// Copyright (c) 2009 The Chromium Authors. All rights reserved.

// Use of this source code is governed by a BSD-style license that can be

// found in the LICENSE file.

package org.chromium.sdk.internal;

import java.util.List;

import java.util.concurrent.ConcurrentHashMap;

import java.util.concurrent.ConcurrentMap;

import org.chromium.sdk.internal.protocol.data.SomeHandle;

import org.chromium.sdk.internal.protocolparser.JsonProtocolParseException;

import org.chromium.sdk.internal.tools.v8.V8ProtocolUtil;

import org.json.simple.JSONObject;

/**

 * A facility for storage and retrieval of handle objects using their "ref" IDs.

 */

public class HandleManager {

  private final ConcurrentMap<Long, SomeHandle> refToHandle =

      new ConcurrentHashMap<Long, SomeHandle>();

  public void putAll(List<SomeHandle> list) {

    for (SomeHandle handle : list) {

      put(handle.handle(), handle);

    }

  }

  SomeHandle put(Long ref, JSONObject object) {

    SomeHandle smthWithHandle;

    try {

      smthWithHandle = V8ProtocolUtil.getV8Parser().parse(object, SomeHandle.class);

    } catch (JsonProtocolParseException e) {

      throw new RuntimeException(e);

    }

    put(ref, smthWithHandle);

    return smthWithHandle;

  }

  private void put(Long ref, SomeHandle smthWithHandle) {

    SomeHandle oldObject = refToHandle.putIfAbsent(ref, smthWithHandle);

    if (oldObject != null) {

      mergeValues(oldObject, smthWithHandle);

    }

  }

  void put(SomeHandle someHandle) {

    if (someHandle.handle() >= 0) {

      put(someHandle.handle(), someHandle);

    }

  }

  public SomeHandle getHandle(Long ref) {

    return refToHandle.get(ref);

  }

  private static void mergeValues(SomeHandle oldObject, SomeHandle newObject) {

  }

}