xmldtdvalidator.java

java1.6众多例子参考

/*
 * Copyright 1999-2005 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.impl.dtd;

import com.sun.org.apache.xerces.internal.impl.Constants;
import com.sun.org.apache.xerces.internal.impl.RevalidationHandler;
import com.sun.org.apache.xerces.internal.impl.XMLEntityManager;
import com.sun.org.apache.xerces.internal.impl.XMLErrorReporter;
import com.sun.org.apache.xerces.internal.impl.dtd.models.ContentModelValidator;
import com.sun.org.apache.xerces.internal.impl.dv.DTDDVFactory;
import com.sun.org.apache.xerces.internal.impl.dv.DatatypeValidator;
import com.sun.org.apache.xerces.internal.impl.dv.InvalidDatatypeValueException;
import com.sun.org.apache.xerces.internal.impl.msg.XMLMessageFormatter;
import com.sun.org.apache.xerces.internal.impl.validation.ValidationManager;
import com.sun.org.apache.xerces.internal.impl.validation.ValidationState;
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.NamespaceContext;
import com.sun.org.apache.xerces.internal.xni.QName;
import com.sun.org.apache.xerces.internal.xni.XMLAttributes;
import com.sun.org.apache.xerces.internal.xni.XMLDocumentHandler;
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.XMLDocumentFilter;
import com.sun.org.apache.xerces.internal.xni.parser.XMLDocumentSource;

/**
 * The DTD validator. The validator implements a document
 * filter: receiving document events from the scanner; validating
 * the content and structure; augmenting the InfoSet, if applicable;
 * and notifying the parser of the information resulting from the
 * validation process.
 * <p> Formerly, this component also handled DTD events and grammar construction.
 * To facilitate the development of a meaningful DTD grammar caching/preparsing
 * framework, this functionality has been moved into the XMLDTDLoader
 * class.  Therefore, this class no longer implements the DTDFilter
 * or DTDContentModelFilter interfaces.
 * <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://xml.org/sax/features/validation</li>
 *  <li>http://apache.org/xml/features/validation/dynamic</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 Eric Ye, IBM
 * @author Andy Clark, IBM
 * @author Jeffrey Rodriguez IBM
 * @author Neil Graham, IBM
 *
 * @version $Id: XMLDTDValidator.java,v 1.3 2005/09/26 13:02:18 sunithareddy Exp $
 */
public class XMLDTDValidator
        implements XMLComponent, XMLDocumentFilter, XMLDTDValidatorFilter, RevalidationHandler {

    //
    // Constants
    //

    /** Symbol: "&lt;&lt;datatypes>>". */

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

    // feature identifiers

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

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

    /** Feature identifier: dynamic validation. */
    protected static final String DYNAMIC_VALIDATION = 
    Constants.XERCES_FEATURE_PREFIX + Constants.DYNAMIC_VALIDATION_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: datatype validator factory. */
    protected static final String DATATYPE_VALIDATOR_FACTORY =
        Constants.XERCES_PROPERTY_PREFIX + Constants.DATATYPE_VALIDATOR_FACTORY_PROPERTY;

    // property identifier:  ValidationManager
    protected static final String VALIDATION_MANAGER =
        Constants.XERCES_PROPERTY_PREFIX + Constants.VALIDATION_MANAGER_PROPERTY;

    // recognized features and properties

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

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

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

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

    // debugging

    /** Compile to true to debug attributes. */
    private static final boolean DEBUG_ATTRIBUTES = false;

    /** Compile to true to debug element children. */
    private static final boolean DEBUG_ELEMENT_CHILDREN = false;

    //        
    // Data
    //

    // updated during reset
    protected ValidationManager fValidationManager = null;
    
    // validation state
    protected ValidationState   fValidationState   = new ValidationState();

    // features

    /** Namespaces. */
    protected boolean fNamespaces;

    /** Validation. */
    protected boolean fValidation;

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

    /** 
     * Dynamic validation. This state of this feature is only useful when
     * the validation feature is set to <code>true</code>.
     */
    protected boolean fDynamicValidation;

    /** 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;

    // the grammar pool
    protected XMLGrammarPool fGrammarPool;

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

    /* location of the document as passed in from startDocument call */
    protected XMLLocator fDocLocation;

    /** Namespace support. */
    protected NamespaceContext fNamespaceContext = null;

    /** Datatype validator factory. */
    protected DTDDVFactory fDatatypeValidatorFactory;

    // handlers

    /** Document handler. */
    protected XMLDocumentHandler fDocumentHandler;

    protected XMLDocumentSource fDocumentSource;
    // grammars

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

    // state

    /** True if seen DOCTYPE declaration. */
    protected boolean fSeenDoctypeDecl = false;

    /** Perform validation. */
    private boolean fPerformValidation;
    
    /** Schema type: None, DTD, Schema */
    private String fSchemaType;

    // information regarding the current element

    /** Current element name. */
    private final QName fCurrentElement = new QName();

    /** Current element index. */
    private int fCurrentElementIndex = -1;

    /** Current content spec type. */
    private int fCurrentContentSpecType = -1;

    /** The root element name. */
    private final QName fRootElement = new QName();

    private boolean fInCDATASection = false;
    // element stack

    /** Element index stack. */
    private int[] fElementIndexStack = new int[8];

    /** Content spec type stack. */
    private int[] fContentSpecTypeStack = new int[8];

    /** Element name stack. */
    private QName[] fElementQNamePartsStack = new QName[8];

    // children list and offset stack

    /** 
     * Element children. This data structure is a growing stack that
     * holds the children of elements from the root to the current
     * element depth. This structure never gets "deeper" than the
     * deepest element. Space is re-used once each element is closed.
     * <p>
     * <strong>Note:</strong> This is much more efficient use of memory
     * than creating new arrays for each element depth.
     * <p>
     * <strong>Note:</strong> The use of this data structure is for
     * validation "on the way out". If the validation model changes to
     * "on the way in", then this data structure is not needed.
     */
    private QName[] fElementChildren = new QName[32];

    /** Element children count. */
    private int fElementChildrenLength = 0;

    /** 
     * Element children offset stack. This stack refers to offsets
     * into the <code>fElementChildren</code> array.
     * @see #fElementChildren
     */
    private int[] fElementChildrenOffsetStack = new int[32];

    /** Element depth. */
    private int fElementDepth = -1;

    // validation states

    /** True if seen the root element. */
    private boolean fSeenRootElement = false;

    /** True if inside of element content. */
    private boolean fInElementContent = false;

    // temporary variables

    /** Temporary element declaration. */
    private XMLElementDecl fTempElementDecl = new XMLElementDecl();

    /** Temporary atribute declaration. */
    private XMLAttributeDecl fTempAttDecl = new XMLAttributeDecl();

    /** Temporary entity declaration. */