PLUGINAPI-20 Sensors can mark a file as unchanged

Author: dbmeneses

sonar-plugin-api/src/main/java/org/sonar/api/batch/sensor/SensorContext.java

@@ -221,6 +221,15 @@ public interface SensorContext {
    */
   void markForPublishing(InputFile inputFile);
 
+  /**
+   * Marks a file as not having any data changed since the last analysis, including issues.
+   * The platform might perform optimizations based on this flag.
+   * The sensor is still expected to report all data for the file.
+   * @since 9.9
+   */
+  @Beta
+  void markAsUnchanged(InputFile inputFile);
+
   /**
    * Access object to write cache that will be stored and made available in a future analysis.
    * If cache is disabled, the methods in the returned object will have no effect.