@MaybeNull
public static FileType getFileType(InputStream inputStream) throws IOException {
// create buffered stream for reuse
BufferedInputStream bis = new BufferedInputStream(inputStream);
bis.mark();
// read first two characters. if "PK", we have a compressed MusicXML file.
int bytes[] = new int[] {bis.read(), bis.read()};
if (bytes[0] == 80 && bytes[1] == 75) // P, K
{
return FileType.Compressed;
}
bis.reset();
bis.unmark();
// otherwise, try to parse as XML up to the root element (using StAX)
try {
XmlReader reader = platformUtils().createXmlReader(bis);
if (reader.openNextChildElement()) {
String n = reader.getElementName();
if (n.equals("score-partwise")) return FileType.XMLScorePartwise;
else if (n.equals("score-timewise")) return FileType.XMLScoreTimewise;
else if (n.equals("opus")) return FileType.XMLOpus;
reader.closeElement();
}
} catch (XmlException ex) {
// unknown (no XML)
return null;
}
// unknown
return null;
}
/** Reads a {@link ChordWidths} from the given {@link XmlReader} at the "chordwidths" element. */
public static ChordWidths readChordWidths(XmlReader r) throws IOException {
HashMap<String, Float> m = map();
while (r.openNextChildElement()) {
String n = r.getElementName();
String width = r.getAttribute("width");
if (width != null) {
m.put(n, Float.parseFloat(width));
}
r.closeElement();
}
return new ChordWidths(
v(m, "whole"),
v(m, "half"),
v(m, "quarter"),
v(m, "dotGap"),
v(m, "dot"),
v(m, "accToNoteGap"),
v(m, "accToAccGap"),
v(m, "doubleSharp"),
v(m, "sharp"),
v(m, "natural"),
v(m, "flat"),
v(m, "doubleFlat"));
}