Initial checkin of assignment4-0.0

Extracted from assignment4-0.0.zip (without build/ dirs).
The CRLF in test-sentences.txt was replaced by LFs.
https://www.win.tue.nl/~wstahw/edu/2ID90/assignments/4/assignment4-0.0.zip
size 5189037
sha1 5e0a58acffbcac6e5f13837c98c2c0bb936304b5

1 files changed, 67 insertions, 0 deletions

diff --git a/spellchecker/src/ConfusionMatrixReader.java b/spellchecker/src/ConfusionMatrixReader.java
new file mode 100644
index 0000000..b75da47
--- /dev/null
+++ b/spellchecker/src/ConfusionMatrixReader.java
@@ -0,0 +1,67 @@
+
+
+import java.io.BufferedReader;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.util.HashMap;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+public class ConfusionMatrixReader {
+    
+    final static String DATAFILE_LOC = "confusion_matrix.txt";
+    final private HashMap<String,Integer> confusionMatrix = new HashMap<>();
+    final private HashMap<String,Integer> countMatrix = new HashMap<>();
+    public ConfusionMatrixReader() 
+    {
+        try {
+            readConfusionMatrix();
+        } catch (Exception ex) {
+            Logger.getLogger(ConfusionMatrixReader.class.getName()).log(Level.SEVERE, null, ex);
+        }
+    }
+    
+    private void readConfusionMatrix() 
+            throws FileNotFoundException, IOException
+    {
+        FileInputStream fis;
+        fis = new FileInputStream(DATAFILE_LOC);
+        BufferedReader in = new BufferedReader(new InputStreamReader(fis));
+        
+        while( in.ready() )
+        {
+            String line = in.readLine();
+            int space = line.lastIndexOf(' ');
+            String keys = line.substring(0,space);
+            try {
+                int count = Integer.parseInt(line.substring(space+1));
+                confusionMatrix.put(keys, count);
+
+                String key = keys.substring(0,keys.indexOf('|'));  
+                Integer value = countMatrix.get(key);
+                if (value==null) {
+                    value = 0;
+                }
+                countMatrix.put(key, value+count);
+            } catch(NumberFormatException e) {
+                System.err.println("problems with string <"+line+">");
+            }
+        }
+    }
+    
+    /**
+     * Returns the count for the pair <error>|<correct> in the confusion
+     * matrix, e.g. "c|ct" is 36
+     * 
+     * @param error
+     * @param correct
+     * @return
+     */
+    public int getConfusionCount(String error, String correct) 
+    {
+        Integer count = confusionMatrix.get(error+"|"+correct);
+        return count==null?0:count;
+    }
+}