Fix generics issue.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/csv/trunk@1560399 13f79535-47bb-0310-9956-ffa450edef68

Author: garydgregory

src/main/java/org/apache/commons/csv/CSVRecord.java

@@ -176,7 +176,7 @@ public Iterator<String> iterator() {
      * @param map The Map to populate.
      * @return the given map.
      */
-    Map<String, String> putIn(final Map<String, String> map) {
+    <M extends Map<String, String>> M putIn(final M map) {
         for (final Entry<String, Integer> entry : mapping.entrySet()) {
             map.put(entry.getKey(), values[entry.getValue().intValue()]);
         }

src/test/java/org/apache/commons/csv/CSVRecordTest.java

@@ -26,6 +26,7 @@
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
+import java.util.TreeMap;
 import java.util.concurrent.ConcurrentHashMap;
 
 import org.junit.Assert;
@@ -133,6 +134,9 @@ public void testPutInMap() {
         final Map<String, String> map = new ConcurrentHashMap<String, String>();
         this.recordWithHeader.putIn(map);
         this.validateMap(map, false);
+        // Test that we can compile with assigment to the same map as the param.
+        final TreeMap<String, String> map2 = recordWithHeader.putIn(new TreeMap<String, String>());
+        this.validateMap(map2, false);
     }
 
     @Test
@@ -141,7 +145,7 @@ public void testRemoveAndAddColumns() throws IOException {
         final CSVPrinter printer = new CSVPrinter(new StringBuilder(), CSVFormat.DEFAULT);
         final Map<String, String> map = recordWithHeader.toMap();
         map.remove("OldColumn");
-        map.put("NewColumn", "NewValue");
+        map.put("ZColumn", "NewValue");
         // check:
         final ArrayList<String> list = new ArrayList<String>(map.values());
         Collections.sort(list);