PublishedSourcedEvent.java

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package com.eas.client.events;

import com.eas.script.AlreadyPublishedException;
import com.eas.script.HasPublished;
import com.eas.script.NoPublisherException;
import com.eas.script.ScriptFunction;
import com.eas.script.Scripts;
import jdk.nashorn.api.scripting.JSObject;

/**
 * The base event type.
 * @author vv
 */
public class PublishedSourcedEvent implements SourcedEvent {

    protected JSObject published;
    protected HasPublished source;

    public PublishedSourcedEvent(HasPublished aSource) {
        super();
        source = aSource;
    }

    @ScriptFunction(jsDoc = SOURCE_JS_DOC)
    @Override
    public HasPublished getSource() {
        return source;
    }

    @Override
    public JSObject getPublished() {
        if (published == null) {
            JSObject publisher = Scripts.getSpace().getPublisher(this.getClass().getName());
            if (publisher == null || !publisher.isFunction()) {
                throw new NoPublisherException();
            }
            published = (JSObject) publisher.call(null, new Object[]{this});
        }
        return published;
    }

    @Override
    public void setPublished(JSObject aValue) {
        if (published != null) {
            throw new AlreadyPublishedException();
        }
        published = aValue;
    }

}