org.argeo.security.core/src/org/argeo/util/naming/LdifWriter.java

   1 package org.argeo.util.naming;
   2
   3 import static org.argeo.osgi.useradmin.LdifName.dn;
   4
   5 import java.io.IOException;
   6 import java.io.OutputStream;
   7 import java.io.OutputStreamWriter;
   8 import java.io.Writer;
   9
  10 import javax.naming.NamingEnumeration;
  11 import javax.naming.NamingException;
  12 import javax.naming.directory.Attribute;
  13 import javax.naming.directory.Attributes;
  14 import javax.naming.ldap.LdapName;
  15 import javax.naming.ldap.Rdn;
  16
  17 import org.apache.commons.codec.binary.Base64;
  18 import org.argeo.osgi.useradmin.UserDirectoryException;
  19
  20 /** Basic LDIF writer */
  21 public class LdifWriter {
  22         private final Writer writer;
  23
  24         /** Writer must be closed by caller */
  25         public LdifWriter(Writer writer) {
  26                 this.writer = writer;
  27         }
  28
  29         /** Stream must be closed by caller */
  30         public LdifWriter(OutputStream out) {
  31                 this(new OutputStreamWriter(out));
  32         }
  33
  34         public void writeEntry(LdapName name, Attributes attributes) throws IOException {
  35                 try {
  36                         // check consistency
  37                         Rdn nameRdn = name.getRdn(name.size() - 1);
  38                         Attribute nameAttr = attributes.get(nameRdn.getType());
  39                         if (!nameAttr.get().equals(nameRdn.getValue()))
  40                                 throw new UserDirectoryException(
  41                                                 "Attribute " + nameAttr.getID() + "=" + nameAttr.get() + " not consistent with DN " + name);
  42
  43                         writer.append(dn.name() + ":").append(name.toString()).append('\n');
  44                         Attribute objectClassAttr = attributes.get("objectClass");
  45                         if (objectClassAttr != null)
  46                                 writeAttribute(objectClassAttr);
  47                         for (NamingEnumeration<? extends Attribute> attrs = attributes.getAll(); attrs.hasMore();) {
  48                                 Attribute attribute = attrs.next();
  49                                 if (attribute.getID().equals(dn.name()) || attribute.getID().equals("objectClass"))
  50                                         continue;// skip DN attribute
  51                                 writeAttribute(attribute);
  52                         }
  53                         writer.append('\n');
  54                         writer.flush();
  55                 } catch (NamingException e) {
  56                         throw new UserDirectoryException("Cannot write LDIF", e);
  57                 }
  58         }
  59
  60         protected void writeAttribute(Attribute attribute) throws NamingException, IOException {
  61                 for (NamingEnumeration<?> attrValues = attribute.getAll(); attrValues.hasMore();) {
  62                         Object value = attrValues.next();
  63                         if (value instanceof byte[]) {
  64                                 String encoded = Base64.encodeBase64String((byte[]) value);
  65                                 writer.append(attribute.getID()).append("::").append(encoded).append('\n');
  66                         } else {
  67                                 writer.append(attribute.getID()).append(':').append(value.toString()).append('\n');
  68                         }
  69                 }
  70         }
  71 }