com.sun.faces.facelets.compiler.SAXCompiler Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of jakarta.faces Show documentation
Show all versions of jakarta.faces Show documentation
EE4J Compatible Implementation for Jakarta Faces API
/*
* Copyright (c) 1997, 2018 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package com.sun.faces.facelets.compiler;
import static com.sun.faces.config.WebConfiguration.BooleanWebContextInitParameter.DisallowDoctypeDecl;
import com.sun.faces.RIConstants;
import com.sun.faces.config.FaceletsConfiguration;
import com.sun.faces.config.WebConfiguration;
import com.sun.faces.facelets.tag.TagAttributeImpl;
import com.sun.faces.facelets.tag.TagAttributesImpl;
import com.sun.faces.util.Util;
import org.xml.sax.*;
import org.xml.sax.ext.LexicalHandler;
import org.xml.sax.helpers.DefaultHandler;
import javax.faces.view.Location;
import javax.faces.view.facelets.*;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.logging.Level;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;
/**
* Compiler implementation that uses SAX
*
* @author Jacob Hookom
* @see Compiler
* @version $Id$
*/
public final class SAXCompiler extends Compiler {
private final static Pattern XmlDeclaration = Pattern.compile("^<\\?xml.+?version=['\"](.+?)['\"](.+?encoding=['\"]((.+?))['\"])?.*?\\?>");
private static class CompilationHandler extends DefaultHandler implements
LexicalHandler {
protected final String alias;
protected boolean inDocument = false;
protected Locator locator;
protected final CompilationManager unit;
public CompilationHandler(CompilationManager unit, String alias) {
this.unit = unit;
this.alias = alias;
}
@Override
public void characters(char[] ch, int start, int length)
throws SAXException {
if (this.inDocument) {
this.unit.writeText(new String(ch, start, length));
}
}
@Override
public void comment(char[] ch, int start, int length)
throws SAXException {
if (this.inDocument) {
if (!unit.getWebConfiguration().getFaceletsConfiguration().isConsumeComments(alias)) {
this.unit.writeComment(new String(ch, start, length));
}
}
}
protected TagAttributesImpl createAttributes(Attributes attrs) {
int len = attrs.getLength();
TagAttributeImpl[] ta = new TagAttributeImpl[len];
for (int i = 0; i < len; i++) {
ta[i] = new TagAttributeImpl(this.createLocation(),
attrs.getURI(i), attrs.getLocalName(i), attrs
.getQName(i), attrs.getValue(i));
}
return new TagAttributesImpl(ta);
}
protected Location createLocation() {
Location result = null;
if (null != locator) {
result = new Location(this.alias, this.locator.getLineNumber(),
this.locator.getColumnNumber());
} else {
if (log.isLoggable(Level.SEVERE)) {
log.log(Level.SEVERE, "Unable to create Location due to null locator instance variable.");
}
}
return result;
}
@Override
public void endCDATA() throws SAXException {
if (this.inDocument) {
if (!unit.getWebConfiguration().getFaceletsConfiguration().isConsumeCDATA(alias)) {
this.unit.writeInstruction("]]>");
}
}
}
@Override
public void endDocument() throws SAXException {
super.endDocument();
}
@Override
public void endDTD() throws SAXException {
this.inDocument = true;
}
@Override
public void endElement(String uri, String localName, String qName)
throws SAXException {
this.unit.popTag();
}
@Override
public void endEntity(String name) throws SAXException {
}
@Override
public void endPrefixMapping(String prefix) throws SAXException {
this.unit.popNamespace(prefix);
}
@Override
public void fatalError(SAXParseException e) throws SAXException {
if (this.locator != null) {
throw new SAXException("Error Traced[line: "
+ this.locator.getLineNumber() + "] " + e.getMessage());
} else {
throw e;
}
}
@Override
public void ignorableWhitespace(char[] ch, int start, int length)
throws SAXException {
if (this.inDocument) {
this.unit.writeWhitespace(new String(ch, start, length));
}
}
@Override
public InputSource resolveEntity(String publicId, String systemId)
throws SAXException {
String dtd = "com/sun/faces/xhtml/default.dtd";
/*if ("-//W3C//DTD XHTML 1.0 Transitional//EN".equals(publicId)) {
dtd = "xhtml1-transitional.dtd";
} else if (systemId != null && systemId.startsWith("file:/")) {
return new InputSource(systemId);
}*/
URL url = this.getClass().getClassLoader().getResource(dtd);
return new InputSource(url.toString());
}
@Override
public void setDocumentLocator(Locator locator) {
this.locator = locator;
}
@Override
public void startCDATA() throws SAXException {
if (this.inDocument) {
if (!unit.getWebConfiguration().getFaceletsConfiguration().isConsumeCDATA(alias)) {
this.unit.writeInstruction("\n");
// It is essential to save the doctype here because this is the
// *only* time we will have access to it.
Util.saveDOCTYPEToFacesContextAttributes(sb.toString());
}
this.inDocument = false;
}
@Override
public void startElement(String uri, String localName, String qName,
Attributes attributes) throws SAXException {
TagAttributes tagAttrs = this.createAttributes(attributes);
Tag tag = new Tag(this.createLocation(), uri, localName, qName, tagAttrs);
tagAttrs.setTag(tag);
this.unit.pushTag(tag);
}
@Override
public void startEntity(String name) throws SAXException {
}
@Override
public void startPrefixMapping(String prefix, String uri)
throws SAXException {
this.unit.pushNamespace(prefix, uri);
}
@Override
public void processingInstruction(String target, String data)
throws SAXException {
if (this.inDocument) {
// If there is a process-as value for the extension, only allow
// the PI to be written if its value is xhtml
boolean processAsXhtml =
this.unit.getWebConfiguration().getFaceletsConfiguration().isProcessCurrentDocumentAsFaceletsXhtml(alias);
if (processAsXhtml) {
StringBuffer sb = new StringBuffer(64);
sb.append("\n");
this.unit.writeInstruction(sb.toString());
}
}
}
protected boolean isDisallowDoctypeDeclSet() {
return unit.getWebConfiguration().isSet(DisallowDoctypeDecl);
}
protected boolean isDisallowDoctypeDecl() {
return unit.getWebConfiguration().isOptionEnabled(DisallowDoctypeDecl);
}
}
private static class MetadataCompilationHandler extends CompilationHandler {
private static final String METADATA_HANDLER = "metadata";
private boolean processingMetadata = false;
private boolean metadataProcessed = false;
// -------------------------------------------------------- Constructors
public MetadataCompilationHandler(CompilationManager unit, String alias) {
super(unit, alias);
}
// ------------------------------------- Methods from CompilationHandler
@Override
public void characters(char[] ch, int start, int length)
throws SAXException {
if (!metadataProcessed) {
if (processingMetadata) {
// PENDING consider optimizing this to be a no-op
// on whitespace, but don't instantiate the String
// just to test that.
this.unit.writeText(new String(ch, start, length));
}
}
}
@Override
public void comment(char[] ch, int start, int length)
throws SAXException {
// no-op
}
@Override
public void endCDATA() throws SAXException {
// no-op
}
@Override
public void ignorableWhitespace(char[] ch, int start, int length)
throws SAXException {
// no-op
}
@Override
public void startCDATA() throws SAXException {
// no-op
}
@Override
public void startDTD(String name, String publicId, String systemId)
throws SAXException {
// no-op
}
@Override
public void startEntity(String name) throws SAXException {
// no-op
}
@Override
public void processingInstruction(String target, String data)
throws SAXException {
// no-op
}
@Override
public void startElement(String uri, String localName, String qName, Attributes attributes)
throws SAXException {
if (!metadataProcessed) {
if (!processingMetadata &&
(RIConstants.CORE_NAMESPACE.equals(uri) ||
RIConstants.CORE_NAMESPACE_NEW.equals(uri)
)) {
if (METADATA_HANDLER.equals(localName)) {
processingMetadata = true;
}
}
if (processingMetadata) {
super.startElement(uri, localName, qName, attributes);
}
}
if ((localName.equals("view") &&
(RIConstants.CORE_NAMESPACE.equals(uri) || RIConstants.CORE_NAMESPACE_NEW.equals(uri)))) {
super.startElement(uri, localName, qName, attributes);
}
}
@Override
public void endElement(String uri, String localName, String qName)
throws SAXException {
if (!metadataProcessed) {
if (processingMetadata) {
super.endElement(uri, localName, qName);
}
if (processingMetadata &&
(RIConstants.CORE_NAMESPACE.equals(uri) ||
RIConstants.CORE_NAMESPACE_NEW.equals(uri)
)) {
if (METADATA_HANDLER.equals(localName)) {
processingMetadata = false;
metadataProcessed = true;
}
}
}
if ((localName.equals("view") &&
(RIConstants.CORE_NAMESPACE.equals(uri) || RIConstants.CORE_NAMESPACE_NEW.equals(uri)))) {
super.endElement(uri, localName, qName);
}
}
}
public SAXCompiler() {
super();
}
@Override
public FaceletHandler doCompile(URL src, String alias) throws IOException {
CompilationManager mgr = new CompilationManager(alias, this);
CompilationHandler handler = new CompilationHandler(mgr, alias);
return doCompile(mgr, handler, src, alias);
}
@Override
public FaceletHandler doMetadataCompile(URL src, String alias)
throws IOException {
CompilationManager mgr = new CompilationManager("metadata/" + alias, this);
CompilationHandler handler = new MetadataCompilationHandler(mgr, alias);
return doCompile(mgr, handler, src, alias);
}
protected FaceletHandler doCompile(CompilationManager mngr,
CompilationHandler handler,
URL src,
String alias)
throws IOException {
String encoding = getEncoding();
try (InputStream is = new BufferedInputStream(src.openStream(), 1024);) {
writeXmlDecl(is, encoding, mngr);
SAXParser parser = this.createSAXParser(handler);
parser.parse(is, handler);
} catch (SAXException e) {
throw new FaceletException("Error Parsing " + alias + ": "
+ e.getMessage(), e.getCause());
} catch (ParserConfigurationException e) {
throw new FaceletException("Error Configuring Parser " + alias
+ ": " + e.getMessage(), e.getCause());
} catch (FaceletException e) {
throw e;
}
FaceletHandler result = new EncodingHandler(mngr.createFaceletHandler(), encoding,
mngr.getCompilationMessageHolder());
mngr.setCompilationMessageHolder(null);
return result;
}
private String getEncoding() {
String result;
String encodingFromRequest = null;
FacesContext context = FacesContext.getCurrentInstance();
if (null != context) {
ExternalContext extContext = context.getExternalContext();
encodingFromRequest = extContext.getRequestCharacterEncoding();
}
result = (null != encodingFromRequest) ? encodingFromRequest : RIConstants.CHAR_ENCODING;
return result;
}
protected static void writeXmlDecl(InputStream is, String encoding, CompilationManager mngr)
throws IOException {
is.mark(128);
try {
byte[] b = new byte[128];
if (is.read(b) > 0) {
String r = new String(b, encoding);
Matcher m = XmlDeclaration.matcher(r);
if (m.find()) {
WebConfiguration config = mngr.getWebConfiguration();
FaceletsConfiguration faceletsConfig = config.getFaceletsConfiguration();
boolean currentModeIsXhtml = faceletsConfig.isProcessCurrentDocumentAsFaceletsXhtml(mngr.getAlias());
// We want to write the XML declaration if and only if
// the file extension for the current file has a mapping
// with the value of XHTML
if (currentModeIsXhtml) {
Util.saveXMLDECLToFacesContextAttributes(m.group(0) + "\n");
}
}
}
} finally {
is.reset();
}
}
private SAXParser createSAXParser(CompilationHandler handler)
throws SAXException, ParserConfigurationException {
SAXParserFactory factory = Util.createSAXParserFactory();
factory.setNamespaceAware(true);
factory.setFeature("http://xml.org/sax/features/namespace-prefixes",
true);
factory.setFeature("http://xml.org/sax/features/validation", this
.isValidating());
factory.setValidating(this.isValidating());
if (handler.isDisallowDoctypeDeclSet()) {
factory.setFeature("http://apache.org/xml/features/disallow-doctype-decl", handler.isDisallowDoctypeDecl());
}
SAXParser parser = factory.newSAXParser();
XMLReader reader = parser.getXMLReader();
reader.setProperty("http://xml.org/sax/properties/lexical-handler",
handler);
reader.setErrorHandler(handler);
reader.setEntityResolver(handler);
return parser;
}
}