Mega Code Archive
This program demonstrates access to a hierarchical database through LDAP
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/*
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
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