DownloadEvent.java

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package org.dlect.controller.download.event;

import javax.annotation.Nonnull;
import org.dlect.events.Event;

import static org.dlect.helper.Conditions.*;

/**
 *
 * @author lee
 */
public class DownloadEvent extends Event {

    private final DownloadParameter parameter;
    private final DownloadState before;
    private final DownloadState after;
    private final DownloadStatus eventID;

    public DownloadEvent(@Nonnull Object source, @Nonnull DownloadStatus state, @Nonnull DownloadParameter downloadParam, DownloadState before, DownloadState after) {
        super(source, state, before, after);
        checkNonNull(state, "Download State");
        checkNonNull(downloadParam, "Download Parameters");
        // TODO(Later) update the download event firing so that the before & afters are correctly nulled.
//        switch (state) {
//            case COMPLETED:
//            case FAILED:
//                checkNonNull(before, "Before");
//                checkNull(after, "After");
//                break;
//            case PROGRESS:
//                checkNonNull(before, "Before");
//                checkNonNull(after, "After");
//                break;
//            case STARTING:
//                checkNull(before, "Before");
//                checkNonNull(after, "After");
//                break;
//            default:
//                throw new AssertionError();
//        }
        this.parameter = downloadParam;
        this.before = before;
        this.after = after;
        this.eventID = state;
    }

    @Override
    public DownloadState getAfter() {
        return after;
    }

    @Nonnull
    public DownloadParameter getParameter() {
        return parameter;
    }

    @Override
    public DownloadState getBefore() {
        return before;
    }

    @Override
    public DownloadStatus getEventID() {
        return eventID;
    }

}