ratpack.registry.internal.MultiEntryRegistry Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of ratpack-core Show documentation

null

There is a newer version: 2.0.0-rc-1

/*
 * Copyright 2013 the original author or authors.
 *
 * 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 ratpack.registry.internal;

import com.google.common.collect.ImmutableList;
import ratpack.registry.NotInRegistryException;
import ratpack.registry.Registry;

import java.util.List;

public class MultiEntryRegistry implements Registry {

  private final List> entries;

  public MultiEntryRegistry(List> entries) {
    this.entries = entries;
  }

  @Override
  public String toString() {
    return "Registry{" + entries + '}';
  }

  @Override
  public  O get(Class type) throws NotInRegistryException {
    O object = maybeGet(type);
    if (object == null) {
      throw new NotInRegistryException(type);
    } else {
      return object;
    }
  }

  public  O maybeGet(Class type) {
    for (RegistryEntry entry : entries) {
      if (type.isAssignableFrom(entry.getType())) {
        return type.cast(entry.get());
      }
    }

    return null;
  }

  public  List getAll(Class type) {
    ImmutableList.Builder builder = ImmutableList.builder();
    for (RegistryEntry entry : entries) {
      if (type.isAssignableFrom(entry.getType())) {
        builder.add(type.cast(entry.get()));
      }
    }
    return builder.build();
  }

  @Override
  public boolean equals(Object o) {
    if (this == o) {
      return true;
    }
    if (o == null || getClass() != o.getClass()) {
      return false;
    }

    MultiEntryRegistry that = (MultiEntryRegistry) o;

    return entries.equals(that.entries);
  }

  @Override
  public int hashCode() {
    return entries.hashCode();
  }
}