code: // 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.json;
  
  import static org.openqa.selenium.json.Types.narrow;
  
  import java.lang.reflect.Method;
  import java.lang.reflect.Modifier;
  import java.lang.reflect.Type;
  import java.util.Arrays;
  import java.util.function.BiFunction;
  import java.util.stream.Stream;
  
  public class StaticInitializerCoercer extends TypeCoercer<Object> {
  
    private static final String FACTORY_METHOD_NAME = "fromJson";
  
    @Override
    public boolean test(Class<?> aClass) {
      return getMethods(aClass).count() == 1;
    }
  
    @Override
    public BiFunction<JsonInput, PropertySetting, Object> apply(Type type) {
      Class<?> aClass = narrow(type);
      // This is safe because we know the test above passed.
      Method fromJson = getMethods(aClass).findFirst().get();
      fromJson.setAccessible(true);
  
      return (jsonInput, setting) -> {
        Type argType = fromJson.getGenericParameterTypes()[0];
        Object obj;
        if (JsonInput.class.equals(argType)) {
          obj = jsonInput;
        } else {
          obj = jsonInput.read(argType);
        }
  
        if (obj == null) {
          throw new JsonException("Unable to read value to convert for " + type);
        }
  
        try {
          return fromJson.invoke(null, obj);
        } catch (ReflectiveOperationException e) {
          throw new JsonException("Unable to create instance of " + type, e);
        }
      };
    }
  
    private Stream<Method> getMethods(Class<?> aClass) {
      return Arrays.stream(aClass.getDeclaredMethods())
          .filter(method -> Modifier.isStatic(method.getModifiers()))
          .filter(method -> FACTORY_METHOD_NAME.equals(method.getName()))
          .filter(method -> method.getParameterCount() == 1);
    }
  }
  