| /* |
| * 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.syntax.syntaxtransform; |
| |
| import java.util.List ; |
| |
| import org.apache.jena.graph.Node ; |
| import org.apache.jena.graph.Triple; |
| import org.apache.jena.query.Query ; |
| import org.apache.jena.sparql.core.Var ; |
| import org.apache.jena.sparql.expr.Expr ; |
| import org.apache.jena.sparql.syntax.* ; |
| |
| /** Transformation function on an Element that does nothing. |
| * Do not extend - it assumes that no change below happens. |
| * Use {@link ElementTransformCopyBase} instead. |
| * @see ElementTransformer |
| * @see ElementTransformCopyBase |
| */ |
| public final class ElementTransformIdentity implements ElementTransform |
| { |
| private ElementTransformIdentity() {} |
| private static ElementTransformIdentity singleton = new ElementTransformIdentity() ; |
| static ElementTransform get() { return singleton ; } |
| |
| @Override |
| public Element transform(ElementTriplesBlock el) { return el ; } |
| @Override |
| public Element transform(ElementPathBlock el) { return el ; } |
| @Override |
| public Element transform(ElementFilter el, Expr expr2) { return el ; } |
| @Override |
| public Element transform(ElementAssign el, Var v, Expr expr2) { return el ; } |
| @Override |
| public Element transform(ElementBind el, Var v, Expr expr2) { return el ; } |
| @Override |
| public Element transform(ElementFind el, Var v, Triple triple2) { return el ; } |
| @Override |
| public Triple transform(Triple triple) { return triple; } |
| @Override |
| public Element transform(ElementData el) { return el ; } |
| @Override |
| public Element transform(ElementUnion el, List<Element> elements) { return el ; } |
| @Override |
| public Element transform(ElementOptional el, Element opElt) { return el ; } |
| @Override |
| public Element transform(ElementGroup el, List<Element> members) { return el ; } |
| @Override |
| public Element transform(ElementDataset el, Element subElt) { return el ; } |
| @Override |
| public Element transform(ElementNamedGraph el, Node gn, Element subElt) { return el ; } |
| @Override |
| public Element transform(ElementExists el, Element subElt) { return el ; } |
| @Override |
| public Element transform(ElementNotExists el, Element subElt) { return el ; } |
| @Override |
| public Element transform(ElementMinus el, Element eltRHS) { return el ; } |
| @Override |
| public Element transform(ElementService el, Node service, Element subElt) { return el ; } |
| @Override |
| public Element transform(ElementSubQuery el, Query query) { return el ; } |
| } |
| |