/*
 * Copyright (c) 2011 Google, Inc.
 *
 * 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.google.common.truth;

import com.google.common.annotations.GwtIncompatible;

/**
 * A custom subject factory which will return a FooSubject (which
 * is a Subject<Foo>).
 *
 * @author Christian Gruber (cgruber@israfil.net)
 */
public abstract class SubjectFactory<S extends Subject<S,T>, T> {

  @GwtIncompatible("reflection")
  private static final int SUBJECT_TYPE_PARAMETER = 0;

  @GwtIncompatible("reflection")
  private final Class<S> type =
      (Class<S>)ReflectionUtil.typeParameter(getClass(), SUBJECT_TYPE_PARAMETER);

  public abstract S getSubject(FailureStrategy fs, T that);

  @GwtIncompatible("reflection")
  public Class<S> getSubjectClass() {
    return type;
  }

}

