| /* |
| * 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.expr; |
| |
| import org.apache.jena.sparql.sse.Tags ; |
| |
| public class E_Equals extends ExprFunction2 |
| { |
| private static final String functionName = Tags.tagEQ ; |
| private static final String symbol = Tags.symEQ ; |
| |
| public E_Equals(Expr left, Expr right) |
| { |
| super(left, right, functionName, symbol) ; |
| } |
| |
| @Override |
| public NodeValue eval(NodeValue x, NodeValue y) |
| { |
| // Note: notSameValueAs means "known to be different" |
| // sameValueAs means "know to be the same value" |
| // so they are not opposites |
| |
| boolean b = NodeValue.sameAs(x, y) ; |
| return NodeValue.booleanReturn(b) ; |
| } |
| |
| @Override |
| public Expr copy(Expr e1, Expr e2) { return new E_Equals(e1 , e2) ; } |
| } |