xsdhandler.java

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/*
 * The Apache Software License, Version 1.1
 *
 *
 * Copyright (c) 1999-2004 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
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 *    permission, please contact [e-mail].
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 * 5. Products derived from this software may not be called "Apache",
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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.xs.traversers;

import java.io.IOException;
import java.util.Hashtable;
import java.util.Stack;
import java.util.Vector;

import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.sax.SAXSource;
import javax.xml.transform.sax.SAXResult;
import javax.xml.transform.stream.StreamSource;

import com.sun.org.apache.xerces.internal.impl.Constants;
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.xs.SchemaGrammar;
import com.sun.org.apache.xerces.internal.impl.xs.SchemaNamespaceSupport;
import com.sun.org.apache.xerces.internal.impl.xs.SchemaSymbols;
import com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaException;
import com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaLoader;
import com.sun.org.apache.xerces.internal.impl.xs.XSComplexTypeDecl;
import com.sun.org.apache.xerces.internal.impl.xs.XSDDescription;
import com.sun.org.apache.xerces.internal.impl.xs.XSDeclarationPool;
import com.sun.org.apache.xerces.internal.impl.xs.XSElementDecl;
import com.sun.org.apache.xerces.internal.impl.xs.XSGrammarBucket;
import com.sun.org.apache.xerces.internal.impl.xs.XSGroupDecl;
import com.sun.org.apache.xerces.internal.impl.xs.XSMessageFormatter;
import com.sun.org.apache.xerces.internal.impl.xs.XSModelGroupImpl;
import com.sun.org.apache.xerces.internal.impl.xs.XSParticleDecl;
import com.sun.org.apache.xerces.internal.impl.xs.opti.ElementImpl;
import com.sun.org.apache.xerces.internal.impl.xs.opti.SchemaDOM;
import com.sun.org.apache.xerces.internal.impl.xs.opti.SchemaDOMParser;
import com.sun.org.apache.xerces.internal.impl.xs.opti.SchemaParsingConfig;
import com.sun.org.apache.xerces.internal.impl.xs.util.SimpleLocator;
import com.sun.org.apache.xerces.internal.parsers.SAXParser;
import com.sun.org.apache.xerces.internal.util.DOMUtil;
import com.sun.org.apache.xerces.internal.util.SecurityManager;
import com.sun.org.apache.xerces.internal.util.SAX2XNI;
import com.sun.org.apache.xerces.internal.util.SymbolTable;
import com.sun.org.apache.xerces.internal.util.XMLInputSourceAdaptor;
import com.sun.org.apache.xerces.internal.util.XMLSymbols;
import com.sun.org.apache.xerces.internal.xni.QName;
import com.sun.org.apache.xerces.internal.xni.grammars.XMLGrammarPool;
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.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.xs.XSObject;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.xml.sax.XMLReader;
import org.xml.sax.SAXException;

/**
 * The purpose of this class is to co-ordinate the construction of a
 * grammar object corresponding to a schema.  To do this, it must be
 * prepared to parse several schema documents (for instance if the
 * schema document originally referred to contains <include> or
 * <redefined> information items).  If any of the schemas imports a
 * schema, other grammars may be constructed as a side-effect.
 *
 * @author Neil Graham, IBM
 * @author Pavani Mukthipudi, Sun Microsystems
 * @version $Id: XSDHandler.java,v 1.75 2004/02/03 17:27:45 sandygao Exp $
 */
public class XSDHandler {

    /** 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:  allow java encodings */
    protected static final String STANDARD_URI_CONFORMANT_FEATURE =
        Constants.XERCES_FEATURE_PREFIX + Constants.STANDARD_URI_CONFORMANT_FEATURE;
        
    /** Feature: disallow doctype*/
    protected static final String DISALLOW_DOCTYPE = 
        Constants.XERCES_FEATURE_PREFIX + Constants.DISALLOW_DOCTYPE_DECL_FEATURE;      

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

    /** Property identifier: JAXP schema source. */
    protected static final String JAXP_SCHEMA_SOURCE =
        Constants.JAXP_PROPERTY_PREFIX + Constants.SCHEMA_SOURCE;

    /** Property identifier: entity resolver. */
    public static final String ENTITY_RESOLVER =
    Constants.XERCES_PROPERTY_PREFIX + Constants.ENTITY_RESOLVER_PROPERTY;
    
    private static final String SECURE_PROCESSING =
        Constants.XERCES_PROPERTY_PREFIX + Constants.SECURITY_MANAGER_PROPERTY;
    
    /** Property identifier: entity manager. */
    protected static final String ENTITY_MANAGER =
            Constants.XERCES_PROPERTY_PREFIX + Constants.ENTITY_MANAGER_PROPERTY; 
    
    /** Property identifier: error reporter. */
    public static final String ERROR_REPORTER =
        Constants.XERCES_PROPERTY_PREFIX + Constants.ERROR_REPORTER_PROPERTY;
        
    /** Property identifier: grammar pool. */
    public static final String XMLGRAMMAR_POOL =
        Constants.XERCES_PROPERTY_PREFIX + Constants.XMLGRAMMAR_POOL_PROPERTY;
        
    /** Property identifier: symbol table. */
    public static final String SYMBOL_TABLE =
        Constants.XERCES_PROPERTY_PREFIX + Constants.SYMBOL_TABLE_PROPERTY;
        
    protected static final String SECURITY_MANAGER =
        Constants.XERCES_PROPERTY_PREFIX + Constants.SECURITY_MANAGER_PROPERTY; 

    /**
     * Property identifier: security manager.
     */
    protected static final boolean DEBUG_NODE_POOL = false;
                              
    // Data

    // different sorts of declarations; should make lookup and
    // traverser calling more efficient/less bulky.
    final static int ATTRIBUTE_TYPE          = 1;
    final static int ATTRIBUTEGROUP_TYPE     = 2;
    final static int ELEMENT_TYPE            = 3;
    final static int GROUP_TYPE              = 4;
    final static int IDENTITYCONSTRAINT_TYPE = 5;
    final static int NOTATION_TYPE           = 6;
    final static int TYPEDECL_TYPE           = 7;

    // this string gets appended to redefined names; it's purpose is to be
    // as unlikely as possible to cause collisions.
    public final static String REDEF_IDENTIFIER = "_fn3dktizrknc9pi";

    //
    //protected data that can be accessable by any traverser
    // stores <notation> decl
    protected Hashtable fNotationRegistry = new Hashtable();

    protected XSDeclarationPool fDeclPool = null;

    // are java encodings allowed?
    private boolean fAllowJavaEncodings = false;
    
    // enforcing strict uri?
    private boolean fStrictURI = false;
    
    /**
     * <p>Security manager in effect.</p>
     * 
     * <p>Protected to allow access by any traverser.</p>
     */
    protected SecurityManager fSecureProcessing = null;

    // These tables correspond to the symbol spaces defined in the
    // spec.
    // They are keyed with a QName (that is, String("URI,localpart) and
    // their values are nodes corresponding to the given name's decl.
    // By asking the node for its ownerDocument and looking in
    // XSDocumentInfoRegistry we can easily get the corresponding
    // XSDocumentInfo object.
    private Hashtable fUnparsedAttributeRegistry = new Hashtable();
    private Hashtable fUnparsedAttributeGroupRegistry = new Hashtable();
    private Hashtable fUnparsedElementRegistry = new Hashtable();
    private Hashtable fUnparsedGroupRegistry = new Hashtable();
    private Hashtable fUnparsedIdentityConstraintRegistry = new Hashtable();
    private Hashtable fUnparsedNotationRegistry = new Hashtable();
    private Hashtable fUnparsedTypeRegistry = new Hashtable();
    // this is keyed with a documentNode (or the schemaRoot nodes
    // contained in the XSDocumentInfo objects) and its value is the
    // XSDocumentInfo object corresponding to that document.
    // Basically, the function of this registry is to be a link
    // between the nodes we fetch from calls to the fUnparsed*
    // arrays and the XSDocumentInfos they live in.
    private Hashtable fXSDocumentInfoRegistry = new Hashtable();

    // this hashtable is keyed on by XSDocumentInfo objects.  Its values
    // are Vectors containing the XSDocumentInfo objects <include>d,
    // <import>ed or <redefine>d by the key XSDocumentInfo.
    private Hashtable fDependencyMap = new Hashtable();

    // this hashtable is keyed on by a target namespace.  Its values
    // are Vectors containing namespaces imported by schema documents
    // with the key target namespace.
    // if an imprted schema has absent namespace, the value "null" is stored.
    private Hashtable fImportMap = new Hashtable();
    // all namespaces that imports other namespaces
    // if the importing schema has absent namespace, empty string is stored.
    // (because the key of a hashtable can't be null.)
    private Vector fAllTNSs = new Vector();
    // stores instance document mappings between namespaces and schema hints
    private Hashtable fLocationPairs = null;

    // convenience methods
    private String null2EmptyString(String ns) {
        return ns == null ? XMLSymbols.EMPTY_STRING : ns;
    }