net.riezebos.thoth.server.commands.ServerCommand.java Source code

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Here is the source code for net.riezebos.thoth.server.commands.ServerCommand.java

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/* Copyright (c) 2016 W.T.J. Riezebos
 *
 * 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 net.riezebos.thoth.server.commands;

import org.apache.commons.lang3.StringUtils;

import net.riezebos.thoth.configuration.ThothEnvironment;

public abstract class ServerCommand {
    private ThothEnvironment thothEnvironment;

    public abstract String getName();

    public abstract String getDescription();

    public abstract void execute(String commandLine) throws Exception;

    public ServerCommand(ThothEnvironment thothEnvironment) {
        this.thothEnvironment = thothEnvironment;
    }

    public ThothEnvironment getThothEnvironment() {
        return thothEnvironment;
    }

    public boolean applies(String commandLine) {
        if (StringUtils.isBlank(commandLine))
            return false;
        return commandLine.toLowerCase().startsWith(getName());
    }

    public boolean argumentsOk(String commandLine) {
        return commandLine.split("\\s").length == getNumberOfArguments() + 1;
    }

    protected int getNumberOfArguments() {
        return 0;
    }

    protected String getArgument(String commandLine, int i) {
        String[] args = commandLine.split("\\s");
        return args[i];
    }

    public void println(String message) {
        System.out.println(message);
    }

    public String getUsage() {
        String result = getName();
        for (String argName : getArguments())
            result += " <" + argName + ">";
        return result;
    }

    protected String[] getArguments() {
        return new String[0];
    }

}