new diff file format, fixing empty-microtile-bug

brouter-mapaccess/src/main/java/btools/mapaccess/Rd5DiffValidator.java

@@ -0,0 +1,70 @@
+/**
+ * Manage rd5 diff-file creation
+ *
+ * @author ab
+ */
+package btools.mapaccess;
+
+import java.io.File;
+
+final public class Rd5DiffValidator
+{
+  public static void main( String[] args ) throws Exception
+  {
+    validateDiffs( new File( args[0] ),new File( args[1] ) );
+  }
+
+  /**
+   * Validate diffs for all DF5 files
+   */
+  public static void validateDiffs( File oldDir, File newDir ) throws Exception
+  {
+    File oldDiffDir = new File( oldDir, "diff" );
+    File newDiffDir = new File( newDir, "diff" );
+
+    File[] filesNew = newDir.listFiles();
+    
+    for( File fn : filesNew )
+    {
+      String name = fn.getName();
+      if ( !name.endsWith( ".rd5" ) )
+      {
+        continue;
+      }
+      if ( fn.length() < 1024*1024 )
+      {
+        continue; // expecting no diff for small files
+      }
+      String basename = name.substring( 0, name.length() - 4 );
+      File fo = new File( oldDir, name );
+      if ( !fo.isFile() )
+      {
+        continue;
+      }
+
+      // calculate MD5 of old file
+      String md5 = Rd5DiffManager.getMD5( fo );
+
+      String md5New = Rd5DiffManager.getMD5( fn );
+
+      System.out.println( "name=" + name + " md5=" + md5 );
+
+      File specificNewDiffs = new File( newDiffDir, basename );
+
+      String diffFileName = md5 + ".df5";
+      File diffFile = new File( specificNewDiffs, diffFileName );
+
+      File fcmp = new File( oldDir, name + "_tmp" );
+
+      // merge old file and diff
+      Rd5DiffTool.recoverFromDelta( fo, diffFile, fcmp, new Rd5DiffTool() );
+      String md5Cmp = Rd5DiffManager.getMD5( fcmp );
+
+      if ( !md5Cmp.equals( md5New ) )
+      {
+        throw new RuntimeException( "**************** md5 mismatch!! *****************" );
+      }
+    }
+  }
+
+}