Refactor CommandLineArguments classes

All CMD Args simulator classes to extend from CMD class on Common.
Fix all unit tests accordingly.

Issue-ID: POLICY-3129
Change-Id: If69e432679772df15b06ce7e316c7c876b69773d
Signed-off-by: adheli.tavares <adheli.tavares@est.tech>

2 files changed, 11 insertions, 177 deletions

diff --git a/models-sim/models-sim-dmaap/src/main/java/org/onap/policy/models/sim/dmaap/startstop/DmaapSimCommandLineArguments.java b/models-sim/models-sim-dmaap/src/main/java/org/onap/policy/models/sim/dmaap/startstop/DmaapSimCommandLineArguments.java
index 724c3dc35..8968a2a8e 100644
--- a/models-sim/models-sim-dmaap/src/main/java/org/onap/policy/models/sim/dmaap/startstop/DmaapSimCommandLineArguments.java
+++ b/models-sim/models-sim-dmaap/src/main/java/org/onap/policy/models/sim/dmaap/startstop/DmaapSimCommandLineArguments.java
@@ -1,6 +1,6 @@
 /*-
  * ============LICENSE_START=======================================================
- *  Copyright (C) 2019 Nordix Foundation.
+ *  Copyright (C) 2019-2021 Nordix Foundation.
  *  Modifications Copyright (C) 2019 AT&T Intellectual Property. All rights reserved.
  * ================================================================================
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -21,66 +21,21 @@
 
 package org.onap.policy.models.sim.dmaap.startstop;
 
-import java.io.File;
-import java.io.PrintWriter;
-import java.io.StringWriter;
-import java.net.URL;
-import java.util.Arrays;
-import lombok.Getter;
-import lombok.Setter;
-import org.apache.commons.cli.CommandLine;
-import org.apache.commons.cli.DefaultParser;
-import org.apache.commons.cli.HelpFormatter;
-import org.apache.commons.cli.Option;
-import org.apache.commons.cli.Options;
-import org.apache.commons.cli.ParseException;
-import org.apache.commons.lang3.StringUtils;
-import org.onap.policy.common.utils.resources.ResourceUtils;
-import org.onap.policy.models.sim.dmaap.DmaapSimException;
+import org.onap.policy.common.utils.cmd.CommandLineArgumentsHandler;
+import org.onap.policy.common.utils.cmd.CommandLineException;
 import org.onap.policy.models.sim.dmaap.DmaapSimRuntimeException;
 
-
 /**
  * This class reads and handles command line parameters for the DMaaP simulator service.
  */
-public class DmaapSimCommandLineArguments {
-    private static final String FILE_MESSAGE_PREAMBLE = " file \"";
-    private static final int HELP_LINE_LENGTH = 120;
-
-    private final Options options;
-
-    @Getter
-    @Setter
-    private String configurationFilePath = null;
+public class DmaapSimCommandLineArguments extends CommandLineArgumentsHandler {
+    private static final String DMAAP_SIM = "DMaaP simulator";
 
     /**
      * Construct the options for the CLI editor.
      */
     public DmaapSimCommandLineArguments() {
-        //@formatter:off
-        options = new Options();
-        options.addOption(Option.builder("h")
-                .longOpt("help")
-                .desc("outputs the usage of this command")
-                .required(false)
-                .type(Boolean.class)
-                .build());
-        options.addOption(Option.builder("v")
-                .longOpt("version")
-                .desc("outputs the version of DMaaP simulator")
-                .required(false)
-                .type(Boolean.class)
-                .build());
-        options.addOption(Option.builder("c")
-                .longOpt("config-file")
-                .desc("the full path to the configuration file to use, "
-                        + "the configuration file must be a Json file containing the DMaaP simulator parameters")
-                .hasArg()
-                .argName("CONFIG_FILE")
-                .required(false)
-                .type(String.class)
-                .build());
-        //@formatter:on
+        super(Main.class.getName(), DMAAP_SIM);
     }
 
     /**
@@ -89,135 +44,12 @@ public class DmaapSimCommandLineArguments {
      * @param args The command line arguments
      */
     public DmaapSimCommandLineArguments(final String[] args) {
-        // Set up the options with the default constructor
         this();
 
-        // Parse the arguments
         try {
             parse(args);
-        } catch (final DmaapSimException e) {
+        } catch (final CommandLineException e) {
             throw new DmaapSimRuntimeException("parse error on DMaaP simulator parameters", e);
         }
     }
-
-    /**
-     * Parse the command line options.
-     *
-     * @param args The command line arguments
-     * @return a string with a message for help and version, or null if there is no message
-     * @throws DmaapSimException on command argument errors
-     */
-    public String parse(final String[] args) throws DmaapSimException {
-        // Clear all our arguments
-        setConfigurationFilePath(null);
-
-        CommandLine commandLine = null;
-        try {
-            commandLine = new DefaultParser().parse(options, args);
-        } catch (final ParseException e) {
-            throw new DmaapSimException("invalid command line arguments specified : " + e.getMessage());
-        }
-
-        // Arguments left over after Commons CLI does its stuff
-        final String[] remainingArgs = commandLine.getArgs();
-
-        if (remainingArgs.length > 0 && commandLine.hasOption('c') || remainingArgs.length > 0) {
-            throw new DmaapSimException("too many command line arguments specified : " + Arrays.toString(args));
-        }
-
-        if (remainingArgs.length == 1) {
-            configurationFilePath = remainingArgs[0];
-        }
-
-        if (commandLine.hasOption('h')) {
-            return help(Main.class.getName());
-        }
-
-        if (commandLine.hasOption('v')) {
-            return version();
-        }
-
-        if (commandLine.hasOption('c')) {
-            setConfigurationFilePath(commandLine.getOptionValue('c'));
-        }
-
-        return null;
-    }
-
-    /**
-     * Validate the command line options.
-     *
-     * @throws DmaapSimException on command argument validation errors
-     */
-    public void validate() throws DmaapSimException {
-        validateFileExists("DMaaP simulator configuration", configurationFilePath);
-    }
-
-    /**
-     * Print version information for DMaaP simulator.
-     *
-     * @return the version string
-     */
-    public String version() {
-        return ResourceUtils.getResourceAsString("version.txt");
-    }
-
-    /**
-     * Print help information for DMaaP simulator.
-     *
-     * @param mainClassName the main class name
-     * @return the help string
-     */
-    public String help(final String mainClassName) {
-        final HelpFormatter helpFormatter = new HelpFormatter();
-        final StringWriter stringWriter = new StringWriter();
-        final PrintWriter printWriter = new PrintWriter(stringWriter);
-
-        helpFormatter.printHelp(printWriter, HELP_LINE_LENGTH, mainClassName + " [options...]", "options", options, 0,
-                0, "");
-
-        return stringWriter.toString();
-    }
-
-    /**
-     * Gets the full expanded configuration file path.
-     *
-     * @return the configuration file path
-     */
-    public String getFullConfigurationFilePath() {
-        return ResourceUtils.getFilePath4Resource(getConfigurationFilePath());
-    }
-
-    /**
-     * Check set configuration file path.
-     *
-     * @return true, if check set configuration file path
-     */
-    public boolean checkSetConfigurationFilePath() {
-        return configurationFilePath != null && configurationFilePath.length() > 0;
-    }
-
-    /**
-     * Validate file exists.
-     *
-     * @param fileTag the file tag
-     * @param fileName the file name
-     * @throws DmaapSimException on the file name passed as a parameter
-     */
-    private void validateFileExists(final String fileTag, final String fileName) throws DmaapSimException {
-        if (StringUtils.isBlank(fileName)) {
-            throw new DmaapSimException(fileTag + " file was not specified as an argument");
-        }
-
-        // The file name refers to a resource on the local file system
-        final URL fileUrl = ResourceUtils.getUrl4Resource(fileName);
-        if (fileUrl == null) {
-            throw new DmaapSimException(fileTag + FILE_MESSAGE_PREAMBLE + fileName + "\" does not exist");
-        }
-
-        final File theFile = new File(fileUrl.getPath());
-        if (!theFile.exists()) {
-            throw new DmaapSimException(fileTag + FILE_MESSAGE_PREAMBLE + fileName + "\" does not exist");
-        }
-    }
 }
diff --git a/models-sim/models-sim-dmaap/src/main/java/org/onap/policy/models/sim/dmaap/startstop/Main.java b/models-sim/models-sim-dmaap/src/main/java/org/onap/policy/models/sim/dmaap/startstop/Main.java
index a7214a073..2c6c54063 100644
--- a/models-sim/models-sim-dmaap/src/main/java/org/onap/policy/models/sim/dmaap/startstop/Main.java
+++ b/models-sim/models-sim-dmaap/src/main/java/org/onap/policy/models/sim/dmaap/startstop/Main.java
@@ -1,6 +1,6 @@
 /*-
  * ============LICENSE_START=======================================================
- *  Copyright (C) 2019 Nordix Foundation.
+ *  Copyright (C) 2019-2021 Nordix Foundation.
  *  Modifications Copyright (C) 2019 AT&T Intellectual Property. All rights reserved.
  * ================================================================================
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -22,7 +22,9 @@
 package org.onap.policy.models.sim.dmaap.startstop;
 
 import java.util.Arrays;
+import org.onap.policy.common.utils.cmd.CommandLineException;
 import org.onap.policy.models.sim.dmaap.DmaapSimException;
+import org.onap.policy.models.sim.dmaap.DmaapSimRuntimeException;
 import org.onap.policy.models.sim.dmaap.parameters.DmaapSimParameterGroup;
 import org.onap.policy.models.sim.dmaap.parameters.DmaapSimParameterHandler;
 import org.slf4j.Logger;
@@ -58,7 +60,7 @@ public class Main {
             }
             // Validate that the arguments are sane
             arguments.validate();
-        } catch (final DmaapSimException e) {
+        } catch (final DmaapSimRuntimeException | CommandLineException e) {
             LOGGER.error("start of DMaaP simulator service failed", e);
             return;
         }