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diff --git a/org/apache/commons/net/pop3/POP3MessageInfo.java b/org/apache/commons/net/pop3/POP3MessageInfo.java
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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.commons.net.pop3;
+
+/***
+ * POP3MessageInfo is used to return information about messages stored on
+ * a POP3 server.  Its fields are used to mean slightly different things
+ * depending on the information being returned.
+ * <p>
+ * In response to a status command, <code> number </code>
+ * contains the number of messages in the mailbox, <code> size </code>
+ * contains the size of the mailbox in bytes, and <code> identifier </code>
+ * is null.
+ * <p>
+ * In response to a message listings, <code> number </code>
+ * contains the message number, <code> size </code> contains the
+ * size of the message in bytes, and <code> identifier </code> is null.
+ * <p>
+ * In response to unique identifier listings, <code> number </code> contains
+ * the message number, <code> size </code> is undefined, and
+ * <code> identifier </code> contains the message's unique identifier.
+ * <p>
+ * <p>
+ * @author Daniel F. Savarese
+ ***/
+
+public final class POP3MessageInfo
+{
+    public int number;
+    public int size;
+    public String identifier;
+
+    /***
+     * Creates a POP3MessageInfo instance with <code>number</code> and
+     * <code> size </code> set to 0, and <code>identifier</code> set to
+     * null.
+     ***/
+    public POP3MessageInfo()
+    {
+        number = size = 0;
+        identifier = null;
+    }
+
+    /***
+     * Creates a POP3MessageInfo instance with <code>number</code> set
+     * to <code> num </code>, <code> size </code> set to <code> octets </code>,
+     * and <code>identifier</code> set to null.
+     ***/
+    public POP3MessageInfo(int num, int octets)
+    {
+        number = num;
+        size = octets;
+        identifier = null;
+    }
+
+    /***
+     * Creates a POP3MessageInfo instance with <code>number</code> set
+     * to <code> num </code>, <code> size </code> undefined,
+     * and <code>identifier</code> set to <code>uid</code>.
+     ***/
+    public POP3MessageInfo(int num, String uid)
+    {
+        number = num;
+        size = -1;
+        identifier = uid;
+    }
+}