| /* |
| * 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.commons.scxml2.env; |
| |
| import java.io.Serializable; |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.LinkedHashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.apache.commons.scxml2.Evaluator; |
| import org.w3c.dom.Node; |
| import org.w3c.dom.NodeList; |
| |
| /** |
| * Base Evaluator providing common functionality for most Evaluator implementations |
| */ |
| public abstract class AbstractBaseEvaluator implements Evaluator, Serializable { |
| |
| @Override |
| public Object cloneData(final Object data) { |
| if (data != null) { |
| if (data instanceof String || data instanceof Number || data instanceof Boolean) { |
| return data; |
| } |
| if (data instanceof Node) { |
| return ((Node)data).cloneNode(true); |
| } |
| else if (data instanceof NodeList) { |
| NodeList nodeList = (NodeList)data; |
| ArrayList<Node> list = new ArrayList<>(); |
| for (int i = 0, size = nodeList.getLength(); i < size; i++) { |
| list.add(nodeList.item(i).cloneNode(true)); |
| } |
| return list; |
| } |
| else if (data instanceof List) { |
| ArrayList<Object> list = new ArrayList<>(); |
| for (Object v : (List)data) { |
| list.add(cloneData(v)); |
| } |
| return list; |
| } |
| else if (data instanceof Map) { |
| Map<?,?> dataMap = (Map<?,?>)data; |
| HashMap<Object, Object> map = new LinkedHashMap<>(); |
| for (Map.Entry<?,?> entry : dataMap.entrySet()) { |
| map.put(cloneData(entry.getKey()), cloneData(entry.getValue())); |
| } |
| return map; |
| } |
| else { |
| return cloneUnknownDataType(data); |
| } |
| } |
| return data; |
| } |
| |
| /** |
| * Returns cloned value of data of unknown type, to be overridden as desired by specialized Evaluators |
| * @param data data object of unknown type (not of type String, Number, Boolean, Node, NodeList, List or Map) |
| * @return toString() value of data of unknown type |
| */ |
| protected Object cloneUnknownDataType(final Object data) { |
| return data.toString(); |
| } |
| } |