Java tutorial
/* * Copyright (C) 2011 Everit Kft. (http://www.everit.biz) * * 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.everit.persistence.lqmg; import org.apache.commons.cli.BasicParser; import org.apache.commons.cli.CommandLine; import org.apache.commons.cli.CommandLineParser; import org.apache.commons.cli.HelpFormatter; import org.apache.commons.cli.Options; import org.apache.commons.cli.ParseException; /** * The main class of the LQMG. */ public final class LQMGMain { public static final String ARG_BUNDLES = "bundles"; public static final String ARG_CAPABILITY = "capability"; public static final String ARG_DEFAULT_SCHEMA = "defaultSchema"; public static final String ARG_HACK_WIRES = "hackWires"; public static final String ARG_INNER_CLASSES_FOR_KEYS = "innerClassesForKeys"; public static final String ARG_LQMG_CONFIG_XML = "configurationXML"; public static final String ARG_OUTPUT_FOLDER = "outputFolder"; public static final String ARG_PACKAGES = "packages"; private static String evaluateMandatoryOptionValue(final String key, final CommandLine commandLine, final Options options) { String result = commandLine.getOptionValue(key); if (result == null) { LQMGMain.printHelp(options); IllegalArgumentException e = new IllegalArgumentException("Missing mandatory argument: " + key); e.setStackTrace(new StackTraceElement[0]); throw e; } return result; } /** * The command line processor. * * @param args * the arguments. */ public static void main(final String[] args) { Options options = new Options(); options.addOption("b", ARG_BUNDLES, true, "Location to the bundles separated by semicolon"); options.addOption("p", ARG_PACKAGES, true, "Package names separated by comma that should be generated." + " If not defined, all packages will be generated."); options.addOption("cp", ARG_CAPABILITY, true, "Expression that is used to select the first capability based on the" + " capabilities that are provided by the bundles."); options.addOption("o", ARG_OUTPUT_FOLDER, true, "Path of the folder where the classes should be" + " generated"); options.addOption("c", ARG_LQMG_CONFIG_XML, true, "Path of an optional configuration XML that can override" + " configurations coming from the capabilities"); options.addOption("h", ARG_HACK_WIRES, true, "Whether to try redeploy bundles with unsatisfied constraintsin" + " the way that their requirements are changed to be optional. Default: true"); options.addOption("h", ARG_INNER_CLASSES_FOR_KEYS, true, "Whether to generate inner classes for constraints. Default: true"); options.addOption("ds", ARG_DEFAULT_SCHEMA, true, "Default schema where tables will be generated. This schema will be passed in the " + "constructor of the generated metadata classes where the liquibase changelog file " + "does not contain schema information. It is recommended to define a unique value " + "and use the runtime schema renaming functionality of QueryDSL."); CommandLineParser commandLineParser = new BasicParser(); CommandLine commandLine; try { commandLine = commandLineParser.parse(options, args, true); } catch (ParseException e) { LQMGMain.printHelp(options); RuntimeException returnE = new RuntimeException(e); returnE.setStackTrace(new StackTraceElement[0]); throw returnE; } String outputFolder = LQMGMain.evaluateMandatoryOptionValue(ARG_OUTPUT_FOLDER, commandLine, options); String bundles = LQMGMain.evaluateMandatoryOptionValue(ARG_BUNDLES, commandLine, options); String changelog = LQMGMain.evaluateMandatoryOptionValue(ARG_CAPABILITY, commandLine, options); String packages = commandLine.getOptionValue(ARG_PACKAGES); String configurationXMLPath = commandLine.getOptionValue(ARG_LQMG_CONFIG_XML); String hackWires = commandLine.getOptionValue(ARG_HACK_WIRES); String innerClassesForKeys = commandLine.getOptionValue(ARG_INNER_CLASSES_FOR_KEYS); String defaultSchema = commandLine.getOptionValue(ARG_DEFAULT_SCHEMA); GenerationProperties generationProps = new GenerationProperties(changelog, bundles.split("\\;"), outputFolder); generationProps.setConfigurationPath(configurationXMLPath); generationProps.setDefaultSchema(defaultSchema); if (packages != null) { generationProps.setPackages(packages.split("\\,")); } if (hackWires != null) { generationProps.setHackWires(Boolean.valueOf(hackWires)); } if (innerClassesForKeys != null) { generationProps.setHackWires(Boolean.valueOf(innerClassesForKeys)); } LQMG.generate(generationProps); } private static void printHelp(final Options options) { HelpFormatter helperFormatter = new HelpFormatter(); helperFormatter.printHelp("java -jar lqmg.jar", options); } private LQMGMain() { } }