Implement #11: default to alphabetic sorting of properties

Author: cowtowncoder

release-notes/VERSION

@@ -1,6 +1,8 @@
 Project: jackson-dataformat-csv
 Version: 2.3.0 (xx-xxx-2013)
 
+#11: Default `CsvMapper` to use alphabetic sorting of properties (since
+ alternative is basically undefined; and with JDK 1.7+, unstable too)
 - Add support for `JsonGenerator.Feature.WRITE_BIGDECIMAL_AS_PLAIN`
 
 ------------------------------------------------------------------------

src/main/java/com/fasterxml/jackson/dataformat/csv/CsvMapper.java

@@ -5,7 +5,6 @@
 import com.fasterxml.jackson.databind.introspect.BeanPropertyDefinition;
 import com.fasterxml.jackson.databind.util.NameTransformer;
 import com.fasterxml.jackson.core.type.TypeReference;
-
 import com.fasterxml.jackson.dataformat.csv.impl.LRUMap;
 
 /**
@@ -42,6 +41,8 @@ public CsvMapper()
     public CsvMapper(CsvFactory f)
     {
         super(f);
+        // As per #11: default to alphabetic ordering
+        enable(MapperFeature.SORT_PROPERTIES_ALPHABETICALLY);
     }
 
     /*

src/test/java/com/fasterxml/jackson/dataformat/csv/TestUnwrappingWithCSV.java

@@ -20,6 +20,8 @@ public Location(int x, int y) {
         }
     }
 
+    // IMPORTANT: ordering DOES matter here
+    @JsonPropertyOrder({ "name", "location" })
     static class Unwrapping {
         public String name;
         @JsonUnwrapped(prefix="loc.")

src/test/java/com/fasterxml/jackson/dataformat/csv/TestVersions.java

@@ -3,6 +3,7 @@
 import java.io.*;
 
 import com.fasterxml.jackson.core.*;
+import com.fasterxml.jackson.databind.MapperFeature;
 
 public class TestVersions extends ModuleTestBase
 {
@@ -18,6 +19,13 @@ public void testMapperVersions() throws IOException
         jgen.close();
     }
 
+    // Mostly to verify #11
+    public void testMapperDefaults()
+    {
+        CsvMapper mapper = new CsvMapper();
+        assertTrue(mapper.isEnabled(MapperFeature.SORT_PROPERTIES_ALPHABETICALLY));
+    }
+    
     /*
     /**********************************************************
     /* Helper methods