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/*
* Copyright (C) 2012, Google Inc. 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.io.IOException;
import java.util.List;
/**
* {@link org.eclipse.jgit.transport.AdvertiseRefsHook} that delegates to a list
* of other hooks.
* <p>
* Hooks are run in the order passed to the constructor. A hook may inspect or
* modify the results of the previous hooks in the chain by calling
* {@link org.eclipse.jgit.transport.UploadPack#getAdvertisedRefs()}, or
* {@link org.eclipse.jgit.transport.ReceivePack#getAdvertisedRefs()} or
* {@link org.eclipse.jgit.transport.ReceivePack#getAdvertisedObjects()}.
*/
public class AdvertiseRefsHookChain implements AdvertiseRefsHook {
private final AdvertiseRefsHook[] hooks;
private final int count;
/**
* 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 AdvertiseRefsHook newChain(List<? extends AdvertiseRefsHook> hooks) {
AdvertiseRefsHook[] newHooks = new AdvertiseRefsHook[hooks.size()];
int i = 0;
for (AdvertiseRefsHook hook : hooks)
if (hook != AdvertiseRefsHook.DEFAULT)
newHooks[i++] = hook;
switch (i) {
case 0:
return AdvertiseRefsHook.DEFAULT;
case 1:
return newHooks[0];
default:
return new AdvertiseRefsHookChain(newHooks, i);
}
}
@Override
public void advertiseRefs(ReceivePack rp)
throws IOException {
for (int i = 0; i < count; i++)
hooks[i].advertiseRefs(rp);
}
@Override
public void advertiseRefs(UploadPack rp)
throws ServiceMayNotContinueException {
for (int i = 0; i < count; i++)
hooks[i].advertiseRefs(rp);
}
private AdvertiseRefsHookChain(AdvertiseRefsHook[] hooks, int count) {
this.hooks = hooks;
this.count = count;
}
}
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