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/*
Copyright 2007-2011 WebDriver committers
Copyright 2007-2011 Google Inc.

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 org.openqa.selenium.remote.server.handler;

import org.openqa.selenium.remote.Response;
import org.openqa.selenium.remote.SessionId;
import org.openqa.selenium.remote.server.DriverSessions;
import org.openqa.selenium.remote.server.rest.Handler;
import org.openqa.selenium.remote.server.rest.ResultType;

import com.google.common.base.Function;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Iterables;

import java.util.Map;
import java.util.Set;

public class GetAllSessions implements Handler {

  private final Response response = new Response();
  private volatile DriverSessions allSessions;

  public GetAllSessions(DriverSessions allSession) {
    this.allSessions = allSession;
  }

  public ResultType handle() throws Exception {
    Set sessions = allSessions.getSessions();
    Iterable sessionInfo = Iterables.transform(sessions, toSessionInfo());
    response.setValue(ImmutableList.copyOf(sessionInfo));
    return ResultType.SUCCESS;
  }

  public Response getResponse() {
    return response;
  }

  private Function toSessionInfo() {
    return new Function() {
      public SessionInfo apply(SessionId id) {
        Map capabilities = allSessions.get(id).getCapabilities().asMap();
        return new SessionInfo(id, capabilities);
      }
    };
  }

  private static class SessionInfo {

    private final SessionId id;
    private final Map capabilities;

    public SessionInfo(SessionId id, Map capabilities) {
      this.id = id;
      this.capabilities = capabilities;
    }

    public String getId() {
      return id.toString();
    }

    public Map getCapabilities() {
      return capabilities;
    }
  }
}