2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright (C) 2017 AT&T Intellectual Property. All rights
7 * ================================================================================
8 * Licensed under the Apache License, Version 2.0 (the "License");
9 * you may not use this file except in compliance with the License.
10 * You may obtain a copy of the License at
12 * http://www.apache.org/licenses/LICENSE-2.0
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
19 * ============LICENSE_END============================================
20 * ===================================================================
24 package org.onap.clamp.clds.transform;
26 import com.sun.org.apache.xalan.internal.xsltc.trax.TransformerFactoryImpl;
27 import java.io.StringReader;
28 import java.io.StringWriter;
30 import javax.xml.XMLConstants;
31 import javax.xml.transform.Templates;
32 import javax.xml.transform.Transformer;
33 import javax.xml.transform.TransformerConfigurationException;
34 import javax.xml.transform.TransformerException;
35 import javax.xml.transform.TransformerFactory;
36 import javax.xml.transform.stream.StreamResult;
37 import javax.xml.transform.stream.StreamSource;
39 import org.onap.clamp.clds.util.ResourceFileUtil;
44 public class XslTransformer {
46 private Templates templates;
49 * Sets Xsl Resource name.
51 * @param xslResourceName xsl resource name
52 * @throws TransformerConfigurationException exception if there is configuration error
54 public void setXslResourceName(String xslResourceName) throws TransformerConfigurationException {
55 TransformerFactory tfactory = new TransformerFactoryImpl();
56 tfactory.setAttribute(XMLConstants.ACCESS_EXTERNAL_DTD, "");
57 tfactory.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, true);
58 templates = tfactory.newTemplates(new StreamSource(ResourceFileUtil.getResourceAsStream(xslResourceName)));
62 * Given xml input, return the transformed result.
64 * @param xml xml string
65 * @throws TransformerException exception during transformation
67 public String doXslTransformToString(String xml) throws TransformerException {
68 StringWriter output = new StringWriter(4096);
70 Transformer transformer = templates.newTransformer();
71 transformer.transform(new StreamSource(new StringReader(xml)), new StreamResult(output));
72 return output.toString();