org.n52.svalbard.util.W3cHelper Maven / Gradle / Ivy
/*
* Copyright 2015-2020 52°North Initiative for Geospatial Open Source
* Software GmbH
*
* 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 org.n52.svalbard.util;
import java.io.IOException;
import java.io.StringWriter;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
/**
* Helper class for W3C
*
* @since 1.0.0
*
*/
public final class W3cHelper {
private W3cHelper() {
}
/**
* Parses w3c.Node to String
*
* @param node
* Node to parse.
*
* @return Node as String.
*
* @throws IOException
* if an error occurs.
*/
public static String nodeToXmlString(Node node) throws IOException {
try (StringWriter sw = new StringWriter()) {
Transformer t = TransformerFactory.newInstance().newTransformer();
t.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
t.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
t.transform(new DOMSource(node), new StreamResult(sw));
return sw.toString();
} catch (TransformerException te) {
throw new IOException(te);
}
}
/**
* Get text content from element by namespace.
*
* @param element
* element
* @param namespaceURI
* Namespace URI
* @param localName
* local name
*
* @return Text content.
*/
public static String getContentFromElement(Element element, String namespaceURI, String localName) {
String elementContent = null;
NodeList nodes = element.getElementsByTagNameNS(namespaceURI, localName);
for (int i = 0; i < nodes.getLength(); i++) {
elementContent = nodes.item(i).getTextContent();
}
return elementContent;
}
}