LdifParser.java

   1 package org.argeo.osgi.useradmin;
   2
   3 import static org.argeo.osgi.useradmin.LdifName.dn;
   4
   5 import java.io.IOException;
   6 import java.io.InputStream;
   7 import java.util.List;
   8 import java.util.SortedMap;
   9 import java.util.TreeMap;
  10
  11 import javax.naming.InvalidNameException;
  12 import javax.naming.NamingException;
  13 import javax.naming.directory.Attribute;
  14 import javax.naming.directory.Attributes;
  15 import javax.naming.directory.BasicAttribute;
  16 import javax.naming.directory.BasicAttributes;
  17 import javax.naming.ldap.LdapName;
  18 import javax.naming.ldap.Rdn;
  19
  20 import org.apache.commons.codec.binary.Base64;
  21 import org.apache.commons.io.IOUtils;
  22 import org.apache.commons.logging.Log;
  23 import org.apache.commons.logging.LogFactory;
  24
  25 /** Basic LDIF parser. */
  26 class LdifParser {
  27         private final static Log log = LogFactory.getLog(LdifParser.class);
  28
  29         protected Attributes addAttributes(SortedMap<LdapName, Attributes> res,
  30                         int lineNumber, LdapName currentDn, Attributes currentAttributes) {
  31                 try {
  32                         Rdn nameRdn = currentDn.getRdn(currentDn.size() - 1);
  33                         Attribute nameAttr = currentAttributes.get(nameRdn.getType());
  34                         if (nameAttr == null)
  35                                 currentAttributes.put(nameRdn.getType(), nameRdn.getValue());
  36                         else if (!nameAttr.get().equals(nameRdn.getValue()))
  37                                 throw new UserDirectoryException("Attribute "
  38                                                 + nameAttr.getID() + "=" + nameAttr.get()
  39                                                 + " not consistent with DN " + currentDn
  40                                                 + " (shortly before line " + lineNumber
  41                                                 + " in LDIF file)");
  42                         Attributes previous = res.put(currentDn, currentAttributes);
  43                         if (log.isTraceEnabled())
  44                                 log.trace("Added " + currentDn);
  45                         return previous;
  46                 } catch (NamingException e) {
  47                         throw new UserDirectoryException("Cannot add " + currentDn, e);
  48                 }
  49         }
  50
  51         static void checkDnConsistency() {
  52
  53         }
  54
  55         SortedMap<LdapName, Attributes> read(InputStream in) throws IOException {
  56                 SortedMap<LdapName, Attributes> res = new TreeMap<LdapName, Attributes>();
  57                 try {
  58                         List<String> lines = IOUtils.readLines(in);
  59                         // add an empty new line since the last line is not checked
  60                         if (!lines.get(lines.size() - 1).equals(""))
  61                                 lines.add("");
  62
  63                         LdapName currentDn = null;
  64                         Attributes currentAttributes = null;
  65                         StringBuilder currentEntry = new StringBuilder();
  66
  67                         readLines: for (int lineNumber = 0; lineNumber < lines.size(); lineNumber++) {
  68                                 String line = lines.get(lineNumber);
  69                                 boolean isLastLine = false;
  70                                 if (lineNumber == lines.size() - 1)
  71                                         isLastLine = true;
  72                                 if (line.startsWith(" ")) {
  73                                         currentEntry.append(line.substring(1));
  74                                         if (!isLastLine)
  75                                                 continue readLines;
  76                                 }
  77
  78                                 if (currentEntry.length() != 0 || isLastLine) {
  79                                         // read previous attribute
  80                                         StringBuilder attrId = new StringBuilder(8);
  81                                         boolean isBase64 = false;
  82                                         readAttrId: for (int i = 0; i < currentEntry.length(); i++) {
  83                                                 char c = currentEntry.charAt(i);
  84                                                 if (c == ':') {
  85                                                         if (i + 1 < currentEntry.length()
  86                                                                         && currentEntry.charAt(i + 1) == ':')
  87                                                                 isBase64 = true;
  88                                                         currentEntry.delete(0, i + (isBase64 ? 2 : 1));
  89                                                         break readAttrId;
  90                                                 } else {
  91                                                         attrId.append(c);
  92                                                 }
  93                                         }
  94
  95                                         String attributeId = attrId.toString();
  96                                         String cleanValueStr = currentEntry.toString().trim();
  97                                         Object attributeValue = isBase64 ? Base64
  98                                                         .decodeBase64(cleanValueStr) : cleanValueStr;
  99
 100                                         // manage DN attributes
 101                                         if (attributeId.equals(dn.name()) || isLastLine) {
 102                                                 if (currentDn != null) {
 103                                                         //
 104                                                         // ADD
 105                                                         //
 106                                                         Attributes previous = addAttributes(res,
 107                                                                         lineNumber, currentDn, currentAttributes);
 108                                                         if (previous != null) {
 109                                                                 log.warn("There was already an entry with DN "
 110                                                                                 + currentDn
 111                                                                                 + ", which has been discarded by a subsequent one.");
 112                                                         }
 113                                                 }
 114
 115                                                 if (attributeId.equals(dn.name()))
 116                                                         try {
 117                                                                 currentDn = new LdapName(
 118                                                                                 attributeValue.toString());
 119                                                                 currentAttributes = new BasicAttributes(true);
 120                                                         } catch (InvalidNameException e) {
 121                                                                 log.error(attributeValue
 122                                                                                 + " not a valid DN, skipping the entry.");
 123                                                                 currentDn = null;
 124                                                                 currentAttributes = null;
 125                                                         }
 126                                         }
 127
 128                                         // store attribute
 129                                         if (currentAttributes != null) {
 130                                                 Attribute attribute = currentAttributes
 131                                                                 .get(attributeId);
 132                                                 if (attribute == null) {
 133                                                         attribute = new BasicAttribute(attributeId);
 134                                                         currentAttributes.put(attribute);
 135                                                 }
 136                                                 attribute.add(attributeValue);
 137                                         }
 138                                         currentEntry = new StringBuilder();
 139                                 }
 140                                 currentEntry.append(line);
 141                         }
 142                 } finally {
 143                         IOUtils.closeQuietly(in);
 144                 }
 145                 return res;
 146         }
 147 }