| /* |
| * 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 java.util.List ; |
| import java.util.regex.Pattern ; |
| |
| import org.apache.jena.sparql.expr.nodevalue.XSDFuncOp ; |
| import org.apache.jena.sparql.sse.Tags ; |
| |
| public class E_StrReplace extends ExprFunctionN { |
| private static final String symbol = Tags.tagReplace ; |
| private Pattern pattern = null ; |
| |
| public E_StrReplace(Expr expr1, Expr expr2, Expr expr3, Expr expr4) { |
| super(symbol, expr1, expr2, expr3, expr4) ; |
| |
| if ( isString(expr2) && (expr4 == null || isString(expr4)) ) { |
| String flags = null; |
| if ( expr4 != null && expr4.isConstant() && expr4.getConstant().isString() ) |
| flags = expr4.getConstant().getString(); |
| String patternStr = expr2.getConstant().getString(); |
| pattern = RegexJava.makePattern("REPLACE", patternStr, flags); |
| } |
| } |
| |
| private static boolean isString(Expr expr) { |
| return expr.isConstant() && expr.getConstant().isString() ; |
| } |
| |
| @Override |
| public NodeValue eval(List<NodeValue> args) { |
| if ( pattern != null ) |
| return XSDFuncOp.strReplace(args.get(0), pattern, args.get(2)) ; |
| |
| if ( args.size() == 3 ) |
| return XSDFuncOp.strReplace(args.get(0), args.get(1), args.get(2)) ; |
| return XSDFuncOp.strReplace(args.get(0), args.get(1), args.get(2), args.get(3)) ; |
| } |
| |
| @Override |
| public Expr copy(ExprList newArgs) { |
| if ( newArgs.size() == 3 ) |
| return new E_StrReplace(newArgs.get(0), newArgs.get(1), newArgs.get(2), null) ; |
| return new E_StrReplace(newArgs.get(0), newArgs.get(1), newArgs.get(2), newArgs.get(3)) ; |
| } |
| } |