/*
 * Copyright (C) 2020 Ericsson Software Technology AB. All rights reserved.
 *
 * 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 org.onap.aaf.certservice.cmpv2client.impl;

import java.util.ArrayList;
import java.util.List;
import java.util.function.BiConsumer;
import java.util.function.Consumer;
import java.util.function.Supplier;

/** Generic Builder Class for creating CMP Message. */
public class CmpMessageBuilder<T> {

  private final Supplier<T> instantiator;
  private final List<Consumer<T>> instanceModifiers = new ArrayList<>();

  public CmpMessageBuilder(Supplier<T> instantiator) {
    this.instantiator = instantiator;
  }

  public static <T> CmpMessageBuilder<T> of(Supplier<T> instantiator) {
    return new CmpMessageBuilder<>(instantiator);
  }

  public <U> CmpMessageBuilder<T> with(BiConsumer<T, U> consumer, U value) {
    Consumer<T> c = instance -> consumer.accept(instance, value);
    instanceModifiers.add(c);
    return this;
  }

  public T build() {
    T value = instantiator.get();
    instanceModifiers.forEach(modifier -> modifier.accept(value));
    instanceModifiers.clear();
    return value;
  }
}