add serialization fixes

src/main/java/com/conveyal/gtfs/loader/FeedLoadResult.java

@@ -1,13 +1,18 @@
 package com.conveyal.gtfs.loader;
 
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+
 import java.io.Serializable;
 
 /**
  * An instance of this class is returned by the GTFS feed loading method.
  * It provides a summary of what happened during the loading process.
  * It also provides the unique name that was assigned to this feed by the loader.
  * That unique name is the name of a database schema including all the tables loaded from this feed.
+ *
+ * Ignore unknown properties on deserialization to avoid conflicts with past versions. FIXME
  */
+@JsonIgnoreProperties(ignoreUnknown = true)
 public class FeedLoadResult implements Serializable {
 
     private static final long serialVersionUID = 1L;
@@ -31,4 +36,27 @@ public class FeedLoadResult implements Serializable {
 
     public long loadTimeMillis;
     public long completionTime;
+
+    public FeedLoadResult () {
+        this(false);
+    }
+
+    /**
+     * Optional constructor to generate blank table load results on instantiation.
+     */
+    public FeedLoadResult (boolean constructTableResults) {
+        agency = new TableLoadResult();
+        calendar = new TableLoadResult();
+        calendarDates = new TableLoadResult();
+        fareAttributes = new TableLoadResult();
+        fareRules = new TableLoadResult();
+        feedInfo = new TableLoadResult();
+        frequencies = new TableLoadResult();
+        routes = new TableLoadResult();
+        shapes = new TableLoadResult();
+        stops = new TableLoadResult();
+        stopTimes = new TableLoadResult();
+        transfers = new TableLoadResult();
+        trips = new TableLoadResult();
+    }
 }

src/main/java/com/conveyal/gtfs/validator/ValidationResult.java

@@ -3,6 +3,9 @@
 import java.awt.geom.Rectangle2D;
 import java.io.Serializable;
 import com.conveyal.gtfs.model.Pattern;
+import com.fasterxml.jackson.annotation.JsonIgnore;
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+
 import java.time.LocalDate;
 import java.util.List;
 
@@ -11,7 +14,10 @@
  * It groups together several kinds of information about what happened during the validation process.
  * Detailed lists of errors can be found in database tables created by the validator, but this class provides
  * immediate summary information.
+ *
+ * Ignore unknown properties on deserialization to avoid conflicts with past versions. FIXME
  */
+@JsonIgnoreProperties(ignoreUnknown = true)
 public class ValidationResult implements Serializable {
 
     private static final long serialVersionUID = 1L;