SONAR-4515 Display all allowed values for sonar.languages when an invalid one is specified

1 files changed, 10 insertions, 1 deletions

diff --git a/sonar-plugin-api/src/main/java/org/sonar/api/resources/Languages.java b/sonar-plugin-api/src/main/java/org/sonar/api/resources/Languages.java
index ee474041bc4..96dd3701751 100644
--- a/sonar-plugin-api/src/main/java/org/sonar/api/resources/Languages.java
+++ b/sonar-plugin-api/src/main/java/org/sonar/api/resources/Languages.java
@@ -28,6 +28,7 @@ import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
 
 /**
  * A class to store the list of languages
@@ -36,7 +37,7 @@ import java.util.Map;
  */
 public class Languages implements BatchComponent, ServerComponent {
 
-  private final Map<String, Language> map = Maps.newHashMap();
+  private final Map<String, Language> map = Maps.newLinkedHashMap();
 
   /**
    * Creates a list of languages
@@ -81,4 +82,12 @@ public class Languages implements BatchComponent, ServerComponent {
   public void add(Language language) {
     map.put(language.getKey(), language);
   }
+
+  /**
+   * @return list of all available language keys
+   * @since 4.0
+   */
+  public Set<String> allKey() {
+    return map.keySet();
+  }
 }