/**
Copyright (C) SYSTAP, LLC DBA Blazegraph 2006-2016. All rights reserved.
Contact:
SYSTAP, LLC DBA Blazegraph
2501 Calvert ST NW #106
Washington, DC 20008
licenses@blazegraph.com
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* Created on Mar 10, 2012
*/
package com.bigdata.rdf.sparql.ast;
import java.util.Iterator;
import java.util.Map;
import com.bigdata.bop.BOp;
import com.bigdata.bop.BOpUtility;
import com.bigdata.rdf.spo.ISPO;
/**
* Recursive container for ground {@link StatementPatternNode}s. This is used
* for {@link InsertData} and {@link DeleteData}. It gets flattened out and
* turned into an {@link ISPO}[].
*
* @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a>
* @version $Id$
*/
public class QuadData extends AbstractStatementContainer<IStatementContainer>
implements IStatementContainer {
/**
*
*/
private static final long serialVersionUID = 1L;
public QuadData() {
}
/**
* @param op
*/
public QuadData(final QuadData op) {
super(op);
}
/**
* @param args
* @param anns
*/
public QuadData(final BOp[] args, final Map<String, Object> anns) {
super(args, anns);
}
public QuadData(final IStatementContainer child) {
this(new BOp[]{(BOp) child}, null);
}
/**
* Flatten the {@link QuadData} into a simple {@link ConstructNode}. The
* {@link ConstructNode} MAY use variables as well as constants and supports
* the context position, so this is really a quads construct template.
*
* @param template
* The {@link ConstructNode} for the template.
*
* @return The argument.
*
* TODO Maybe we could just flatten this in UpdateExprBuilder?
*/
public ConstructNode flatten(final ConstructNode template) {
final QuadData quadData = this;
final Iterator<StatementPatternNode> itr = BOpUtility.visitAll(
quadData, StatementPatternNode.class);
while (itr.hasNext()) {
final StatementPatternNode sp = (StatementPatternNode) (itr.next()
.clone());
template.addChild(sp);
}
return template;
}
/**
* Flatten the {@link StatementPatternNode}s into the caller's
* {@link JoinGroupNode}.
*
* @param container
* The caller's container.
*
* @return The caller's container.
*/
public JoinGroupNode flatten(final JoinGroupNode container) {
final QuadData quadData = this;
final Iterator<StatementPatternNode> itr = BOpUtility.visitAll(
quadData, StatementPatternNode.class);
while (itr.hasNext()) {
final StatementPatternNode sp = (StatementPatternNode) (itr.next()
.clone());
// if (sp.getScope() == Scope.NAMED_CONTEXTS) {
//
// /*
// * Statement pattern must be in a GRAPH group.
// *
// * TODO We should coalesce statement patterns which are observed
// * to be in the same graph group (same constant or the same
// * variable). Note that the lexical scope is not an issue for
// * the QuadsData - there are no nested sub-groups or
// * sub-selects.
// */
//
// container.addChild(new JoinGroupNode(sp.getContext(), sp));
//
// } else {
//
// container.addChild(sp);
//
// }
container.addChild(sp);
}
return container;
}
@Override
public String toString(final int indent) {
final StringBuilder sb = new StringBuilder();
final String s = indent(indent);
sb.append("\n").append(s).append("QUADS {");
int i = 0;
for (IStatementContainer v : this) {
if (i >= 10) {
/**
* Truncate the description.
*
* Note: People sometimes push a LOT of data through with a
* DeleteInsertWhere operation. This truncates the description
* to avoid problems with log files or the echo of the update
* operations in a request by the NSS.
*
* @see https://sourceforge.net/apps/trac/bigdata/ticket/613
* (SPARQL UPDATE response inlines large DELETE or INSERT
* triple graphs)
*
* @see https ://sourceforge.net/projects/bigdata/forums/forum
* /676946/topic/6092294/index/page/1
*/
sb.append("... out of " + arity() + " elements\n");
// Break out of the loop.
break;
}
sb.append(v.toString(indent + 1));
i++;
}
sb.append("\n").append(s).append("}");
return sb.toString();
}
}