package com.tesora.dve.sql.node;
/*
* #%L
* Tesora Inc.
* Database Virtualization Engine
* %%
* Copyright (C) 2011 - 2014 Tesora Inc.
* %%
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
* #L%
*/
import java.util.List;
public class SubEdge<O extends LanguageNode, T extends LanguageNode> extends SingleEdge<O,T> {
public SubEdge(Class<O> oc, O owner, OffsetEdgeName oen) {
super(oc, owner, oen);
}
@SuppressWarnings("rawtypes")
@Override
public LanguageNode apply(LanguageNode in) {
List<Edge<?,?>> edges = in.getEdges();
OffsetEdgeName myname = (OffsetEdgeName) this.getName();
for(Edge<?,?> e : edges) {
if (myname.baseMatches(e.getName())) {
// e is a multiedge, get the ith item
MultiEdge me = (MultiEdge) e;
if (myname.offset < me.size())
return me.get(myname.offset);
else
throw new MigrationException("Edge name " + e.getName() + " matches " + this.getName() + " but the collection is too small (" + me.size() + ")");
}
}
throw new MigrationException("No such edge name in " + in + ": " + this.getName());
}
}