org.mvel2.sh.command.basic.ShowVars Maven / Gradle / Ivy

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/**
 * MVEL 2.0
 * Copyright (C) 2007 The Codehaus
 * Mike Brock, Dhanji Prasanna, John Graham, Mark Proctor
 *
 * 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.mvel2.sh.command.basic;

import java.util.Map;

import org.mvel2.sh.Command;
import org.mvel2.sh.CommandException;
import org.mvel2.sh.ShellSession;

public class ShowVars implements Command {

    public Object execute(ShellSession session, String[] args) {
        boolean values = false;

        Map vars = session.getVariables();

        for (int i = 0; i < args.length; i++) {
            if ("-values".equals(args[i])) values = true;
            else throw new CommandException("unknown argument: " + args[i]);
        }

        System.out.println("Printing Variables ...");
        if (values) {
            for (String key : vars.keySet()) {
                System.out.println(key + " => " + String.valueOf(vars.get(key)));
            }
        } else {
            for (String key : vars.keySet()) {
                System.out.println(key);
            }
        }

        System.out.println(" ** " + vars.size() + " variables total.");

        return null;
    }

    public String getDescription() {
        return "shows current variables";
    }

    public String getHelp() {
        return "no help yet";
    }
}