br.com.objectos.way.code.MethodInfoMap Maven / Gradle / Ivy

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/*
 * Copyright 2014 Objectos, Fábrica de 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.way.code;

import java.util.List;
import java.util.Map;
import java.util.stream.Stream;

import br.com.objectos.way.core.lang.Lazy;
import br.com.objectos.way.core.testing.Testable;
import br.com.objectos.way.core.testing.Testables;
import br.com.objectos.way.core.util.WayMap;

import com.google.common.base.Optional;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Maps;

/**
 * @author [email protected] (Marcio Endo)
 */
public class MethodInfoMap implements Testable, WayMap {

  private static final MethodInfoMap EMPTY_MAP = new MethodInfoMap(ImmutableList. of());

  private final List list;

  private final Lazy> nameMap = new LazyNameMap();

  private MethodInfoMap(List list) {
    this.list = list;
  }

  public static MethodInfoMap mapOf() {
    return EMPTY_MAP;
  }

  public static MethodInfoMap mapOf(List list) {
    return new MethodInfoMap(list);
  }

  @Override
  public boolean isEqual(MethodInfoMap that) {
    return Testables.isEqualHelper()
        .equal(list, that.list)
        .result();
  }

  @Override
  public List list() {
    return list;
  }

  public Optional named(String name) {
    MethodInfo maybeMethodInfo = nameMap.get().get(name);
    return Optional.fromNullable(maybeMethodInfo);
  }

  public Stream stream() {
    return list.stream();
  }

  private class LazyNameMap extends Lazy> {
    @Override
    protected Map compute() {
      return Maps.uniqueIndex(list, MethodInfoName.get());
    }
  }

}