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- /*
- * 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;
-
- /**
- * 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;
- }
- }
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