2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
6 * ================================================================================
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 * ============LICENSE_END=========================================================
21 package org.onap.so.apihandler.common;
24 import java.io.FileInputStream;
25 import java.io.IOException;
27 import javax.xml.XMLConstants;
28 import javax.xml.transform.Source;
29 import javax.xml.transform.stream.StreamSource;
30 import javax.xml.validation.Schema;
31 import javax.xml.validation.SchemaFactory;
32 import javax.xml.validation.Validator;
34 import org.apache.commons.io.IOUtils;
35 import org.onap.so.logger.MessageEnum;
36 import org.onap.so.logger.MsoAlarmLogger;
37 import org.onap.so.logger.MsoLogger;
38 import org.xml.sax.SAXException;
40 public class XMLValidator {
42 private static String XSDS_PATH;
45 String prefixMsoPropertiesPath = System.getProperty ("mso.config.path");
46 if (prefixMsoPropertiesPath == null) {
47 prefixMsoPropertiesPath = "";
49 XSDS_PATH = prefixMsoPropertiesPath + "xsds/";
52 private String stringXsd;
53 private String errorMsg = null;
54 private SchemaFactory factory;
55 private Schema schema;
57 private static MsoLogger msoLogger = MsoLogger.getMsoLogger (MsoLogger.Catalog.APIH, XMLValidator.class);
58 private static MsoAlarmLogger alarmLogger = new MsoAlarmLogger ();
60 public XMLValidator (String xsdFile){
62 try (FileInputStream xsdStream = new FileInputStream (XSDS_PATH + xsdFile)) {
64 stringXsd = IOUtils.toString (xsdStream);
66 factory = SchemaFactory.newInstance (XMLConstants.W3C_XML_SCHEMA_NS_URI);
67 factory.setResourceResolver (new PathResourceResolver (XSDS_PATH));
68 factory.setFeature (XMLConstants.FEATURE_SECURE_PROCESSING, true);
70 String quotedXsd = stringXsd.replaceAll (""", "\"");
71 Source src = new StreamSource (new java.io.StringReader (quotedXsd));
72 schema = factory.newSchema (src);
74 } catch (IOException | SAXException e) {
76 msoLogger.debug ("Cannot open file " + XSDS_PATH + xsdFile, e);
77 errorMsg = "ErrorDetails: xsd file " + xsdFile + "could not be opened - " + e.getMessage ();
81 // Returns null when XML valid, otherwise returns error details.
82 public String isXmlValid (String stringXml) {
84 if (errorMsg != null && !errorMsg.isEmpty ()) {
87 Source src2 = new StreamSource (new java.io.StringReader (stringXml));
88 Validator validator = schema.newValidator ();
89 validator.validate (src2);
91 } catch (IOException | SAXException e) {
92 msoLogger.debug ("Exception: ", e);
93 return "ErrorDetails: " + e.getMessage ();
95 } catch (Exception e) {
96 msoLogger.error (MessageEnum.APIH_CANNOT_READ_SCHEMA, "", "", MsoLogger.ErrorCode.SchemaError, "APIH cannot read schema file", e);
97 alarmLogger.sendAlarm ("MsoConfigurationError", MsoAlarmLogger.CRITICAL, "Unable to read the schema file");
98 return "ErrorDetails: " + "Unable to read the schema file";