LoeffelmanSeverson Final Project with documentation

deliverables/src/MV3500Cohort2018JulySeptember/FinalProjects/LoeffelmanSeverson/LoeffelmanSeversonDISImageReceiver.java

@@ -59,6 +59,7 @@ public class LoeffelmanSeversonDISImageReceiver {
             
             while (true) // Loop infinitely, receiving datagrams
             {
+                //buffer needs to be resized to be able to accept image sizes
                 byte buffer[] = new byte[100000]; // typical MTU size
                 
                 packet = new DatagramPacket(buffer, buffer.length); // reset
@@ -72,7 +73,11 @@ public class LoeffelmanSeversonDISImageReceiver {
                     String pduTypeName   = pdu.getClass().getName();
                     short protocolFamily = pdu.getProtocolFamily(); // TODO get string enumeration
                     
+                    //If we receive a comment PDU, we are going to look for a picture specifically
                     if(pdu.getPduTypeEnum() == PduType.COMMENT){
+                        //Set up data structures, get the list of variableDatums, and
+                        //get the first and only VariableDatum, and the arrayList
+                        //of OneByteChunks from the variableDatum
                         CommentPdu cPdu = (CommentPdu)pdu;
                         ArrayList<VariableDatum> payload = (ArrayList)cPdu.getVariableDatums();
                         VariableDatum payloadWrapper = payload.get(0);
@@ -80,13 +85,19 @@ public class LoeffelmanSeversonDISImageReceiver {
                         
                         byte[] imageByte = new byte[100000];
                         
+                        //Loop through the arrayList of OneByteChunks and
+                        //populate the byte array representation of the image
                         for(int i = 0; i < oBC.size(); i++){
                             imageByte[i] = oBC.get(i).getOtherParameters()[0];
                         }
                         
+                        //Convert that byte array into an input stream and into
+                        //an image using a buffered image reader.
                         ByteArrayInputStream bais = new ByteArrayInputStream(imageByte);
                         BufferedImage bimage = ImageIO.read(bais);
                         image = bimage;
+                        
+                        //Display the image using java swing utilities
                         JFrame frame = new JFrame();
                         frame.setSize(300, 300);
                         JLabel label = new JLabel(new ImageIcon(image));

deliverables/src/MV3500Cohort2018JulySeptember/FinalProjects/LoeffelmanSeverson/LoeffelmanSeversonDISImageSender.java

@@ -108,17 +108,24 @@ public class LoeffelmanSeversonDISImageSender {
                         break;
                         
                     case COMMENT:
+                        //Initialize PDU and image
                         aPdu = new CommentPdu();
                         CommentPdu cPdu = (CommentPdu)aPdu;
                         BufferedImage image = ImageIO.read(url1);
                         
+                        //Convert image to a byte array 
                         ByteArrayOutputStream baos = new ByteArrayOutputStream();
                         ImageIO.write(image, "png", baos);
                         byte[] buffer;
                         buffer = baos.toByteArray();
+                        
+                        //Instaniate data structures for holding bytes
                         ArrayList<VariableDatum> payload = new ArrayList<VariableDatum>();
                         ArrayList<OneByteChunk> payloadWrapper = new ArrayList<OneByteChunk>();
                         VariableDatum variableDatum = new VariableDatum();
+                        
+                        //Loop through, create OneByteChunk arrays of size 1
+                        //and place them in ArrayList of OneByteChunks
                         for(int i = 0; i < buffer.length; i++){
                             OneByteChunk oBC = new OneByteChunk();
                             byte[] oneBite = new byte[1];
@@ -127,10 +134,13 @@ public class LoeffelmanSeversonDISImageSender {
                             payloadWrapper.add(oBC);
                         }
                         System.out.println("Sending Picture");
-
+                        
+                        //Add the arrayList of OneByteChunks to the variable datum
                         variableDatum.setVariableData(payloadWrapper);
                         
+                        //Add the variableDatum to the arraylist
                         payload.add(variableDatum);
+                        //Set the variableDatum for the PDU to be sent
                         cPdu.setVariableDatums(payload);
                         break;