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/*
 * Copyright (C) 2014-2020 Objectos Software LTDA.
 *
 * 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 br.com.objectos.code.testing.model;

import static br.com.objectos.comuns.collections.Factory.asStreamIterable;
import static br.com.objectos.comuns.lang.Preconditions.checkNotNull;

import br.com.objectos.comuns.collections.StreamIterable;
import br.com.objectos.comuns.collections.StreamIterator;
import java.util.List;
import java.util.Optional;
import javax.lang.model.element.ExecutableElement;
import javax.lang.model.element.Modifier;

class ExecutableElementQueryImpl implements ConstructorQuery, MethodQuery {

  private final ModelTesting testing;
  private final StreamIterable elementList;

  ExecutableElementQueryImpl(ModelTesting testing, List list) {
    this(testing, asStreamIterable(list));
  }

  ExecutableElementQueryImpl(ModelTesting testing, StreamIterable elementList) {
    this.testing = testing;
    this.elementList = elementList;
  }

  @Override
  public final Optional first() {
    return getFirst(elementList);
  }

  @Override
  public final Optional firstNamed(String name) {
    return getFirst(elementList.filter(e -> e.getSimpleName().contentEquals(name)));
  }

  @Override
  public final ConstructorQuery hasModifier(Modifier modifier) {
    checkNotNull(modifier, "modifier == null");
    return new ExecutableElementQueryImpl(
        testing,
        elementList.filter(e -> e.getModifiers().contains(modifier)));
  }
  
  private Optional getFirst(StreamIterable si) {
    StreamIterator i = si.iterator();
    return i.hasNext() ? Optional.of(i.next()) : Optional.empty();
  }

}