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Make MimeType top level check related methods more robust

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Throwing an IllegalArgumentException doesn't help the method signature.

PiperOrigin-RevId: 234579722
This commit is contained in:
aquilescanta 2019-02-19 12:43:52 +00:00 committed by Oliver Woodman
parent 8e7ae9201a
commit 774c01d020
1 changed files with 7 additions and 29 deletions
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36
library/core/src/main/java/com/google/android/exoplayer2/util/MimeTypes.java
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@ -120,42 +120,22 @@ public final class MimeTypes {
customMimeTypes.add(customMimeType);
}
/**
* Whether the top-level type of {@code mimeType} is audio.
*
* @param mimeType The mimeType to test.
* @return Whether the top level type is audio.
*/
/** Returns whether the given string is an audio mime type. */
public static boolean isAudio(@Nullable String mimeType) {
return BASE_TYPE_AUDIO.equals(getTopLevelType(mimeType));
}
/**
* Whether the top-level type of {@code mimeType} is video.
*
* @param mimeType The mimeType to test.
* @return Whether the top level type is video.
*/
/** Returns whether the given string is a video mime type. */
public static boolean isVideo(@Nullable String mimeType) {
return BASE_TYPE_VIDEO.equals(getTopLevelType(mimeType));
}
/**
* Whether the top-level type of {@code mimeType} is text.
*
* @param mimeType The mimeType to test.
* @return Whether the top level type is text.
*/
/** Returns whether the given string is a text mime type. */
public static boolean isText(@Nullable String mimeType) {
return BASE_TYPE_TEXT.equals(getTopLevelType(mimeType));
}
/**
* Whether the top-level type of {@code mimeType} is application.
*
* @param mimeType The mimeType to test.
* @return Whether the top level type is application.
*/
/** Returns whether the given string is an application mime type. */
public static boolean isApplication(@Nullable String mimeType) {
return BASE_TYPE_APPLICATION.equals(getTopLevelType(mimeType));
}
@ -384,10 +364,8 @@ public final class MimeTypes {
}
/**
* Returns the top-level type of {@code mimeType}.
*
* @param mimeType The mimeType whose top-level type is required.
* @return The top-level type, or null if the mimeType is null.
* Returns the top-level type of {@code mimeType}, or null if {@code mimeType} is null or does not
* contain a forward slash character ({@code '/'}).
*/
private static @Nullable String getTopLevelType(@Nullable String mimeType) {
if (mimeType == null) {
@ -395,7 +373,7 @@ public final class MimeTypes {
}
int indexOfSlash = mimeType.indexOf('/');
if (indexOfSlash == -1) {
throw new IllegalArgumentException("Invalid mime type: " + mimeType);
return null;
}
return mimeType.substring(0, indexOfSlash);
}