001    /*
002     * Sonar, open source software quality management tool.
003     * Copyright (C) 2008-2011 SonarSource
004     * mailto:contact AT sonarsource DOT com
005     *
006     * Sonar is free software; you can redistribute it and/or
007     * modify it under the terms of the GNU Lesser General Public
008     * License as published by the Free Software Foundation; either
009     * version 3 of the License, or (at your option) any later version.
010     *
011     * Sonar is distributed in the hope that it will be useful,
012     * but WITHOUT ANY WARRANTY; without even the implied warranty of
013     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014     * Lesser General Public License for more details.
015     *
016     * You should have received a copy of the GNU Lesser General Public
017     * License along with Sonar; if not, write to the Free Software
018     * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02
019     */
020    package org.sonar.api.utils.command;
021    
022    import com.google.common.base.Joiner;
023    import com.google.common.collect.Lists;
024    import org.apache.commons.lang.StringUtils;
025    
026    import java.util.Arrays;
027    import java.util.Collections;
028    import java.util.List;
029    
030    /**
031     * @since 2.7
032     */
033    public final class Command {
034    
035      private String executable;
036      private List<String> arguments = Lists.newArrayList();
037    
038      private Command(String executable) {
039        this.executable = executable;
040      }
041    
042      public String getExecutable() {
043        return executable;
044      }
045    
046      public List<String> getArguments() {
047        return Collections.unmodifiableList(arguments);
048      }
049    
050      public Command addArgument(String arg) {
051        arguments.add(arg);
052        return this;
053      }
054    
055      public Command addArguments(List<String> args) {
056        arguments.addAll(args);
057        return this;
058      }
059    
060      public Command addArguments(String[] args) {
061        arguments.addAll(Arrays.asList(args));
062        return this;
063      }
064    
065      String[] toStrings() {
066        List<String> command = Lists.newArrayList();
067        command.add(executable);
068        command.addAll(arguments);
069        return command.toArray(new String[command.size()]);
070      }
071    
072      public String toCommandLine() {
073        return Joiner.on(" ").join(toStrings());
074      }
075    
076      @Override
077      public String toString() {
078        return toCommandLine();
079      }
080    
081      /**
082       * Create a command line without any arguments
083       * @param executable
084       */
085      public static Command create(String executable) {
086        if (StringUtils.isBlank(executable)) {
087          throw new IllegalArgumentException("Command executable can not be blank");
088        }
089        return new Command(executable);
090      }
091    }