/*
* 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.optimizer.reorder;
import org.apache.jena.sparql.core.Var ;
import org.apache.jena.sparql.sse.Item ;
public class PatternElements
{
public static final Item ANY = Item.createSymbol("ANY") ;
public static final Item VAR = Item.createSymbol("VAR") ;
public static final Item TERM = Item.createSymbol("TERM") ;
public static final Item URI = Item.createSymbol("URI") ;
public static final Item BNODE = Item.createSymbol("BNODE") ;
public static final Item LITERAL = Item.createSymbol("LITERAL") ;
public static boolean isSet(Item item)
{
if ( item.isNode() )
{
if ( item.getNode().isConcrete() ) return true ;
}
if (item.equals(TERM) ) return true ;
if (item.equals(URI) ) return true ;
if (item.equals(BNODE) ) return true ;
if (item.equals(LITERAL) ) return true ;
return false ;
}
public static boolean isAny(Item item) { return item.equals(ANY) ; }
public static boolean isAnyTerm(Item item) { return item.equals(TERM) ; }
public static boolean isAnyURI(Item item) { return item.equals(URI) ; }
public static boolean isAnyLiteral(Item item) { return item.equals(LITERAL) ; }
public static boolean isAnyBNode(Item item) { return item.equals(BNODE) ; }
public static boolean isAnyVar(Item item) { return item.equals(VAR) ; }
public static boolean isVar(Item item) { return Var.isVar(item.getNode()) ; }
}