MusicXmlScoreDocFileReader.java

package com.xenoage.zong.io.musicxml.in;

import com.xenoage.utils.async.AsyncResult;
import com.xenoage.utils.filter.AllFilter;
import com.xenoage.utils.io.InputStream;
import com.xenoage.utils.promise.Promise;
import com.xenoage.zong.core.Score;
import com.xenoage.zong.documents.ScoreDoc;
import com.xenoage.zong.io.ScoreDocFactory;
import com.xenoage.zong.musicxml.types.MxlScorePartwise;
import lombok.RequiredArgsConstructor;

import java.util.List;

/**
 * Creates a {@link ScoreDoc} instance from the document
 * at the given path.
 * 
 * The filepath must be given, when the opened file is an opus document,
 * otherwise null is returned.
 * 
 * If no score is opened, null is returned.
 */
@RequiredArgsConstructor
public class MusicXmlScoreDocFileReader {

	private final InputStream stream;
	private final String filePath;

	
	public Promise<ScoreDoc> read() {

		return new Promise<>(ret -> {

			MusicXmlFileReader reader = new MusicXmlFileReader(stream, filePath, new AllFilter<>());
			reader.produce(new AsyncResult<List<Score>>() {

				@Override public void onSuccess(List<Score> scores) {
					if (scores.size() == 0) {
						//no score was opened
						ret.resolve(null);
					}
					else {
						//open first selected score
						Score score = scores.get(0);
						ScoreDoc scoreDoc;
						try {
							scoreDoc = new ScoreDocFactory().read(score);

							//add credit elements - TIDY
							Object o = score.getMetaData().get("mxldoc");
							if (o != null && o instanceof MxlScorePartwise) {
								MxlScorePartwise doc = (MxlScorePartwise) o;
								CreditsReader.read(doc, scoreDoc.getLayout(), score.getFormat());
							}

							ret.resolve(scoreDoc);
						} catch (Exception ex) {
							ret.reject(ex);
						}
					}
				}

				@Override public void onFailure(Exception ex) {
					ret.reject(ex);
				}
			});
		});
	}
	
}