Java tutorial
/** * OpenSpotLight - Open Source IT Governance Platform * * Copyright (c) 2009, CARAVELATECH CONSULTORIA E TECNOLOGIA EM INFORMATICA LTDA * or third-party contributors as indicated by the @author tags or express * copyright attribution statements applied by the authors. All third-party * contributions are distributed under license by CARAVELATECH CONSULTORIA E * TECNOLOGIA EM INFORMATICA LTDA. * * This copyrighted material is made available to anyone wishing to use, modify, * copy, or redistribute it subject to the terms and conditions of the GNU * Lesser General Public License, as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * * See the GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this distribution; if not, write to: * Free Software Foundation, Inc. * 51 Franklin Street, Fifth Floor * Boston, MA 02110-1301 USA * *********************************************************************** * OpenSpotLight - Plataforma de Governana de TI de Cdigo Aberto * * Direitos Autorais Reservados (c) 2009, CARAVELATECH CONSULTORIA E TECNOLOGIA * EM INFORMATICA LTDA ou como contribuidores terceiros indicados pela etiqueta * @author ou por expressa atribuio de direito autoral declarada e atribuda pelo autor. * Todas as contribuies de terceiros esto distribudas sob licena da * CARAVELATECH CONSULTORIA E TECNOLOGIA EM INFORMATICA LTDA. * * Este programa software livre; voc pode redistribu-lo e/ou modific-lo sob os * termos da Licena Pblica Geral Menor do GNU conforme publicada pela Free Software * Foundation. * * Este programa distribudo na expectativa de que seja til, porm, SEM NENHUMA * GARANTIA; nem mesmo a garantia implcita de COMERCIABILIDADE OU ADEQUAO A UMA * FINALIDADE ESPEC?FICA. Consulte a Licena Pblica Geral Menor do GNU para mais detalhes. * * Voc deve ter recebido uma cpia da Licena Pblica Geral Menor do GNU junto com este * programa; se no, escreva para: * Free Software Foundation, Inc. * 51 Franklin Street, Fifth Floor * Boston, MA 02110-1301 USA */ package org.openspotlight.graph.query.console.command.system; import java.io.PrintWriter; import java.util.Collection; import jline.ConsoleReader; import org.apache.commons.lang.StringUtils; import org.openspotlight.common.util.Assertions; import org.openspotlight.graph.query.console.ConsoleState; import org.openspotlight.graph.query.console.command.Command; import org.openspotlight.graph.query.console.command.SystemCommand; /** * The Class HelpSystemCommand. This system command display all command descriptions. * * @author porcelli */ public class HelpSystemCommand implements SystemCommand { /** The descriptions. */ String[] descriptions; /** * Instantiates a new help system command. * * @param commands all the commands (system and dynamic) */ public HelpSystemCommand(final Collection<Command> commands) { int maxSize = 4; if (commands != null) { int size = 0; for (final Command command : commands) { if (command != null) { size++; } } descriptions = new String[size + 1]; for (final Command command : commands) { if (command != null && command.getCommand().length() > maxSize) { maxSize = command.getCommand().length(); } } int i = 0; for (final Command command : commands) { if (command != null) { descriptions[i] = StringUtils.leftPad(command.getCommand(), maxSize) + " - " + command.getDescription(); i++; } } } else { descriptions = new String[1]; } descriptions[0] = StringUtils.leftPad("help", maxSize) + " - " + getDescription(); } /** * {@inheritDoc} */ @Override public boolean accept(final ConsoleState state) { Assertions.checkNotNull("state", state); if (state.getActiveCommand() == null && state.getInput().trim().equals("help")) { return true; } return false; } /** * {@inheritDoc} */ @Override public void execute(final ConsoleReader reader, final PrintWriter out, final ConsoleState state) { Assertions.checkNotNull("reader", reader); Assertions.checkNotNull("out", out); Assertions.checkNotNull("state", state); if (!accept(state)) { return; } for (final String activeDesc : descriptions) { out.println(activeDesc); } out.flush(); state.setInput(null); state.clearBuffer(); } /** * {@inheritDoc} */ @Override public String getAutoCompleteCommand() { return getCommand(); } /** * {@inheritDoc} */ @Override public String getCommand() { return "help"; } /** * {@inheritDoc} */ @Override public String getDescription() { return "display these instructions"; } /** * {@inheritDoc} */ @Override public String getFileCompletionCommand() { return null; } /** * {@inheritDoc} */ @Override public FileCompletionMode getFileCompletionMode() { return null; } /** * {@inheritDoc} */ @Override public boolean hasFileCompletion() { return false; } }