/**
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 Aug 17, 2011
*/
package com.bigdata.rdf.sparql.ast;
import java.util.Map;
import com.bigdata.bop.BOp;
import com.bigdata.bop.Bind;
import com.bigdata.bop.IValueExpression;
/**
* AST node for a GROUP BY clause.
*
* @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a>
* @version $Id$
*/
public class GroupByNode extends ValueExpressionListBaseNode<AssignmentNode> {
/**
*
*/
private static final long serialVersionUID = 1L;
/**
*
*/
public GroupByNode() {
}
/**
* Deep copy constructor.
*/
public GroupByNode(final GroupByNode op) {
super(op);
}
/**
* Shallow copy constructor.
*/
public GroupByNode(final BOp[] args, final Map<String, Object> anns) {
super(args, anns);
}
public void addGroupByVar(final VarNode var) {
addExpr(new AssignmentNode(var, var));
}
/**
* Return the {@link IValueExpression}s for this {@link GroupByNode}.
*/
public IValueExpression[] getValueExpressions() {
final IValueExpression<?>[] exprs = new IValueExpression[size()];
int i = 0;
for (IValueExpressionNode node : this) {
exprs[i++] = new Bind(((AssignmentNode) node).getVar(),
((AssignmentNode) node).getValueExpression());
}
return exprs;
}
@Override
public String toString(final int indent) {
final StringBuilder sb = new StringBuilder();
sb.append("\n").append(indent(indent)).append("group by ");
boolean first = true;
for (IValueExpressionNode v : this) {
if(first) {
first = false;
} else {
sb.append(" ");
}
sb.append(v);
}
return sb.toString();
}
@Override
public boolean equals(final Object o) {
if (this == o)
return true;
if (!(o instanceof GroupByNode))
return false;
return super.equals(o);
}
}