DataSnapshot.java 文件源码

public boolean isNativeFormatAtailable(String nativeFormat) {
    if (nativeFormat == null) {
        return false;
    }
    if (nativeFormat.equals(FORMAT_TEXT)) {
        return (text != null);
    }
    if (nativeFormat.equals(FORMAT_FILE_LIST)) {
        return (fileList != null);
    }
    if (nativeFormat.equals(FORMAT_URL)) {
        return (url != null);
    }
    if (nativeFormat.equals(FORMAT_HTML)) {
        return (html != null);
    }
    if (nativeFormat.equals(FORMAT_IMAGE)) {
        return (rawBitmap != null);
    }
    try {
        DataFlavor df = SystemFlavorMap.decodeDataFlavor(nativeFormat);
        return serializedObjects.containsKey(df.getRepresentationClass());
    } catch (Exception e) {
        return false;
    }
}