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- /*
- * Copyright (C) 2016, Matthias Sohn <matthias.sohn@sap.com>
- * 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.attributes;
-
- import java.io.IOException;
- import java.io.InputStream;
- import java.io.OutputStream;
- import java.util.Set;
- import java.util.concurrent.ConcurrentHashMap;
-
- import org.eclipse.jgit.lib.Repository;
-
- /**
- * Registry for built-in filters
- *
- * @since 4.6
- */
- public class FilterCommandRegistry {
- private static ConcurrentHashMap<String, FilterCommandFactory> filterCommandRegistry = new ConcurrentHashMap<>();
-
- /**
- * Registers a {@link FilterCommandFactory} responsible for creating
- * {@link FilterCommand}s for a certain command name. If the factory f1 is
- * registered for the name "jgit://builtin/x" then a call to
- * <code>getCommand("jgit://builtin/x", ...)</code> will call
- * <code>f1(...)</code> to create a new instance of {@link FilterCommand}
- *
- * @param filterCommandName
- * the command name for which this factory is registered
- * @param factory
- * the factory responsible for creating {@link FilterCommand}s
- * for the specified name
- * @return the previous factory associated with <tt>commandName</tt>, or
- * <tt>null</tt> if there was no mapping for <tt>commandName</tt>
- */
- public static FilterCommandFactory register(String filterCommandName,
- FilterCommandFactory factory) {
- return filterCommandRegistry.put(filterCommandName, factory);
- }
-
- /**
- * Unregisters the {@link FilterCommandFactory} registered for the given
- * command name
- *
- * @param filterCommandName
- * the FilterCommandFactory's filter command name
- * @return the previous factory associated with <tt>filterCommandName</tt>,
- * or <tt>null</tt> if there was no mapping for <tt>commandName</tt>
- */
- public static FilterCommandFactory unregister(String filterCommandName) {
- return filterCommandRegistry.remove(filterCommandName);
- }
-
- /**
- * Checks whether any {@link FilterCommandFactory} is registered for a given
- * command name
- *
- * @param filterCommandName
- * the name for which the registry should be checked
- * @return <code>true</code> if any factory was registered for the name
- */
- public static boolean isRegistered(String filterCommandName) {
- return filterCommandRegistry.containsKey(filterCommandName);
- }
-
- /**
- * @return Set of commandNames for which a {@link FilterCommandFactory} is
- * registered
- */
- public static Set<String> getRegisteredFilterCommands() {
- return filterCommandRegistry.keySet();
- }
-
- /**
- * Creates a new {@link FilterCommand} for the given name. A factory must be
- * registered for the name in advance.
- *
- * @param filterCommandName
- * The name for which a new {@link FilterCommand} should be
- * created
- * @param db
- * the repository this command should work on
- * @param in
- * the {@link InputStream} this {@link FilterCommand} should read
- * from
- * @param out
- * the {@link OutputStream} this {@link FilterCommand} should
- * write to
- * @return the command if a command could be created or <code>null</code> if
- * there was no factory registered for that name
- * @throws IOException
- */
- public static FilterCommand createFilterCommand(String filterCommandName,
- Repository db, InputStream in, OutputStream out)
- throws IOException {
- FilterCommandFactory cf = filterCommandRegistry.get(filterCommandName);
- return (cf == null) ? null : cf.create(db, in, out);
- }
-
- }
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