/**
* Copyright 2010 CosmoCode GmbH
*
* 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 de.cosmocode.palava.ipc.session;
import java.util.Map;
import com.google.common.base.Functions;
import com.google.common.collect.Maps;
import com.google.common.collect.Ordering;
import com.google.inject.Singleton;
import de.cosmocode.palava.ipc.IpcArguments;
import de.cosmocode.palava.ipc.IpcCall;
import de.cosmocode.palava.ipc.IpcCommand;
import de.cosmocode.palava.ipc.IpcCommandExecutionException;
import de.cosmocode.palava.ipc.IpcSession;
/**
* See below.
*
* @since 1.3
* @author Willi Schoenborn
* @author Tobias Sarnowski
*/
@IpcCommand.Description("Retrieves all entries of the session")
@IpcCommand.Params({
@IpcCommand.Param(name = Naming.SORT, description = "Specifies whether entries should be sorted",
type = "boolean", optional = true, defaultValue = "false"),
@IpcCommand.Param(name = Naming.NAMESPACE, description = "The global namespace keys (null disables)",
type = "string", optional = true)
})
@IpcCommand.Return(name = Naming.ENTRIES, description = "All entries")
@Singleton
final class Entries implements IpcCommand {
private final Ordering<Object> ordering = Ordering.natural().onResultOf(Functions.toStringFunction());
@Override
public void execute(IpcCall call, Map<String, Object> result) throws IpcCommandExecutionException {
final IpcArguments arguments = call.getArguments();
final boolean sort = arguments.getBoolean(Naming.SORT, false);
final String namespace = arguments.getString(Naming.NAMESPACE, null);
final IpcSession session = call.getConnection().getSession();
final Map<Object, Object> entries = sort ? Maps.newTreeMap(ordering) : Maps.newHashMap();
if (namespace == null) {
entries.putAll(session);
} else if (session.containsKey(namespace)) {
@SuppressWarnings("unchecked")
final Map<Object, Object> namespaced = (Map<Object, Object>) session.get(namespace);
entries.putAll(namespaced);
}
result.put(Naming.ENTRIES, entries);
}
}