1 /******************************************************************************* 2 * Copyright (c) 2009, 2018 Mountainminds GmbH & Co. KG and Contributors 3 * All rights reserved. This program and the accompanying materials 4 * are made available under the terms of the Eclipse Public License v1.0 5 * which accompanies this distribution, and is available at 6 * http://www.eclipse.org/legal/epl-v10.html 7 * 8 * Contributors: 9 * Marc R. Hoffmann - initial API and implementation 10 * 11 *******************************************************************************/ 12 package org.jacoco.cli.internal; 13 14 import java.util.AbstractList; 15 16 import org.jacoco.cli.internal.commands.AllCommands; 17 import org.kohsuke.args4j.CmdLineException; 18 import org.kohsuke.args4j.CmdLineParser; 19 import org.kohsuke.args4j.OptionDef; 20 import org.kohsuke.args4j.spi.Messages; 21 import org.kohsuke.args4j.spi.OptionHandler; 22 import org.kohsuke.args4j.spi.Parameters; 23 import org.kohsuke.args4j.spi.Setter; 24 25 /** 26 * {@link OptionHandler} which uses {@link CommandParser} internally to provide 27 * help context also for sub-commands. 28 */ 29 public class CommandHandler extends OptionHandler<Command> { 30 31 /** 32 * This constructor is required by the args4j framework. 33 * 34 * @param parser 35 * @param option 36 * @param setter 37 */ 38 public CommandHandler(final CmdLineParser parser, final OptionDef option, 39 final Setter<Object> setter) { 40 super(parser, 41 new OptionDef(AllCommands.names(), "<command>", 42 option.required(), option.help(), option.hidden(), 43 CommandHandler.class, option.isMultiValued()) { 44 }, setter); 45 } 46 47 @Override 48 public int parseArguments(final Parameters params) throws CmdLineException { 49 final String subCmd = params.getParameter(0); 50 51 for (final Command c : AllCommands.get()) { 52 if (c.name().equals(subCmd)) { 53 parseSubArguments(c, params); 54 setter.addValue(c); 55 return params.size(); // consume all the remaining tokens 56 } 57 } 58 59 throw new CmdLineException(owner, 60 Messages.ILLEGAL_OPERAND.format(option.toString(), subCmd)); 61 } 62 63 private void parseSubArguments(final Command c, final Parameters params) 64 throws CmdLineException { 65 final CmdLineParser p = new CommandParser(c); 66 p.parseArgument(new AbstractList<String>() { 67 @Override 68 public String get(final int index) { 69 try { 70 return params.getParameter(index + 1); 71 } catch (final CmdLineException e) { 72 // invalid index was accessed. 73 throw new IndexOutOfBoundsException(); 74 } 75 } 76 77 @Override 78 public int size() { 79 return params.size() - 1; 80 } 81 }); 82 } 83 84 @Override 85 public String getDefaultMetaVariable() { 86 return "<command>"; 87 } 88 89 } 90
