diff -r 939fa8d8663e -r b188eae2c092 java/dictionary-generator/src/cz/frantovo/telco/dictionary/IndexEntry.java
--- a/java/dictionary-generator/src/cz/frantovo/telco/dictionary/IndexEntry.java	Tue Jul 09 22:41:49 2013 +0200
+++ b/java/dictionary-generator/src/cz/frantovo/telco/dictionary/IndexEntry.java	Tue Jul 09 22:42:32 2013 +0200
@@ -17,14 +17,69 @@
  */
 package cz.frantovo.telco.dictionary;
 
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.util.Objects;
+
 /**
  *
  * @author Ing. František Kučera (frantovo.cz)
  */
 public class IndexEntry implements Comparable<IndexEntry> {
 
+	private String name;
+	private long offset;
+	private long length;
+	private long ordinal;
+
+	public IndexEntry(String name, long offset, long length) {
+		this.name = name;
+		this.offset = offset;
+		this.length = length;
+	}
+
+	public void serialize(DataOutputStream indexOutputStream) throws IOException {
+		indexOutputStream.write(name.getBytes(StandardCharsets.UTF_8));
+		indexOutputStream.write(0);
+		indexOutputStream.writeInt((int) offset); // unsigned int 32
+		indexOutputStream.writeInt((int) length); // unsigned int 32
+	}
+
+	public void setOrdinal(long ordinal) {
+		this.ordinal = ordinal;
+	}
+
+	public long getOrdinal() {
+		return ordinal;
+	}
+
 	@Override
 	public int compareTo(IndexEntry o) {
-		throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
+		int nameDiff = name.compareTo(o.name);
+		if (nameDiff == 0) {
+			int offsetDiff = ((Long) offset).compareTo(o.offset);
+			if (offsetDiff == 0) {
+				return ((Long) length).compareTo(o.length);
+			} else {
+				return offsetDiff;
+			}
+		} else {
+			return nameDiff;
+		}
+	}
+
+	@Override
+	public boolean equals(Object o) {
+		return o instanceof IndexEntry && compareTo((IndexEntry) o) == 0;
+	}
+
+	@Override
+	public int hashCode() {
+		int hash = 5;
+		hash = 53 * hash + Objects.hashCode(this.name);
+		hash = 53 * hash + (int) (this.offset ^ (this.offset >>> 32));
+		hash = 53 * hash + (int) (this.length ^ (this.length >>> 32));
+		return hash;
 	}
 }