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Commit 6e1d2307 authored by Ajay Panicker's avatar Ajay Panicker
Browse files

Add MediaMetadata equals to make metadata comparisons easier 

Bug: 68854188
Test: Compare two metadata objects with the same title, album, and
artist
Change-Id: I89d1944bf237f8f3f1c52ccdb8ff385422b19070
parent a89f6150

media/java/android/media/MediaMetadata.java

+66 −0
Original line number Diff line number Diff line
@@ -34,6 +34,7 @@ import android.util.SparseArray; 
import java.lang.annotation.Retention;

import java.lang.annotation.RetentionPolicy;

import java.util.Set;

import java.util.Objects;



/**

 * Contains metadata about an item, such as the title, artist, etc.
@@ -615,6 +616,71 @@ public final class MediaMetadata implements Parcelable { 
                }

            };



    /**

     * Compares the contents of this object to another MediaMetadata object. It

     * does not compare Bitmaps and Ratings as the media player can choose to

     * forgo these fields depending on how you retrieve the MediaMetadata.

     *

     * @param o The Metadata object to compare this object against

     * @return Whether or not the two objects have matching fields (excluding

     * Bitmaps and Ratings)

     */

    @Override

    public boolean equals(Object o) {

        if (o == this) {

            return true;

        }



        if (!(o instanceof MediaMetadata)) {

            return false;

        }



        final MediaMetadata m = (MediaMetadata) o;



        for (int i = 0; i < METADATA_KEYS_TYPE.size(); i++) {

            String key = METADATA_KEYS_TYPE.keyAt(i);

            switch (METADATA_KEYS_TYPE.valueAt(i)) {

                case METADATA_TYPE_TEXT:

                    if (!Objects.equals(getString(key), m.getString(key))) {

                        return false;

                    }

                    break;

                case METADATA_TYPE_LONG:

                    if (getLong(key) != m.getLong(key)) {

                        return false;

                    }

                    break;

                default:

                    // Ignore ratings and bitmaps when comparing

                    break;

            }

        }



        return true;

    }



    @Override

    public int hashCode() {

        int hashCode = 17;



        for (int i = 0; i < METADATA_KEYS_TYPE.size(); i++) {

            String key = METADATA_KEYS_TYPE.keyAt(i);

            switch (METADATA_KEYS_TYPE.valueAt(i)) {

                case METADATA_TYPE_TEXT:

                    hashCode = 31 * hashCode + Objects.hash(getString(key));

                    break;

                case METADATA_TYPE_LONG:

                    hashCode = 31 * hashCode + Long.hashCode(getLong(key));

                    break;

                default:

                    // Ignore ratings and bitmaps when comparing

                    break;

            }

        }



        return hashCode;

    }



    /**

     * Use to build MediaMetadata objects. The system defined metadata keys must

     * use the appropriate data type.