com.mycila.xmltool.Utils Maven / Gradle / Ivy
/**
* Copyright (C) 2008 Mycila ([email protected])
*
* 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.
*/
package com.mycila.xmltool;
import org.w3c.dom.Document;
import org.xml.sax.SAXException;
import javax.xml.XMLConstants;
import javax.xml.transform.Source;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamSource;
import javax.xml.validation.SchemaFactory;
import javax.xml.validation.Validator;
import java.io.IOException;
import java.net.URISyntaxException;
import java.net.URL;
/**
* @author Mathieu Carbou ([email protected])
*/
final class Utils {
private Utils() {}
static String getMessage(Throwable cause) {
String message = null;
while (cause != null && (message == null || message.length() == 0)) {
message = cause.getMessage();
cause = cause.getCause();
}
return message == null ? "no description available" : message;
}
static void notEmpty(String name, String value) {
notNull(name, value);
if (value.length() == 0) {
throw new IllegalArgumentException(name + " cannot be empty");
}
}
static void notNull(String name, Object value) {
if (value == null) {
throw new IllegalArgumentException(name + " cannot be null");
}
}
static ValidationResult validate(Document doc, Source... schemas) throws IOException, SAXException {
XMLErrorHandler errorHandler = new XMLErrorHandler();
Validator validator = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI).newSchema(schemas).newValidator();
try {
validator.setErrorHandler(errorHandler);
validator.validate(new DOMSource(doc));
return errorHandler;
} finally {
validator.reset();
}
}
static ValidationResult validate(Document doc, URL... schemaLocations) throws URISyntaxException, IOException, SAXException {
Source[] sources = new Source[schemaLocations.length];
for (int i = 0; i < schemaLocations.length; i++) {
sources[i] = new StreamSource(schemaLocations[i].toURI().toASCIIString());
}
return validate(doc, sources);
}
}