OperatorPlayer.java

package org.reldb.dbrowser.ui.content.rel.operator;

import org.eclipse.swt.graphics.Image;
import org.reldb.dbrowser.ui.content.rel.DbTreeAction;
import org.reldb.dbrowser.ui.content.rel.DbTreeItem;
import org.reldb.dbrowser.ui.content.rel.NaiveShowTab;
import org.reldb.dbrowser.ui.content.rel.RelPanel;
import org.reldb.rel.client.Tuple;
import org.reldb.rel.client.Tuples;

public class OperatorPlayer extends DbTreeAction {

	public OperatorPlayer(RelPanel relPanel) {
		super(relPanel);
	}

	@Override
	public void go(DbTreeItem item, Image image) {
		String query =
				"(UNION {" +
				"	(sys.Operators UNGROUP Implementations) {Signature, Definition}," +
				"	sys.OperatorsBuiltin {Signature, Definition}" +
				"}" +
				"WHERE Signature='" + item.getName() + "')" +
				"{Definition}";
		Tuples tuples = relPanel.getConnection().getTuples(query);
		String definition = "???";
		if (tuples != null)
			for (Tuple tuple: tuples)
				definition = tuple.getAttributeValue("Definition").toString();
		if (definition.trim().length() == 0)
			definition = "<System-generated definition is unavailable.>";
		NaiveShowTab typetab = new NaiveShowTab(relPanel, item, definition);
		typetab.setImage(image);
		relPanel.getTabFolder().setSelection(typetab);
	}

}