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/*
* Copyright (C) 2019, Google LLC. 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.transport;
import java.util.Collections;
import java.util.List;
import java.util.stream.Collectors;
/**
* {@link org.eclipse.jgit.transport.ProtocolV2Hook} that delegates to a list of
* other hooks.
* <p>
* Hooks are run in the order passed to the constructor. If running a method on
* one hook throws an exception, execution of remaining hook methods is aborted.
*
* @since 5.5
*/
public class ProtocolV2HookChain implements ProtocolV2Hook {
private final List<? extends ProtocolV2Hook> hooks;
/**
* Create a new hook chaining the given hooks together.
*
* @param hooks
* hooks to execute, in order.
* @return a new hook chain of the given hooks.
*/
public static ProtocolV2Hook newChain(
List<? extends ProtocolV2Hook> hooks) {
List<? extends ProtocolV2Hook> newHooks = hooks.stream()
.filter(hook -> !hook.equals(ProtocolV2Hook.DEFAULT))
.collect(Collectors.toList());
if (newHooks.isEmpty()) {
return ProtocolV2Hook.DEFAULT;
} else if (newHooks.size() == 1) {
return newHooks.get(0);
} else {
return new ProtocolV2HookChain(newHooks);
}
}
@Override
public void onCapabilities(CapabilitiesV2Request req)
throws ServiceMayNotContinueException {
for (ProtocolV2Hook hook : hooks) {
hook.onCapabilities(req);
}
}
@Override
public void onLsRefs(LsRefsV2Request req)
throws ServiceMayNotContinueException {
for (ProtocolV2Hook hook : hooks) {
hook.onLsRefs(req);
}
}
@Override
public void onFetch(FetchV2Request req)
throws ServiceMayNotContinueException {
for (ProtocolV2Hook hook : hooks) {
hook.onFetch(req);
}
}
private ProtocolV2HookChain(List<? extends ProtocolV2Hook> hooks) {
this.hooks = Collections.unmodifiableList(hooks);
}
}
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