/*
* 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.sdb.core;
import java.util.Collections;
import java.util.Set;
import org.apache.jena.sparql.core.Var ;
public class ScopeNull implements Scope
{
@Override
public boolean isEmpty() { return false ; }
@Override
public boolean hasColumnForVar(Var var) { return false ; }
@Override
public ScopeEntry findScopeForVar(Var var) { return null ; }
@Override
public Set<Var> getVars() { return Collections.emptySet() ; }
@Override
public Set<ScopeEntry> findScopes() { return Collections.emptySet() ; }
@Override public String toString() { return "ScopeNull" ; }
}