src/com/sun/org/apache/xerces/internal/parsers/BasicParserConfiguration.java - platform/external/jetbrains/jdk8u_jaxp - Git at Google

 /*
  * reserved comment block
  * DO NOT REMOVE OR ALTER!
  */
 /*
  * Copyright 2001-2004 The Apache Software Foundation.
  *
  * 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 com.sun.org.apache.xerces.internal.parsers;

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

 import com.sun.org.apache.xerces.internal.impl.Constants;
 import com.sun.org.apache.xerces.internal.util.FeatureState;
 import com.sun.org.apache.xerces.internal.util.ParserConfigurationSettings;
 import com.sun.org.apache.xerces.internal.util.PropertyState;
 import com.sun.org.apache.xerces.internal.util.Status;
 import com.sun.org.apache.xerces.internal.util.SymbolTable;
 import com.sun.org.apache.xerces.internal.xni.XMLDTDContentModelHandler;
 import com.sun.org.apache.xerces.internal.xni.XMLDTDHandler;
 import com.sun.org.apache.xerces.internal.xni.XMLDocumentHandler;
 import com.sun.org.apache.xerces.internal.xni.XNIException;
 import com.sun.org.apache.xerces.internal.xni.parser.XMLComponent;
 import com.sun.org.apache.xerces.internal.xni.parser.XMLComponentManager;
 import com.sun.org.apache.xerces.internal.xni.parser.XMLConfigurationException;
 import com.sun.org.apache.xerces.internal.xni.parser.XMLDocumentSource;
 import com.sun.org.apache.xerces.internal.xni.parser.XMLEntityResolver;
 import com.sun.org.apache.xerces.internal.xni.parser.XMLErrorHandler;
 import com.sun.org.apache.xerces.internal.xni.parser.XMLInputSource;
 import com.sun.org.apache.xerces.internal.xni.parser.XMLParserConfiguration;

 /**
  * A very basic parser configuration. This configuration class can
  * be used as a base class for custom parser configurations. The
  * basic parser configuration creates the symbol table (if not
  * specified at construction time) and manages all of the recognized
  * features and properties.
  * <p>
  * The basic parser configuration does <strong>not</strong> mandate
  * any particular pipeline configuration or the use of specific
  * components except for the symbol table. If even this is too much
  * for a basic parser configuration, the programmer can create a new
  * configuration class that implements the
  * <code>XMLParserConfiguration</code> interface.
  * <p>
  * Subclasses of the basic parser configuration can add their own
  * recognized features and properties by calling the
  * <code>addRecognizedFeature</code> and
  * <code>addRecognizedProperty</code> methods, respectively.
  * <p>
  * The basic parser configuration assumes that the configuration
  * will be made up of various parser components that implement the
  * <code>XMLComponent</code> interface. If subclasses of this
  * configuration create their own components for use in the
  * parser configuration, then each component should be added to
  * the list of components by calling the <code>addComponent</code>
  * method. The basic parser configuration will make sure to call
  * the <code>reset</code> method of each registered component
  * before parsing an instance document.
  * <p>
  * This class recognizes the following features and properties:
  * <ul>
  * <li>Features
  *  <ul>
  *   <li>http://xml.org/sax/features/validation</li>
  *   <li>http://xml.org/sax/features/namespaces</li>
  *   <li>http://xml.org/sax/features/external-general-entities</li>
  *   <li>http://xml.org/sax/features/external-parameter-entities</li>
  *  </ul>
  * <li>Properties
  *  <ul>
  *   <li>http://xml.org/sax/properties/xml-string</li>
  *   <li>http://apache.org/xml/properties/internal/symbol-table</li>
  *   <li>http://apache.org/xml/properties/internal/error-handler</li>
  *   <li>http://apache.org/xml/properties/internal/entity-resolver</li>
  *  </ul>
  * </ul>
  *
  * @author Arnaud  Le Hors, IBM
  * @author Andy Clark, IBM
  *
  * @version $Id: BasicParserConfiguration.java,v 1.6 2010-11-01 04:40:09 joehw Exp $
  */
 public abstract class BasicParserConfiguration
     extends ParserConfigurationSettings
     implements XMLParserConfiguration {

     //
     // Constants
     //

     // feature identifiers

     /** Feature identifier: validation. */
     protected static final String VALIDATION =
         Constants.SAX_FEATURE_PREFIX + Constants.VALIDATION_FEATURE;

     /** Feature identifier: namespaces. */
     protected static final String NAMESPACES =
         Constants.SAX_FEATURE_PREFIX + Constants.NAMESPACES_FEATURE;

     /** Feature identifier: external general entities. */
     protected static final String EXTERNAL_GENERAL_ENTITIES =
         Constants.SAX_FEATURE_PREFIX + Constants.EXTERNAL_GENERAL_ENTITIES_FEATURE;

     /** Feature identifier: external parameter entities. */
     protected static final String EXTERNAL_PARAMETER_ENTITIES =
         Constants.SAX_FEATURE_PREFIX + Constants.EXTERNAL_PARAMETER_ENTITIES_FEATURE;

     // property identifiers

     /** Property identifier: xml string. */
     protected static final String XML_STRING =
         Constants.SAX_PROPERTY_PREFIX + Constants.XML_STRING_PROPERTY;

     /** Property identifier: symbol table. */
     protected static final String SYMBOL_TABLE =
         Constants.XERCES_PROPERTY_PREFIX + Constants.SYMBOL_TABLE_PROPERTY;

     /** Property identifier: error handler. */
     protected static final String ERROR_HANDLER =
         Constants.XERCES_PROPERTY_PREFIX + Constants.ERROR_HANDLER_PROPERTY;

     /** Property identifier: entity resolver. */
     protected static final String ENTITY_RESOLVER =
         Constants.XERCES_PROPERTY_PREFIX + Constants.ENTITY_RESOLVER_PROPERTY;

     //
     // Data
     //

     // components (non-configurable)

     /** Symbol table. */
     protected SymbolTable fSymbolTable;


     // data

     /** Locale. */
     protected Locale fLocale;

     /** Components. */
     protected ArrayList fComponents;

     // handlers

     /** The document handler. */
     protected XMLDocumentHandler fDocumentHandler;

     /** The DTD handler. */
     protected XMLDTDHandler fDTDHandler;

     /** The DTD content model handler. */
     protected XMLDTDContentModelHandler fDTDContentModelHandler;

     /** Last component in the document pipeline */
     protected XMLDocumentSource fLastComponent;

     //
     // Constructors
     //

     /** Default Constructor. */
     protected BasicParserConfiguration() {
         this(null, null);
     } // <init>()

     /**
      * Constructs a parser configuration using the specified symbol table.
      *
      * @param symbolTable The symbol table to use.
      */
     protected BasicParserConfiguration(SymbolTable symbolTable) {
         this(symbolTable, null);
     } // <init>(SymbolTable)

     /**
      * Constructs a parser configuration using the specified symbol table
      * and parent settings.
      *
      * @param symbolTable    The symbol table to use.
      * @param parentSettings The parent settings.
      */
     protected BasicParserConfiguration(SymbolTable symbolTable,
                                        XMLComponentManager parentSettings) {
         super(parentSettings);

         // create a vector to hold all the components in use
         fComponents = new ArrayList();

         // create table for features and properties
         fFeatures = new HashMap();
         fProperties = new HashMap();

         // add default recognized features
         final String[] recognizedFeatures = {
                 PARSER_SETTINGS,
             VALIDATION,
             NAMESPACES,
             EXTERNAL_GENERAL_ENTITIES,
             EXTERNAL_PARAMETER_ENTITIES,
         };
         addRecognizedFeatures(recognizedFeatures);
         fFeatures.put(PARSER_SETTINGS, Boolean.TRUE);
         // set state for default features
                 fFeatures.put(VALIDATION, Boolean.FALSE);
                 fFeatures.put(NAMESPACES, Boolean.TRUE);
                 fFeatures.put(EXTERNAL_GENERAL_ENTITIES, Boolean.TRUE);
                 fFeatures.put(EXTERNAL_PARAMETER_ENTITIES, Boolean.TRUE);

         // add default recognized properties
         final String[] recognizedProperties = {
             XML_STRING,
             SYMBOL_TABLE,
             ERROR_HANDLER,
             ENTITY_RESOLVER,
         };
         addRecognizedProperties(recognizedProperties);

         if (symbolTable == null) {
             symbolTable = new SymbolTable();
         }
         fSymbolTable = symbolTable;
         fProperties.put(SYMBOL_TABLE, fSymbolTable);

     } // <init>(SymbolTable)

     /**
      * Adds a component to the parser configuration. This method will
      * also add all of the component's recognized features and properties
      * to the list of default recognized features and properties.
      *
      * @param component The component to add.
      */
     protected void addComponent(XMLComponent component) {

         // don't add a component more than once
         if (fComponents.contains(component)) {
             return;
         }
         fComponents.add(component);

         // register component's recognized features
         String[] recognizedFeatures = component.getRecognizedFeatures();
         addRecognizedFeatures(recognizedFeatures);

         // register component's recognized properties
         String[] recognizedProperties = component.getRecognizedProperties();
         addRecognizedProperties(recognizedProperties);

         // set default values
         if (recognizedFeatures != null) {
             for (int i = 0; i < recognizedFeatures.length; i++) {
                 String featureId = recognizedFeatures[i];
                 Boolean state = component.getFeatureDefault(featureId);
                 if (state != null) {
                     super.setFeature(featureId, state.booleanValue());
                 }
             }
         }
         if (recognizedProperties != null) {
             for (int i = 0; i < recognizedProperties.length; i++) {
                 String propertyId = recognizedProperties[i];
                 Object value = component.getPropertyDefault(propertyId);
                 if (value != null) {
                     super.setProperty(propertyId, value);
                 }
             }
         }

     } // addComponent(XMLComponent)

     //
     // XMLParserConfiguration methods
     //

     /**
      * Parse an XML document.
      * <p>
      * The parser can use this method to instruct this configuration
      * to begin parsing an XML document from any valid input source
      * (a character stream, a byte stream, or a URI).
      * <p>
      * Parsers may not invoke this method while a parse is in progress.
      * Once a parse is complete, the parser may then parse another XML
      * document.
      * <p>
      * This method is synchronous: it will not return until parsing
      * has ended.  If a client application wants to terminate
      * parsing early, it should throw an exception.
      *
      * @param inputSource The input source for the top-level of the
      *               XML document.
      *
      * @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.
      */
     public abstract void parse(XMLInputSource inputSource)
         throws XNIException, IOException;

     /**
      * Sets the document handler on the last component in the pipeline
      * to receive information about the document.
      *
      * @param documentHandler   The document handler.
      */
     public void setDocumentHandler(XMLDocumentHandler documentHandler) {
         fDocumentHandler = documentHandler;
         if (fLastComponent != null) {
             fLastComponent.setDocumentHandler(fDocumentHandler);
             if (fDocumentHandler !=null){
                 fDocumentHandler.setDocumentSource(fLastComponent);
             }
         }
     } // setDocumentHandler(XMLDocumentHandler)

     /** Returns the registered document handler. */
     public XMLDocumentHandler getDocumentHandler() {
         return fDocumentHandler;
     } // getDocumentHandler():XMLDocumentHandler

     /**
      * Sets the DTD handler.
      *
      * @param dtdHandler The DTD handler.
      */
     public void setDTDHandler(XMLDTDHandler dtdHandler) {
         fDTDHandler = dtdHandler;
     } // setDTDHandler(XMLDTDHandler)

     /** Returns the registered DTD handler. */
     public XMLDTDHandler getDTDHandler() {
         return fDTDHandler;
     } // getDTDHandler():XMLDTDHandler

     /**
      * Sets the DTD content model handler.
      *
      * @param handler The DTD content model handler.
      */
     public void setDTDContentModelHandler(XMLDTDContentModelHandler handler) {
         fDTDContentModelHandler = handler;
     } // setDTDContentModelHandler(XMLDTDContentModelHandler)

     /** Returns the registered DTD content model handler. */
     public XMLDTDContentModelHandler getDTDContentModelHandler() {
         return fDTDContentModelHandler;
     } // getDTDContentModelHandler():XMLDTDContentModelHandler

     /**
      * Sets the resolver used to resolve external entities. The EntityResolver
      * interface supports resolution of public and system identifiers.
      *
      * @param resolver The new entity resolver. Passing a null value will
      *                 uninstall the currently installed resolver.
      */
     public void setEntityResolver(XMLEntityResolver resolver) {
         // REVISIT: Should this be a property?
         fProperties.put(ENTITY_RESOLVER, resolver);
     } // setEntityResolver(XMLEntityResolver)

     /**
      * Return the current entity resolver.
      *
      * @return The current entity resolver, or null if none
      *         has been registered.
      * @see #setEntityResolver
      */
     public XMLEntityResolver getEntityResolver() {
         // REVISIT: Should this be a property?
         return (XMLEntityResolver)fProperties.get(ENTITY_RESOLVER);
     } // getEntityResolver():XMLEntityResolver

     /**
      * Allow an application to register an error event handler.
      *
      * <p>If the application does not register an error handler, all
      * error events reported by the SAX parser will be silently
      * ignored; however, normal processing may not continue.  It is
      * highly recommended that all SAX applications implement an
      * error handler to avoid unexpected bugs.</p>
      *
      * <p>Applications may register a new or different handler in the
      * middle of a parse, and the SAX parser must begin using the new
      * handler immediately.</p>
      *
      * @param errorHandler The error handler.
      * @exception java.lang.NullPointerException If the handler
      *            argument is null.
      * @see #getErrorHandler
      */
     public void setErrorHandler(XMLErrorHandler errorHandler) {
         // REVISIT: Should this be a property?
         fProperties.put(ERROR_HANDLER, errorHandler);
     } // setErrorHandler(XMLErrorHandler)

     /**
      * Return the current error handler.
      *
      * @return The current error handler, or null if none
      *         has been registered.
      * @see #setErrorHandler
      */
     public XMLErrorHandler getErrorHandler() {
         // REVISIT: Should this be a property?
         return (XMLErrorHandler)fProperties.get(ERROR_HANDLER);
     } // getErrorHandler():XMLErrorHandler

     /**
      * Set the state of a feature.
      *
      * Set the state of any feature in a SAX2 parser.  The parser
      * might not recognize the feature, and if it does recognize
      * it, it might not be able to fulfill the request.
      *
      * @param featureId The unique identifier (URI) of the feature.
      * @param state The requested state of the feature (true or false).
      *
      * @exception com.sun.org.apache.xerces.internal.xni.parser.XMLConfigurationException If the
      *            requested feature is not known.
      */
     public void setFeature(String featureId, boolean state)
         throws XMLConfigurationException {

         // forward to every component
         int count = fComponents.size();
         for (int i = 0; i < count; i++) {
             XMLComponent c = (XMLComponent) fComponents.get(i);
             c.setFeature(featureId, state);
         }
         // save state if noone "objects"
         super.setFeature(featureId, state);

     } // setFeature(String,boolean)

     /**
      * setProperty
      *
      * @param propertyId
      * @param value
      */
     public void setProperty(String propertyId, Object value)
         throws XMLConfigurationException {

         // forward to every component
         int count = fComponents.size();
         for (int i = 0; i < count; i++) {
             XMLComponent c = (XMLComponent) fComponents.get(i);
             c.setProperty(propertyId, value);
         }

         // store value if noone "objects"
         super.setProperty(propertyId, value);

     } // setProperty(String,Object)

     /**
      * 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 {
         fLocale = locale;
     } // setLocale(Locale)

     /** Returns the locale. */
     public Locale getLocale() {
         return fLocale;
     } // getLocale():Locale

     //
     // Protected methods
     //

     /**
      * reset all components before parsing and namespace context
      */
     protected void reset() throws XNIException {

         // reset every component
         int count = fComponents.size();
         for (int i = 0; i < count; i++) {
             XMLComponent c = (XMLComponent) fComponents.get(i);
             c.reset(this);
         }

     } // reset()

     /**
      * Check a property. If the property is known and supported, this method
      * simply returns. Otherwise, the appropriate exception is thrown.
      *
      * @param propertyId The unique identifier (URI) of the property
      *                   being set.
      * @exception com.sun.org.apache.xerces.internal.xni.parser.XMLConfigurationException If the
      *            requested feature is not known or supported.
      */
     protected PropertyState checkProperty(String propertyId)
         throws XMLConfigurationException {

         // special cases
         if (propertyId.startsWith(Constants.SAX_PROPERTY_PREFIX)) {
             final int suffixLength = propertyId.length() - Constants.SAX_PROPERTY_PREFIX.length();

             //
             // http://xml.org/sax/properties/xml-string
             // Value type: String
             // Access: read-only
             //   Get the literal string of characters associated with the
             //   current event.  If the parser recognises and supports this
             //   property but is not currently parsing text, it should return
             //   null (this is a good way to check for availability before the
             //   parse begins).
             //
             if (suffixLength == Constants.XML_STRING_PROPERTY.length() &&
                 propertyId.endsWith(Constants.XML_STRING_PROPERTY)) {
                 // REVISIT - we should probably ask xml-dev for a precise
                 // definition of what this is actually supposed to return, and
                 // in exactly which circumstances.
                 return PropertyState.NOT_SUPPORTED;
             }
         }

         // check property
         return super.checkProperty(propertyId);

     } // checkProperty(String)


     /**
      * 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 <strong>really</strong>
      *                                   a critical error.
      */
     protected FeatureState checkFeature(String featureId)
         throws XMLConfigurationException {

         //
         // Xerces Features
         //
         if (featureId.startsWith(Constants.XERCES_FEATURE_PREFIX)) {
             final int suffixLength = featureId.length() - Constants.XERCES_FEATURE_PREFIX.length();

             //
             // special performance feature: no one by component manager is allowed to set it
             //
             if (suffixLength == Constants.PARSER_SETTINGS.length() &&
                 featureId.endsWith(Constants.PARSER_SETTINGS)) {
                 return FeatureState.NOT_SUPPORTED;
             }
         }

         return super.checkFeature(featureId);
      } // checkFeature(String)


 } // class BasicParserConfiguration
	/*
	* reserved comment block
	* DO NOT REMOVE OR ALTER!
	*/
	/*
	* Copyright 2001-2004 The Apache Software Foundation.
	*
	* 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 com.sun.org.apache.xerces.internal.parsers;

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

	import com.sun.org.apache.xerces.internal.impl.Constants;
	import com.sun.org.apache.xerces.internal.util.FeatureState;
	import com.sun.org.apache.xerces.internal.util.ParserConfigurationSettings;
	import com.sun.org.apache.xerces.internal.util.PropertyState;
	import com.sun.org.apache.xerces.internal.util.Status;
	import com.sun.org.apache.xerces.internal.util.SymbolTable;
	import com.sun.org.apache.xerces.internal.xni.XMLDTDContentModelHandler;
	import com.sun.org.apache.xerces.internal.xni.XMLDTDHandler;
	import com.sun.org.apache.xerces.internal.xni.XMLDocumentHandler;
	import com.sun.org.apache.xerces.internal.xni.XNIException;
	import com.sun.org.apache.xerces.internal.xni.parser.XMLComponent;
	import com.sun.org.apache.xerces.internal.xni.parser.XMLComponentManager;
	import com.sun.org.apache.xerces.internal.xni.parser.XMLConfigurationException;
	import com.sun.org.apache.xerces.internal.xni.parser.XMLDocumentSource;
	import com.sun.org.apache.xerces.internal.xni.parser.XMLEntityResolver;
	import com.sun.org.apache.xerces.internal.xni.parser.XMLErrorHandler;
	import com.sun.org.apache.xerces.internal.xni.parser.XMLInputSource;
	import com.sun.org.apache.xerces.internal.xni.parser.XMLParserConfiguration;

	/**
	* A very basic parser configuration. This configuration class can
	* be used as a base class for custom parser configurations. The
	* basic parser configuration creates the symbol table (if not
	* specified at construction time) and manages all of the recognized
	* features and properties.
	* <p>
	* The basic parser configuration does <strong>not</strong> mandate
	* any particular pipeline configuration or the use of specific
	* components except for the symbol table. If even this is too much
	* for a basic parser configuration, the programmer can create a new
	* configuration class that implements the
	* <code>XMLParserConfiguration</code> interface.
	* <p>
	* Subclasses of the basic parser configuration can add their own
	* recognized features and properties by calling the
	* <code>addRecognizedFeature</code> and
	* <code>addRecognizedProperty</code> methods, respectively.
	* <p>
	* The basic parser configuration assumes that the configuration
	* will be made up of various parser components that implement the
	* <code>XMLComponent</code> interface. If subclasses of this
	* configuration create their own components for use in the
	* parser configuration, then each component should be added to
	* the list of components by calling the <code>addComponent</code>
	* method. The basic parser configuration will make sure to call
	* the <code>reset</code> method of each registered component
	* before parsing an instance document.
	* <p>
	* This class recognizes the following features and properties:
	* <ul>
	* <li>Features
	* <ul>
	* <li>http://xml.org/sax/features/validation</li>
	* <li>http://xml.org/sax/features/namespaces</li>
	* <li>http://xml.org/sax/features/external-general-entities</li>
	* <li>http://xml.org/sax/features/external-parameter-entities</li>
	* </ul>
	* <li>Properties
	* <ul>
	* <li>http://xml.org/sax/properties/xml-string</li>
	* <li>http://apache.org/xml/properties/internal/symbol-table</li>
	* <li>http://apache.org/xml/properties/internal/error-handler</li>
	* <li>http://apache.org/xml/properties/internal/entity-resolver</li>
	* </ul>
	* </ul>
	*
	* @author Arnaud Le Hors, IBM
	* @author Andy Clark, IBM
	*
	* @version $Id: BasicParserConfiguration.java,v 1.6 2010-11-01 04:40:09 joehw Exp $
	*/
	public abstract class BasicParserConfiguration
	extends ParserConfigurationSettings
	implements XMLParserConfiguration {

	//
	// Constants
	//

	// feature identifiers

	/** Feature identifier: validation. */
	protected static final String VALIDATION =
	Constants.SAX_FEATURE_PREFIX + Constants.VALIDATION_FEATURE;

	/** Feature identifier: namespaces. */
	protected static final String NAMESPACES =
	Constants.SAX_FEATURE_PREFIX + Constants.NAMESPACES_FEATURE;

	/** Feature identifier: external general entities. */
	protected static final String EXTERNAL_GENERAL_ENTITIES =
	Constants.SAX_FEATURE_PREFIX + Constants.EXTERNAL_GENERAL_ENTITIES_FEATURE;

	/** Feature identifier: external parameter entities. */
	protected static final String EXTERNAL_PARAMETER_ENTITIES =
	Constants.SAX_FEATURE_PREFIX + Constants.EXTERNAL_PARAMETER_ENTITIES_FEATURE;

	// property identifiers

	/** Property identifier: xml string. */
	protected static final String XML_STRING =
	Constants.SAX_PROPERTY_PREFIX + Constants.XML_STRING_PROPERTY;

	/** Property identifier: symbol table. */
	protected static final String SYMBOL_TABLE =
	Constants.XERCES_PROPERTY_PREFIX + Constants.SYMBOL_TABLE_PROPERTY;

	/** Property identifier: error handler. */
	protected static final String ERROR_HANDLER =
	Constants.XERCES_PROPERTY_PREFIX + Constants.ERROR_HANDLER_PROPERTY;

	/** Property identifier: entity resolver. */
	protected static final String ENTITY_RESOLVER =
	Constants.XERCES_PROPERTY_PREFIX + Constants.ENTITY_RESOLVER_PROPERTY;

	//
	// Data
	//

	// components (non-configurable)

	/** Symbol table. */
	protected SymbolTable fSymbolTable;


	// data

	/** Locale. */
	protected Locale fLocale;

	/** Components. */
	protected ArrayList fComponents;

	// handlers

	/** The document handler. */
	protected XMLDocumentHandler fDocumentHandler;

	/** The DTD handler. */
	protected XMLDTDHandler fDTDHandler;

	/** The DTD content model handler. */
	protected XMLDTDContentModelHandler fDTDContentModelHandler;

	/** Last component in the document pipeline */
	protected XMLDocumentSource fLastComponent;

	//
	// Constructors
	//

	/** Default Constructor. */
	protected BasicParserConfiguration() {
	this(null, null);
	} // <init>()

	/**
	* Constructs a parser configuration using the specified symbol table.
	*
	* @param symbolTable The symbol table to use.
	*/
	protected BasicParserConfiguration(SymbolTable symbolTable) {
	this(symbolTable, null);
	} // <init>(SymbolTable)

	/**
	* Constructs a parser configuration using the specified symbol table
	* and parent settings.
	*
	* @param symbolTable The symbol table to use.
	* @param parentSettings The parent settings.
	*/
	protected BasicParserConfiguration(SymbolTable symbolTable,
	XMLComponentManager parentSettings) {
	super(parentSettings);

	// create a vector to hold all the components in use
	fComponents = new ArrayList();

	// create table for features and properties
	fFeatures = new HashMap();
	fProperties = new HashMap();

	// add default recognized features
	final String[] recognizedFeatures = {
	PARSER_SETTINGS,
	VALIDATION,
	NAMESPACES,
	EXTERNAL_GENERAL_ENTITIES,
	EXTERNAL_PARAMETER_ENTITIES,
	};
	addRecognizedFeatures(recognizedFeatures);
	fFeatures.put(PARSER_SETTINGS, Boolean.TRUE);
	// set state for default features
	fFeatures.put(VALIDATION, Boolean.FALSE);
	fFeatures.put(NAMESPACES, Boolean.TRUE);
	fFeatures.put(EXTERNAL_GENERAL_ENTITIES, Boolean.TRUE);
	fFeatures.put(EXTERNAL_PARAMETER_ENTITIES, Boolean.TRUE);

	// add default recognized properties
	final String[] recognizedProperties = {
	XML_STRING,
	SYMBOL_TABLE,
	ERROR_HANDLER,
	ENTITY_RESOLVER,
	};
	addRecognizedProperties(recognizedProperties);

	if (symbolTable == null) {
	symbolTable = new SymbolTable();
	}
	fSymbolTable = symbolTable;
	fProperties.put(SYMBOL_TABLE, fSymbolTable);

	} // <init>(SymbolTable)

	/**
	* Adds a component to the parser configuration. This method will
	* also add all of the component's recognized features and properties
	* to the list of default recognized features and properties.
	*
	* @param component The component to add.
	*/
	protected void addComponent(XMLComponent component) {

	// don't add a component more than once
	if (fComponents.contains(component)) {
	return;
	}
	fComponents.add(component);

	// register component's recognized features
	String[] recognizedFeatures = component.getRecognizedFeatures();
	addRecognizedFeatures(recognizedFeatures);

	// register component's recognized properties
	String[] recognizedProperties = component.getRecognizedProperties();
	addRecognizedProperties(recognizedProperties);

	// set default values
	if (recognizedFeatures != null) {
	for (int i = 0; i < recognizedFeatures.length; i++) {
	String featureId = recognizedFeatures[i];
	Boolean state = component.getFeatureDefault(featureId);
	if (state != null) {
	super.setFeature(featureId, state.booleanValue());
	}
	}
	}
	if (recognizedProperties != null) {
	for (int i = 0; i < recognizedProperties.length; i++) {
	String propertyId = recognizedProperties[i];
	Object value = component.getPropertyDefault(propertyId);
	if (value != null) {
	super.setProperty(propertyId, value);
	}
	}
	}

	} // addComponent(XMLComponent)

	//
	// XMLParserConfiguration methods
	//

	/**
	* Parse an XML document.
	* <p>
	* The parser can use this method to instruct this configuration
	* to begin parsing an XML document from any valid input source
	* (a character stream, a byte stream, or a URI).
	* <p>
	* Parsers may not invoke this method while a parse is in progress.
	* Once a parse is complete, the parser may then parse another XML
	* document.
	* <p>
	* This method is synchronous: it will not return until parsing
	* has ended. If a client application wants to terminate
	* parsing early, it should throw an exception.
	*
	* @param inputSource The input source for the top-level of the
	* XML document.
	*
	* @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.
	*/
	public abstract void parse(XMLInputSource inputSource)
	throws XNIException, IOException;

	/**
	* Sets the document handler on the last component in the pipeline
	* to receive information about the document.
	*
	* @param documentHandler The document handler.
	*/
	public void setDocumentHandler(XMLDocumentHandler documentHandler) {
	fDocumentHandler = documentHandler;
	if (fLastComponent != null) {
	fLastComponent.setDocumentHandler(fDocumentHandler);
	if (fDocumentHandler !=null){
	fDocumentHandler.setDocumentSource(fLastComponent);
	}
	}
	} // setDocumentHandler(XMLDocumentHandler)

	/** Returns the registered document handler. */
	public XMLDocumentHandler getDocumentHandler() {
	return fDocumentHandler;
	} // getDocumentHandler():XMLDocumentHandler

	/**
	* Sets the DTD handler.
	*
	* @param dtdHandler The DTD handler.
	*/
	public void setDTDHandler(XMLDTDHandler dtdHandler) {
	fDTDHandler = dtdHandler;
	} // setDTDHandler(XMLDTDHandler)

	/** Returns the registered DTD handler. */
	public XMLDTDHandler getDTDHandler() {
	return fDTDHandler;
	} // getDTDHandler():XMLDTDHandler

	/**
	* Sets the DTD content model handler.
	*
	* @param handler The DTD content model handler.
	*/
	public void setDTDContentModelHandler(XMLDTDContentModelHandler handler) {
	fDTDContentModelHandler = handler;
	} // setDTDContentModelHandler(XMLDTDContentModelHandler)

	/** Returns the registered DTD content model handler. */
	public XMLDTDContentModelHandler getDTDContentModelHandler() {
	return fDTDContentModelHandler;
	} // getDTDContentModelHandler():XMLDTDContentModelHandler

	/**
	* Sets the resolver used to resolve external entities. The EntityResolver
	* interface supports resolution of public and system identifiers.
	*
	* @param resolver The new entity resolver. Passing a null value will
	* uninstall the currently installed resolver.
	*/
	public void setEntityResolver(XMLEntityResolver resolver) {
	// REVISIT: Should this be a property?
	fProperties.put(ENTITY_RESOLVER, resolver);
	} // setEntityResolver(XMLEntityResolver)

	/**
	* Return the current entity resolver.
	*
	* @return The current entity resolver, or null if none
	* has been registered.
	* @see #setEntityResolver
	*/
	public XMLEntityResolver getEntityResolver() {
	// REVISIT: Should this be a property?
	return (XMLEntityResolver)fProperties.get(ENTITY_RESOLVER);
	} // getEntityResolver():XMLEntityResolver

	/**
	* Allow an application to register an error event handler.
	*
	* <p>If the application does not register an error handler, all
	* error events reported by the SAX parser will be silently
	* ignored; however, normal processing may not continue. It is
	* highly recommended that all SAX applications implement an
	* error handler to avoid unexpected bugs.</p>
	*
	* <p>Applications may register a new or different handler in the
	* middle of a parse, and the SAX parser must begin using the new
	* handler immediately.</p>
	*
	* @param errorHandler The error handler.
	* @exception java.lang.NullPointerException If the handler
	* argument is null.
	* @see #getErrorHandler
	*/
	public void setErrorHandler(XMLErrorHandler errorHandler) {
	// REVISIT: Should this be a property?
	fProperties.put(ERROR_HANDLER, errorHandler);
	} // setErrorHandler(XMLErrorHandler)

	/**
	* Return the current error handler.
	*
	* @return The current error handler, or null if none
	* has been registered.
	* @see #setErrorHandler
	*/
	public XMLErrorHandler getErrorHandler() {
	// REVISIT: Should this be a property?
	return (XMLErrorHandler)fProperties.get(ERROR_HANDLER);
	} // getErrorHandler():XMLErrorHandler

	/**
	* Set the state of a feature.
	*
	* Set the state of any feature in a SAX2 parser. The parser
	* might not recognize the feature, and if it does recognize
	* it, it might not be able to fulfill the request.
	*
	* @param featureId The unique identifier (URI) of the feature.
	* @param state The requested state of the feature (true or false).
	*
	* @exception com.sun.org.apache.xerces.internal.xni.parser.XMLConfigurationException If the
	* requested feature is not known.
	*/
	public void setFeature(String featureId, boolean state)
	throws XMLConfigurationException {

	// forward to every component
	int count = fComponents.size();
	for (int i = 0; i < count; i++) {
	XMLComponent c = (XMLComponent) fComponents.get(i);
	c.setFeature(featureId, state);
	}
	// save state if noone "objects"
	super.setFeature(featureId, state);

	} // setFeature(String,boolean)

	/**
	* setProperty
	*
	* @param propertyId
	* @param value
	*/
	public void setProperty(String propertyId, Object value)
	throws XMLConfigurationException {

	// forward to every component
	int count = fComponents.size();
	for (int i = 0; i < count; i++) {
	XMLComponent c = (XMLComponent) fComponents.get(i);
	c.setProperty(propertyId, value);
	}

	// store value if noone "objects"
	super.setProperty(propertyId, value);

	} // setProperty(String,Object)

	/**
	* 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 {
	fLocale = locale;
	} // setLocale(Locale)

	/** Returns the locale. */
	public Locale getLocale() {
	return fLocale;
	} // getLocale():Locale

	//
	// Protected methods
	//

	/**
	* reset all components before parsing and namespace context
	*/
	protected void reset() throws XNIException {

	// reset every component
	int count = fComponents.size();
	for (int i = 0; i < count; i++) {
	XMLComponent c = (XMLComponent) fComponents.get(i);
	c.reset(this);
	}

	} // reset()

	/**
	* Check a property. If the property is known and supported, this method
	* simply returns. Otherwise, the appropriate exception is thrown.
	*
	* @param propertyId The unique identifier (URI) of the property
	* being set.
	* @exception com.sun.org.apache.xerces.internal.xni.parser.XMLConfigurationException If the
	* requested feature is not known or supported.
	*/
	protected PropertyState checkProperty(String propertyId)
	throws XMLConfigurationException {

	// special cases
	if (propertyId.startsWith(Constants.SAX_PROPERTY_PREFIX)) {
	final int suffixLength = propertyId.length() - Constants.SAX_PROPERTY_PREFIX.length();

	//
	// http://xml.org/sax/properties/xml-string
	// Value type: String
	// Access: read-only
	// Get the literal string of characters associated with the
	// current event. If the parser recognises and supports this
	// property but is not currently parsing text, it should return
	// null (this is a good way to check for availability before the
	// parse begins).
	//
	if (suffixLength == Constants.XML_STRING_PROPERTY.length() &&
	propertyId.endsWith(Constants.XML_STRING_PROPERTY)) {
	// REVISIT - we should probably ask xml-dev for a precise
	// definition of what this is actually supposed to return, and
	// in exactly which circumstances.
	return PropertyState.NOT_SUPPORTED;
	}
	}

	// check property
	return super.checkProperty(propertyId);

	} // checkProperty(String)


	/**
	* 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 <strong>really</strong>
	* a critical error.
	*/
	protected FeatureState checkFeature(String featureId)
	throws XMLConfigurationException {

	//
	// Xerces Features
	//
	if (featureId.startsWith(Constants.XERCES_FEATURE_PREFIX)) {
	final int suffixLength = featureId.length() - Constants.XERCES_FEATURE_PREFIX.length();

	//
	// special performance feature: no one by component manager is allowed to set it
	//
	if (suffixLength == Constants.PARSER_SETTINGS.length() &&
	featureId.endsWith(Constants.PARSER_SETTINGS)) {
	return FeatureState.NOT_SUPPORTED;
	}
	}

	return super.checkFeature(featureId);
	} // checkFeature(String)


	} // class BasicParserConfiguration