Edit C:\Program Files\Java\jdk1.8.0_121\javafx\scene\media\Track.java
/* * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved. * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms. * * * * * * * * * * * * * * * * * * * * */ package javafx.scene.media; import java.util.Collections; import java.util.Locale; import java.util.Map; /** * A class representing a track contained in a media resource. * A media resource may have multiple parallel tracks, such as a video * track with several audio tracks in different languages. The types of tracks * supported by the system may be inferred from the existing subclasses of this * class. Not all media resources will contain a track of each supported type, * and the time span of a given track need not be commensurate with the time * span of the containing media. * @since JavaFX 2.0 */ public abstract class Track { /** * The name of the track or <code>null</code> if the track is unnamed. */ private String name; private long trackID; // opaque, unique track ID used by players to identify it private Locale locale; private Map<String,Object> metadata; /** * Retrieves the name of the track. * @return the track name or <code>null</code>. */ public final String getName() { return name; } /** * The {@link Locale} specifying the language and possibly the country that * the <code>Track</code> contents are formatted for. For {@link AudioTrack}s * this will be the language spoken, for {@link SubtitleTrack}s this will be * the language presented in the captions. Not all <code>Track</code>s will * have an associated language, in which case this method will return null. * * @return the <code>Track</code>s language information or null * @since JavaFX 8.0 */ public final Locale getLocale() { return locale; } /** * Get the track ID as defined by the media container format. The ID of each * <code>Track</code> must be unique for its source {@link Media}. * @return the <code>Track</code>s unique ID * @since JavaFX 8.0 */ public final long getTrackID() { return trackID; } /** * @return a Map containing all known metadata for this <code>Track</code> * @since JavaFX 8.0 */ public final Map<String,Object> getMetadata() { return metadata; } Track(long trackID, Map<String,Object> metadata) { this.trackID = trackID; Object value = metadata.get("name"); if (null != value && value instanceof String) { name = (String)value; } value = metadata.get("locale"); if (null != value && value instanceof Locale) { locale = (Locale)value; } this.metadata = Collections.unmodifiableMap(metadata); } private String description; @Override public final String toString() { synchronized(this) { if (null == description) { StringBuilder sb = new StringBuilder(); Map<String,Object> md = getMetadata(); sb.append(this.getClass().getName()); sb.append("[ track id = "); sb.append(trackID); for (Map.Entry<String,Object> entry : md.entrySet()) { Object value = entry.getValue(); if (null != value) { sb.append(", "); sb.append(entry.getKey()); sb.append(" = "); sb.append(value.toString()); } } sb.append("]"); description = sb.toString(); } } return description; } }
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