1 files changed, 85 insertions, 0 deletions
diff --git a/dictionaryvalidation/src/main/java/org/onap/validation/cli/core/Cli.java b/dictionaryvalidation/src/main/java/org/onap/validation/cli/core/Cli.java
new file mode 100644
index 0000000..bf2abad
--- /dev/null
+++ b/dictionaryvalidation/src/main/java/org/onap/validation/cli/core/Cli.java
@@ -0,0 +1,85 @@
+/*
+ *Copyright 2020 Nokia
+ *
+ * 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.
+ *
+ */
+package org.onap.validation.cli.core;
+
+import org.onap.validation.cli.command.validate.ResponseStorage;
+import org.onap.validation.cli.core.CommandResponse.CommandStatus;
+import org.onap.validation.yaml.util.Args;
+
+import java.nio.file.Path;
+
+public class Cli<T> {
+
+    public static final int INTERNAL_ERROR_STATUS_CODE = 2;
+    public static final int FAILED_STATUS_CODE = 1;
+    public static final int PASS_STATUS_CODE = 0;
+
+    public static final String APPLICATION_INTERNAL_ERROR_MSG = "\n# Application fails with internal error.";
+    public static final String APPLICATION_EXIT_SUCCESSFULLY_MSG = "\n# Application exits successfully.";
+
+    private final Console console;
+    private final ResponseStorage responseStorage;
+
+    public Cli(Console console, ResponseStorage responseStorage) {
+        this.console = console;
+        this.responseStorage = responseStorage;
+    }
+
+    public int run(Args args, Command<T> command) {
+        try {
+            final CommandResponse<T> commandResponse = processCommand(args, command);
+
+            logResultInfo(commandResponse.getResult());
+            storeResult(args, command, commandResponse.getResult());
+
+            this.console.info(APPLICATION_EXIT_SUCCESSFULLY_MSG);
+
+            return resolveCliStatusCodeFor(commandResponse);
+        } catch (Exception e) {
+            logException(e);
+            return INTERNAL_ERROR_STATUS_CODE;
+        }
+    }
+
+    private int resolveCliStatusCodeFor(CommandResponse<T> commandResponse) {
+        return commandResponse.getCommandStatus() == CommandStatus.PASS ? PASS_STATUS_CODE : FAILED_STATUS_CODE;
+    }
+
+    private void logException(Exception e) {
+        this.console.error("# Command error: ");
+        this.console.error(e);
+        this.console.error(APPLICATION_INTERNAL_ERROR_MSG);
+    }
+
+    private void storeResult(Args args, Command<T> command, T result) throws CommandException, java.io.IOException {
+        final Path pathToFileWithResponse = command.getOutputFilePath(args);
+        this.responseStorage.store(pathToFileWithResponse, result);
+        this.console.info(String.format("%n# Result was stored in a file: '%s'", pathToFileWithResponse));
+    }
+
+    private void logResultInfo(T result) {
+        this.console.info("\n# Operation result:\n");
+        this.console.info(result.toString());
+    }
+
+    private CommandResponse<T> processCommand(Args args, Command<T> command) throws CommandException {
+        this.console.info(String.format("# Executing a '%s' operation ...", command.getName()));
+        final CommandResponse<T> commandResponse = command.execute(args);
+        this.console.info("# ... Done.");
+        return commandResponse;
+    }
+}