| /* |
| * 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.knox.gateway.service.definition; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.InputStream; |
| import java.io.InputStreamReader; |
| import java.io.StringWriter; |
| import java.io.Writer; |
| import java.nio.charset.StandardCharsets; |
| |
| import javax.xml.XMLConstants; |
| import javax.xml.bind.annotation.adapters.XmlAdapter; |
| import javax.xml.transform.TransformerFactory; |
| import javax.xml.transform.dom.DOMSource; |
| import javax.xml.transform.stream.StreamResult; |
| |
| import org.apache.knox.gateway.filter.rewrite.api.UrlRewriteRulesDescriptor; |
| import org.apache.knox.gateway.filter.rewrite.impl.xml.XmlUrlRewriteRulesExporter; |
| import org.apache.knox.gateway.filter.rewrite.impl.xml.XmlUrlRewriteRulesImporter; |
| import org.w3c.dom.Node; |
| |
| /** |
| * Serves as a gateway between JAXB marshal/unmarshal and DOM |
| * serializing/digesting. |
| */ |
| public class UrlRewriteRulesDescriptorAdapter extends XmlAdapter<Object, UrlRewriteRulesDescriptor> { |
| |
| private final XmlUrlRewriteRulesExporter xmlRewriteRulesExporter = new XmlUrlRewriteRulesExporter(); |
| private final XmlUrlRewriteRulesImporter xmlRewriteRulesImporter = new XmlUrlRewriteRulesImporter(); |
| |
| @Override |
| public UrlRewriteRulesDescriptor unmarshal(Object value) throws Exception { |
| try (InputStream is = nodeToInputStream((Node) value); InputStreamReader isr = new InputStreamReader(is, StandardCharsets.UTF_8)) { |
| return xmlRewriteRulesImporter.load(isr); |
| } |
| } |
| |
| private static InputStream nodeToInputStream(Node node) throws Exception { |
| try (ByteArrayOutputStream outputStream = new ByteArrayOutputStream()) { |
| TransformerFactory transformerFactory = TransformerFactory.newInstance(); |
| transformerFactory.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, true); |
| transformerFactory.newTransformer().transform(new DOMSource(node), new StreamResult(outputStream)); |
| return new ByteArrayInputStream(outputStream.toByteArray()); |
| } |
| } |
| |
| @Override |
| public Object marshal(UrlRewriteRulesDescriptor value) throws Exception { |
| try (Writer writer = new StringWriter()) { |
| return xmlRewriteRulesExporter.store(value, writer, true); |
| } |
| } |
| } |