/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.jena.sparql.engine.ref;
import java.util.List ;
import org.apache.jena.graph.Node ;
import org.apache.jena.query.SortCondition ;
import org.apache.jena.sparql.algebra.Table ;
import org.apache.jena.sparql.core.BasicPattern ;
import org.apache.jena.sparql.core.TriplePath ;
import org.apache.jena.sparql.core.Var ;
import org.apache.jena.sparql.core.VarExprList ;
import org.apache.jena.sparql.engine.ExecutionContext ;
import org.apache.jena.sparql.expr.ExprAggregator ;
import org.apache.jena.sparql.expr.ExprList ;
import org.apache.jena.sparql.pfunction.PropFuncArg ;
public interface Evaluator
{
public ExecutionContext getExecContext() ;
public Table basicPattern(BasicPattern pattern) ;
public Table pathPattern(TriplePath triplePath) ;
// Two forms that provide custom code evaluation
public Table procedure(Table table, Node procId, ExprList args) ;
public Table propertyFunction(Table table, Node procId, PropFuncArg subjArgs, PropFuncArg objArgs) ;
public Table assign(Table table, VarExprList exprs) ;
public Table extend(Table table, VarExprList exprs) ;
public Table join(Table tableLeft, Table tableRight) ;
public Table leftJoin(Table tableLeft, Table tableRight, ExprList expr) ;
public Table diff(Table tableLeft, Table tableRight) ;
public Table minus(Table left, Table right) ;
public Table union(Table tableLeft, Table tableRight) ;
public Table condition(Table left, Table right) ;
public Table filter(ExprList expressions, Table tableLeft) ;
public Table unit() ;
public Table list(Table table) ;
public Table order(Table table, List<SortCondition> conditions) ;
public Table groupBy(Table table, VarExprList groupVars, List<ExprAggregator> aggregators) ;
public Table project(Table table, List<Var> projectVars) ;
public Table distinct(Table table) ;
public Table reduced(Table table) ;
public Table slice(Table table, long start, long length) ;
}