xmldtdprocessor.java

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/*
 * The Apache Software License, Version 1.1
 *
 *
 * Copyright (c) 1999-2002 The Apache Software Foundation.  
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:  
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Xerces" and "Apache Software Foundation" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written 
 *    permission, please contact [e-mail].
 *
 * 5. Products derived from this software may not be called "Apache",
 *    nor may "Apache" appear in their name, without prior written
 *    permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation and was
 * originally based on software copyright (c) 1999, International
 * Business Machines, Inc., http://www.apache.org.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

package com.sun.org.apache.xerces.internal.impl.dtd;

import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Locale;
import java.util.StringTokenizer;
import java.util.Vector;

import com.sun.org.apache.xerces.internal.impl.Constants;
import com.sun.org.apache.xerces.internal.impl.XMLErrorReporter;
import com.sun.org.apache.xerces.internal.impl.msg.XMLMessageFormatter;
import com.sun.org.apache.xerces.internal.util.SymbolTable;
import com.sun.org.apache.xerces.internal.util.XMLChar;
import com.sun.org.apache.xerces.internal.util.XMLSymbols;
import com.sun.org.apache.xerces.internal.xni.Augmentations;
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.XMLLocator;
import com.sun.org.apache.xerces.internal.xni.XMLResourceIdentifier;
import com.sun.org.apache.xerces.internal.xni.XMLString;
import com.sun.org.apache.xerces.internal.xni.XNIException;
import com.sun.org.apache.xerces.internal.xni.grammars.Grammar;
import com.sun.org.apache.xerces.internal.xni.grammars.XMLGrammarDescription;
import com.sun.org.apache.xerces.internal.xni.grammars.XMLGrammarPool;
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.XMLDTDContentModelFilter;
import com.sun.org.apache.xerces.internal.xni.parser.XMLDTDContentModelSource;
import com.sun.org.apache.xerces.internal.xni.parser.XMLDTDFilter;
import com.sun.org.apache.xerces.internal.xni.parser.XMLDTDSource;

/**
 * The DTD processor. The processor implements a DTD
 * filter: receiving DTD events from the DTD scanner; validating
 * the content and structure; building a grammar, if applicable;
 * and notifying the DTDHandler of the information resulting from the
 * process.
 * <p>
 * This component requires the following features and properties from the
 * component manager that uses it:
 * <ul>
 *  <li>http://xml.org/sax/features/namespaces</li>
 *  <li>http://apache.org/xml/properties/internal/symbol-table</li>
 *  <li>http://apache.org/xml/properties/internal/error-reporter</li>
 *  <li>http://apache.org/xml/properties/internal/grammar-pool</li>
 *  <li>http://apache.org/xml/properties/internal/datatype-validator-factory</li>
 * </ul>
 * 
 * @xerces.internal
 *
 * @author Neil Graham, IBM
 *
 * @version $Id: XMLDTDProcessor.java,v 1.1.2.1 2005/08/01 03:36:41 jeffsuttor Exp $
 */
public class XMLDTDProcessor
        implements XMLComponent, XMLDTDFilter, XMLDTDContentModelFilter {

    //
    // Constants
    //

    /** Top level scope (-1). */
    private static final int TOP_LEVEL_SCOPE = -1;

    // feature identifiers

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

    /** Feature identifier: notify character references. */
    protected static final String NOTIFY_CHAR_REFS =
        Constants.XERCES_FEATURE_PREFIX + Constants.NOTIFY_CHAR_REFS_FEATURE;

    /** Feature identifier: warn on duplicate attdef */
    protected static final String WARN_ON_DUPLICATE_ATTDEF = 
        Constants.XERCES_FEATURE_PREFIX +Constants.WARN_ON_DUPLICATE_ATTDEF_FEATURE; 
        
	protected static final String PARSER_SETTINGS = 
			Constants.XERCES_FEATURE_PREFIX + Constants.PARSER_SETTINGS;

    // property identifiers

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

    /** Property identifier: error reporter. */
    protected static final String ERROR_REPORTER =
        Constants.XERCES_PROPERTY_PREFIX + Constants.ERROR_REPORTER_PROPERTY;

    /** Property identifier: grammar pool. */
    protected static final String GRAMMAR_POOL =
        Constants.XERCES_PROPERTY_PREFIX + Constants.XMLGRAMMAR_POOL_PROPERTY;

    /** Property identifier: validator . */
    protected static final String DTD_VALIDATOR =
        Constants.XERCES_PROPERTY_PREFIX + Constants.DTD_VALIDATOR_PROPERTY;

    // recognized features and properties

    /** Recognized features. */
    private static final String[] RECOGNIZED_FEATURES = {
        VALIDATION,
        WARN_ON_DUPLICATE_ATTDEF,
        NOTIFY_CHAR_REFS,
    };

    /** Feature defaults. */
    private static final Boolean[] FEATURE_DEFAULTS = {
        null,
        Boolean.FALSE,
        null,
    };

    /** Recognized properties. */
    private static final String[] RECOGNIZED_PROPERTIES = {
        SYMBOL_TABLE,       
        ERROR_REPORTER,
        GRAMMAR_POOL,       
        DTD_VALIDATOR,
    };

    /** Property defaults. */
    private static final Object[] PROPERTY_DEFAULTS = {
        null,
        null,
        null,
        null,
    };

    // debugging

    //        
    // Data
    //

    // features

    /** Validation. */
    protected boolean fValidation;

    /** Validation against only DTD */
    protected boolean fDTDValidation;

    /** warn on duplicate attribute definition, this feature works only when validation is true */
    protected boolean fWarnDuplicateAttdef;
        
    // properties

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

    /** Error reporter. */
    protected XMLErrorReporter fErrorReporter;

    /** Grammar bucket. */
    protected DTDGrammarBucket fGrammarBucket;

    // the validator to which we look for our grammar bucket (the
    // validator needs to hold the bucket so that it can initialize
    // the grammar with details like whether it's for a standalone document...
    protected XMLDTDValidator fValidator;

    // the grammar pool we'll try to add the grammar to:
    protected XMLGrammarPool fGrammarPool;

    // what's our Locale?
    protected Locale fLocale;

    // handlers

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

    /** DTD source. */
    protected XMLDTDSource fDTDSource;

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

    /** DTD content model source. */
    protected XMLDTDContentModelSource fDTDContentModelSource;

    // grammars

    /** DTD Grammar. */
    protected DTDGrammar fDTDGrammar;

    // state

    /** Perform validation. */
    private boolean fPerformValidation;

    /** True if in an ignore conditional section of the DTD. */
    protected boolean fInDTDIgnore;

    // information regarding the current element

    // validation states

    /** Mixed. */
    private boolean fMixed;

    // temporary variables

    /** Temporary entity declaration. */
    private XMLEntityDecl fEntityDecl = new XMLEntityDecl();

    /** Notation declaration hash. */
    private Hashtable fNDataDeclNotations = new Hashtable();

    /** DTD element declaration name. */
    private String fDTDElementDeclName = null;

    /** Mixed element type "hash". */
    private Vector fMixedElementTypes = new Vector();

    /** Element declarations in DTD. */
    private Vector fDTDElementDecls = new Vector();

    // to check for duplicate ID or ANNOTATION attribute declare in
    // ATTLIST, and misc VCs

    /** ID attribute names. */
    private Hashtable fTableOfIDAttributeNames;

    /** NOTATION attribute names. */
    private Hashtable fTableOfNOTATIONAttributeNames;

    /** NOTATION enumeration values. */
    private Hashtable fNotationEnumVals;

    //
    // Constructors
    //

    /** Default constructor. */
    public XMLDTDProcessor() {

        // initialize data

    } // <init>()

    //
    // XMLComponent methods
    //

    /*
     * Resets the component. The component can query the component manager
     * about any features and properties that affect the operation of the
     * component.
     * 
     * @param componentManager The component manager.
     *
     * @throws SAXException Thrown by component on finitialization error.
     *                      For example, if a feature or property is
     *                      required for the operation of the component, the
     *                      component manager may throw a 
     *                      SAXNotRecognizedException or a
     *                      SAXNotSupportedException.
     */
    public void reset(XMLComponentManager componentManager) throws XMLConfigurationException {
       
        boolean parser_settings;
        try {
            parser_settings = componentManager.getFeature(PARSER_SETTINGS);
        } catch (XMLConfigurationException e) {
            parser_settings = true;
        }

        if (!parser_settings) {
            // parser settings have not been changed
            reset();
            return;
        }

        // sax features
        try {
            fValidation = componentManager.getFeature(VALIDATION);
        } catch (XMLConfigurationException e) {
            fValidation = false;