1 files changed, 94 insertions, 0 deletions
diff --git a/site-manager/src/main/java/org/onap/policy/common/sitemanager/utils/PersistenceUnitPropertiesProvider.java b/site-manager/src/main/java/org/onap/policy/common/sitemanager/utils/PersistenceUnitPropertiesProvider.java
new file mode 100644
index 00000000..5d7abe7d
--- /dev/null
+++ b/site-manager/src/main/java/org/onap/policy/common/sitemanager/utils/PersistenceUnitPropertiesProvider.java
@@ -0,0 +1,94 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * site-manager
+ * ================================================================================
+ * Copyright (C) 2018 Ericsson. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.common.sitemanager.utils;
+
+import static org.onap.policy.common.sitemanager.utils.Constants.JDBC_DRIVER_PROPERTY_NAME;
+import static org.onap.policy.common.sitemanager.utils.Constants.JDBC_PASSWORD_PROPERTY_NAME;
+import static org.onap.policy.common.sitemanager.utils.Constants.JDBC_URL_PROPERTY_NAME;
+import static org.onap.policy.common.sitemanager.utils.Constants.JDBC_USER_PROPERTY_NAME;
+import static org.onap.policy.common.sitemanager.utils.ErrorMessages.SITE_MANAGER_PROPERY_FILE_MISSING_PROPERTY;
+import static org.onap.policy.common.sitemanager.utils.ErrorMessages.SITE_MANAGER_PROPERY_FILE_NOT_DEFINED_MESSAGE;
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.Properties;
+import org.onap.policy.common.sitemanager.exception.MissingPropertyException;
+import org.onap.policy.common.sitemanager.exception.PropertyFileProcessingException;
+
+public class PersistenceUnitPropertiesProvider {
+
+    private PersistenceUnitPropertiesProvider() {
+        super();
+    }
+
+    public static Properties getProperties(final String propertiesFileName, final Printable printable) {
+        if (propertiesFileName == null) {
+            printable.println(SITE_MANAGER_PROPERY_FILE_NOT_DEFINED_MESSAGE);
+            printable.println(SITE_MANAGER_PROPERY_FILE_MISSING_PROPERTY);
+            throw new PropertyFileProcessingException("Property file name is null :" + propertiesFileName);
+        }
+
+        final Path filePath = Paths.get(propertiesFileName);
+        final Properties properties = getProperties(filePath, printable);
+
+        // verify that we have all of the properties needed
+        if (isNotValid(properties, JDBC_DRIVER_PROPERTY_NAME, JDBC_URL_PROPERTY_NAME, JDBC_USER_PROPERTY_NAME,
+                JDBC_PASSWORD_PROPERTY_NAME)) {
+            // one or more missing properties
+            printable.println(SITE_MANAGER_PROPERY_FILE_MISSING_PROPERTY);
+            throw new MissingPropertyException("missing mandatory attributes");
+        }
+        return properties;
+    }
+
+    private static boolean isNotValid(final Properties properties, final String... values) {
+        if (values == null || values.length == 0) {
+            return true;
+        }
+        for (final String val : values) {
+            if (properties.get(val) == null) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    private static Properties getProperties(final Path filePath, final Printable printable) {
+        if (!filePath.toFile().exists()) {
+            printable.println(SITE_MANAGER_PROPERY_FILE_NOT_DEFINED_MESSAGE);
+            printable.println(SITE_MANAGER_PROPERY_FILE_MISSING_PROPERTY);
+            throw new PropertyFileProcessingException("Property file not found");
+        }
+
+        try (final BufferedReader bufferedReader = Files.newBufferedReader(filePath);) {
+            final Properties properties = new Properties();
+            properties.load(bufferedReader);
+            return properties;
+        } catch (final IOException exception) {
+            printable.println("Exception loading properties: " + exception);
+            printable.println(ErrorMessages.SITE_MANAGER_PROPERY_FILE_NOT_DEFINED_MESSAGE);
+            printable.println(ErrorMessages.SITE_MANAGER_PROPERY_FILE_MISSING_PROPERTY);
+            throw new PropertyFileProcessingException("Exception loading properties: ", exception);
+        }
+    }
+}