org.openqa.selenium.grid.web.SpecificRoute Maven / Gradle / Ivy

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// Licensed to the Software Freedom Conservancy (SFC) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The SFC licenses this file
// to you 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.grid.web;

import org.openqa.selenium.injector.Injector;
import org.openqa.selenium.remote.http.HttpMethod;
import org.openqa.selenium.remote.http.HttpRequest;

import java.util.HashMap;
import java.util.Map;
import java.util.Objects;
import java.util.function.Function;

public class SpecificRoute extends Route {

  private final Map> mappers = new HashMap<>();
  private final HttpMethod method;
  private final UrlTemplate template;
  private Function handlerFunc;

  SpecificRoute(HttpMethod method, String template) {
    this.method = Objects.requireNonNull(method);
    this.template = new UrlTemplate(Objects.requireNonNull(template));
  }

  public  SpecificRoute map(String parameterName, Function mapper) {
    Objects.requireNonNull(parameterName);
    Objects.requireNonNull(mapper);

    mappers.put(parameterName, mapper);

    return this;
  }

  public SpecificRoute using(Class handlerClass) {
    Objects.requireNonNull(handlerClass);
    handlerFunc = (inj) -> inj.newInstance(handlerClass);
    return this;
  }

  public SpecificRoute using(CommandHandler handlerInstance) {
    Objects.requireNonNull(handlerInstance);
    handlerFunc = (inj) -> handlerInstance;
    return this;
  }


  @Override
  protected void validate() {
    if (handlerFunc == null) {
      throw new IllegalStateException("Handler for route is required");
    }
  }

  @Override
  protected CommandHandler newHandler(Injector injector, HttpRequest request) {
    if (request.getMethod() != method) {
      return getFallback(injector);
    }

    UrlTemplate.Match match = template.match(request.getUri());
    if (match == null) {
      return getFallback(injector);
    }

    if (!match.getParameters().isEmpty()) {
      Injector.Builder builder = Injector.builder().parent(injector);
      mappers.forEach((name, mapper) -> {
        String value = match.getParameters().get(name);
        if (value != null) {
          builder.register(mapper.apply(value));
        }
      });
      injector = builder.build();
    }

    return handlerFunc.apply(injector);
  }
}