playwright-java/playwright/src/main/java/com/microsoft/playwright/impl/BindingCall.java

/**
 * Copyright (c) Microsoft Corporation.
 *
 * 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.microsoft.playwright.impl;

import com.google.gson.Gson;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.microsoft.playwright.BrowserContext;
import com.microsoft.playwright.Frame;
import com.microsoft.playwright.JSHandle;
import com.microsoft.playwright.Page;

import java.util.ArrayList;
import java.util.List;

import static com.microsoft.playwright.impl.Serialization.*;

class BindingCall extends ChannelOwner {
  private static class SourceImpl implements Page.Binding.Source {
    private final Frame frame;

    public SourceImpl(Frame frame) {
      this.frame = frame;
    }

    @Override
    public BrowserContext context() {
      return page().context();
    }

    @Override
    public Page page() {
      return frame.page();
    }

    @Override
    public Frame frame() {
      return frame;
    }
  }

  BindingCall(ChannelOwner parent, String type, String guid, JsonObject initializer) {
    super(parent, type, guid, initializer);
  }

  String name() {
    return initializer.get("name").getAsString();
  }

  void call(Page.Binding binding) {
    try {
      Frame frame = connection.getExistingObject(initializer.getAsJsonObject("frame").get("guid").getAsString());
      Page.Binding.Source source = new SourceImpl(frame);
      List<Object> args = new ArrayList<>();
      if (initializer.has("handle")) {
        JSHandle handle = connection.getExistingObject(initializer.getAsJsonObject("handle").get("guid").getAsString());
        args.add(handle);
      } else {
        for (JsonElement arg : initializer.getAsJsonArray("args")) {
          args.add(deserialize(new Gson().fromJson(arg, SerializedValue.class)));
        }
      }
      Object result = binding.call(source, args.toArray());

      JsonObject params = new JsonObject();
      params.add("result", new Gson().toJsonTree(serializeArgument(result)));
      sendMessage("resolve", params);
    } catch (RuntimeException exception) {
      JsonObject params = new JsonObject();
      params.add("error", new Gson().toJsonTree(serializeError(exception)));
      sendMessage("reject", params);
    }
  }
}