org.apache.activemq.artemis.utils.XMLUtil Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.activemq.artemis.utils;
import javax.xml.XMLConstants;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.validation.Schema;
import javax.xml.validation.SchemaFactory;
import javax.xml.validation.Validator;
import java.io.InputStreamReader;
import java.io.Reader;
import java.io.StringReader;
import java.lang.reflect.Method;
import java.net.URL;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.ArrayList;
import java.util.List;
import org.apache.activemq.artemis.core.client.ActiveMQClientLogger;
import org.apache.activemq.artemis.core.client.ActiveMQClientMessageBundle;
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.InputSource;
import org.xml.sax.SAXException;
public final class XMLUtil {
private XMLUtil() {
// Utility class
}
public static Element stringToElement(final String s) throws Exception {
return XMLUtil.readerToElement(new StringReader(s));
}
public static Element urlToElement(final URL url) throws Exception {
return XMLUtil.readerToElement(new InputStreamReader(url.openStream()));
}
public static String readerToString(final Reader r) throws Exception {
// Read into string
StringBuilder buff = new StringBuilder();
int c;
while ((c = r.read()) != -1) {
buff.append((char) c);
}
return buff.toString();
}
public static Element readerToElement(final Reader r) throws Exception {
// Read into string
StringBuffer buff = new StringBuffer();
int c;
while ((c = r.read()) != -1) {
buff.append((char) c);
}
// Quick hardcoded replace, FIXME this is a kludge - use regexp to match properly
String s = buff.toString();
StringReader sreader = new StringReader(s);
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
// see http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6529766
factory.setNamespaceAware(true);
DocumentBuilder parser = factory.newDocumentBuilder();
Document doc = parser.parse(new InputSource(sreader));
return doc.getDocumentElement();
}
public static String elementToString(final Node n) {
String name = n.getNodeName();
short type = n.getNodeType();
if (Node.CDATA_SECTION_NODE == type) {
return "";
}
if (name.startsWith("#")) {
return "";
}
StringBuffer sb = new StringBuffer();
sb.append('<').append(name);
NamedNodeMap attrs = n.getAttributes();
if (attrs != null) {
for (int i = 0; i < attrs.getLength(); i++) {
Node attr = attrs.item(i);
sb.append(' ').append(attr.getNodeName()).append("=\"").append(attr.getNodeValue()).append("\"");
}
}
String textContent = null;
NodeList children = n.getChildNodes();
if (children.getLength() == 0) {
if ((textContent = XMLUtil.getTextContent(n)) != null && !"".equals(textContent)) {
sb.append(textContent).append("');
}
else {
sb.append("/>").append('\n');
}
}
else {
sb.append('>').append('\n');
boolean hasValidChildren = false;
for (int i = 0; i < children.getLength(); i++) {
String childToString = XMLUtil.elementToString(children.item(i));
if (!"".equals(childToString)) {
sb.append(childToString);
hasValidChildren = true;
}
}
if (!hasValidChildren && (textContent = XMLUtil.getTextContent(n)) != null) {
sb.append(textContent);
}
sb.append("');
}
return sb.toString();
}
private static final Object[] EMPTY_ARRAY = new Object[0];
/**
* This metod is here because Node.getTextContent() is not available in JDK 1.4 and I would like
* to have an uniform access to this functionality.
*
* Note: if the content is another element or set of elements, it returns a string representation
* of the hierarchy.
*
* TODO implementation of this method is a hack. Implement it properly.
*/
public static String getTextContent(final Node n) {
if (n.hasChildNodes()) {
StringBuffer sb = new StringBuffer();
NodeList nl = n.getChildNodes();
for (int i = 0; i < nl.getLength(); i++) {
sb.append(XMLUtil.elementToString(nl.item(i)));
if (i < nl.getLength() - 1) {
sb.append('\n');
}
}
String s = sb.toString();
if (s.length() != 0) {
return s;
}
}
Method[] methods = Node.class.getMethods();
for (Method getTextContext : methods) {
if ("getTextContent".equals(getTextContext.getName())) {
try {
return (String) getTextContext.invoke(n, XMLUtil.EMPTY_ARRAY);
}
catch (Exception e) {
ActiveMQClientLogger.LOGGER.errorOnXMLTransform(e, n);
return null;
}
}
}
String textContent = null;
if (n.hasChildNodes()) {
NodeList nl = n.getChildNodes();
for (int i = 0; i < nl.getLength(); i++) {
Node c = nl.item(i);
if (c.getNodeType() == Node.TEXT_NODE) {
textContent = n.getNodeValue();
if (textContent == null) {
// TODO This is a hack. Get rid of it and implement this properly
String s = c.toString();
int idx = s.indexOf("#text:");
if (idx != -1) {
textContent = s.substring(idx + 6).trim();
if (textContent.endsWith("]")) {
textContent = textContent.substring(0, textContent.length() - 1);
}
}
}
if (textContent == null) {
break;
}
}
}
// TODO This is a hack. Get rid of it and implement this properly
String s = n.toString();
int i = s.indexOf('>');
int i2 = s.indexOf(" nodes = XMLUtil.filter(nl, toFilter);
List nodes2 = XMLUtil.filter(nl2, toFilter);
int length = nodes.size();
if (length != nodes2.size()) {
throw ActiveMQClientMessageBundle.BUNDLE.nodeHasDifferentChildNumber();
}
for (int i = 0; i < length; i++) {
Node n = nodes.get(i);
Node n2 = nodes2.get(i);
XMLUtil.assertEquivalent(n, n2);
}
}
}
public static String stripCDATA(String s) {
s = s.trim();
if (s.startsWith("");
if (i == -1) {
throw new IllegalStateException("argument starts with ");
}
s = s.substring(0, i);
}
return s;
}
/* public static String replaceSystemProps(String xml)
{
Properties properties = System.getProperties();
Enumeration e = properties.propertyNames();
while (e.hasMoreElements())
{
String key = (String)e.nextElement();
String s = "${" + key + "}";
if (xml.contains(s))
{
xml = xml.replace(s, properties.getProperty(key));
}
}
return xml;
}*/
public static String replaceSystemProps(String xml) {
while (xml.contains("${")) {
int start = xml.indexOf("${");
int end = xml.indexOf("}") + 1;
if (end < 0) {
break;
}
String subString = xml.substring(start, end);
String prop = subString.substring(2, subString.length() - 1).trim();
String val = "";
if (prop.contains(":")) {
String[] parts = prop.split(":", 2);
prop = parts[0].trim();
val = parts[1].trim();
}
String sysProp = System.getProperty(prop, val);
ActiveMQClientLogger.LOGGER.debug("replacing " + subString + " with " + sysProp);
xml = xml.replace(subString, sysProp);
}
return xml;
}
public static long parseLong(final Node elem) {
String value = elem.getTextContent().trim();
try {
return Long.parseLong(value);
}
catch (NumberFormatException e) {
throw ActiveMQClientMessageBundle.BUNDLE.mustBeLong(elem, value);
}
}
public static int parseInt(final Node elem) {
String value = elem.getTextContent().trim();
try {
return Integer.parseInt(value);
}
catch (NumberFormatException e) {
throw ActiveMQClientMessageBundle.BUNDLE.mustBeInteger(elem, value);
}
}
public static boolean parseBoolean(final Node elem) {
String value = elem.getTextContent().trim();
try {
return Boolean.parseBoolean(value);
}
catch (NumberFormatException e) {
throw ActiveMQClientMessageBundle.BUNDLE.mustBeBoolean(elem, value);
}
}
public static double parseDouble(final Node elem) {
String value = elem.getTextContent().trim();
try {
return Double.parseDouble(value);
}
catch (NumberFormatException e) {
throw ActiveMQClientMessageBundle.BUNDLE.mustBeDouble(elem, value);
}
}
public static void validate(final Node node, final String schemaFile) throws Exception {
SchemaFactory factory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
Schema schema = factory.newSchema(findResource(schemaFile));
Validator validator = schema.newValidator();
// validate the DOM tree
try {
validator.validate(new DOMSource(node));
}
catch (SAXException e) {
ActiveMQClientLogger.LOGGER.errorOnXMLTransformInvalidConf(e);
throw new IllegalStateException("Invalid configuration", e);
}
}
private static List filter(final NodeList nl, final short[] typesToFilter) {
List nodes = new ArrayList();
outer:
for (int i = 0; i < nl.getLength(); i++) {
Node n = nl.item(i);
short type = n.getNodeType();
for (int j = 0; j < typesToFilter.length; j++) {
if (typesToFilter[j] == type) {
continue outer;
}
}
nodes.add(n);
}
return nodes;
}
private static URL findResource(final String resourceName) {
return AccessController.doPrivileged(new PrivilegedAction() {
public URL run() {
return ClassloadingUtil.findResource(resourceName);
}
});
}
// Inner classes --------------------------------------------------------------------------------
}