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/*-
* ============LICENSE_START=======================================================
* ONAP - SO
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Licensed 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.
* ============LICENSE_END=========================================================
*/
package org.openecomp.mso.apihandler.common;
import java.io.FileInputStream;
import java.io.IOException;
import javax.xml.XMLConstants;
import javax.xml.transform.Source;
import javax.xml.transform.stream.StreamSource;
import javax.xml.validation.Schema;
import javax.xml.validation.SchemaFactory;
import javax.xml.validation.Validator;
import org.apache.commons.io.IOUtils;
import org.xml.sax.SAXException;
import org.openecomp.mso.logger.MessageEnum;
import org.openecomp.mso.logger.MsoAlarmLogger;
import org.openecomp.mso.logger.MsoLogger;
public class XMLValidator {
private static String XSDS_PATH;
static {
String prefixMsoPropertiesPath = System.getProperty ("mso.config.path");
if (prefixMsoPropertiesPath == null) {
prefixMsoPropertiesPath = "";
}
XSDS_PATH = prefixMsoPropertiesPath + "xsds/";
}
private String stringXsd;
private String errorMsg = null;
private SchemaFactory factory;
private Schema schema;
private static MsoLogger msoLogger = MsoLogger.getMsoLogger (MsoLogger.Catalog.APIH);
private static MsoAlarmLogger alarmLogger = new MsoAlarmLogger ();
public XMLValidator (String xsdFile) {
try (FileInputStream xsdStream = new FileInputStream (XSDS_PATH + xsdFile)) {
stringXsd = IOUtils.toString (xsdStream);
factory = SchemaFactory.newInstance (XMLConstants.W3C_XML_SCHEMA_NS_URI);
factory.setResourceResolver ((new PathResourceResolver (XSDS_PATH)));
factory.setFeature (XMLConstants.FEATURE_SECURE_PROCESSING, true);
String quotedXsd = stringXsd.replaceAll (""", "\"");
Source src = new StreamSource (new java.io.StringReader (quotedXsd));
schema = factory.newSchema (src);
} catch (IOException | SAXException e) {
msoLogger.debug ("Cannot open file " + XSDS_PATH + xsdFile, e);
errorMsg = "ErrorDetails: xsd file " + xsdFile + "could not be opened - " + e.getMessage ();
}
}
// Returns null when XML valid, otherwise returns error details.
public String isXmlValid (String stringXml) {
try {
if (errorMsg != null && !errorMsg.isEmpty ()) {
return errorMsg;
}
Source src2 = new StreamSource (new java.io.StringReader (stringXml));
Validator validator = schema.newValidator ();
validator.validate (src2);
} catch (IOException | SAXException e) {
msoLogger.debug ("Exception: ", e);
return ("ErrorDetails: " + e.getMessage ());
} catch (Exception e) {
msoLogger.error (MessageEnum.APIH_CANNOT_READ_SCHEMA, "", "", MsoLogger.ErrorCode.SchemaError, "APIH cannot read schema file", e);
alarmLogger.sendAlarm ("MsoConfigurationError", MsoAlarmLogger.CRITICAL, "Unable to read the schema file");
return "ErrorDetails: " + "Unable to read the schema file";
}
return null;
}
}
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