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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.xerces.jaxp;
import java.io.IOException;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.Map;
import javax.xml.XMLConstants;
import javax.xml.validation.Schema;
import org.apache.xerces.impl.Constants;
import org.apache.xerces.impl.validation.ValidationManager;
import org.apache.xerces.impl.xs.XMLSchemaValidator;
import org.apache.xerces.jaxp.validation.XSGrammarPoolContainer;
import org.apache.xerces.util.SAXMessageFormatter;
import org.apache.xerces.util.SecurityManager;
import org.apache.xerces.xni.XMLDocumentHandler;
import org.apache.xerces.xni.parser.XMLComponent;
import org.apache.xerces.xni.parser.XMLComponentManager;
import org.apache.xerces.xni.parser.XMLConfigurationException;
import org.apache.xerces.xni.parser.XMLDocumentSource;
import org.apache.xerces.xni.parser.XMLParserConfiguration;
import org.apache.xerces.xs.AttributePSVI;
import org.apache.xerces.xs.ElementPSVI;
import org.apache.xerces.xs.PSVIProvider;
import org.xml.sax.EntityResolver;
import org.xml.sax.ErrorHandler;
import org.xml.sax.HandlerBase;
import org.xml.sax.InputSource;
import org.xml.sax.Parser;
import org.xml.sax.SAXException;
import org.xml.sax.SAXNotRecognizedException;
import org.xml.sax.SAXNotSupportedException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.DefaultHandler;
/**
* This is the implementation specific class for the
* javax.xml.parsers.SAXParser.
*
* @author Rajiv Mordani
* @author Edwin Goei
*
* @version $Id: SAXParserImpl.java 704573 2008-10-14 16:11:22Z mrglavas $
*/
public class SAXParserImpl extends javax.xml.parsers.SAXParser
implements JAXPConstants, PSVIProvider {
/** Feature identifier: namespaces. */
private static final String NAMESPACES_FEATURE =
Constants.SAX_FEATURE_PREFIX + Constants.NAMESPACES_FEATURE;
/** Feature identifier: namespace prefixes. */
private static final String NAMESPACE_PREFIXES_FEATURE =
Constants.SAX_FEATURE_PREFIX + Constants.NAMESPACE_PREFIXES_FEATURE;
/** Feature identifier: validation. */
private static final String VALIDATION_FEATURE =
Constants.SAX_FEATURE_PREFIX + Constants.VALIDATION_FEATURE;
/** Feature identifier: XML Schema validation */
private static final String XMLSCHEMA_VALIDATION_FEATURE =
Constants.XERCES_FEATURE_PREFIX + Constants.SCHEMA_VALIDATION_FEATURE;
/** Feature identifier: XInclude processing */
private static final String XINCLUDE_FEATURE =
Constants.XERCES_FEATURE_PREFIX + Constants.XINCLUDE_FEATURE;
/** Property identifier: security manager. */
private static final String SECURITY_MANAGER =
Constants.XERCES_PROPERTY_PREFIX + Constants.SECURITY_MANAGER_PROPERTY;
private final JAXPSAXParser xmlReader;
private String schemaLanguage = null; // null means DTD
private final Schema grammar;
private final XMLComponent fSchemaValidator;
private final XMLComponentManager fSchemaValidatorComponentManager;
private final ValidationManager fSchemaValidationManager;
private final UnparsedEntityHandler fUnparsedEntityHandler;
/** Initial ErrorHandler */
private final ErrorHandler fInitErrorHandler;
/** Initial EntityResolver */
private final EntityResolver fInitEntityResolver;
/**
* Create a SAX parser with the associated features
* @param features Hashtable of SAX features, may be null
*/
SAXParserImpl(SAXParserFactoryImpl spf, Hashtable features)
throws SAXException {
this(spf, features, false);
}
/**
* Create a SAX parser with the associated features
* @param features Hashtable of SAX features, may be null
*/
SAXParserImpl(SAXParserFactoryImpl spf, Hashtable features, boolean secureProcessing)
throws SAXException
{
// Instantiate a SAXParser directly and not through SAX so that we use the right ClassLoader
xmlReader = new JAXPSAXParser(this);
// JAXP "namespaceAware" == SAX Namespaces feature
// Note: there is a compatibility problem here with default values:
// JAXP default is false while SAX 2 default is true!
xmlReader.setFeature0(NAMESPACES_FEATURE, spf.isNamespaceAware());
// SAX "namespaces" and "namespace-prefixes" features should not
// both be false. We make them opposite for backward compatibility
// since JAXP 1.0 apps may want to receive xmlns* attributes.
xmlReader.setFeature0(NAMESPACE_PREFIXES_FEATURE, !spf.isNamespaceAware());
// Avoid setting the XInclude processing feature if the value is false.
// This will keep the configuration from throwing an exception if it
// does not support XInclude.
if (spf.isXIncludeAware()) {
xmlReader.setFeature0(XINCLUDE_FEATURE, true);
}
// If the secure processing feature is on set a security manager.
if (secureProcessing) {
xmlReader.setProperty0(SECURITY_MANAGER, new SecurityManager());
}
// Set application's features, followed by validation features.
setFeatures(features);
// If validating, provide a default ErrorHandler that prints
// validation errors with a warning telling the user to set an
// ErrorHandler.
if (spf.isValidating()) {
fInitErrorHandler = new DefaultValidationErrorHandler();
xmlReader.setErrorHandler(fInitErrorHandler);
}
else {
fInitErrorHandler = xmlReader.getErrorHandler();
}
xmlReader.setFeature0(VALIDATION_FEATURE, spf.isValidating());
// Get the Schema object from the factory
this.grammar = spf.getSchema();
if (grammar != null) {
XMLParserConfiguration config = xmlReader.getXMLParserConfiguration();
XMLComponent validatorComponent = null;
/** For Xerces grammars, use built-in schema validator. **/
if (grammar instanceof XSGrammarPoolContainer) {
validatorComponent = new XMLSchemaValidator();
fSchemaValidationManager = new ValidationManager();
fUnparsedEntityHandler = new UnparsedEntityHandler(fSchemaValidationManager);
config.setDTDHandler(fUnparsedEntityHandler);
fUnparsedEntityHandler.setDTDHandler(xmlReader);
xmlReader.setDTDSource(fUnparsedEntityHandler);
fSchemaValidatorComponentManager = new SchemaValidatorConfiguration(config,
(XSGrammarPoolContainer) grammar, fSchemaValidationManager);
}
/** For third party grammars, use the JAXP validator component. **/
else {
validatorComponent = new JAXPValidatorComponent(grammar.newValidatorHandler());
fSchemaValidationManager = null;
fUnparsedEntityHandler = null;
fSchemaValidatorComponentManager = config;
}
config.addRecognizedFeatures(validatorComponent.getRecognizedFeatures());
config.addRecognizedProperties(validatorComponent.getRecognizedProperties());
config.setDocumentHandler((XMLDocumentHandler) validatorComponent);
((XMLDocumentSource)validatorComponent).setDocumentHandler(xmlReader);
xmlReader.setDocumentSource((XMLDocumentSource) validatorComponent);
fSchemaValidator = validatorComponent;
}
else {
fSchemaValidationManager = null;
fUnparsedEntityHandler = null;
fSchemaValidatorComponentManager = null;
fSchemaValidator = null;
}
// Initial EntityResolver
fInitEntityResolver = xmlReader.getEntityResolver();
}
/**
* Set any features of our XMLReader based on any features set on the
* SAXParserFactory.
*
* XXX Does not handle possible conflicts between SAX feature names and
* JAXP specific feature names, eg. SAXParserFactory.isValidating()
*/
private void setFeatures(Hashtable features)
throws SAXNotSupportedException, SAXNotRecognizedException {
if (features != null) {
Iterator entries = features.entrySet().iterator();
while (entries.hasNext()) {
Map.Entry entry = (Map.Entry) entries.next();
String feature = (String) entry.getKey();
boolean value = ((Boolean) entry.getValue()).booleanValue();
xmlReader.setFeature0(feature, value);
}
}
}
public Parser getParser() throws SAXException {
// Xerces2 AbstractSAXParser implements SAX1 Parser
// assert(xmlReader instanceof Parser);
return (Parser) xmlReader;
}
/**
* Returns the XMLReader that is encapsulated by the implementation of
* this class.
*/
public XMLReader getXMLReader() {
return xmlReader;
}
public boolean isNamespaceAware() {
try {
return xmlReader.getFeature(NAMESPACES_FEATURE);
}
catch (SAXException x) {
throw new IllegalStateException(x.getMessage());
}
}
public boolean isValidating() {
try {
return xmlReader.getFeature(VALIDATION_FEATURE);
}
catch (SAXException x) {
throw new IllegalStateException(x.getMessage());
}
}
/**
* Gets the XInclude processing mode for this parser
* @return the state of XInclude processing mode
*/
public boolean isXIncludeAware() {
try {
return xmlReader.getFeature(XINCLUDE_FEATURE);
}
catch (SAXException exc) {
return false;
}
}
/**
* Sets the particular property in the underlying implementation of
* org.xml.sax.XMLReader.
*/
public void setProperty(String name, Object value)
throws SAXNotRecognizedException, SAXNotSupportedException {
xmlReader.setProperty(name, value);
}
/**
* returns the particular property requested for in the underlying
* implementation of org.xml.sax.XMLReader.
*/
public Object getProperty(String name)
throws SAXNotRecognizedException, SAXNotSupportedException {
return xmlReader.getProperty(name);
}
public void parse(InputSource is, DefaultHandler dh)
throws SAXException, IOException {
if (is == null) {
throw new IllegalArgumentException();
}
if (dh != null) {
xmlReader.setContentHandler(dh);
xmlReader.setEntityResolver(dh);
xmlReader.setErrorHandler(dh);
xmlReader.setDTDHandler(dh);
xmlReader.setDocumentHandler(null);
}
xmlReader.parse(is);
}
public void parse(InputSource is, HandlerBase hb)
throws SAXException, IOException {
if (is == null) {
throw new IllegalArgumentException();
}
if (hb != null) {
xmlReader.setDocumentHandler(hb);
xmlReader.setEntityResolver(hb);
xmlReader.setErrorHandler(hb);
xmlReader.setDTDHandler(hb);
xmlReader.setContentHandler(null);
}
xmlReader.parse(is);
}
public Schema getSchema() {
return grammar;
}
public void reset() {
try {
/** Restore initial values of features and properties. **/
xmlReader.restoreInitState();
}
catch (SAXException exc) {
// This should never happen. We only store recognized
// features and properties in the hash maps. For now
// just ignore it.
}
/** Restore various handlers. **/
xmlReader.setContentHandler(null);
xmlReader.setDTDHandler(null);
if (xmlReader.getErrorHandler() != fInitErrorHandler) {
xmlReader.setErrorHandler(fInitErrorHandler);
}
if (xmlReader.getEntityResolver() != fInitEntityResolver) {
xmlReader.setEntityResolver(fInitEntityResolver);
}
}
/*
* PSVIProvider methods
*/
public ElementPSVI getElementPSVI() {
return ((PSVIProvider)xmlReader).getElementPSVI();
}
public AttributePSVI getAttributePSVI(int index) {
return ((PSVIProvider)xmlReader).getAttributePSVI(index);
}
public AttributePSVI getAttributePSVIByName(String uri, String localname) {
return ((PSVIProvider)xmlReader).getAttributePSVIByName(uri, localname);
}
/**
* Extension of SAXParser. This class tracks changes to
* features and properties to allow the parser to be reset to
* its initial state.
*/
public static class JAXPSAXParser extends org.apache.xerces.parsers.SAXParser {
private final HashMap fInitFeatures = new HashMap();
private final HashMap fInitProperties = new HashMap();
private final SAXParserImpl fSAXParser;
public JAXPSAXParser() {
this(null);
}
JAXPSAXParser(SAXParserImpl saxParser) {
super();
fSAXParser = saxParser;
}
/**
* Override SAXParser's setFeature method to track the initial state
* of features. This keeps us from affecting the performance of the
* SAXParser when it is created with XMLReaderFactory.
*/
public synchronized void setFeature(String name, boolean value)
throws SAXNotRecognizedException, SAXNotSupportedException {
if (name == null) {
// TODO: Add localized error message.
throw new NullPointerException();
}
if (name.equals(XMLConstants.FEATURE_SECURE_PROCESSING)) {
try {
setProperty(SECURITY_MANAGER, value ? new SecurityManager() : null);
}
catch (SAXNotRecognizedException exc) {
// If the property is not supported
// re-throw the exception if the value is true.
if (value) {
throw exc;
}
}
catch (SAXNotSupportedException exc) {
// If the property is not supported
// re-throw the exception if the value is true.
if (value) {
throw exc;
}
}
return;
}
if (!fInitFeatures.containsKey(name)) {
boolean current = super.getFeature(name);
fInitFeatures.put(name, current ? Boolean.TRUE : Boolean.FALSE);
}
/** Forward feature to the schema validator if there is one. **/
if (fSAXParser != null && fSAXParser.fSchemaValidator != null) {
setSchemaValidatorFeature(name, value);
}
super.setFeature(name, value);
}
public synchronized boolean getFeature(String name)
throws SAXNotRecognizedException, SAXNotSupportedException {
if (name == null) {
// TODO: Add localized error message.
throw new NullPointerException();
}
if (name.equals(XMLConstants.FEATURE_SECURE_PROCESSING)) {
try {
return (super.getProperty(SECURITY_MANAGER) != null);
}
// If the property is not supported the value must be false.
catch (SAXException exc) {
return false;
}
}
return super.getFeature(name);
}
/**
* Override SAXParser's setProperty method to track the initial state
* of properties. This keeps us from affecting the performance of the
* SAXParser when it is created with XMLReaderFactory.
*/
public synchronized void setProperty(String name, Object value)
throws SAXNotRecognizedException, SAXNotSupportedException {
if (name == null) {
// TODO: Add localized error message.
throw new NullPointerException();
}
if (fSAXParser != null) {
// JAXP 1.2 support
if (JAXP_SCHEMA_LANGUAGE.equals(name)) {
// The spec says if a schema is given via SAXParserFactory
// the JAXP 1.2 properties shouldn't be allowed.
if (fSAXParser.grammar != null) {
throw new SAXNotSupportedException(
SAXMessageFormatter.formatMessage(fConfiguration.getLocale(), "schema-already-specified", new Object[] {name}));
}
if ( W3C_XML_SCHEMA.equals(value) ) {
//None of the properties will take effect till the setValidating(true) has been called
if( fSAXParser.isValidating() ) {
fSAXParser.schemaLanguage = W3C_XML_SCHEMA;
setFeature(XMLSCHEMA_VALIDATION_FEATURE, true);
// this will allow the parser not to emit DTD-related
// errors, as the spec demands
if (!fInitProperties.containsKey(JAXP_SCHEMA_LANGUAGE)) {
fInitProperties.put(JAXP_SCHEMA_LANGUAGE, super.getProperty(JAXP_SCHEMA_LANGUAGE));
}
super.setProperty(JAXP_SCHEMA_LANGUAGE, W3C_XML_SCHEMA);
}
}
else if (value == null) {
fSAXParser.schemaLanguage = null;
setFeature(XMLSCHEMA_VALIDATION_FEATURE, false);
}
else {
// REVISIT: It would be nice if we could format this message
// using a user specified locale as we do in the underlying
// XMLReader -- mrglavas
throw new SAXNotSupportedException(
SAXMessageFormatter.formatMessage(fConfiguration.getLocale(), "schema-not-supported", null));
}
return;
}
else if (JAXP_SCHEMA_SOURCE.equals(name)) {
// The spec says if a schema is given via SAXParserFactory
// the JAXP 1.2 properties shouldn't be allowed.
if (fSAXParser.grammar != null) {
throw new SAXNotSupportedException(
SAXMessageFormatter.formatMessage(fConfiguration.getLocale(), "schema-already-specified", new Object[] {name}));
}
String val = (String)getProperty(JAXP_SCHEMA_LANGUAGE);
if ( val != null && W3C_XML_SCHEMA.equals(val) ) {
if (!fInitProperties.containsKey(JAXP_SCHEMA_SOURCE)) {
fInitProperties.put(JAXP_SCHEMA_SOURCE, super.getProperty(JAXP_SCHEMA_SOURCE));
}
super.setProperty(name, value);
}
else {
throw new SAXNotSupportedException(
SAXMessageFormatter.formatMessage(fConfiguration.getLocale(),
"jaxp-order-not-supported",
new Object[] {JAXP_SCHEMA_LANGUAGE, JAXP_SCHEMA_SOURCE}));
}
return;
}
}
if (!fInitProperties.containsKey(name)) {
fInitProperties.put(name, super.getProperty(name));
}
/** Forward property to the schema validator if there is one. **/
if (fSAXParser != null && fSAXParser.fSchemaValidator != null) {
setSchemaValidatorProperty(name, value);
}
super.setProperty(name, value);
}
public synchronized Object getProperty(String name)
throws SAXNotRecognizedException, SAXNotSupportedException {
if (name == null) {
// TODO: Add localized error message.
throw new NullPointerException();
}
if (fSAXParser != null && JAXP_SCHEMA_LANGUAGE.equals(name)) {
// JAXP 1.2 support
return fSAXParser.schemaLanguage;
}
return super.getProperty(name);
}
synchronized void restoreInitState()
throws SAXNotRecognizedException, SAXNotSupportedException {
Iterator iter;
if (!fInitFeatures.isEmpty()) {
iter = fInitFeatures.entrySet().iterator();
while (iter.hasNext()) {
Map.Entry entry = (Map.Entry) iter.next();
String name = (String) entry.getKey();
boolean value = ((Boolean) entry.getValue()).booleanValue();
super.setFeature(name, value);
}
fInitFeatures.clear();
}
if (!fInitProperties.isEmpty()) {
iter = fInitProperties.entrySet().iterator();
while (iter.hasNext()) {
Map.Entry entry = (Map.Entry) iter.next();
String name = (String) entry.getKey();
Object value = entry.getValue();
super.setProperty(name, value);
}
fInitProperties.clear();
}
}
public void parse(InputSource inputSource)
throws SAXException, IOException {
if (fSAXParser != null && fSAXParser.fSchemaValidator != null) {
if (fSAXParser.fSchemaValidationManager != null) {
fSAXParser.fSchemaValidationManager.reset();
fSAXParser.fUnparsedEntityHandler.reset();
}
resetSchemaValidator();
}
super.parse(inputSource);
}
public void parse(String systemId)
throws SAXException, IOException {
if (fSAXParser != null && fSAXParser.fSchemaValidator != null) {
if (fSAXParser.fSchemaValidationManager != null) {
fSAXParser.fSchemaValidationManager.reset();
fSAXParser.fUnparsedEntityHandler.reset();
}
resetSchemaValidator();
}
super.parse(systemId);
}
XMLParserConfiguration getXMLParserConfiguration() {
return fConfiguration;
}
void setFeature0(String name, boolean value)
throws SAXNotRecognizedException, SAXNotSupportedException {
super.setFeature(name, value);
}
boolean getFeature0(String name)
throws SAXNotRecognizedException, SAXNotSupportedException {
return super.getFeature(name);
}
void setProperty0(String name, Object value)
throws SAXNotRecognizedException, SAXNotSupportedException {
super.setProperty(name, value);
}
Object getProperty0(String name)
throws SAXNotRecognizedException, SAXNotSupportedException {
return super.getProperty(name);
}
private void setSchemaValidatorFeature(String name, boolean value)
throws SAXNotRecognizedException, SAXNotSupportedException {
try {
fSAXParser.fSchemaValidator.setFeature(name, value);
}
// This should never be thrown from the schema validator.
catch (XMLConfigurationException e) {
String identifier = e.getIdentifier();
if (e.getType() == XMLConfigurationException.NOT_RECOGNIZED) {
throw new SAXNotRecognizedException(
SAXMessageFormatter.formatMessage(fConfiguration.getLocale(),
"feature-not-recognized", new Object [] {identifier}));
}
else {
throw new SAXNotSupportedException(
SAXMessageFormatter.formatMessage(fConfiguration.getLocale(),
"feature-not-supported", new Object [] {identifier}));
}
}
}
private void setSchemaValidatorProperty(String name, Object value)
throws SAXNotRecognizedException, SAXNotSupportedException {
try {
fSAXParser.fSchemaValidator.setProperty(name, value);
}
// This should never be thrown from the schema validator.
catch (XMLConfigurationException e) {
String identifier = e.getIdentifier();
if (e.getType() == XMLConfigurationException.NOT_RECOGNIZED) {
throw new SAXNotRecognizedException(
SAXMessageFormatter.formatMessage(fConfiguration.getLocale(),
"property-not-recognized", new Object [] {identifier}));
}
else {
throw new SAXNotSupportedException(
SAXMessageFormatter.formatMessage(fConfiguration.getLocale(),
"property-not-supported", new Object [] {identifier}));
}
}
}
private void resetSchemaValidator() throws SAXException {
try {
fSAXParser.fSchemaValidator.reset(fSAXParser.fSchemaValidatorComponentManager);
}
// This should never be thrown from the schema validator.
catch (XMLConfigurationException e) {
throw new SAXException(e);
}
}
}
}