1 files changed, 146 insertions, 0 deletions
diff --git a/common/onap-common-configuration-management/onap-configuration-management-api/src/main/java/org/onap/config/api/DynamicConfiguration.java b/common/onap-common-configuration-management/onap-configuration-management-api/src/main/java/org/onap/config/api/DynamicConfiguration.java
new file mode 100644
index 0000000000..969749b260
--- /dev/null
+++ b/common/onap-common-configuration-management/onap-configuration-management-api/src/main/java/org/onap/config/api/DynamicConfiguration.java
@@ -0,0 +1,146 @@
+package org.onap.config.api;
+
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ * The type Dynamic configuration.
+ *
+ * @param <T> the type parameter
+ */
+public class DynamicConfiguration<T> {
+
+  /**
+   * The Tenant.
+   */
+  String tenant;
+  /**
+   * The Namespace.
+   */
+  String namespace;
+  /**
+   * The Key.
+   */
+  String key;
+  /**
+   * The Configuration.
+   */
+  Configuration configuration;
+  /**
+   * The Clazz.
+   */
+  Class clazz;
+  /**
+   * The Default value.
+   */
+  T defaultValue;
+
+  /**
+   * Gets dynamic configuration.
+   *
+   * @param <T>           the type parameter
+   * @param tenant        the tenant
+   * @param namespace     the namespace
+   * @param key           the key
+   * @param clazz         the clazz
+   * @param defaultValue  the default value
+   * @param configuration the configuration
+   * @return the dynamic configuration
+   */
+  public static <T> DynamicConfiguration<T> getDynamicConfiguration(String tenant, String namespace,
+                                                                    String key, Class<T> clazz,
+                                                                    T defaultValue,
+                                                                    Configuration configuration) {
+    DynamicConfiguration<T> dynamicConfiguration = new DynamicConfiguration<>();
+    dynamicConfiguration.tenant = tenant;
+    dynamicConfiguration.namespace = namespace;
+    dynamicConfiguration.key = key;
+    dynamicConfiguration.clazz = clazz;
+    dynamicConfiguration.defaultValue = defaultValue;
+    dynamicConfiguration.configuration = configuration;
+    return dynamicConfiguration;
+  }
+
+  /**
+   * Gets dyn configuration.
+   *
+   * @param <K>           the type parameter
+   * @param tenant        the tenant
+   * @param namespace     the namespace
+   * @param key           the key
+   * @param clazz         the clazz
+   * @param defaultValue  the default value
+   * @param configuration the configuration
+   * @return the dyn configuration
+   */
+  public static <K> DynamicConfiguration<List<K>> getDynConfiguration(String tenant,
+                                                                      String namespace, String key,
+                                                                      Class<K> clazz,
+                                                                      K defaultValue,
+                                                                      Configuration configuration) {
+    if (clazz.isPrimitive()) {
+      throw new RuntimeException(
+          "Only Wrapper classes like Integer, Long, Double, "
+              + "Boolean etc including String are supported.");
+    }
+    return getDynamicConfiguration(tenant, namespace, key, getArrayClass(clazz),
+        Arrays.asList(defaultValue), configuration);
+  }
+
+  /**
+   * Gets array class.
+   *
+   * @param clazz the clazz
+   * @return the array class
+   */
+  public static Class getArrayClass(Class clazz) {
+    Class arrayClass = null;
+    switch (clazz.getName()) {
+      case "java.lang.Byte":
+        arrayClass = Byte[].class;
+        break;
+      case "java.lang.Short":
+        arrayClass = Short[].class;
+        break;
+      case "java.lang.Integer":
+        arrayClass = Integer[].class;
+        break;
+      case "java.lang.Long":
+        arrayClass = Long[].class;
+        break;
+      case "java.lang.Float":
+        arrayClass = Float[].class;
+        break;
+      case "java.lang.Double":
+        arrayClass = Double[].class;
+        break;
+      case "java.lang.Boolean":
+        arrayClass = Boolean[].class;
+        break;
+      case "java.lang.Character":
+        arrayClass = Character[].class;
+        break;
+      case "java.lang.String":
+        arrayClass = String[].class;
+        break;
+      default:
+    }
+    return arrayClass;
+  }
+
+  /**
+   * Get t.
+   *
+   * @return the t
+   */
+  public T get() {
+    Object toReturn = configuration
+        .get(tenant, namespace, key, clazz, Hint.LATEST_LOOKUP, Hint.EXTERNAL_LOOKUP,
+            Hint.NODE_SPECIFIC);
+    if (toReturn != null && toReturn.getClass().isArray()) {
+      toReturn = Arrays.asList((Object[]) toReturn);
+    }
+    return toReturn == null ? defaultValue : (T) toReturn;
+  }
+
+}