com.github.adeshmukh.pom2fs.Main.java Source code

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Here is the source code for com.github.adeshmukh.pom2fs.Main.java

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/*
 * Copyright (c) 2012 Amol S Deshmukh http://www.github.com/adeshmukh
 *
 * 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 com.github.adeshmukh.pom2fs;

import static java.lang.System.err;
import static java.lang.System.out;

import java.io.InputStream;

import org.kohsuke.args4j.CmdLineParser;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.github.adeshmukh.xml2fs.Xml2fs;
import com.github.adeshmukh.xml2fs.Xml2fsModule;
import com.google.common.io.Closeables;
import com.google.inject.Guice;
import com.google.inject.Injector;

/**
 * @author adeshmukh
 *         Command line launcher for the pom2fs tool.
 */
public class Main {

    private static final Logger log = LoggerFactory.getLogger(Main.class);

    private static final CmdLineOptions cli = new CmdLineOptions();
    private static final CmdLineParser clip = new CmdLineParser(cli);

    /**
     * @param args
     */
    public static void main(String[] args) throws Exception {
        InputStream is = null;
        try {
            clip.parseArgument(args);

            if (cli.showUsage()) {
                clip.printUsage(out);
            } else {
                Injector injector = Guice.createInjector(new Xml2fsModule(cli.getOutputDir()),
                        new PomExtractorModule());
                Xml2fs xml2fs = injector.getInstance(Xml2fs.class);
                xml2fs.run(cli.getInputStream());
            }
        } catch (Exception e) {
            handleError(e);
        } finally {
            Closeables.closeQuietly(is);
        }
    }

    private static void handleError(Exception e) {
        log.error("", e);
        System.err.println(e.getMessage());
        clip.printUsage(err);
    }
}