read .gz files

tools/cooja/java/se/sics/cooja/util/StringUtils.java

@@ -30,12 +30,13 @@
 package se.sics.cooja.util;
 
 import java.io.File;
-import java.io.FileReader;
+import java.io.FileInputStream;
 import java.io.FileWriter;
 import java.io.IOException;
 import java.io.InputStreamReader;
 import java.io.PrintWriter;
 import java.net.URL;
+import java.util.zip.GZIPInputStream;
 
 /**
  * Some utility methods for generating hex dumps.
@@ -139,13 +140,20 @@ public class StringUtils {
     }
   }
 
-  public static String loadFromFile(File scriptFile) {
-    if (scriptFile == null) {
+  public static String loadFromFile(File file) {
+    if (file == null) {
       return null;
     }
-    try {
-      FileReader reader = new FileReader(scriptFile);
     StringBuilder sb = new StringBuilder();
+    InputStreamReader reader = null;
+    
+    try {
+      if (file.getName().endsWith(".gz")) {
+        reader = new InputStreamReader(new GZIPInputStream(new FileInputStream(file)));
+      } else {
+        reader = new InputStreamReader(new FileInputStream(file));
+      }
+
       char[] buf = new char[4096];
       int read;
       while ((read = reader.read(buf)) > 0) {
@@ -155,6 +163,18 @@ public class StringUtils {
       reader.close();
       return sb.toString();
     } catch (IOException e) {
+      e.printStackTrace();
+      
+      if (reader != null) {
+        try {
+          reader.close();
+        } catch (IOException e1) {
+        }
+      }
+      
+      if (sb != null && sb.length() > 0) {
+        return sb.toString();
+      }
       return null;
     }
   }