| /* |
| * Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.org> |
| * and other copyright owners as documented in the project's IP log. |
| * |
| * This program and the accompanying materials are made available |
| * under the terms of the Eclipse Distribution License v1.0 which |
| * accompanies this distribution, is reproduced below, and is |
| * available at http://www.eclipse.org/org/documents/edl-v10.php |
| * |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or |
| * without modification, are permitted provided that the following |
| * conditions are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * - Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials provided |
| * with the distribution. |
| * |
| * - Neither the name of the Eclipse Foundation, Inc. nor the |
| * names of its contributors may be used to endorse or promote |
| * products derived from this software without specific prior |
| * written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND |
| * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, |
| * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
| * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| package org.eclipse.jgit.pgm; |
| |
| import java.lang.reflect.Constructor; |
| import java.lang.reflect.InvocationTargetException; |
| import java.text.MessageFormat; |
| |
| import org.eclipse.jgit.pgm.internal.CLIText; |
| |
| /** |
| * Description of a command (a {@link TextBuiltin} subclass. |
| * <p> |
| * These descriptions are lightweight compared to creating a command instance |
| * and are therefore suitable for catalogs of "known" commands without linking |
| * the command's implementation and creating a dummy instance of the command. |
| */ |
| public class CommandRef { |
| private final Class<? extends TextBuiltin> impl; |
| |
| private final String name; |
| |
| private String usage; |
| |
| boolean common; |
| |
| CommandRef(final Class<? extends TextBuiltin> clazz) { |
| this(clazz, guessName(clazz)); |
| } |
| |
| CommandRef(final Class<? extends TextBuiltin> clazz, final Command cmd) { |
| this(clazz, cmd.name().length() > 0 ? cmd.name() : guessName(clazz)); |
| usage = cmd.usage(); |
| common = cmd.common(); |
| } |
| |
| private CommandRef(final Class<? extends TextBuiltin> clazz, final String cn) { |
| impl = clazz; |
| name = cn; |
| usage = ""; //$NON-NLS-1$ |
| } |
| |
| private static String guessName(final Class<? extends TextBuiltin> clazz) { |
| final StringBuilder s = new StringBuilder(); |
| if (clazz.getName().startsWith("org.eclipse.jgit.pgm.debug.")) //$NON-NLS-1$ |
| s.append("debug-"); //$NON-NLS-1$ |
| |
| boolean lastWasDash = true; |
| for (final char c : clazz.getSimpleName().toCharArray()) { |
| if (Character.isUpperCase(c)) { |
| if (!lastWasDash) |
| s.append('-'); |
| lastWasDash = !lastWasDash; |
| s.append(Character.toLowerCase(c)); |
| } else { |
| s.append(c); |
| lastWasDash = false; |
| } |
| } |
| return s.toString(); |
| } |
| |
| /** |
| * @return name the command is invoked as from the command line. |
| */ |
| public String getName() { |
| return name; |
| } |
| |
| /** |
| * @return one line description of the command's feature set. |
| */ |
| public String getUsage() { |
| return usage; |
| } |
| |
| /** |
| * @return true if this command is considered to be commonly used. |
| */ |
| public boolean isCommon() { |
| return common; |
| } |
| |
| /** |
| * @return name of the Java class which implements this command. |
| */ |
| public String getImplementationClassName() { |
| return impl.getName(); |
| } |
| |
| /** |
| * @return loader for {@link #getImplementationClassName()}. |
| */ |
| public ClassLoader getImplementationClassLoader() { |
| return impl.getClassLoader(); |
| } |
| |
| /** |
| * @return a new instance of the command implementation. |
| */ |
| public TextBuiltin create() { |
| final Constructor<? extends TextBuiltin> c; |
| try { |
| c = impl.getDeclaredConstructor(); |
| } catch (SecurityException e) { |
| throw new RuntimeException(MessageFormat.format(CLIText.get().cannotCreateCommand, getName(), e)); |
| } catch (NoSuchMethodException e) { |
| throw new RuntimeException(MessageFormat.format(CLIText.get().cannotCreateCommand, getName(), e)); |
| } |
| c.setAccessible(true); |
| |
| final TextBuiltin r; |
| try { |
| r = c.newInstance(); |
| } catch (InstantiationException e) { |
| throw new RuntimeException(MessageFormat.format(CLIText.get().cannotCreateCommand, getName(), e)); |
| } catch (IllegalAccessException e) { |
| throw new RuntimeException(MessageFormat.format(CLIText.get().cannotCreateCommand, getName(), e)); |
| } catch (IllegalArgumentException e) { |
| throw new RuntimeException(MessageFormat.format(CLIText.get().cannotCreateCommand, getName(), e)); |
| } catch (InvocationTargetException e) { |
| throw new RuntimeException(MessageFormat.format(CLIText.get().cannotCreateCommand, getName(), e)); |
| } |
| r.setCommandName(getName()); |
| return r; |
| } |
| } |