date().getTime());//Date
//return ((Number) entry.getValue(1)).intValue() % 2 == 0;//Integer
//return ((Number) entry.getValue(1)).intValue() > 0;//Integer
return ((Number) entry.getValue(1)).intValue() > 10
& ((Number) entry.getValue(1)).intValue() < 50;//AND with Integer
}
};
sorter = new TableRowSorter<TableModel>(model);
sorter.setRowFilter(filter);
table.setRowSorter(sorter);
JScrollPane scrollPane = new JScrollPane(table);
JFrame frame = new JFrame("Filtering Table");
frame.add(new JButton(new AbstractAction("Toggle filter") {
private static final long serialVersionUID = 1L;
private RowFilter<TableModel, Object> filter = new RowFilter<TableModel, Object>() {
@Override
public boolean include(javax.swing.RowFilter.Entry<? extends TableModel, ? extends Object> entry) {
//String str = (String) entry.getValue(0);//String
//return str.matches(("(?i)^a|^g"));//String
//Boolean bol = (Boolean) entry.getValue(2);//Boolean
//return bol.booleanValue() == false;//Boolean
//Date date = (Date) entry.getValue(3);//Date
//return date.getTime() > (long) (new Date().getTime());//Date
//return ((Number) entry.getValue(1)).intValue() % 2 == 0;//Integer
//return ((Number) entry.getValue(1)).intValue() > 0;//Integer
return ((Number) entry.getValue(1)).intValue() > 10
& ((Number) entry.getValue(1)).intValue() < 50;//AND with Integer
// ---> doesn't works
//return ((Number) entry.getValue(1)).intValue() > 10 |
//((Number) entry.getValue(1)).intValue() < 50;//OR with Integer
// ---> works, but initialized on 2nd. event
//return ((Number) entry.getValue(1)).intValue() > 10 !=
//((Number) entry.getValue(1)).intValue() < 50;//NOR with Integer
}
};
@Override
public void actionPerformed(ActionEvent e) {
if (sorter.getRowFilter() != null) {
sorter.setRowFilter(null);
} else {
sorter.setRowFilter(filter);
}
}
}), BorderLayout.SOUTH);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(scrollPane);
frame.pack();
frame.setVisible(true);
}
private void modifyDateInTable() {
Calendar c = Calendar.getInstance();
c.setTime(modifDate);
c.add(Calendar.DATE, - 1);
modifDate = c.getTime();
table.setValueAt(modifDate, 0, 3);
c.setTime(modifDate);
c.add(Calendar.DATE, +5);
modifDate = c.getTime();
table.setValueAt(modifDate, 1, 3);
c.setTime(modifDate);
c.add(Calendar.DATE, +1);
modifDate = c.getTime();
table.setValueAt(modifDate, 2, 3);
c.setTime(modifDate);
c.add(Calendar.DATE, - 16);
modifDate = c.getTime();
table.setValueAt(modifDate, 3, 3);
c.setTime(modifDate);
c.add(Calendar.DATE, +30);
modifDate = c.getTime();
table.setValueAt(modifDate, 4, 3);
c.setTime(modifDate);
c.add(Calendar.DATE, +55);
modifDate = c.getTime();
table.setValueAt(modifDate, 5, 3);
c.setTime(modifDate);
c.add(Calendar.DATE, +155);
modifDate = c.getTime();
table.setValueAt(modifDate, 6, 3);
c.setTime(modifDate);
c.add(Calendar.DATE, -23);
modifDate = c.getTime();
table.setValueAt(modifDate, 7, 3);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
JTableFilterDemo jtfd = new JTableFilterDemo();
}
});
}
}
推荐答案
我没有看到意外的结果.
I see no unexpected result.
第一个谓词很简单;它包括两个重叠集合的交集,其中行具有
Value 13
作为唯一成员.
The first predicate is straightforward; it includes the intersection of two overlapping sets, with the row having
Value 13
as the only member.
return ((Number) entry.getValue(1)).intValue() > 10
& ((Number) entry.getValue(1)).intValue() < 50;
第二个谓词是两个重叠集合的并集,包括所有行.
return ((Number) entry.getValue(1)).intValue() > 10 |
((Number) entry.getValue(1)).intValue() < 50;
第三个谓词是第一个谓词的补语,具有Value 13
的行交替包含和排除.
The third predicate is the complement of the first, with the row having Value 13
alternately included and excluded.
return ((Number) entry.getValue(1)).intValue() > 10 !=
((Number) entry.getValue(1)).intValue() < 50;
附录:关于 RowFilter.Entry
,我发现检查 and、or 和 not 工厂使用私有类RowFilter.GeneralFilter
中定义的额外index
参数;每个子类为构造函数中提供的每个过滤器调用父类的 include()
实现.相比之下,date、number 和 regex 工厂没有;相反,每个都依赖于可用于基础类型的谓词.
Addendum: Regarding RowFilter.Entry
, I found it helpful to examine how the and, or and not factories use the extra index
parameter defined in the private class RowFilter.GeneralFilter
; each subclass invokes the parent's implementation of include()
for each filter supplied in the constructor. In contrast, the date, number and regex factories do not; instead, each relies on predicates available to the underlying type.
附录:作为一个具体的例子,选择两个模型日期,例如第一个和倒数第二个.
Addendum: As a concrete example, select two model dates, e.g. the first and penultimate.
Date d1 = (Date) model.getValueAt(0, 3);
Date d2 = (Date) model.getValueAt(model.getRowCount() - 2, 3);
创建两个过滤器,将所选日期括起来.
Create two filters that bracket the chosen dates.
RowFilter<TableModel, Integer> low =
RowFilter.dateFilter(RowFilter.ComparisonType.AFTER, d1, 3);
RowFilter<TableModel, Integer> high =
RowFilter.dateFilter(RowFilter.ComparisonType.BEFORE, d2, 3);
将它们组合在 andFilter
中.
List<RowFilter<TableModel, Integer>> filters = Arrays.asList(low, high);
final RowFilter<TableModel, Integer> filter = RowFilter.andFilter(filters);
结果选择 d1
和 d2
之间但不包括的行.
The result selects rows between, but excluding, d1
and d2
.
修改后的 SSCCE:
Modified SSCCE:
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.util.Arrays;
import java.util.Calendar;
import java.util.Date;
import java.util.List;
import javax.swing.*;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableModel;
import javax.swing.table.TableRowSorter;
public class JTableFilterDemo {
private static TableRowSorter<TableModel> sorter;
private Object[][] data = {{"A", 5, true, new Date()},
{"B", 2, false, new Date()}, {"C", 4, false, new Date()},
{"D", 8, true, new Date()}, {"E", 13, false, new Date()},
{"F", 7, true, new Date()}, {"G", 55, false, new Date()},
{"H", 6, false, new Date()}, {"I", 1, true, new Date()}};
private String columnNames[] = {"Item", "Value", "Boolean", "Date"};
private TableModel model = new DefaultTableModel(data, columnNames) {
@Override
public Class<?> getColumnClass(int column) {
switch (column) {
case 1:
return Integer.class;
case 2:
return Boolean.class;
case 3:
return Date.class;
default:
return String.class;
}
}
};
private JTable table = new JTable(model);
public JTableFilterDemo() {
modifyDateInTable();
table.setPreferredScrollableViewportSize(table.getPreferredSize());
sorter = new TableRowSorter<TableModel>(model);
table.setRowSorter(sorter);
Date d1 = (Date) model.getValueAt(0, 3);
Date d2 = (Date) model.getValueAt(model.getRowCount() - 2, 3);
RowFilter<TableModel, Integer> low = RowFilter.dateFilter(RowFilter.ComparisonType.AFTER, d1, 3);
RowFilter<TableModel, Integer> high = RowFilter.dateFilter(RowFilter.ComparisonType.BEFORE, d2, 3);
List<RowFilter<TableModel, Integer>> filters = Arrays.asList(low, high);
final RowFilter<TableModel, Integer> filter = RowFilter.andFilter(filters);
JScrollPane scrollPane = new JScrollPane(table);
JFrame frame = new JFrame("Filtering Table");
frame.add(new JButton(new AbstractAction("Toggle filter") {
@Override
public void actionPerformed(ActionEvent e) {
if (sorter.getRowFilter() != null) {
sorter.setRowFilter(null);
} else {
sorter.setRowFilter(filter);
}
}
}), BorderLayout.SOUTH);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(scrollPane);
frame.pack();
frame.setLocationByPlatform(true);
frame.setVisible(true);
}
private void modifyDateInTable() {
Date modifDate = new Date();
Calendar c = Calendar.getInstance();
c.setTime(modifDate);
c.add(Calendar.DATE, - 1);
modifDate = c.getTime();
table.setValueAt(modifDate, 0, 3);
c.setTime(modifDate);
c.add(Calendar.DATE, +5);
modifDate = c.getTime();
table.setValueAt(modifDate, 1, 3);
c.setTime(modifDate);
c.add(Calendar.DATE, +1);
modifDate = c.getTime();
table.setValueAt(modifDate, 2, 3);
c.setTime(modifDate);
c.add(Calendar.DATE, - 16);
modifDate = c.getTime();
table.setValueAt(modifDate, 3, 3);
c.setTime(modifDate);
c.add(Calendar.DATE, +30);
modifDate = c.getTime();
table.setValueAt(modifDate, 4, 3);
c.setTime(modifDate);
c.add(Calendar.DATE, +55);
modifDate = c.getTime();
table.setValueAt(modifDate, 5, 3);
c.setTime(modifDate);
c.add(Calendar.DATE, +155);
modifDate = c.getTime();
table.setValueAt(modifDate, 6, 3);
c.setTime(modifDate);
c.add(Calendar.DATE, -23);
modifDate = c.getTime();
table.setValueAt(modifDate, 7, 3);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
JTableFilterDemo jtfd = new JTableFilterDemo();
}
});
}
}
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