org.eclipse.dirigible.runtime.command.CommandDataParser.java Source code

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Here is the source code for org.eclipse.dirigible.runtime.command.CommandDataParser.java

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/******************************************************************************* 
 * Copyright (c) 2015 SAP and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0 
 * which accompanies this distribution, and is available at 
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *   SAP - initial API and implementation
 *******************************************************************************/

package org.eclipse.dirigible.runtime.command;

import java.util.Iterator;

import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;

public class CommandDataParser {

    /**
        
    {
        "description":"test command printing the os name and version",
        "contentType":"plain/text",
        "useContent":"false",
        "workDir":".",
        "commands": 
       [
           {
               "osName": "Linux",
               "command":"bash -c \"cat /proc/version\""
           }
           ,
           {
               "osName": "Windows",
               "command":"cmd /c \"systeminfo\""
           }
       ],
        "envAdd":
       [
           {
              "name":"java.env1",
               "value":"toBeAdded"
           }
       ],
        "envRemove":
       [
           {
               "name":"java.env2"
           }
       ]
    }
        
     */

    public static CommandData parseCommandData(String commandSource) throws IllegalArgumentException {
        JsonParser parser = new JsonParser();
        JsonObject commandObject = (JsonObject) parser.parse(commandSource);
        CommandData commandData = new CommandData();
        commandData.setDescription(commandObject.get("description").getAsString());
        commandData.setContentType(commandObject.get("contentType").getAsString());
        commandData.setUseContent(commandObject.get("useContent").getAsBoolean());
        commandData.setWorkDir(commandObject.get("workDir").getAsString());
        JsonArray commandsData = commandObject.get("commands").getAsJsonArray();
        Iterator<JsonElement> iter = commandsData.iterator();
        while (iter.hasNext()) {
            CommandLineData commandLineData = new CommandLineData();
            JsonObject object = (JsonObject) iter.next();
            commandLineData.setOsName(object.get("osName").getAsString());
            commandLineData.setCommand(object.get("command").getAsString());
            commandData.getCommands().add(commandLineData);
        }

        JsonArray envAddData = commandObject.get("envAdd").getAsJsonArray();
        iter = envAddData.iterator();
        while (iter.hasNext()) {
            JsonObject object = (JsonObject) iter.next();
            commandData.getEnvAdd().put(object.get("name").getAsString(), object.get("value").getAsString());
        }

        JsonArray envRemoveData = commandObject.get("envRemove").getAsJsonArray();
        iter = envRemoveData.iterator();
        while (iter.hasNext()) {
            JsonObject object = (JsonObject) iter.next();
            commandData.getEnvRemove().add(object.get("name").getAsString());
        }

        validateCommandData(commandData);

        return commandData;
    }

    private static void validateCommandData(CommandData commandData) throws IllegalArgumentException {
        if (commandData.getCommands().size() == 0) {
            throw new IllegalArgumentException("Commands array is empty. Set appropriate command per target OS");
        }

        String os = System.getProperty("os.name").toLowerCase();
        for (Iterator<CommandLineData> iterator = commandData.getCommands().iterator(); iterator.hasNext();) {
            CommandLineData commandLineData = iterator.next();
            if (os.startsWith(commandLineData.getOsName().toLowerCase())) {
                commandData.setTargetCommand(commandLineData);
                break;
            }
        }

        if (commandData.getTargetCommand() == null) {
            throw new IllegalArgumentException(String.format("There is no command for your OS: %s", os));
        }

    }

}