Merge pull request #21 from codice/npe

Added null safety to CCs that do not have numeric mapping

Author: bdeining

converter/src/test/java/org/codice/countrycode/CountryCodeSimpleTest.java

@@ -24,6 +24,7 @@
 import static org.junit.Assert.assertThat;
 
 import java.util.Set;
+import org.codice.countrycode.CountryCodeSimple.StandardFormat;
 import org.junit.Ignore;
 import org.junit.Test;
 
@@ -101,6 +102,14 @@ public void testConversionNoNumericCode() {
     assertThat("IP", equalTo(result.iterator().next()));
   }
 
+  @Test
+  public void testConversionNonExistentCode() {
+    Set<String> result =
+        CountryCodeSimple.convert(
+            "ZZ", StandardFormat.ISO_3166_1_ALPHA2, StandardFormat.GENC_3_0_0_ALPHA3);
+    assertThat(0, equalTo(result.size()));
+  }
+
   // todo this demonstrates a bug where the input format is ignored by the converter impl
   // we should fix this bug
   @Test

standards/common/src/main/java/org/codice/countrycode/standards/common/StandardUtils.java

@@ -13,6 +13,7 @@
  */
 package org.codice.countrycode.standards.common;
 
+import java.util.Objects;
 import org.codice.countrycode.standard.CountryCode;
 
 public class StandardUtils {
@@ -24,6 +25,8 @@ public static boolean containsFormatValue(CountryCode countryCode, String value)
         .getStandard()
         .getFormatNames()
         .stream()
-        .anyMatch(formatName -> countryCode.getAsFormat(formatName).equalsIgnoreCase(value));
+        .map(formatName -> countryCode.getAsFormat(formatName))
+        .filter(Objects::nonNull)
+        .anyMatch(formatName -> formatName.equalsIgnoreCase(value));
   }
 }