Android Open Source - android-music-player Track

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Back to project page android-music-player.

License

The source code is released under:

GNU General Public License

Java Source Code

package pconley.vamp.model;
//from   w  w w . j  av  a2  s  .  c o m
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;

/**
 * A piece of music, and its metadata.
 */
public class Track {

  private long id;
  private String uri;
  private Map<String, Set<Tag>> tags;

  /* Private constructor. Use the builder. */
  private Track(long id, String uri, Map<String, Set<Tag>> tags) {
    this.id = id;
    this.uri = uri;
    this.tags = tags;
  }

  public long getId() {
    return id;
  }

  public String getUri() {
    return uri;
  }

  /**
   * @return The names of tags used by this track.
   */
  public Set<String> getTagNames() {
    return Collections.unmodifiableSet(tags.keySet());
  }

  /**
   * @param name
   *            The name of a tag
   * @return The tags corresponding to this tag name, or null if the tag isn't
   *         in the this track. The values' ordering is in no way guaranteed.
   */
  public Set<Tag> getTags(String name) {
    // Check if the key exists, as unmodifiableSet doesn't accept null input
    if (!tags.containsKey(name)) {
      return null;
    }

    return Collections.unmodifiableSet(tags.get(name));
  }

  public String tagsToString() {
    StringBuilder sb = new StringBuilder();

    List<String> tagNames = new LinkedList<String>(tags.keySet());
    Collections.sort(tagNames);

    for (String name : tagNames) {
      sb.append("\t").append(name).append(":\n");

      for (Tag tag : tags.get(name)) {
        sb.append("\t\t").append(tag.getValue()).append("\n");
      }
    }

    return sb.toString();
  }

  @Override
  public String toString() {
    StringBuilder sb = new StringBuilder();
    sb.append(uri).append("\n").append(tagsToString());

    return sb.toString();
  }

  @Override
  public int hashCode() {
    final int prime = 31;
    int result = 1;
    result = prime * result + ((tags == null) ? 0 : tags.hashCode());
    result = prime * result + ((uri == null) ? 0 : uri.hashCode());
    return result;
  }

  @Override
  public boolean equals(Object obj) {
    if (this == obj)
      return true;
    if (obj == null)
      return false;
    if (getClass() != obj.getClass())
      return false;
    Track other = (Track) obj;
    if (tags == null) {
      if (other.tags != null)
        return false;
    } else if (!tags.equals(other.tags))
      return false;
    if (uri == null) {
      if (other.uri != null)
        return false;
    } else if (!uri.equals(other.uri))
      return false;
    return true;
  }

  /**
   * Builder class for a track. Gives a simple means of adding tags from a
   * Cursor without making the track mutable.
   */
  public static class Builder {

    private long id;
    private String uri;
    private Map<String, Set<Tag>> tags;

    public Builder(long id, String uri) {
      this.id = id;
      this.uri = uri;

      tags = new HashMap<String, Set<Tag>>();
    }

    public void add(Tag tag) {
      String name = tag.getName();

      if (!tags.containsKey(name)) {
        tags.put(name, new HashSet<Tag>());
      }

      tags.get(name).add(tag);
    }

    public Track build() {
      return new Track(id, uri, tags);
    }
  }
}

Java Source Code List

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