Java tutorial
/*
This program is a part of the companion code for Core Java 8th ed.
(http://horstmann.com/corejava)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.util.*;
import javax.naming.*;
import javax.naming.directory.*;
import javax.swing.*;
/**
* This program demonstrates access to a hierarchical database through LDAP
* @version 1.01 2007-06-28
* @author Cay Horstmann
*/
public class LDAPTest {
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
JFrame frame = new LDAPFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
});
}
}
/**
* The frame that holds the data panel and the navigation buttons.
*/
class LDAPFrame extends JFrame {
public LDAPFrame() {
setTitle("LDAPTest");
setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
JPanel northPanel = new JPanel();
northPanel.setLayout(new java.awt.GridLayout(1, 2, 3, 1));
northPanel.add(new JLabel("uid", SwingConstants.RIGHT));
uidField = new JTextField();
northPanel.add(uidField);
add(northPanel, BorderLayout.NORTH);
JPanel buttonPanel = new JPanel();
add(buttonPanel, BorderLayout.SOUTH);
findButton = new JButton("Find");
findButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
findEntry();
}
});
buttonPanel.add(findButton);
saveButton = new JButton("Save");
saveButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
saveEntry();
}
});
buttonPanel.add(saveButton);
deleteButton = new JButton("Delete");
deleteButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
deleteEntry();
}
});
buttonPanel.add(deleteButton);
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent event) {
try {
if (context != null)
context.close();
} catch (NamingException e) {
e.printStackTrace();
}
}
});
}
/**
* Finds the entry for the uid in the text field.
*/
public void findEntry() {
try {
if (scrollPane != null)
remove(scrollPane);
String dn = "uid=" + uidField.getText() + ",ou=people,dc=mycompany,dc=com";
if (context == null)
context = getContext();
attrs = context.getAttributes(dn);
dataPanel = new DataPanel(attrs);
scrollPane = new JScrollPane(dataPanel);
add(scrollPane, BorderLayout.CENTER);
validate();
uid = uidField.getText();
} catch (NamingException e) {
JOptionPane.showMessageDialog(this, e);
} catch (IOException e) {
JOptionPane.showMessageDialog(this, e);
}
}
/**
* Saves the changes that the user made.
*/
public void saveEntry() {
try {
if (dataPanel == null)
return;
if (context == null)
context = getContext();
if (uidField.getText().equals(uid)) // update existing entry
{
String dn = "uid=" + uidField.getText() + ",ou=people,dc=mycompany,dc=com";
Attributes editedAttrs = dataPanel.getEditedAttributes();
NamingEnumeration<? extends Attribute> attrEnum = attrs.getAll();
while (attrEnum.hasMore()) {
Attribute attr = attrEnum.next();
String id = attr.getID();
Attribute editedAttr = editedAttrs.get(id);
if (editedAttr != null && !attr.get().equals(editedAttr.get()))
context.modifyAttributes(dn, DirContext.REPLACE_ATTRIBUTE,
new BasicAttributes(id, editedAttr.get()));
}
} else
// create new entry
{
String dn = "uid=" + uidField.getText() + ",ou=people,dc=mycompany,dc=com";
attrs = dataPanel.getEditedAttributes();
Attribute objclass = new BasicAttribute("objectClass");
objclass.add("uidObject");
objclass.add("person");
attrs.put(objclass);
attrs.put("uid", uidField.getText());
context.createSubcontext(dn, attrs);
}
findEntry();
} catch (NamingException e) {
JOptionPane.showMessageDialog(LDAPFrame.this, e);
e.printStackTrace();
} catch (IOException e) {
JOptionPane.showMessageDialog(LDAPFrame.this, e);
e.printStackTrace();
}
}
/**
* Deletes the entry for the uid in the text field.
*/
public void deleteEntry() {
try {
String dn = "uid=" + uidField.getText() + ",ou=people,dc=mycompany,dc=com";
if (context == null)
context = getContext();
context.destroySubcontext(dn);
uidField.setText("");
remove(scrollPane);
scrollPane = null;
repaint();
} catch (NamingException e) {
JOptionPane.showMessageDialog(LDAPFrame.this, e);
e.printStackTrace();
} catch (IOException e) {
JOptionPane.showMessageDialog(LDAPFrame.this, e);
e.printStackTrace();
}
}
/**
* Gets a context from the properties specified in the file ldapserver.properties
* @return the directory context
*/
public static DirContext getContext() throws NamingException, IOException {
Properties props = new Properties();
FileInputStream in = new FileInputStream("ldapserver.properties");
props.load(in);
in.close();
String url = props.getProperty("ldap.url");
String username = props.getProperty("ldap.username");
String password = props.getProperty("ldap.password");
Hashtable<String, String> env = new Hashtable<String, String>();
env.put(Context.SECURITY_PRINCIPAL, username);
env.put(Context.SECURITY_CREDENTIALS, password);
DirContext initial = new InitialDirContext(env);
DirContext context = (DirContext) initial.lookup(url);
return context;
}
public static final int DEFAULT_WIDTH = 300;
public static final int DEFAULT_HEIGHT = 200;
private JButton findButton;
private JButton saveButton;
private JButton deleteButton;
private JTextField uidField;
private DataPanel dataPanel;
private Component scrollPane;
private DirContext context;
private String uid;
private Attributes attrs;
}
/**
* This panel displays the contents of a result set.
*/
class DataPanel extends JPanel {
/**
* Constructs the data panel.
* @param attributes the attributes of the given entry
*/
public DataPanel(Attributes attrs) throws NamingException {
setLayout(new java.awt.GridLayout(0, 2, 3, 1));
NamingEnumeration<? extends Attribute> attrEnum = attrs.getAll();
while (attrEnum.hasMore()) {
Attribute attr = attrEnum.next();
String id = attr.getID();
NamingEnumeration<?> valueEnum = attr.getAll();
while (valueEnum.hasMore()) {
Object value = valueEnum.next();
if (id.equals("userPassword"))
value = new String((byte[]) value);
JLabel idLabel = new JLabel(id, SwingConstants.RIGHT);
JTextField valueField = new JTextField("" + value);
if (id.equals("objectClass"))
valueField.setEditable(false);
if (!id.equals("uid")) {
add(idLabel);
add(valueField);
}
}
}
}
public Attributes getEditedAttributes() {
Attributes attrs = new BasicAttributes();
for (int i = 0; i < getComponentCount(); i += 2) {
JLabel idLabel = (JLabel) getComponent(i);
JTextField valueField = (JTextField) getComponent(i + 1);
String id = idLabel.getText();
String value = valueField.getText();
if (id.equals("userPassword"))
attrs.put("userPassword", value.getBytes());
else if (!id.equals("") && !id.equals("objectClass"))
attrs.put(id, value);
}
return attrs;
}
}
//File: ldapserver.properties
ldap.username=cn=Manager,dc=mycompany,dc=com ldap.password=secret ldap.url=ldap://localhost:389
//File sample.ldif
#
Define top-level entry dn:dc=mycompany,dc=com
objectClass:
dcObject
objectClass:
organization
dc:
mycompany
o:
Core Java Team
#
Define an
entry to
contain people#searches for
users are
based on this
entry dn:ou=people,dc=mycompany,dc=com
objectClass:
organizationalUnit
ou:people
#
Define a
user entry for
John Q.
Public
dn:uid=jqpublic,ou=people,dc=mycompany,dc=com
objectClass:
person
objectClass:
uidObject
uid:
jqpublic
sn:
Public
cn:
John Q.
Public
telephoneNumber:+1 408 555 0017 userPassword:wombat
#
Define a
user entry for
Jane Doe dn:uid=jdoe,ou=people,dc=mycompany,dc=com
objectClass:
person
objectClass:
uidObject
uid:
jdoe
sn:
Doe
cn:
Jane Doe telephoneNumber:+1 408 555 0029 userPassword:heffalump
#
Define an
entry to
contain LDAP groups#searches for
roles are
based on this
entry dn:ou=groups,dc=mycompany,dc=com
objectClass:
organizationalUnit
ou:groups
#
Define an entry for the"techstaff"
group dn:cn=techstaff,ou=groups,dc=mycompany,dc=com
objectClass:
groupOfUniqueNames
cn:
techstaff
uniqueMember:uid=jdoe,ou=people,dc=mycompany,dc=com
#
Define an entry for the"staff"
group dn:cn=staff,ou=groups,dc=mycompany,dc=com
objectClass:
groupOfUniqueNames
cn:
staff
uniqueMember:uid=jqpublic,ou=people,dc=mycompany,dc=com
uniqueMember:uid=jdoe,ou=people,dc=mycompany,dc=com