diff --git a/.gitignore b/.gitignore
index 6eca1307e..1c54f8f31 100644
--- a/.gitignore
+++ b/.gitignore
@@ -51,6 +51,7 @@ duplicates.txt
 /infer/tests/build_systems/incremental_analysis_cost_change/src
 /infer/tests/build_systems/incremental_analysis_add_procedure/src
 /infer/tests/build_systems/java_test_determinator/*.test
+/infer/tests/build_systems/java_source_parser/*.test
 /_release
 /infer-source
 
diff --git a/Makefile b/Makefile
index 874825267..fec5c6b63 100644
--- a/Makefile
+++ b/Makefile
@@ -137,6 +137,7 @@ BUILD_SYSTEMS_TESTS += \
   differential_skip_duplicated_types_on_filenames \
   differential_skip_duplicated_types_on_filenames_with_renamings \
   gradle \
+  java_source_parser \
   java_test_determinator \
   javac \
   resource_leak_exception_lines \
diff --git a/infer/src/java/jSourceFileInfo.mll b/infer/src/java/jSourceFileInfo.mll
index 89fbf4ab2..4bbc6b708 100644
--- a/infer/src/java/jSourceFileInfo.mll
+++ b/infer/src/java/jSourceFileInfo.mll
@@ -402,7 +402,31 @@ and skip_comments action = parse
           In_channel.close cin
     )
 
-  let debug_on_file _path =
-    (* TODO: do something here *)
-    ()
+  let debug_on_file path =
+    if String.is_suffix path ~suffix:".java" then (
+      let cin = In_channel.create path in
+      let stack = [] in
+      let record_location ~classname ~col ~line =
+        let cn : JBasics.class_name = JBasics.make_cn classname in
+        Printf.printf "class %s at line %d, column %d\n"
+          (JBasics.cn_name cn) line col in
+      try (
+        let state = { record_location; stack; } in
+        class_scan state (from_channel cin) ;
+        In_channel.close cin )
+      with
+        | Failure s ->
+          Printf.printf "Error parsing source file: %s" s;
+          In_channel.close cin
+        | Missing_opening_bracket ->
+          Printf.printf
+            "Missing opening bracket error while parsing source file\n";
+          In_channel.close cin
+        | Missing_opening_parenthesis ->
+          Printf.printf
+            "Missing opening parenthesis error while parsing source file\n";
+          In_channel.close cin
+    )
+
+
 }
diff --git a/infer/tests/build_systems/java_source_parser/ExampleCustomAnnotation.java b/infer/tests/build_systems/java_source_parser/ExampleCustomAnnotation.java
new file mode 100644
index 000000000..e8378e79e
--- /dev/null
+++ b/infer/tests/build_systems/java_source_parser/ExampleCustomAnnotation.java
@@ -0,0 +1,13 @@
+/*
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+package java.source.parser;
+
+@interface ExampleCustomAnnotation {
+  String name();
+
+  String address();
+}
diff --git a/infer/tests/build_systems/java_source_parser/Main.java b/infer/tests/build_systems/java_source_parser/Main.java
new file mode 100644
index 000000000..7c1196ad6
--- /dev/null
+++ b/infer/tests/build_systems/java_source_parser/Main.java
@@ -0,0 +1,120 @@
+/*
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+package java.source.parser;
+
+public class Main {
+
+  // Tests for annotations
+  static interface Interface {
+    public Object foo();
+  }
+
+  @ExampleCustomAnnotation(name = "Chaitanya", address = "Agra, India")
+  class AnnotatedClass {
+    @Deprecated
+    void method1() {
+      return;
+    }
+
+    @SuppressWarnings("deprecation")
+    void method2() {
+      return;
+    }
+  }
+
+  static class Impl implements Interface {
+    @Override
+    public Object foo() {
+      return null;
+    }
+  }
+
+  // tests for anonymous inner classes
+  static class MyThread {
+    MyThread(Object o) {}
+
+    public static void main(String[] args) {
+
+      Thread t1 =
+          new Thread() {
+            public void run() {
+              System.out.println("Child Thread");
+            }
+          };
+      t1.start();
+
+      Thread t2 =
+          new Thread(
+              new Runnable() {
+                public void run() {
+                  System.out.println("Child Thread");
+                }
+              });
+      t2.start();
+
+      // nested anonymous classes
+      MyThread mt =
+          new MyThread(
+              new Object() {
+                private int counter;
+
+                int get_counter() {
+                  return this.counter;
+                }
+              }) {
+            private String label;
+
+            String get_label() {
+              return this.label;
+            }
+          };
+    }
+  }
+
+  // tests for enum
+
+  public enum Block {
+    NONE(""),
+
+    WALL("Wall") {
+      @Override
+      public boolean good() {
+        return true;
+      }
+    },
+
+    PIT("Pit") {
+      @Override
+      public boolean good() {
+        return true;
+      }
+    },
+
+    FOG("Fog") {
+      @Override
+      public boolean good() {
+        return true;
+      }
+    };
+
+    private class C {};
+
+    private String name;
+
+    private Block(String name) {
+      this.name = name;
+    }
+
+    public String getName() {
+      return this.name;
+    }
+
+    public boolean good() {
+      return false;
+    }
+  }
+}
diff --git a/infer/tests/build_systems/java_source_parser/Makefile b/infer/tests/build_systems/java_source_parser/Makefile
new file mode 100644
index 000000000..c49f1d7de
--- /dev/null
+++ b/infer/tests/build_systems/java_source_parser/Makefile
@@ -0,0 +1,28 @@
+# Copyright (c) Facebook, Inc. and its affiliates.
+#
+# This source code is licensed under the MIT license found in the
+# LICENSE file in the root directory of this source tree.
+
+TESTS_DIR = ../..
+
+INFER_OPTIONS = --java-debug-source-file-info
+SOURCES = Main.java
+
+test: parser.output.test
+	$(call check_no_diff,parser.output,parser.output.test)
+
+replace: parser.output.test
+	cp $< parser.output
+
+clean:
+	rm -fr infer-out parser.output.test *.class
+
+# we check if the java source file is valid for javac
+compile:
+	javac *.java
+
+.PHONY: parser.output.test
+parser.output.test: $(SOURCES) $(INFER_BIN)
+	$(INFER_BIN) $(INFER_OPTIONS) $(SOURCES) > parser.output.test
+
+include $(TESTS_DIR)/base.make
diff --git a/infer/tests/build_systems/java_source_parser/parser.output b/infer/tests/build_systems/java_source_parser/parser.output
new file mode 100644
index 000000000..6f688da9f
--- /dev/null
+++ b/infer/tests/build_systems/java_source_parser/parser.output
@@ -0,0 +1,11 @@
+class java.source.parser.Main at line 9, column 13
+class java.source.parser.Main$Interface at line 12, column 19
+class java.source.parser.Main$AnnotatedClass at line 17, column 8
+class java.source.parser.Main$Impl at line 29, column 15
+class java.source.parser.Main$MyThread at line 37, column 15
+class java.source.parser.Main$MyThread$1 at line 43, column 23
+class java.source.parser.Main$MyThread$2 at line 52, column 29
+class java.source.parser.Main$MyThread$3 at line 62, column 27
+class java.source.parser.Main$MyThread$4 at line 68, column 17
+class java.source.parser.Main$Block at line 80, column 14
+class java.source.parser.Main$Block$C at line 104, column 18