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| package de.soderer.utilities.xml;
import java.io.BufferedInputStream;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.StringReader;
import java.io.StringWriter;
import java.io.UnsupportedEncodingException;
import java.net.URL;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.TransformerFactoryConfigurationError;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang3.StringUtils;
import org.apache.log4j.Logger;
import org.w3c.dom.Attr;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.EntityResolver;
import org.xml.sax.ErrorHandler;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
/**
* Utilities class to work with XML documents.
*/
public class XmlUtilities {
/** Logger. */
private static final transient Logger logger = Logger.getLogger(XmlUtilities.class);
/**
* Gets the empty document.
*
* @return the empty document
* @throws ParserConfigurationException the parser configuration exception
*/
public static Document getEmptyDocument() throws ParserConfigurationException {
DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder();
Document document = documentBuilder.newDocument();
return document;
}
/**
* Download and parse xml file.
*
* @param url the url
* @return the document
* @throws IOException the IO exception
*/
public static Document downloadAndParseXmlFile(String url) throws IOException {
BufferedInputStream inputStream = null;
try {
inputStream = new BufferedInputStream(new URL(url).openStream());
DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder();
Document document = documentBuilder.parse(new InputSource(inputStream));
return document;
} catch (Exception e) {
return null;
} finally {
if (inputStream != null) {
inputStream.close();
}
}
}
/**
* Gets a single x path node.
*
* @param document the document
* @param xpathExpression the xpath expression
* @return the single x path node
*/
public static Node getSingleXPathNode(Document document, String xpathExpression) {
if (document == null) {
return null;
} else if (StringUtils.isBlank(xpathExpression)) {
return null;
} else {
try {
NodeList nodeList = (NodeList)XPathFactory.newInstance().newXPath().evaluate(xpathExpression, document, XPathConstants.NODESET);
if (nodeList != null && nodeList.getLength() > 0) {
return nodeList.item(0);
} else {
return null;
}
} catch (XPathExpressionException e) {
return null;
}
}
}
/**
* Parses a xml string.
*
* @param xmlInput the xml input
* @return the document
* @throws Exception the exception
*/
public static Document parseXmlString(String xmlInput) throws Exception {
boolean validation = false;
boolean ignoreWhitespace = true;
boolean ignoreComments = true;
boolean putCDATAIntoText = true;
boolean createEntityRefs = false;
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
// set the configuration options
dbf.setValidating(validation);
dbf.setIgnoringComments(ignoreComments);
dbf.setIgnoringElementContentWhitespace(ignoreWhitespace);
dbf.setCoalescing(putCDATAIntoText);
// The opposite of creating entity ref nodes is expanding them inline
dbf.setExpandEntityReferences(!createEntityRefs);
DocumentBuilder db = null;
Document doc = null;
try {
db = dbf.newDocumentBuilder();
doc = db.parse(new InputSource(new StringReader(xmlInput)));
return doc;
} catch (Exception e) {
logger.error("Error while parsing xml", e);
throw e;
}
}
/**
* Ignores DTD for better performance. This works faster for XHTML, because it doesn't download the dtd from any website like "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"
*
* @param xmlInput the xml input
* @return the document
* @throws Exception the exception
*/
public static Document parseXmlStringIngoringDtd(String xmlInput) throws Exception {
if (xmlInput == null) {
throw new Exception("XML-Data is null");
} else if (StringUtils.isBlank(xmlInput)) {
throw new Exception("XML-Data is empty");
}
boolean validation = false;
boolean ignoreWhitespace = true;
boolean ignoreComments = true;
boolean putCDATAIntoText = true;
boolean createEntityRefs = false;
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
// set the configuration options
dbf.setValidating(validation);
dbf.setIgnoringComments(ignoreComments);
dbf.setIgnoringElementContentWhitespace(ignoreWhitespace);
dbf.setCoalescing(putCDATAIntoText);
// The opposite of creating entity ref nodes is expanding them inline
dbf.setExpandEntityReferences(!createEntityRefs);
DocumentBuilder db = null;
Document doc = null;
try {
db = dbf.newDocumentBuilder();
db.setEntityResolver(new EntityResolver() {
public InputSource resolveEntity(String publicId, String systemId) throws SAXException, IOException {
return new InputSource(new StringReader(""));
}
});
doc = db.parse(new InputSource(new StringReader(xmlInput)));
return doc;
} catch (Exception e) {
logger.error("Error while parsing xHtml", e);
throw e;
}
}
/**
* Returns the content of a simple text tag If there are more than one text node or other nodetypes it will return null.
*
* @param node the node
* @return the simple text value from node
*/
public static String getSimpleTextValueFromNode(Node node) {
if (node != null && node.getChildNodes().getLength() == 1 && node.getChildNodes().item(0).getNodeType() == Node.TEXT_NODE) {
return node.getChildNodes().item(0).getTextContent();
} else {
return null;
}
}
/**
* Gets a attribute value.
*
* @param pNode the p node
* @param pAttributeName the p attribute name
* @return the attribute value
*/
public static String getAttributeValue(Node pNode, String pAttributeName) {
String returnString = null;
NamedNodeMap attributes = pNode.getAttributes();
if (attributes != null) {
for (int i = 0; i < attributes.getLength(); i++) {
if (attributes.item(i).getNodeName().equalsIgnoreCase(pAttributeName)) {
returnString = attributes.item(i).getNodeValue();
break;
}
}
}
return returnString;
}
/**
* Gets a node value.
*
* @param pNode the p node
* @return the node value
*/
public static String getNodeValue(Node pNode) {
if (pNode.getNodeValue() != null) {
return pNode.getNodeValue();
} else if (pNode.getFirstChild() != null) {
return getNodeValue(pNode.getFirstChild());
} else {
return null;
}
}
/**
* Gets the node as string.
*
* @param pNode the p node
* @param encoding the encoding
* @param pRemoveXmlLine the p remove xml line
* @return the node as string
* @throws Exception the exception
*/
public static String getNodeAsString(Node pNode, String encoding, boolean pRemoveXmlLine) throws Exception {
StringWriter writer = new StringWriter();
StreamResult result = new StreamResult(writer);
transformNode(pNode, encoding, pRemoveXmlLine, result);
return writer.toString();
}
/**
* Gets the node as raw.
*
* @param pNode the p node
* @param encoding the encoding
* @param pRemoveXmlLine the p remove xml line
* @return the node as raw
* @throws Exception the exception
*/
public static byte[] getNodeAsRaw(Node pNode, String encoding, boolean pRemoveXmlLine) throws Exception {
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
StreamResult result = new StreamResult(outputStream);
transformNode(pNode, encoding, pRemoveXmlLine, result);
return outputStream.toByteArray();
}
/**
* Write document to file.
*
* @param document the document
* @param encoding the encoding
* @param file the file
* @throws Exception the exception
*/
public static void writeDocumentToFile(Document document, String encoding, File file) throws Exception {
OutputStream outputStream = null;
try {
outputStream = new FileOutputStream(file);
StreamResult result = new StreamResult(outputStream);
transformNode(document, encoding, false, result);
} finally {
IOUtils.closeQuietly(outputStream);
}
}
/**
* Transform node.
*
* @param node the node
* @param encoding the encoding
* @param removeXmlHeader the remove xml header
* @param result the result
* @throws Exception the exception
*/
private static void transformNode(Node node, String encoding, boolean removeXmlHeader, StreamResult result) throws Exception {
TransformerFactory transformerFactory = null;
Transformer transformer = null;
DOMSource source = null;
try {
transformerFactory = TransformerFactory.newInstance();
if (transformerFactory == null) {
throw new Exception("TransformerFactory error");
}
transformer = transformerFactory.newTransformer();
if (transformer == null) {
throw new Exception("Transformer error");
}
transformer.setOutputProperty(OutputKeys.ENCODING, encoding);
if (removeXmlHeader) {
transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
} else {
transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "no");
}
source = new DOMSource(node);
transformer.transform(source, result);
} catch (TransformerFactoryConfigurationError e) {
throw new Exception("TransformerFactoryConfigurationError", e);
} catch (TransformerConfigurationException e) {
throw new Exception("TransformerConfigurationException", e);
} catch (TransformerException e) {
throw new Exception("TransformerException", e);
}
}
/**
* Parses the xml data and xsd verify by dom.
*
* @param pData the p data
* @param byteEncoding the byte encoding
* @param xsdFileName the xsd file name
* @return the document
* @throws Exception the exception
* @throws Exception the exception
*/
public static Document parseXMLDataAndXSDVerifyByDOM(byte[] pData, String byteEncoding, String xsdFileName) throws Exception, Exception {
try {
if (pData == null) {
return null;
}
if (pData[pData.length - 1] == 0) {
pData = new String(pData, "UTF-8").trim().getBytes("UTF-8");
}
DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory.newInstance();
if (docBuilderFactory == null) {
throw new Exception("DocumentBuilderFactory error");
}
docBuilderFactory.setNamespaceAware(true);
if (xsdFileName != null) {
String schemaURI = xsdFileName;
docBuilderFactory.setValidating(true);
docBuilderFactory.setAttribute("http://java.sun.com/xml/jaxp/properties/schemaLanguage", "http://www.w3.org/2001/XMLSchema");
docBuilderFactory.setAttribute("http://java.sun.com/xml/jaxp/properties/schemaSource", schemaURI);
}
DocumentBuilder docBuilder = docBuilderFactory.newDocumentBuilder();
if (docBuilder == null) {
throw new Exception("DocumentBuilder error");
}
InputSource inputSource = new InputSource(new ByteArrayInputStream(pData));
if (byteEncoding != null) {
inputSource.setEncoding(byteEncoding);
}
ParseErrorHandler errorHandler = new ParseErrorHandler();
docBuilder.setErrorHandler(errorHandler);
Document xmlDocument = docBuilder.parse(inputSource);
if (errorHandler.problemsOccurred()) {
throw new Exception("ErrorConstGlobals.XML_SCHEMA_ERROR " + xsdFileName + " " + errorHandler.getMessage());
} else {
return xmlDocument;
}
} catch (ParserConfigurationException e) {
logger.error(e.getClass().getSimpleName(), e);
throw new Exception("ErrorConstException.XML_PROCESSING " + e.getClass().getSimpleName() + " " + e.getMessage(), e);
} catch (SAXException e) {
logger.error(e.getClass().getSimpleName(), e);
throw new Exception("ErrorConstException.XML_PROCESSING " + e.getClass().getSimpleName() + " " + e.getMessage(), e);
} catch (IOException e) {
logger.error(e.getClass().getSimpleName() + " während der XML-Verarbeitung", e);
throw new Exception("ErrorConstException.XML_PROCESSING " + e.getClass().getSimpleName() + " " + e.getMessage(), e);
}
}
/**
* The Class ParseErrorHandler.
*/
private static class ParseErrorHandler implements ErrorHandler {
/** The warnings. */
ArrayList<SAXParseException> warnings = null;
/** The errors. */
ArrayList<SAXParseException> errors = null;
/** The fatal errors. */
ArrayList<SAXParseException> fatalErrors = null;
/** The problems. */
boolean problems = false;
/**
* Problems occurred.
*
* @return true, if problems occurred
*/
public boolean problemsOccurred() {
return problems;
}
/* (non-Javadoc)
* @see org.xml.sax.ErrorHandler#warning(org.xml.sax.SAXParseException)
*/
public void warning(SAXParseException exception) throws SAXException {
problems = true;
if (warnings == null) {
warnings = new ArrayList<SAXParseException>();
}
warnings.add(exception);
}
/* (non-Javadoc)
* @see org.xml.sax.ErrorHandler#error(org.xml.sax.SAXParseException)
*/
public void error(SAXParseException exception) throws SAXException {
problems = true;
if (errors == null) {
errors = new ArrayList<SAXParseException>();
}
errors.add(exception);
}
/* (non-Javadoc)
* @see org.xml.sax.ErrorHandler#fatalError(org.xml.sax.SAXParseException)
*/
public void fatalError(SAXParseException exception) throws SAXException {
problems = true;
if (fatalErrors == null) {
fatalErrors = new ArrayList<SAXParseException>();
}
fatalErrors.add(exception);
}
/**
* Gets the message.
*
* @return the message
*/
public String getMessage() {
if (fatalErrors != null && fatalErrors.size() > 0) {
return fatalErrors.get(0).getMessage();
} else if (errors != null && errors.size() > 0) {
return errors.get(0).getMessage();
} else if (warnings != null && warnings.size() > 0) {
return warnings.get(0).getMessage();
} else {
return "No ParserErrors occured";
}
}
}
/**
* Convert xml to string.
*
* @param pDocument the p document
* @param encoding the encoding
* @return the string
* @throws Exception the exception
*/
public static String convertXML2String(Document pDocument, String encoding) throws Exception {
TransformerFactory transformerFactory = null;
Transformer transformer = null;
DOMSource domSource = null;
StringWriter writer = new java.io.StringWriter();
StreamResult result = null;
try {
transformerFactory = TransformerFactory.newInstance();
if (transformerFactory == null) {
throw new Exception("TransformerFactory error");
}
transformer = transformerFactory.newTransformer();
if (transformer == null) {
throw new Exception("Transformer error");
}
if (encoding != null) {
transformer.setOutputProperty(OutputKeys.ENCODING, encoding);
} else {
transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
}
domSource = new DOMSource(pDocument);
result = new StreamResult(writer);
transformer.transform(domSource, result);
return writer.toString();
} catch (TransformerFactoryConfigurationError e) {
throw new Exception("TransformerFactoryConfigurationError", e);
} catch (TransformerConfigurationException e) {
throw new Exception("TransformerConfigurationException", e);
} catch (TransformerException e) {
throw new Exception("TransformerException", e);
} finally {
try {
if (writer != null) {
writer.close();
}
} catch (IOException ex) {
throw new Exception("IO error", ex);
}
}
}
/**
* Convert xml to byte array.
*
* @param pDocument the p document
* @param encoding the encoding
* @return the byte[]
* @throws Exception the exception
*/
public static byte[] convertXML2ByteArray(Node pDocument, String encoding) throws Exception {
TransformerFactory transformerFactory = null;
Transformer transformer = null;
DOMSource domSource = null;
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
StreamResult result = null;
try {
transformerFactory = TransformerFactory.newInstance();
if (transformerFactory == null) {
throw new Exception("TransformerFactory error");
}
transformer = transformerFactory.newTransformer();
if (transformer == null) {
throw new Exception("Transformer error");
}
if (encoding != null) {
transformer.setOutputProperty(OutputKeys.ENCODING, encoding);
} else {
transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
}
domSource = new DOMSource(pDocument);
result = new StreamResult(outputStream);
transformer.transform(domSource, result);
return outputStream.toByteArray();
} catch (TransformerFactoryConfigurationError e) {
throw new Exception("TransformerFactoryConfigurationError", e);
} catch (TransformerConfigurationException e) {
throw new Exception("TransformerConfigurationException", e);
} catch (TransformerException e) {
throw new Exception("TransformerException", e);
} finally {
try {
if (outputStream != null) {
outputStream.close();
}
} catch (IOException ex) {
throw new Exception("IO error", ex);
}
}
}
/**
* Creates the root tag node.
*
* @param baseDocument the base document
* @param rootTagName the root tag name
* @return the element
*/
public static Element createRootTagNode(Document baseDocument, String rootTagName) {
Element newNode = baseDocument.createElement(rootTagName);
baseDocument.appendChild(newNode);
return newNode;
}
/**
* Append node.
*
* @param baseNode the base node
* @param tagName the tag name
* @return the element
*/
public static Element appendNode(Node baseNode, String tagName) {
Element newNode = baseNode.getOwnerDocument().createElement(tagName);
baseNode.appendChild(newNode);
return newNode;
}
/**
* Append text value node.
*
* @param baseNode the base node
* @param tagName the tag name
* @param tagValue the tag value
* @return the element
*/
public static Element appendTextValueNode(Node baseNode, String tagName, int tagValue) {
return appendTextValueNode(baseNode, tagName, Integer.toString(tagValue));
}
/**
* Append text value node.
*
* @param baseNode the base node
* @param tagName the tag name
* @param tagValue the tag value
* @return the element
*/
public static Element appendTextValueNode(Node baseNode, String tagName, String tagValue) {
Element newNode = appendNode(baseNode, tagName);
if (tagValue == null) {
newNode.appendChild(baseNode.getOwnerDocument().createTextNode("<null>"));
} else {
newNode.appendChild(baseNode.getOwnerDocument().createTextNode(tagValue));
}
return newNode;
}
/**
* Append attribute.
*
* @param baseNode the base node
* @param attributeName the attribute name
* @param attributeValue the attribute value
*/
public static void appendAttribute(Element baseNode, String attributeName, boolean attributeValue) {
appendAttribute(baseNode, attributeName, attributeValue ? "true" : "false");
}
/**
* Append attribute.
*
* @param baseNode the base node
* @param attributeName the attribute name
* @param attributeValue the attribute value
*/
public static void appendAttribute(Element baseNode, String attributeName, int attributeValue) {
appendAttribute(baseNode, attributeName, Integer.toString(attributeValue));
}
/**
* Append attribute.
*
* @param baseNode the base node
* @param attributeName the attribute name
* @param attributeValue the attribute value
*/
public static void appendAttribute(Element baseNode, String attributeName, String attributeValue) {
Attr typeAttribute = baseNode.getOwnerDocument().createAttribute(attributeName);
if (attributeValue == null) {
typeAttribute.setNodeValue("<null>");
} else {
typeAttribute.setNodeValue(attributeValue);
}
baseNode.setAttributeNode(typeAttribute);
}
/**
* Removes the attribute.
*
* @param baseNode the base node
* @param attributeName the attribute name
*/
public static void removeAttribute(Element baseNode, String attributeName) {
baseNode.getAttributes().removeNamedItem(attributeName);
}
/**
* Adds the comment to document.
*
* @param pDocument the p document
* @param pComment the p comment
* @return the document
*/
public static Document addCommentToDocument(Document pDocument, String pComment) {
pDocument.getFirstChild().appendChild(pDocument.createComment(pComment));
return pDocument;
}
/**
* Gets the encoding of xml byte array.
*
* @param xmlData the xml data
* @return the encoding of xml byte array
* @throws Exception the exception
*/
public static String getEncodingOfXmlByteArray(byte[] xmlData) throws Exception {
String encodingAttributeName = "ENCODING";
try {
String first50CharactersInUtf8UpperCase = new String(xmlData, "UTF-8").substring(0, 50).toUpperCase();
if (first50CharactersInUtf8UpperCase.contains(encodingAttributeName)) {
int encodingstart = first50CharactersInUtf8UpperCase.indexOf(encodingAttributeName) + encodingAttributeName.length();
int contentStartEinfach = first50CharactersInUtf8UpperCase.indexOf("'", encodingstart);
int contentStartDoppelt = first50CharactersInUtf8UpperCase.indexOf("\"", encodingstart);
int contentStart = Math.min(contentStartEinfach, contentStartDoppelt);
if (contentStartEinfach < 0) {
contentStart = contentStartDoppelt;
}
if (contentStart < 0) {
throw new Exception("XmlByteArray-Encoding nicht ermittelbar");
}
contentStart = contentStart + 1;
int contentEndSingle = first50CharactersInUtf8UpperCase.indexOf("'", contentStart);
int contentEndDouble = first50CharactersInUtf8UpperCase.indexOf("\"", contentStart);
int contentEnd = Math.min(contentEndSingle, contentEndDouble);
if (contentEndSingle < 0) {
contentEnd = contentEndDouble;
}
if (contentEnd < 0) {
throw new Exception("XmlByteArray-Encoding nicht ermittelbar");
}
String encodingString = first50CharactersInUtf8UpperCase.substring(contentStart, contentEnd);
return encodingString;
} else {
throw new Exception("XmlByteArray-Encoding nicht ermittelbar");
}
} catch (UnsupportedEncodingException e) {
throw new Exception("XmlByteArray-Encoding nicht ermittelbar");
}
}
/**
* Returns all direct simple text value subnodes and their values for a dataNode
*
* Example XML:
* <dataNode>
* <a>1</a>
* <b>2</b>
* <c>3</c>
* </dataNode>
* Returns: a=1, b=2, c=3.
*
* @param dataNode the data node
* @return the simple values of node
*/
public static Map<String, String> getSimpleValuesOfNode(Node dataNode) {
Map<String, String> returnMap = new HashMap<String, String>();
NodeList list = dataNode.getChildNodes();
for (int i = 0; i < list.getLength(); i++) {
Node node = list.item(i);
if (node.getFirstChild() != null && node.getFirstChild().getNodeType() == Node.TEXT_NODE && node.getChildNodes().getLength() == 1) {
returnMap.put(node.getNodeName(), node.getFirstChild().getNodeValue());
}
}
return returnMap;
}
/**
* Gets the sub nodes.
*
* @param dataNode the data node
* @return the sub nodes
*/
public static List<Node> getSubNodes(Node dataNode) {
List<Node> returnList = new ArrayList<Node>();
NodeList list = dataNode.getChildNodes();
for (int i = 0; i < list.getLength(); i++) {
Node node = list.item(i);
returnList.add(node);
}
return returnList;
}
/**
* Gets the nodenames of childs.
*
* @param dataNode the data node
* @return the nodenames of childs
*/
public static List<String> getNodenamesOfChilds(Node dataNode) {
List<String> returnList = new ArrayList<String>();
NodeList list = dataNode.getChildNodes();
for (int i = 0; i < list.getLength(); i++) {
Node node = list.item(i);
if (node.getNodeType() != Node.TEXT_NODE) {
returnList.add(node.getNodeName());
}
}
return returnList;
}
}
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