com.anrisoftware.mongoose.buildins.echobuildin.EchoBuildin.java Source code

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Here is the source code for com.anrisoftware.mongoose.buildins.echobuildin.EchoBuildin.java

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/*
 * Copyright 2012 Erwin Mller <erwin.mueller@deventm.org>
 * 
 * This file is part of groovybash-core.
 * 
 * groovybash-core is free software: you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation, either version 3 of the License, or (at your option) any
 * later version.
 * 
 * groovybash-core is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
 * details.
 * 
 * You should have received a copy of the GNU General Public License along with
 * groovybash-core. If not, see <http://www.gnu.org/licenses/>.
 */
package com.anrisoftware.mongoose.buildins.echobuildin;

import static java.lang.Boolean.FALSE;

import java.io.PrintStream;
import java.util.List;
import java.util.Map;

import org.apache.commons.lang3.StringUtils;

import com.anrisoftware.mongoose.command.AbstractCommand;

/**
 * The build-in command {@code echo}.
 * 
 * @author Erwin Mueller, erwin.mueller@deventm.org
 * @since 1.0
 */
class EchoBuildin extends AbstractCommand {

    private static final String NEWLINE = "newline";

    private static final String SEPARATOR = " ";

    private OutputWorker output;

    private String text;

    EchoBuildin() {
        this.output = createOutputNewLine();
        this.text = "";
    }

    @Override
    protected void doCall() {
        PrintStream stream = new PrintStream(getOutput());
        output.output(stream, text);
        stream.flush();
    }

    @Override
    protected void argumentsSet(Map<String, Object> args, List<Object> unnamedArgs) {
        setupNamed(args);
        setupUnnamed(unnamedArgs);
    }

    private void setupUnnamed(List<Object> unnamedArgs) {
        text = StringUtils.join(unnamedArgs, SEPARATOR);
    }

    private void setupNamed(Map<String, Object> args) {
        if (args.containsKey(NEWLINE)) {
            if (((Boolean) args.get(NEWLINE)).equals(FALSE)) {
                output = createOutputNoNewLine();
            } else {
                output = createOutputNewLine();
            }
        }
    }

    private OutputWorker createOutputNoNewLine() {
        return new OutputWorker() {

            @Override
            public void output(PrintStream output, String text) {
                output.print(text);
            }
        };
    }

    private OutputWorker createOutputNewLine() {
        return new OutputWorker() {

            @Override
            public void output(PrintStream output, String text) {
                output.println(text);
            }

        };
    }

    /**
     * Returns the name {@code echo}.
     */
    @Override
    public String getTheName() {
        return EchoService.ID;
    }
}