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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.
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package org.apache.xerces.parsers;

import java.io.IOException;
import java.util.Locale;

import org.apache.xerces.impl.Constants;
import org.apache.xerces.impl.XMLDTDScannerImpl;
import org.apache.xerces.impl.XMLDocumentScannerImpl;
import org.apache.xerces.impl.XMLEntityManager;
import org.apache.xerces.impl.XMLErrorReporter;
import org.apache.xerces.impl.XMLNSDocumentScannerImpl;
import org.apache.xerces.impl.dv.DTDDVFactory;
import org.apache.xerces.impl.msg.XMLMessageFormatter;
import org.apache.xerces.impl.validation.ValidationManager;
import org.apache.xerces.util.SymbolTable;
import org.apache.xerces.xni.XMLLocator;
import org.apache.xerces.xni.XNIException;
import org.apache.xerces.xni.grammars.XMLGrammarPool;
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.XMLDTDScanner;
import org.apache.xerces.xni.parser.XMLDocumentScanner;
import org.apache.xerces.xni.parser.XMLInputSource;
import org.apache.xerces.xni.parser.XMLPullParserConfiguration;

/**
 * This is the non validating parser configuration. It extends the basic
 * configuration with the set of following parser components:
 * Document scanner, DTD scanner, namespace binder, document handler.
 * 

* Xerces parser that uses this configuration is not conformant * non-validating XML processor, since conformant non-validating processor is required * to process "all the declarations they read in the internal DTD subset ... must use the information in those declarations to normalize attribute values, * include the replacement text of internal entities, and supply default attribute values". * * @author Elena Litani, IBM * @version $Id: NonValidatingConfiguration.java 713638 2008-11-13 04:42:18Z mrglavas $ */ public class NonValidatingConfiguration extends BasicParserConfiguration implements XMLPullParserConfiguration { // // Constants // // feature identifiers /** Feature identifier: warn on duplicate attribute definition. */ protected static final String WARN_ON_DUPLICATE_ATTDEF = Constants.XERCES_FEATURE_PREFIX + Constants.WARN_ON_DUPLICATE_ATTDEF_FEATURE; /** Feature identifier: warn on duplicate entity definition. */ protected static final String WARN_ON_DUPLICATE_ENTITYDEF = Constants.XERCES_FEATURE_PREFIX + Constants.WARN_ON_DUPLICATE_ENTITYDEF_FEATURE; /** Feature identifier: warn on undeclared element definition. */ protected static final String WARN_ON_UNDECLARED_ELEMDEF = Constants.XERCES_FEATURE_PREFIX + Constants.WARN_ON_UNDECLARED_ELEMDEF_FEATURE; /** Feature identifier: allow Java encodings. */ protected static final String ALLOW_JAVA_ENCODINGS = Constants.XERCES_FEATURE_PREFIX + Constants.ALLOW_JAVA_ENCODINGS_FEATURE; /** Feature identifier: continue after fatal error. */ protected static final String CONTINUE_AFTER_FATAL_ERROR = Constants.XERCES_FEATURE_PREFIX + Constants.CONTINUE_AFTER_FATAL_ERROR_FEATURE; /** Feature identifier: load external DTD. */ protected static final String LOAD_EXTERNAL_DTD = Constants.XERCES_FEATURE_PREFIX + Constants.LOAD_EXTERNAL_DTD_FEATURE; /** Feature identifier: notify built-in refereces. */ protected static final String NOTIFY_BUILTIN_REFS = Constants.XERCES_FEATURE_PREFIX + Constants.NOTIFY_BUILTIN_REFS_FEATURE; /** Feature identifier: notify character refereces. */ protected static final String NOTIFY_CHAR_REFS = Constants.XERCES_FEATURE_PREFIX + Constants.NOTIFY_CHAR_REFS_FEATURE; /** Feature identifier: expose schema normalized value */ protected static final String NORMALIZE_DATA = Constants.XERCES_FEATURE_PREFIX + Constants.SCHEMA_NORMALIZED_VALUE; /** Feature identifier: send element default value via characters() */ protected static final String SCHEMA_ELEMENT_DEFAULT = Constants.XERCES_FEATURE_PREFIX + Constants.SCHEMA_ELEMENT_DEFAULT; // property identifiers /** Property identifier: error reporter. */ protected static final String ERROR_REPORTER = Constants.XERCES_PROPERTY_PREFIX + Constants.ERROR_REPORTER_PROPERTY; /** Property identifier: entity manager. */ protected static final String ENTITY_MANAGER = Constants.XERCES_PROPERTY_PREFIX + Constants.ENTITY_MANAGER_PROPERTY; /** Property identifier document scanner: */ protected static final String DOCUMENT_SCANNER = Constants.XERCES_PROPERTY_PREFIX + Constants.DOCUMENT_SCANNER_PROPERTY; /** Property identifier: DTD scanner. */ protected static final String DTD_SCANNER = Constants.XERCES_PROPERTY_PREFIX + Constants.DTD_SCANNER_PROPERTY; /** Property identifier: grammar pool. */ protected static final String XMLGRAMMAR_POOL = Constants.XERCES_PROPERTY_PREFIX + Constants.XMLGRAMMAR_POOL_PROPERTY; /** Property identifier: DTD validator. */ protected static final String DTD_VALIDATOR = Constants.XERCES_PROPERTY_PREFIX + Constants.DTD_VALIDATOR_PROPERTY; /** Property identifier: namespace binder. */ protected static final String NAMESPACE_BINDER = Constants.XERCES_PROPERTY_PREFIX + Constants.NAMESPACE_BINDER_PROPERTY; /** Property identifier: datatype validator factory. */ protected static final String DATATYPE_VALIDATOR_FACTORY = Constants.XERCES_PROPERTY_PREFIX + Constants.DATATYPE_VALIDATOR_FACTORY_PROPERTY; protected static final String VALIDATION_MANAGER = Constants.XERCES_PROPERTY_PREFIX + Constants.VALIDATION_MANAGER_PROPERTY; /** Property identifier: XML Schema validator. */ protected static final String SCHEMA_VALIDATOR = Constants.XERCES_PROPERTY_PREFIX + Constants.SCHEMA_VALIDATOR_PROPERTY; /** Property identifier: locale. */ protected static final String LOCALE = Constants.XERCES_PROPERTY_PREFIX + Constants.LOCALE_PROPERTY; // debugging /** Set to true and recompile to print exception stack trace. */ private static final boolean PRINT_EXCEPTION_STACK_TRACE = false; // // Data // // components (non-configurable) /** Grammar pool. */ protected XMLGrammarPool fGrammarPool; /** Datatype validator factory. */ protected DTDDVFactory fDatatypeValidatorFactory; // components (configurable) /** Error reporter. */ protected XMLErrorReporter fErrorReporter; /** Entity manager. */ protected XMLEntityManager fEntityManager; /** Document scanner. */ protected XMLDocumentScanner fScanner; /** Input Source */ protected XMLInputSource fInputSource; /** DTD scanner. */ protected XMLDTDScanner fDTDScanner; protected ValidationManager fValidationManager; // private data /** Document scanner that does namespace binding. */ private XMLNSDocumentScannerImpl fNamespaceScanner; /** Default Xerces implementation of scanner*/ private XMLDocumentScannerImpl fNonNSScanner; /** fConfigUpdated is set to true if there has been any change to the configuration settings, * i.e a feature or a property was changed. */ protected boolean fConfigUpdated = false; // state /** Locator */ protected XMLLocator fLocator; /** * True if a parse is in progress. This state is needed because * some features/properties cannot be set while parsing (e.g. * validation and namespaces). */ protected boolean fParseInProgress = false; // // Constructors // /** Default constructor. */ public NonValidatingConfiguration() { this(null, null, null); } // () /** * Constructs a parser configuration using the specified symbol table. * * @param symbolTable The symbol table to use. */ public NonValidatingConfiguration(SymbolTable symbolTable) { this(symbolTable, null, null); } // (SymbolTable) /** * Constructs a parser configuration using the specified symbol table and * grammar pool. *

* REVISIT: * Grammar pool will be updated when the new validation engine is * implemented. * * @param symbolTable The symbol table to use. * @param grammarPool The grammar pool to use. */ public NonValidatingConfiguration(SymbolTable symbolTable, XMLGrammarPool grammarPool) { this(symbolTable, grammarPool, null); } // (SymbolTable,XMLGrammarPool) /** * Constructs a parser configuration using the specified symbol table, * grammar pool, and parent settings. *

* REVISIT: * Grammar pool will be updated when the new validation engine is * implemented. * * @param symbolTable The symbol table to use. * @param grammarPool The grammar pool to use. * @param parentSettings The parent settings. */ public NonValidatingConfiguration(SymbolTable symbolTable, XMLGrammarPool grammarPool, XMLComponentManager parentSettings) { super(symbolTable, parentSettings); // add default recognized features final String[] recognizedFeatures = { PARSER_SETTINGS, NAMESPACES, //WARN_ON_DUPLICATE_ATTDEF, // from XMLDTDScannerImpl //WARN_ON_UNDECLARED_ELEMDEF, // from XMLDTDScannerImpl //ALLOW_JAVA_ENCODINGS, // from XMLEntityManager CONTINUE_AFTER_FATAL_ERROR, //LOAD_EXTERNAL_DTD, // from XMLDTDScannerImpl //NOTIFY_BUILTIN_REFS, // from XMLDocumentFragmentScannerImpl //NOTIFY_CHAR_REFS, // from XMLDocumentFragmentScannerImpl //WARN_ON_DUPLICATE_ENTITYDEF // from XMLEntityManager }; addRecognizedFeatures(recognizedFeatures); // set state for default features //setFeature(WARN_ON_DUPLICATE_ATTDEF, false); // from XMLDTDScannerImpl //setFeature(WARN_ON_UNDECLARED_ELEMDEF, false); // from XMLDTDScannerImpl //setFeature(ALLOW_JAVA_ENCODINGS, false); // from XMLEntityManager fFeatures.put(CONTINUE_AFTER_FATAL_ERROR, Boolean.FALSE); fFeatures.put(PARSER_SETTINGS, Boolean.TRUE); fFeatures.put(NAMESPACES, Boolean.TRUE); //setFeature(LOAD_EXTERNAL_DTD, true); // from XMLDTDScannerImpl //setFeature(NOTIFY_BUILTIN_REFS, false); // from XMLDocumentFragmentScannerImpl //setFeature(NOTIFY_CHAR_REFS, false); // from XMLDocumentFragmentScannerImpl //setFeature(WARN_ON_DUPLICATE_ENTITYDEF, false); // from XMLEntityManager // add default recognized properties final String[] recognizedProperties = { ERROR_REPORTER, ENTITY_MANAGER, DOCUMENT_SCANNER, DTD_SCANNER, DTD_VALIDATOR, NAMESPACE_BINDER, XMLGRAMMAR_POOL, DATATYPE_VALIDATOR_FACTORY, VALIDATION_MANAGER, LOCALE }; addRecognizedProperties(recognizedProperties); fGrammarPool = grammarPool; if(fGrammarPool != null){ fProperties.put(XMLGRAMMAR_POOL, fGrammarPool); } fEntityManager = createEntityManager(); fProperties.put(ENTITY_MANAGER, fEntityManager); addComponent(fEntityManager); fErrorReporter = createErrorReporter(); fErrorReporter.setDocumentLocator(fEntityManager.getEntityScanner()); fProperties.put(ERROR_REPORTER, fErrorReporter); addComponent(fErrorReporter); // this configuration delays creation of the scanner // till it is known if namespace processing should be performed fDTDScanner = createDTDScanner(); if (fDTDScanner != null) { fProperties.put(DTD_SCANNER, fDTDScanner); if (fDTDScanner instanceof XMLComponent) { addComponent((XMLComponent)fDTDScanner); } } fDatatypeValidatorFactory = createDatatypeValidatorFactory(); if (fDatatypeValidatorFactory != null) { fProperties.put(DATATYPE_VALIDATOR_FACTORY, fDatatypeValidatorFactory); } fValidationManager = createValidationManager(); if (fValidationManager != null) { fProperties.put(VALIDATION_MANAGER, fValidationManager); } // add message formatters if (fErrorReporter.getMessageFormatter(XMLMessageFormatter.XML_DOMAIN) == null) { XMLMessageFormatter xmft = new XMLMessageFormatter(); fErrorReporter.putMessageFormatter(XMLMessageFormatter.XML_DOMAIN, xmft); fErrorReporter.putMessageFormatter(XMLMessageFormatter.XMLNS_DOMAIN, xmft); } fConfigUpdated = false; // set locale try { setLocale(Locale.getDefault()); } catch (XNIException e) { // do nothing // REVISIT: What is the right thing to do? -Ac } } // (SymbolTable,XMLGrammarPool) // // Public methods // public void setFeature(String featureId, boolean state) throws XMLConfigurationException { fConfigUpdated = true; super.setFeature(featureId, state); } public Object getProperty(String propertyId) throws XMLConfigurationException { if (LOCALE.equals(propertyId)) { return getLocale(); } return super.getProperty(propertyId); } public void setProperty(String propertyId, Object value) throws XMLConfigurationException { fConfigUpdated = true; if (LOCALE.equals(propertyId)) { setLocale((Locale) value); } super.setProperty(propertyId, value); } /** * Set the locale to use for messages. * * @param locale The locale object to use for localization of messages. * * @exception XNIException Thrown if the parser does not support the * specified locale. */ public void setLocale(Locale locale) throws XNIException { super.setLocale(locale); fErrorReporter.setLocale(locale); } // setLocale(Locale) public boolean getFeature(String featureId) throws XMLConfigurationException { // make this feature special if (featureId.equals(PARSER_SETTINGS)){ return fConfigUpdated; } return super.getFeature(featureId); } // getFeature(String):boolean // // XMLPullParserConfiguration methods // // parsing /** * Sets the input source for the document to parse. * * @param inputSource The document's input source. * * @exception XMLConfigurationException Thrown if there is a * configuration error when initializing the * parser. * @exception IOException Thrown on I/O error. * * @see #parse(boolean) */ public void setInputSource(XMLInputSource inputSource) throws XMLConfigurationException, IOException { // REVISIT: this method used to reset all the components and // construct the pipeline. Now reset() is called // in parse (boolean) just before we parse the document // Should this method still throw exceptions..? fInputSource = inputSource; } // setInputSource(XMLInputSource) /** * Parses the document in a pull parsing fashion. * * @param complete True if the pull parser should parse the * remaining document completely. * * @return True if there is more document to parse. * * @exception XNIException Any XNI exception, possibly wrapping * another exception. * @exception IOException An IO exception from the parser, possibly * from a byte stream or character stream * supplied by the parser. * * @see #setInputSource */ public boolean parse(boolean complete) throws XNIException, IOException { // // reset and configure pipeline and set InputSource. if (fInputSource !=null) { try { // resets and sets the pipeline. reset(); fScanner.setInputSource(fInputSource); fInputSource = null; } catch (XNIException ex) { if (PRINT_EXCEPTION_STACK_TRACE) ex.printStackTrace(); throw ex; } catch (IOException ex) { if (PRINT_EXCEPTION_STACK_TRACE) ex.printStackTrace(); throw ex; } catch (RuntimeException ex) { if (PRINT_EXCEPTION_STACK_TRACE) ex.printStackTrace(); throw ex; } catch (Exception ex) { if (PRINT_EXCEPTION_STACK_TRACE) ex.printStackTrace(); throw new XNIException(ex); } } try { return fScanner.scanDocument(complete); } catch (XNIException ex) { if (PRINT_EXCEPTION_STACK_TRACE) ex.printStackTrace(); throw ex; } catch (IOException ex) { if (PRINT_EXCEPTION_STACK_TRACE) ex.printStackTrace(); throw ex; } catch (RuntimeException ex) { if (PRINT_EXCEPTION_STACK_TRACE) ex.printStackTrace(); throw ex; } catch (Exception ex) { if (PRINT_EXCEPTION_STACK_TRACE) ex.printStackTrace(); throw new XNIException(ex); } } // parse(boolean):boolean /** * If the application decides to terminate parsing before the xml document * is fully parsed, the application should call this method to free any * resource allocated during parsing. For example, close all opened streams. */ public void cleanup() { fEntityManager.closeReaders(); } // // XMLParserConfiguration methods // /** * Parses the specified input source. * * @param source The input source. * * @exception XNIException Throws exception on XNI error. * @exception java.io.IOException Throws exception on i/o error. */ public void parse(XMLInputSource source) throws XNIException, IOException { if (fParseInProgress) { // REVISIT - need to add new error message throw new XNIException("FWK005 parse may not be called while parsing."); } fParseInProgress = true; try { setInputSource(source); parse(true); } catch (XNIException ex) { if (PRINT_EXCEPTION_STACK_TRACE) ex.printStackTrace(); throw ex; } catch (IOException ex) { if (PRINT_EXCEPTION_STACK_TRACE) ex.printStackTrace(); throw ex; } catch (RuntimeException ex) { if (PRINT_EXCEPTION_STACK_TRACE) ex.printStackTrace(); throw ex; } catch (Exception ex) { if (PRINT_EXCEPTION_STACK_TRACE) ex.printStackTrace(); throw new XNIException(ex); } finally { fParseInProgress = false; // close all streams opened by xerces this.cleanup(); } } // parse(InputSource) // // Protected methods // /** * Reset all components before parsing. * * @throws XNIException Thrown if an error occurs during initialization. */ protected void reset() throws XNIException { if (fValidationManager != null) fValidationManager.reset(); // configure the pipeline and initialize the components configurePipeline(); super.reset(); } // reset() /** Configures the pipeline. */ protected void configurePipeline() { // create appropriate scanner // and register it as one of the components. if (fFeatures.get(NAMESPACES) == Boolean.TRUE) { if (fNamespaceScanner == null) { fNamespaceScanner = new XMLNSDocumentScannerImpl(); addComponent((XMLComponent)fNamespaceScanner); } fProperties.put(DOCUMENT_SCANNER, fNamespaceScanner); fNamespaceScanner.setDTDValidator(null); fScanner = fNamespaceScanner; } else { if (fNonNSScanner == null) { fNonNSScanner = new XMLDocumentScannerImpl(); addComponent((XMLComponent)fNonNSScanner); } fProperties.put(DOCUMENT_SCANNER, fNonNSScanner); fScanner = fNonNSScanner; } fScanner.setDocumentHandler(fDocumentHandler); fLastComponent = fScanner; // setup dtd pipeline if (fDTDScanner != null) { fDTDScanner.setDTDHandler(fDTDHandler); fDTDScanner.setDTDContentModelHandler(fDTDContentModelHandler); } } // configurePipeline() // features and properties /** * Check a feature. If feature is know and supported, this method simply * returns. Otherwise, the appropriate exception is thrown. * * @param featureId The unique identifier (URI) of the feature. * * @throws XMLConfigurationException Thrown for configuration error. * In general, components should * only throw this exception if * it is really * a critical error. */ protected void checkFeature(String featureId) throws XMLConfigurationException { // // Xerces Features // if (featureId.startsWith(Constants.XERCES_FEATURE_PREFIX)) { final int suffixLength = featureId.length() - Constants.XERCES_FEATURE_PREFIX.length(); // // http://apache.org/xml/features/validation/dynamic // Allows the parser to validate a document only when it // contains a grammar. Validation is turned on/off based // on each document instance, automatically. // if (suffixLength == Constants.DYNAMIC_VALIDATION_FEATURE.length() && featureId.endsWith(Constants.DYNAMIC_VALIDATION_FEATURE)) { return; } // // http://apache.org/xml/features/validation/default-attribute-values // if (suffixLength == Constants.DEFAULT_ATTRIBUTE_VALUES_FEATURE.length() && featureId.endsWith(Constants.DEFAULT_ATTRIBUTE_VALUES_FEATURE)) { // REVISIT short type = XMLConfigurationException.NOT_SUPPORTED; throw new XMLConfigurationException(type, featureId); } // // http://apache.org/xml/features/validation/default-attribute-values // if (suffixLength == Constants.VALIDATE_CONTENT_MODELS_FEATURE.length() && featureId.endsWith(Constants.VALIDATE_CONTENT_MODELS_FEATURE)) { // REVISIT short type = XMLConfigurationException.NOT_SUPPORTED; throw new XMLConfigurationException(type, featureId); } // // http://apache.org/xml/features/validation/nonvalidating/load-dtd-grammar // if (suffixLength == Constants.LOAD_DTD_GRAMMAR_FEATURE.length() && featureId.endsWith(Constants.LOAD_DTD_GRAMMAR_FEATURE)) { return; } // // http://apache.org/xml/features/validation/nonvalidating/load-external-dtd // if (suffixLength == Constants.LOAD_EXTERNAL_DTD_FEATURE.length() && featureId.endsWith(Constants.LOAD_EXTERNAL_DTD_FEATURE)) { return; } // // http://apache.org/xml/features/validation/default-attribute-values // if (suffixLength == Constants.VALIDATE_DATATYPES_FEATURE.length() && featureId.endsWith(Constants.VALIDATE_DATATYPES_FEATURE)) { short type = XMLConfigurationException.NOT_SUPPORTED; throw new XMLConfigurationException(type, featureId); } } // // Not recognized // super.checkFeature(featureId); } // checkFeature(String) /** * Check a property. If the property is know and supported, this method * simply returns. Otherwise, the appropriate exception is thrown. * * @param propertyId The unique identifier (URI) of the property * being set. * * @throws XMLConfigurationException Thrown for configuration error. * In general, components should * only throw this exception if * it is really * a critical error. */ protected void checkProperty(String propertyId) throws XMLConfigurationException { // // Xerces Properties // if (propertyId.startsWith(Constants.XERCES_PROPERTY_PREFIX)) { final int suffixLength = propertyId.length() - Constants.XERCES_PROPERTY_PREFIX.length(); if (suffixLength == Constants.DTD_SCANNER_PROPERTY.length() && propertyId.endsWith(Constants.DTD_SCANNER_PROPERTY)) { return; } } if (propertyId.startsWith(Constants.JAXP_PROPERTY_PREFIX)) { final int suffixLength = propertyId.length() - Constants.JAXP_PROPERTY_PREFIX.length(); if (suffixLength == Constants.SCHEMA_SOURCE.length() && propertyId.endsWith(Constants.SCHEMA_SOURCE)) { return; } } // // Not recognized // super.checkProperty(propertyId); } // checkProperty(String) // factory methods /** Creates an entity manager. */ protected XMLEntityManager createEntityManager() { return new XMLEntityManager(); } // createEntityManager():XMLEntityManager /** Creates an error reporter. */ protected XMLErrorReporter createErrorReporter() { return new XMLErrorReporter(); } // createErrorReporter():XMLErrorReporter /** Create a document scanner. */ protected XMLDocumentScanner createDocumentScanner() { return null; } // createDocumentScanner():XMLDocumentScanner /** Create a DTD scanner. */ protected XMLDTDScanner createDTDScanner() { return new XMLDTDScannerImpl(); } // createDTDScanner():XMLDTDScanner /** Create a datatype validator factory. */ protected DTDDVFactory createDatatypeValidatorFactory() { return DTDDVFactory.getInstance(); } // createDatatypeValidatorFactory():DatatypeValidatorFactory protected ValidationManager createValidationManager(){ return new ValidationManager(); } } // class NonValidatingConfiguration





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