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Semester 1/Programming 1/Java/examples/projects/chapter07/weblog-analyzer/LogAnalyzer.java

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+/**
+ * Read web server data and analyse hourly access patterns.
+ * 
+ * @author David J. Barnes and Michael Kölling.
+ * @version    2016.02.29
+ */
+public class LogAnalyzer
+{
+    // Where to calculate the hourly access counts.
+    private int[] hourCounts;
+    // Use a LogfileReader to access the data.
+    private LogfileReader reader;
+
+    /**
+     * Create an object to analyze hourly web accesses.
+     */
+    public LogAnalyzer()
+    { 
+        // Create the array object to hold the hourly
+        // access counts.
+        hourCounts = new int[24];
+        // Create the reader to obtain the data.
+        reader = new LogfileReader();
+    }
+
+    /**
+     * Analyze the hourly access data from the log file.
+     */
+    public void analyzeHourlyData()
+    {
+        while(reader.hasNext()) {
+            LogEntry entry = reader.next();
+            int hour = entry.getHour();
+            hourCounts[hour]++;
+        }
+    }
+
+    /**
+     * Print the hourly counts.
+     * These should have been set with a prior
+     * call to analyzeHourlyData.
+     */
+    public void printHourlyCounts()
+    {
+        System.out.println("Hr: Count");
+        for(int hour = 0; hour < hourCounts.length; hour++) {
+            System.out.println(hour + ": " + hourCounts[hour]);
+        }
+    }
+    
+    /**
+     * Print the lines of data read by the LogfileReader
+     */
+    public void printData()
+    {
+        reader.printData();
+    }
+}