org.wildfly.client.config.XIncludeXMLStreamReader Maven / Gradle / Ivy
Go to download
This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including
all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and
Jakarta Messaging BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
/*
* JBoss, Home of Professional Open Source.
* Copyright 2015 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* 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.wildfly.client.config;
import static org.wildfly.client.config._private.ConfigMessages.msg;
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.net.URLConnection;
import java.nio.charset.Charset;
import java.nio.charset.IllegalCharsetNameException;
import java.nio.charset.StandardCharsets;
import java.nio.charset.UnsupportedCharsetException;
import java.util.NoSuchElementException;
import javax.xml.stream.XMLStreamException;
/**
* @author David M. Lloyd
*/
final class XIncludeXMLStreamReader extends AbstractDelegatingXMLStreamReader {
static final String XINCLUDE_NS = "http://www.w3.org/2001/XInclude";
private ConfigurationXMLStreamReader child;
XIncludeXMLStreamReader(final ConfigurationXMLStreamReader delegate) {
super(true, delegate);
}
private ConfigurationXMLStreamReader getRawDelegate() {
return super.getDelegate();
}
protected ConfigurationXMLStreamReader getDelegate() {
final ConfigurationXMLStreamReader child = this.child;
return child != null ? child : getRawDelegate();
}
public void skipContent() throws ConfigXMLParseException {
while (getDelegate().hasNext()) {
switch (getDelegate().next()) {
case START_ELEMENT: {
skipContent();
break;
}
case END_ELEMENT: {
return;
}
}
}
}
public int next() throws ConfigXMLParseException {
final ConfigurationXMLStreamReader child = this.child;
if (child != null) {
if (child.hasNext()) {
final int next = child.next();
if (next != END_DOCUMENT) {
return next;
} else {
child.close();
}
}
this.child = null;
}
final ConfigurationXMLStreamReader delegate = this.getDelegate();
if (! delegate.hasNext()) {
throw new NoSuchElementException();
}
int res;
for (;;) {
res = delegate.next();
if (res == START_ELEMENT) {
final String namespaceURI = delegate.getNamespaceURI();
if (XINCLUDE_NS.equals(namespaceURI)) {
switch (delegate.getLocalName()) {
case "include": {
ConfigurationXMLStreamReader nested = processInclude();
boolean ok = false;
try {
if (nested != null && nested.hasNext()) {
int eventType = nested.next();
if (eventType == START_DOCUMENT) {
if (! nested.hasNext()) {
// close nested and keep going
continue;
}
eventType = nested.next();
}
this.child = new XIncludeXMLStreamReader(nested);
ok = true;
return eventType;
} else {
// fallback to empty, discard nested content
ok = true;
continue;
}
} finally {
if (!ok) try {
nested.close();
} catch (ConfigXMLParseException ignored) {
}
}
}
default: {
throw msg.unexpectedElement(delegate.getLocalName(), namespaceURI, getLocation());
}
}
} else {
// some other boring element!
return res;
}
}
return res;
}
}
private ConfigurationXMLStreamReader processInclude() throws ConfigXMLParseException {
// save this for later
final ScopedXMLStreamReader includeElement = new ScopedXMLStreamReader(false, getRawDelegate());
final ConfigurationXMLStreamReader delegate = this.getDelegate();
final int attributeCount = delegate.getAttributeCount();
URI href = null;
Charset textCharset = StandardCharsets.UTF_8;
boolean fallback = false;
String accept = null;
String acceptLanguage = null;
boolean parseAsText = false;
for (int i = 0; i < attributeCount; i ++) {
if (delegate.getAttributeNamespace(i) == null) {
switch (delegate.getAttributeLocalName(i)) {
case "href": {
try {
href = new URI(delegate.getAttributeValue(i));
} catch (URISyntaxException e) {
throw new ConfigXMLParseException("Invalid include URI", getLocation(), e);
}
if (href.getFragment() != null) {
throw new ConfigXMLParseException("Invalid include URI: must not contain fragment identifier", getLocation());
}
fallback |= href.isOpaque();
break;
}
case "parse": {
switch (delegate.getAttributeValue(i)) {
case "xml": parseAsText = false; break;
case "text": parseAsText = true; break;
default: throw new ConfigXMLParseException("Invalid include directive: unknown parse type (must be \"text\" or \"xml\")", getLocation());
}
break;
}
case "xpointer": {
// no xpointer support
fallback = true;
break;
}
case "encoding": {
try {
textCharset = Charset.forName(delegate.getAttributeValue(i));
} catch (IllegalCharsetNameException | UnsupportedCharsetException e) {
// bad charset
fallback = true;
break;
}
break;
}
case "accept": {
accept = delegate.getAttributeValue(i);
break;
}
case "accept-language": {
acceptLanguage = delegate.getAttributeValue(i);
break;
}
// ignore others
}
}
}
if (! fallback) {
if (href == null) {
throw delegate.missingRequiredAttribute(null, "href");
}
final URL url;
final InputStream inputStream;
ConfigurationXMLStreamReader child;
try {
if (! href.isAbsolute()) {
href = getRawDelegate().getUri().resolve(href);
}
url = href.toURL();
final URLConnection connection = url.openConnection();
connection.addRequestProperty("Accept", accept != null ? accept : parseAsText ? "text/plain,text/*" : "application/xml,text/xml,application/*+xml,text/*+xml");
if (acceptLanguage != null) connection.addRequestProperty("Accept-Language", acceptLanguage);
inputStream = connection.getInputStream();
try {
if (parseAsText) {
child = new TextXMLStreamReader(textCharset, inputStream, this, href);
} else {
child = new XIncludeXMLStreamReader(new BasicXMLStreamReader(getLocation(), getXmlInputFactory().createXMLStreamReader(inputStream), href, getXmlInputFactory(), inputStream));
}
} catch (XMLStreamException e) {
try {
inputStream.close();
} catch (Throwable e1) {
e.addSuppressed(e1);
}
throw ConfigXMLParseException.from(e, getUri(), getIncludedFrom());
} catch (Throwable t) {
try {
inputStream.close();
} catch (Throwable e1) {
t.addSuppressed(e1);
}
throw t;
}
} catch (IOException e) {
throw ConfigXMLParseException.from(e, getUri(), getIncludedFrom());
}
try {
// consume remaining content
getRawDelegate().skipContent();
return child;
} catch (Throwable t) {
try {
child.close();
} catch (Throwable t2) {
t.addSuppressed(t2);
}
throw t;
}
}
// fallback
// first, seek to first fallback element
while (super.hasNext()) {
switch (super.next()) {
case START_ELEMENT: {
if (XINCLUDE_NS.equals(super.getNamespaceURI()) && "fallback".equals(super.getLocalName())) {
return child = new ScopedXMLStreamReader(true, new DrainingXMLStreamReader(false, includeElement));
} else {
int level = 0;
out: while (super.hasNext()) {
switch (super.next()) {
case START_ELEMENT: {
level ++;
break;
}
case END_ELEMENT: {
if (level -- == 0) {
break out;
} else {
break;
}
}
}
}
}
break;
}
case END_ELEMENT: {
return null;
}
}
}
return null;
}
}
© 2015 - 2025 Weber Informatics LLC | Privacy Policy