JsEvaluateContextBase.java example

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nodeclipse-1-master
// Copyright (c) 2010 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.Map;

import org.chromium.sdk.CallbackSemaphore;
import org.chromium.sdk.JsEvaluateContext;
import org.chromium.sdk.RelayOk;
import org.chromium.sdk.SyncCallback;
import org.chromium.sdk.util.MethodIsBlockingException;

/**
 * Partial implementation of {@link JsEvaluateContext} that reduce all functionality
 * to single abstract method.
 */
public abstract class JsEvaluateContextBase implements JsEvaluateContext {
  @Override
  public void evaluateSync(String expression, Map<String, String> additionalContext,
      EvaluateCallback evaluateCallback)
      throws MethodIsBlockingException {
    CallbackSemaphore callbackSemaphore = new CallbackSemaphore();
    RelayOk relayOk =
        evaluateAsync(expression, additionalContext, evaluateCallback, callbackSemaphore);
    boolean res = callbackSemaphore.tryAcquireDefault(relayOk);
    if (!res) {
      evaluateCallback.failure("Timeout");
    }
  }

  @Override
  public abstract RelayOk evaluateAsync(String expression, Map<String, String> additionalContext,
      EvaluateCallback callback, SyncCallback syncCallback);
}