org.bidib.wizard.common.script.AbstractScriptCommandFactory Maven / Gradle / Ivy

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package org.bidib.wizard.common.script;

import java.lang.reflect.InvocationTargetException;
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;

import org.bidib.wizard.api.script.ScriptCommand;
import org.bidib.wizard.api.script.Scripting;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public abstract class AbstractScriptCommandFactory {
    private static final Logger LOGGER = LoggerFactory.getLogger(AbstractScriptCommandFactory.class);

    protected final Map>> scriptCommands =
        new HashMap>>();

    public AbstractScriptCommandFactory() {
    }

    public abstract void registerCommands();

    public ScriptCommand parse(String line) {
        Scanner scanner = new Scanner(line);
        String key = scanner.next();
        ScriptCommand command = getScriptCommand(key);
        if (command != null) {
            command.parse(line);
        }
        scanner.close();
        return command;
    }

    private ScriptCommand getScriptCommand(String key) {
        Class clazz = scriptCommands.get(key);
        if (clazz == null) {
            LOGGER.warn("Command is not registered: {}", key);
            return null;
        }
        try {
            return (ScriptCommand) clazz.getDeclaredConstructor().newInstance();
        }
        catch (InstantiationException | IllegalAccessException | IllegalArgumentException | InvocationTargetException
            | NoSuchMethodException | SecurityException e) {
            LOGGER.warn("Create script command class failed.", e);
        }
        return null;
    }
}