// Copyright (C) 2012 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.sshd;
import com.google.common.base.Preconditions;
import com.google.common.collect.Maps;
import com.google.gerrit.extensions.annotations.Export;
import com.google.gerrit.server.plugins.InvalidPluginException;
import com.google.gerrit.server.plugins.ModuleGenerator;
import com.google.inject.AbstractModule;
import com.google.inject.Module;
import org.apache.sshd.server.Command;
import java.util.Map;
class SshAutoRegisterModuleGenerator
extends AbstractModule
implements ModuleGenerator {
private final Map<String, Class<Command>> commands = Maps.newHashMap();
private CommandName command;
@Override
protected void configure() {
bind(Commands.key(command))
.toProvider(new DispatchCommandProvider(command));
for (Map.Entry<String, Class<Command>> e : commands.entrySet()) {
bind(Commands.key(command, e.getKey())).to(e.getValue());
}
}
public void setPluginName(String name) {
command = Commands.named(name);
}
@SuppressWarnings("unchecked")
@Override
public void export(Export export, Class<?> type)
throws InvalidPluginException {
Preconditions.checkState(command != null, "pluginName must be provided");
if (Command.class.isAssignableFrom(type)) {
Class<Command> old = commands.get(export.value());
if (old != null) {
throw new InvalidPluginException(String.format(
"@Export(\"%s\") has duplicate bindings:\n %s\n %s",
export.value(), old.getName(), type.getName()));
}
commands.put(export.value(), (Class<Command>) type);
} else {
throw new InvalidPluginException(String.format(
"Class %s with @Export(\"%s\") must extend %s or implement %s",
type.getName(), export.value(),
SshCommand.class.getName(), Command.class.getName()));
}
}
@Override
public Module create() throws InvalidPluginException {
Preconditions.checkState(command != null, "pluginName must be provided");
return !commands.isEmpty() ? this : null;
}
}