org.bitbucket.bradleysmithllc.etlunit.cli.DescribeCmd Maven / Gradle / Ivy

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package org.bitbucket.bradleysmithllc.etlunit.cli;

import org.clamshellcli.api.Command;
import org.clamshellcli.api.Configurator;
import org.clamshellcli.api.Context;
import org.clamshellcli.api.IOConsole;
import org.bitbucket.bradleysmithllc.etlunit.feature.*;

import java.util.Collections;
import java.util.List;
import java.util.Map;

public class DescribeCmd implements Command {
	private static final String NAMESPACE = "syscmd";
	public static final String ACTION_NAME = "describe";

	public Descriptor getDescriptor() {
		return new Descriptor() {
			public String getNamespace() {
				return NAMESPACE;
			}

			public String getName() {
				return ACTION_NAME;
			}

			public String getDescription() {
				return "Displays meta information about a feature and / or operations";
			}

			public String getUsage() {
				return "describe  (operation)?";
			}

			public Map getArguments() {
				return Collections.emptyMap();
			}
		};
	}

	public Object execute(Context context) {
		String [] inputLine = (String []) context.getValue(Context.KEY_COMMAND_LINE_ARGS);

		IOConsole console = context.getIoConsole();

		// the first argument is the feature name
		if (inputLine == null || inputLine.length < 1)
		{
			console.writeOutput("Missing feature name" + Configurator.VALUE_LINE_SEP);

			return null;
		}

		ServiceLocatorFeatureLocator locator = new ServiceLocatorFeatureLocator();

		List list = locator.getFeatures(FeatureLocator.feature_type.external);

			if (list.size() != 0) {
				String featureName = inputLine[0];

				for (Feature feature : list) {
					if (feature.getFeatureName().equals(featureName))
					{
						FeatureMetaInfo metaInfo = feature.getMetaInfo();

						if (inputLine.length == 1)
						{
							String featureUsage = metaInfo.getFeatureUsage();
							if (featureUsage != null)
							{
								console.writeOutput(featureUsage + Configurator.VALUE_LINE_SEP);

								String config = metaInfo.getFeatureConfiguration();

								if (config != null)
								{
									console.writeOutput(config + Configurator.VALUE_LINE_SEP);
								}
								else
								{
									console.writeOutput("Feature does not provide configuration information" + Configurator.VALUE_LINE_SEP);
								}

								Map ops = metaInfo.getExportedOperations();

								if (ops != null)
								{
									console.writeOutput("exported operations:" + Configurator.VALUE_LINE_SEP);

									for (Map.Entry operationEntry : ops.entrySet())
									{
										String operation = operationEntry.getKey();
										String desc = operationEntry.getValue().getDescription();

										if (desc == null)
										{
											desc = "NA";
										}

										console.writeOutput("\t" + operation + "\t\t" + desc + Configurator.VALUE_LINE_SEP);
									}
								}
								else
								{
									console.writeOutput("Feature does not provide operation information" + Configurator.VALUE_LINE_SEP);
								}
							}
							else
							{
								console.writeOutput("Feature " + featureName + " does not provide any description" + Configurator.VALUE_LINE_SEP);
							}
						}
						else
						{
							// grab an operation
							String operation = inputLine[1];

							Map ops = metaInfo.getExportedOperations();

							FeatureOperation featureOperation = ops.get(operation);
							if (ops == null || featureOperation == null)
							{
								console.writeOutput("Feature " + featureName + " does not export operation " + operation + Configurator.VALUE_LINE_SEP);
								return null;
							}

							String proto = featureOperation.getPrototype();
							String usage = featureOperation.getUsage();
							String desc = featureOperation.getDescription();

							if (proto == null && usage == null && desc == null)
							{
								console.writeOutput("Operation " + operation + " does not provide any description" + Configurator.VALUE_LINE_SEP);
							}
							else
							{
								if (proto == null)
								{
									proto = "NA";
								}
								if (usage == null)
								{
									usage = "NA";
								}
								if (desc == null)
								{
									desc = "NA";
								}

								console.writeOutput("Description:" + Configurator.VALUE_LINE_SEP);
								console.writeOutput("\t" + desc + Configurator.VALUE_LINE_SEP);
								console.writeOutput("Prototype:" + Configurator.VALUE_LINE_SEP);
								console.writeOutput("\t" + proto + Configurator.VALUE_LINE_SEP);
								console.writeOutput("Usage:" + Configurator.VALUE_LINE_SEP);
								console.writeOutput("\t" + usage + Configurator.VALUE_LINE_SEP);
							}
						}

						return null;
					}
				}

				console.writeOutput("Feature " + featureName + " could not be located" + Configurator.VALUE_LINE_SEP);
			} else {
				console.writeOutput("No features available" + Configurator.VALUE_LINE_SEP);
			}

		return null;
	}

	public void plug(Context context) {
	}
}