Support for DartBlockBody, DartExpressionBody, DartOmit in java2dart.

editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/source/FileBasedSource.java

Index: editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/source/FileBasedSource.java
diff --git a/editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/source/FileBasedSource.java b/editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/source/FileBasedSource.java
index 8a6067f3f938147c84a016fd9bf8b5cafc7f74a8..e3913243faf6a68fbc2d36987e90a7d1853b4d33 100644
--- a/editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/source/FileBasedSource.java
+++ b/editor/tools/plugins/com.google.dart.engine/src/com/google/dart/engine/source/FileBasedSource.java
@@ -18,6 +18,8 @@ import com.google.dart.engine.internal.context.PerformanceStatistics;
 import com.google.dart.engine.internal.context.TimestampedData;
 import com.google.dart.engine.utilities.general.TimeCounter.TimeCounterHandle;
 import com.google.dart.engine.utilities.io.FileUtilities;
+import com.google.dart.engine.utilities.translation.DartBlockBody;
+import com.google.dart.engine.utilities.translation.DartOmit;
 
 import java.io.File;
 import java.io.FileInputStream;
@@ -54,6 +56,7 @@ public class FileBasedSource implements Source {
   /**
    * The character set used to decode bytes into characters.
    */
+  @DartOmit
   private static final Charset UTF_8_CHARSET = Charset.forName("UTF-8");
 
   /**
@@ -176,6 +179,7 @@ public class FileBasedSource implements Source {
    * @throws Exception if the contents of this source could not be accessed
    * @see #getContents()
    */
+  @DartBlockBody({"return new TimestampedData<String>(_file.lastModified(), _file.readAsStringSync());"})

[Brian Wilkerson, 2014/03/07 16:12:31]

This needs to be re-written to use asynchronous IO (which can't happen quite
yet), so I don't understand the value of this re-write.

[scheglov, 2014/03/07 22:47:44]

This just maintains the status quo, but using a different way to archive it -
annotation vs. Engine semantic processor.

[Brian Wilkerson, 2014/03/07 23:12:06]

Ok. That's reasonable.

   protected TimestampedData<CharSequence> getContentsFromFile() throws Exception {
     String contents;
     long modificationTime = file.lastModified();
@@ -234,6 +238,7 @@ public class FileBasedSource implements Source {
    * @throws Exception if the contents of this source could not be accessed
    * @see #getContentsToReceiver(ContentReceiver)
    */
+  @DartBlockBody({"throw new UnsupportedOperationException();"})

[Brian Wilkerson, 2014/03/07 16:12:31]

Shouldn't we just omit this method?

[scheglov, 2014/03/07 22:47:44]

Yes, we can.
Done.

   protected void getContentsFromFileToReceiver(ContentReceiver receiver) throws Exception {
     String contents;
     long modificationTime = file.lastModified();