org.apache.gora.compiler.cli.GoraCompilerCLI.java Source code

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Here is the source code for org.apache.gora.compiler.cli.GoraCompilerCLI.java

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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.gora.compiler.cli;

import java.io.File;
import java.io.IOException;

import org.apache.commons.lang.ArrayUtils;
import org.apache.gora.compiler.GoraCompiler;
import org.apache.gora.compiler.utils.LicenseHeaders;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class GoraCompilerCLI {

    private static final Logger LOG = LoggerFactory.getLogger(GoraCompilerCLI.class);

    public static void main(String[] args) {
        if (args.length == 1 && (args[0].equals("--help") || args[0].equals("-h"))) {
            printHelp();
            System.exit(0);
        }
        if (args.length < 2) {
            LOG.error("Must supply at least one source file and an output directory.");
            printHelp();
            System.exit(1);
        }
        // Setting the default license header to ASLv2
        LicenseHeaders licenseHeader = new LicenseHeaders("ASLv2");
        // Checking for user provided license
        for (int i = 0; i < args.length; i++) {
            if ("-license".equals(args[i])) {
                if (i == args.length - 1) {
                    LOG.error("Must supply a valid license id.");
                    printHelp();
                    System.exit(1);
                }
                if (licenseHeader.isValidLicense(args[i + 1])) {
                    licenseHeader.setLicenseName(args[i + 1]);
                    args = (String[]) ArrayUtils.removeElement(args, args[i + 1]);
                    args = (String[]) ArrayUtils.removeElement(args, args[i]);
                } else {
                    LOG.error("Must supply a valid license id.");
                    printHelp();
                    System.exit(1);
                }
            }
        }

        File outputDir = new File(args[args.length - 1]);
        if (!outputDir.isDirectory()) {
            LOG.error("Must supply a directory for output");
            printHelp();
            System.exit(1);
        }
        // Processing input directory or input files
        File inputDir = new File(args[0]);
        File[] inputFiles = null;
        if (inputDir.isDirectory()) {
            if (inputDir.length() > 0)
                inputFiles = inputDir.listFiles();
            else {
                LOG.error("Input directory must include at least one file.");
                printHelp();
                System.exit(1);
            }
        } else {
            inputFiles = new File[args.length - 1];
            for (int i = 0; i < inputFiles.length; i++) {
                File inputFile = new File(args[i]);
                if (!inputFile.isFile()) {
                    LOG.error("Input must be a file.");
                    printHelp();
                    System.exit(1);
                }
                inputFiles[i] = inputFile;
            }
        }
        try {
            GoraCompiler.compileSchema(inputFiles, outputDir, licenseHeader);
            LOG.info("Compiler executed SUCCESSFULL.");
        } catch (IOException e) {
            LOG.error("Error while compiling schema files. Check that the schemas are properly formatted.");
            printHelp();
            throw new RuntimeException(e);
        }
    }

    private static void printHelp() {
        LOG.info("Usage: gora-compiler ( -h | --help ) | (<input> [<input>...] <output> [-license <id>])");
        LOG.error("License header options include;\n" + "\t\t  ASLv2   (Apache Software License v2.0) \n"
                + "\t\t  AGPLv3  (GNU Affero General Public License) \n"
                + "\t\t  CDDLv1  (Common Development and Distribution License v1.0) \n"
                + "\t\t  FDLv13  (GNU Free Documentation License v1.3) \n"
                + "\t\t  GPLv1   (GNU General Public License v1.0) \n"
                + "\t\t  GPLv2   (GNU General Public License v2.0) \n"
                + "\t\t  GPLv3   (GNU General Public License v3.0) \n"
                + "\t\t  LGPLv21 (GNU Lesser General Public License v2.1) \n"
                + "\t\t  LGPLv3  (GNU Lesser General Public License v2.1)");
    }
}