ListVersionsCommand.java

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package edu.harvard.iq.dataverse.engine.command.impl;

import edu.harvard.iq.dataverse.Dataset;
import edu.harvard.iq.dataverse.DatasetVersion;
import edu.harvard.iq.dataverse.authorization.Permission;
import edu.harvard.iq.dataverse.engine.command.AbstractCommand;
import edu.harvard.iq.dataverse.engine.command.CommandContext;
import edu.harvard.iq.dataverse.engine.command.DataverseRequest;
import edu.harvard.iq.dataverse.engine.command.RequiredPermissions;
import edu.harvard.iq.dataverse.engine.command.exception.CommandException;
import java.util.LinkedList;
import java.util.List;

/**
 *
 * @author Naomi
 */
// No permission needed to view published dvObjects
@RequiredPermissions({})
public class ListVersionsCommand extends AbstractCommand<List<DatasetVersion>>{
    
    private final Dataset ds;
    
	public ListVersionsCommand(DataverseRequest aRequest, Dataset aDataset) {
		super(aRequest, aDataset);
		ds = aDataset;
	}

	@Override
	public List<DatasetVersion> execute(CommandContext ctxt) throws CommandException {
		List<DatasetVersion> outputList = new LinkedList<>();
		for ( DatasetVersion dsv : ds.getVersions() ) {
            if (dsv.isReleased() || ctxt.permissions().request( getRequest() ).on(ds).has(Permission.EditDataset)) {
                outputList.add(dsv);
            }
		}
        return outputList;
	}
}