br.com.objectos.way.base.io.UrlSet 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.base.io;

import static com.google.common.collect.Lists.newArrayList;

import java.util.Iterator;
import java.util.List;

import br.com.objectos.core.io.Directory;

import com.google.common.base.Function;
import com.google.common.collect.FluentIterable;
import com.google.common.collect.ImmutableList;

/**
 * @author [email protected] (Marcio Endo)
 */
public class UrlSet implements Iterable {

  public static final Function TO_DATA_FILE = UrlSetToDataFile.INSTANCE;

  private final List items;

  UrlSet(List items) {
    this.items = ImmutableList.copyOf(items);
  }

  public static UrlSetBuilder builder() {
    return new UrlSetBuilderPojo();
  }

  public List get() {
    return FluentIterable.from(items)
        .transform(TO_DATA_FILE)
        .toList();
  }

  @Override
  public Iterator iterator() {
    return items.iterator();
  }

  public static interface UrlSetBuilder {

    interface UrlBuilder {
      DirectoryBuilder to(Directory directory);
    }

    interface DirectoryBuilder {
      UrlSetBuilder ext(String ext);
    }

    UrlSet build();

    UrlBuilder get(String url);

  }

  private static class UrlSetBuilderPojo
      implements
      UrlSetBuilder {

    private final List items = newArrayList();

    @Override
    public UrlSet build() {
      return new UrlSet(items);
    }

    @Override
    public UrlBuilder get(String url) {
      return new UrlBuilderPojo(this, url);
    }

    void add(UrlSetItem item) {
      items.add(item);
    }

  }

  private static class UrlBuilderPojo
      implements
      UrlSetBuilder.UrlBuilder,
      UrlSetBuilder.DirectoryBuilder {

    private final UrlSetBuilderPojo pojo;
    private final Url url;
    private Directory directory;

    public UrlBuilderPojo(UrlSetBuilderPojo pojo, String url) {
      this.pojo = pojo;
      this.url = Url.from(url);
    }

    @Override
    public UrlSetBuilder.DirectoryBuilder to(Directory directory) {
      this.directory = directory;
      return this;
    }

    @Override
    public UrlSetBuilder ext(String ext) {
      UrlSetItem item = new UrlSetItem(url, directory, ext);
      pojo.add(item);
      return pojo;
    }

  }

}