- /*
- * Copyright (C) 2016, Matthias Sohn <matthias.sohn@sap.com> and others
- *
- * This program and the accompanying materials are made available under the
- * terms of the Eclipse Distribution License v. 1.0 which is available at
- * https://www.eclipse.org/org/documents/edl-v10.php.
- *
- * SPDX-License-Identifier: BSD-3-Clause
- */
- package org.eclipse.jgit.attributes;
-
- import java.io.IOException;
- import java.io.InputStream;
- import java.io.OutputStream;
- import java.util.Map;
- 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 Map<String, FilterCommandFactory> filterCommandRegistry = new ConcurrentHashMap<>();
-
- /**
- * Register a {@link org.eclipse.jgit.attributes.FilterCommandFactory}
- * responsible for creating
- * {@link org.eclipse.jgit.attributes.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 org.eclipse.jgit.attributes.FilterCommand}
- *
- * @param filterCommandName
- * the command name for which this factory is registered
- * @param factory
- * the factory responsible for creating
- * {@link org.eclipse.jgit.attributes.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);
- }
-
- /**
- * Unregister the {@link org.eclipse.jgit.attributes.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);
- }
-
- /**
- * Check whether any
- * {@link org.eclipse.jgit.attributes.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);
- }
-
- /**
- * Get registered filter commands
- *
- * @return Set of commandNames for which a
- * {@link org.eclipse.jgit.attributes.FilterCommandFactory} is
- * registered
- */
- public static Set<String> getRegisteredFilterCommands() {
- return filterCommandRegistry.keySet();
- }
-
- /**
- * Create a new {@link org.eclipse.jgit.attributes.FilterCommand} for the
- * given name. A factory must be registered for the name in advance.
- *
- * @param filterCommandName
- * The name for which a new
- * {@link org.eclipse.jgit.attributes.FilterCommand} should be
- * created
- * @param db
- * the repository this command should work on
- * @param in
- * the {@link java.io.InputStream} this
- * {@link org.eclipse.jgit.attributes.FilterCommand} should read
- * from
- * @param out
- * the {@link java.io.OutputStream} this
- * {@link org.eclipse.jgit.attributes.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 java.io.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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