xmldocumentscannerimpl.java

java1.6众多例子参考

/*
 * The contents of this file are subject to the terms
 * of the Common Development and Distribution License
 * (the "License").  You may not use this file except
 * in compliance with the License.
 *
 * You can obtain a copy of the license at
 * https://jaxp.dev.java.net/CDDLv1.0.html.
 * See the License for the specific language governing
 * permissions and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL
 * HEADER in each file and include the License file at
 * https://jaxp.dev.java.net/CDDLv1.0.html
 * If applicable add the following below this CDDL HEADER
 * with the fields enclosed by brackets "[]" replaced with
 * your own identifying information: Portions Copyright
 * [year] [name of copyright owner]
 */

/*
 * $Id: XMLDocumentScannerImpl.java,v 1.9 2007/05/09 15:23:31 ndw Exp $
 * @(#)XMLDocumentScannerImpl.java	1.18 08/03/28
 *
 * Copyright 2005 Sun Microsystems, Inc. All Rights Reserved.
 */

/*
 * Copyright 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;


import com.sun.xml.internal.stream.Entity;
import com.sun.xml.internal.stream.StaxXMLInputSource;
import com.sun.xml.internal.stream.dtd.DTDGrammarUtil;
import java.io.EOFException;
import java.io.IOException;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.events.XMLEvent;

import com.sun.org.apache.xerces.internal.impl.validation.ValidationManager;
import com.sun.org.apache.xerces.internal.util.NamespaceSupport;
import com.sun.org.apache.xerces.internal.util.XMLChar;
import com.sun.org.apache.xerces.internal.util.XMLResourceIdentifierImpl;
import com.sun.org.apache.xerces.internal.util.XMLStringBuffer;
import com.sun.org.apache.xerces.internal.xni.NamespaceContext;
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.parser.XMLInputSource;
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.XMLDTDScanner;
import com.sun.org.apache.xerces.internal.xni.Augmentations;
import com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDDescription;
import com.sun.org.apache.xerces.internal.xni.parser.XMLDocumentScanner;


/**
 * This class is responsible for scanning XML document structure
 * and content.
 *
 * This class has been modified as per the new design which is more suited to
 * efficiently build pull parser. Lot of improvements have been done and
 * the code has been added to support stax functionality/features.
 *
 * @author Neeraj Bajaj, Sun Microsystems
 * @author K.Venugopal, Sun Microsystems
 * @author Glenn Marcy, IBM
 * @author Andy Clark, IBM
 * @author Arnaud  Le Hors, IBM
 * @author Eric Ye, IBM
 * @author Sunitha Reddy, Sun Microsystems
 *
 * Refer to the table in unit-test javax.xml.stream.XMLStreamReaderTest.SupportDTD for changes
 * related to property SupportDTD.
 * @author Joe Wang, Sun Microsystems
 * @version $Id: XMLDocumentScannerImpl.java,v 1.9 2007/05/09 15:23:31 ndw Exp $
 */
public class XMLDocumentScannerImpl
        extends XMLDocumentFragmentScannerImpl{
    
    //
    // Constants
    //
    
    // scanner states
    
    /** Scanner state: XML declaration. */
    protected static final int SCANNER_STATE_XML_DECL = 42;
    
    /** Scanner state: prolog. */
    protected static final int SCANNER_STATE_PROLOG = 43;
    
    /** Scanner state: trailing misc. */
    protected static final int SCANNER_STATE_TRAILING_MISC = 44;
    
    /** Scanner state: DTD internal declarations. */
    protected static final int SCANNER_STATE_DTD_INTERNAL_DECLS = 45;
    
    /** Scanner state: open DTD external subset. */
    protected static final int SCANNER_STATE_DTD_EXTERNAL = 46;
    
    /** Scanner state: DTD external declarations. */
    protected static final int SCANNER_STATE_DTD_EXTERNAL_DECLS = 47;
    
    /** Scanner state: NO MORE ELEMENTS. */
    protected static final int SCANNER_STATE_NO_SUCH_ELEMENT_EXCEPTION = 48;
    
    // feature identifiers
    
    /** Property identifier document scanner: */
    protected static final String DOCUMENT_SCANNER =
            Constants.XERCES_PROPERTY_PREFIX + Constants.DOCUMENT_SCANNER_PROPERTY;
    
    /** Feature identifier: load external DTD. */
    protected static final String LOAD_EXTERNAL_DTD =
            Constants.XERCES_FEATURE_PREFIX + Constants.LOAD_EXTERNAL_DTD_FEATURE;
    
    /** Feature identifier: load external DTD. */
    protected static final String DISALLOW_DOCTYPE_DECL_FEATURE =
            Constants.XERCES_FEATURE_PREFIX + Constants.DISALLOW_DOCTYPE_DECL_FEATURE;
    
    // property identifiers
    
    /** Property identifier: DTD scanner. */
    protected static final String DTD_SCANNER =
            Constants.XERCES_PROPERTY_PREFIX + Constants.DTD_SCANNER_PROPERTY;
    
    // property identifier:  ValidationManager
    protected static final String VALIDATION_MANAGER =
            Constants.XERCES_PROPERTY_PREFIX + Constants.VALIDATION_MANAGER_PROPERTY;

    /** property identifier:  NamespaceContext */
    protected static final String NAMESPACE_CONTEXT =
        Constants.XERCES_PROPERTY_PREFIX + Constants.NAMESPACE_CONTEXT_PROPERTY;
    
    // recognized features and properties
    
    /** Recognized features. */
    private static final String[] RECOGNIZED_FEATURES = {
        LOAD_EXTERNAL_DTD,
                DISALLOW_DOCTYPE_DECL_FEATURE,
    };
    
    /** Feature defaults. */
    private static final Boolean[] FEATURE_DEFAULTS = {
        Boolean.TRUE,
                Boolean.FALSE,
    };
    
    /** Recognized properties. */
    private static final String[] RECOGNIZED_PROPERTIES = {
        DTD_SCANNER,
                VALIDATION_MANAGER
    };
    
    /** Property defaults. */
    private static final Object[] PROPERTY_DEFAULTS = {
        null,
                null
    };
    
    //
    // Data((Boolean)propertyManager.getProperty(XMLInputFactory.IS_NAMESPACE_AWARE)).booleanValue();
    //
    
    // properties
    
    /** DTD scanner. */
    protected XMLDTDScanner fDTDScanner = null;
        
    /** Validation manager . */
    //xxx: fValidationManager code needs to be added yet!
    protected ValidationManager fValidationManager;
    
    protected XMLStringBuffer fDTDDecl = null;
    protected boolean fReadingDTD = false;
    protected boolean fAddedListener = false;
    
    // protected data
    
    // other info
    
    /** Doctype name. */
    protected String fDoctypeName;
    
    /** Doctype declaration public identifier. */
    protected String fDoctypePublicId;
    
    /** Doctype declaration system identifier. */
    protected String fDoctypeSystemId;
    
    /** Namespace support. */
    protected NamespaceContext fNamespaceContext = new NamespaceSupport();
    
    // features
    
    /** Load external DTD. */
    protected boolean fLoadExternalDTD = true;
    
    // state
    
    /** Seen doctype declaration. */
    protected boolean fSeenDoctypeDecl;
        
    protected boolean fScanEndElement;
    
    //protected int fScannerLastState ;
    
    // drivers
    
    /** XML declaration driver. */
    protected Driver fXMLDeclDriver = new XMLDeclDriver();
    
    /** Prolog driver. */
    protected Driver fPrologDriver = new PrologDriver();
    
    /** DTD driver. */
    protected Driver fDTDDriver = null ;
    
    /** Trailing miscellaneous section driver. */
    protected Driver fTrailingMiscDriver = new TrailingMiscDriver();
    protected int fStartPos = 0;
    protected int fEndPos = 0;
    protected boolean fSeenInternalSubset= false;
    // temporary variables
    
    /** Array of 3 strings. */
    private String[] fStrings = new String[3];
    
    /** External subset source. */
    private XMLInputSource fExternalSubsetSource = null;
    
    /** A DTD Description. */
    private final XMLDTDDescription fDTDDescription = new XMLDTDDescription(null, null, null, null, null);

    /** String. */
    private XMLString fString = new XMLString();
    
    private static final char [] DOCTYPE = {'D','O','C','T','Y','P','E'};
    private static final char [] COMMENTSTRING = {'-','-'};
        
    //
    // Constructors
    //
    
    /** Default constructor. */
    public XMLDocumentScannerImpl() {} // <init>()
    
    
    //
    // XMLDocumentScanner methods
    //
    
    
    /**
     * Sets the input source.
     *
     * @param inputSource The input source.
     *
     * @throws IOException Thrown on i/o error.
     */
    public void setInputSource(XMLInputSource inputSource) throws IOException {
        fEntityManager.setEntityHandler(this);
        //this starts a new entity and sets the current entity to the document entity.
        fEntityManager.startDocumentEntity(inputSource);
        // fDocumentSystemId = fEntityManager.expandSystemId(inputSource.getSystemId());
        setScannerState(XMLEvent.START_DOCUMENT);
    } // setInputSource(XMLInputSource)
    
    
    
    /**return the state of the scanner */
    public int getScannetState(){
        return fScannerState ;
    }
    
    
    
    
    public void reset(PropertyManager propertyManager) {
        super.reset(propertyManager);
        // other settings
        fDoctypeName = null;
        fDoctypePublicId = null;
        fDoctypeSystemId = null;
        fSeenDoctypeDecl = false;
        fNamespaceContext.reset();
        fDisallowDoctype = !((Boolean)propertyManager.getProperty(XMLInputFactory.SUPPORT_DTD)).booleanValue();
        
        // xerces features