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// Copyright (C) 2014 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.google.gerrit.server.plugins;
import com.google.gerrit.extensions.registration.DynamicSet;
import com.google.inject.Inject;
import com.google.inject.Singleton;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.jgit.internal.storage.file.FileSnapshot;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@Singleton
class UniversalServerPluginProvider implements ServerPluginProvider {
private static final Logger log = LoggerFactory.getLogger(UniversalServerPluginProvider.class);
private final DynamicSet<ServerPluginProvider> serverPluginProviders;
@Inject
UniversalServerPluginProvider(DynamicSet<ServerPluginProvider> sf) {
this.serverPluginProviders = sf;
}
@Override
public ServerPlugin get(Path srcPath, FileSnapshot snapshot, PluginDescription pluginDescription)
throws InvalidPluginException {
return providerOf(srcPath).get(srcPath, snapshot, pluginDescription);
}
@Override
public String getPluginName(Path srcPath) {
return providerOf(srcPath).getPluginName(srcPath);
}
@Override
public boolean handles(Path srcPath) {
List<ServerPluginProvider> providers = providersForHandlingPlugin(srcPath);
switch (providers.size()) {
case 1:
return true;
case 0:
return false;
default:
throw new MultipleProvidersForPluginException(srcPath, providers);
}
}
@Override
public String getProviderPluginName() {
return "gerrit";
}
private ServerPluginProvider providerOf(Path srcPath) {
List<ServerPluginProvider> providers = providersForHandlingPlugin(srcPath);
switch (providers.size()) {
case 1:
return providers.get(0);
case 0:
throw new IllegalArgumentException(
"No ServerPluginProvider found/loaded to handle plugin file "
+ srcPath.toAbsolutePath());
default:
throw new MultipleProvidersForPluginException(srcPath, providers);
}
}
private List<ServerPluginProvider> providersForHandlingPlugin(Path srcPath) {
List<ServerPluginProvider> providers = new ArrayList<>();
for (ServerPluginProvider serverPluginProvider : serverPluginProviders) {
boolean handles = serverPluginProvider.handles(srcPath);
log.debug(
"File {} handled by {} ? => {}",
srcPath,
serverPluginProvider.getProviderPluginName(),
handles);
if (handles) {
providers.add(serverPluginProvider);
}
}
return providers;
}
}
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