Media Session API: use MediaMetadata in the browser process.

content/public/android/java/src/org/chromium/content_public/common/MediaMetadata.java

Index: content/public/android/java/src/org/chromium/content_public/common/MediaMetadata.java
diff --git a/content/public/android/java/src/org/chromium/content_public/common/MediaMetadata.java b/content/public/android/java/src/org/chromium/content_public/common/MediaMetadata.java
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index 0000000000000000000000000000000000000000..fca2464e27e64037d1cf5c74a5eafd820b45ca6c
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+++ b/content/public/android/java/src/org/chromium/content_public/common/MediaMetadata.java
@@ -0,0 +1,111 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.content_public.common;
+
+import android.support.annotation.NonNull;
+import android.text.TextUtils;
+
+import org.chromium.base.annotations.CalledByNative;
+import org.chromium.base.annotations.JNINamespace;
+
+/**
+ * The MediaMetadata class carries information related to a media session. It is
+ * the Java counterpart of content::MediaMetadata.
+ */
+@JNINamespace("content")
+public class MediaMetadata {
+
+    @NonNull
+    private String mTitle;
+
+    @NonNull
+    private String mArtist;
+
+    @NonNull
+    private String mAlbum;
+
+    /**
+     * Returns the title associated with the media session.
+     */
+    public String getTitle() {
+        return mTitle;
+    }
+
+    /**
+     * Returns the artist name associated with the media session.
+     */
+    public String getArtist() {
+        return mArtist;
+    }
+
+    /**
+     * Returns the album name associated with the media session.
+     */
+    public String getAlbum() {
+        return mAlbum;
+    }
+
+    /**
+     * Sets the title associated with the media session.
+     * @param title The title to use for the media session.
+     */
+    public void setTitle(String title) {
+        mTitle = title;
+    }
+
+    /**
+     * Sets the arstist name associated with the media session.
+     * @param arstist The artist name to use for the media session.
+     */
+    public void setArtist(String artist) {
+        mArtist = artist;
+    }
+
+    /**
+     * Sets the album name associated with the media session.
+     * @param album The album name to use for the media session.
+     */
+    public void setAlbum(String album) {
+        mAlbum = album;
+    }
+
+    /**
+     * Creates a new MediaMetadata from the C++ code. This is exactly like the
+     * constructor below apart that it can be called by native code.
+     */
+    @CalledByNative
+    private static MediaMetadata create(String title, String artist, String album) {
+        return new MediaMetadata(title == null ? "" : title, artist == null ? "" : artist,
+            album == null ? "" : album);
+    }
+
+    /**
+     * Creates a new MediaMetadata.
+     */
+    public MediaMetadata(@NonNull String title, @NonNull String artist, @NonNull String album) {
+        mTitle = title;
+        mArtist = artist;
+        mAlbum = album;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (obj == this) return true;
+        if (!(obj instanceof MediaMetadata)) return false;
+
+        MediaMetadata other = (MediaMetadata) obj;
+        return TextUtils.equals(mTitle, other.mTitle)
+                && TextUtils.equals(mArtist, other.mArtist)
+                && TextUtils.equals(mAlbum, other.mAlbum);
+    }
+
+    @Override
+    public int hashCode() {
+        int result = mTitle.hashCode();
+        result = 31 * result + mArtist.hashCode();
+        result = 31 * result + mAlbum.hashCode();
+        return result;
+    }
+}