xsdabstracttraverser.java

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/*
 * 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.impl.xs.traversers;

import java.util.Vector;

import com.sun.org.apache.xerces.internal.impl.dv.InvalidDatatypeValueException;
import com.sun.org.apache.xerces.internal.impl.dv.XSFacets;
import com.sun.org.apache.xerces.internal.impl.dv.XSSimpleType;
import com.sun.org.apache.xerces.internal.impl.validation.ValidationState;
import com.sun.org.apache.xerces.internal.impl.xs.SchemaGrammar;
import com.sun.org.apache.xerces.internal.impl.xs.SchemaSymbols;
import com.sun.org.apache.xerces.internal.impl.xs.XSAnnotationImpl;
import com.sun.org.apache.xerces.internal.impl.xs.XSAttributeGroupDecl;
import com.sun.org.apache.xerces.internal.impl.xs.XSAttributeUseImpl;
import com.sun.org.apache.xerces.internal.impl.xs.XSComplexTypeDecl;
import com.sun.org.apache.xerces.internal.impl.xs.XSElementDecl;
import com.sun.org.apache.xerces.internal.impl.xs.XSParticleDecl;
import com.sun.org.apache.xerces.internal.impl.xs.XSWildcardDecl;
import com.sun.org.apache.xerces.internal.xs.XSObjectList;
import com.sun.org.apache.xerces.internal.xs.XSTypeDefinition;
import com.sun.org.apache.xerces.internal.impl.xs.util.XInt;
import com.sun.org.apache.xerces.internal.impl.xs.util.XSObjectListImpl;
import com.sun.org.apache.xerces.internal.util.DOMUtil;
import com.sun.org.apache.xerces.internal.util.NamespaceSupport;
import com.sun.org.apache.xerces.internal.util.SymbolTable;
import com.sun.org.apache.xerces.internal.xni.QName;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.Text;

/**
 * Class <code>XSDAbstractTraverser</code> serves as the base class for all
 * other <code>XSD???Traverser</code>s. It holds the common data and provide
 * a unified way to initialize these data.
 *
 * @xerces.internal 
 *
 * @author Elena Litani, IBM
 * @author Rahul Srivastava, Sun Microsystems Inc.
 * @author Neeraj Bajaj, Sun Microsystems Inc.
 *
 * @version $Id: XSDAbstractTraverser.java,v 1.2.6.1 2005/09/08 12:01:12 sunithareddy Exp $
 */
abstract class XSDAbstractTraverser {
    
    protected static final String NO_NAME      = "(no name)";
    
    // Flags for checkOccurrences to indicate any special
    // restrictions on minOccurs and maxOccurs relating to "all".
    //    NOT_ALL_CONTEXT    - not processing an <all>
    //    PROCESSING_ALL_EL  - processing an <element> in an <all>
    //    GROUP_REF_WITH_ALL - processing <group> reference that contained <all>
    //    CHILD_OF_GROUP     - processing a child of a model group definition
    //    PROCESSING_ALL_GP  - processing an <all> group itself
    
    protected static final int NOT_ALL_CONTEXT    = 0;
    protected static final int PROCESSING_ALL_EL  = 1;
    protected static final int GROUP_REF_WITH_ALL = 2;
    protected static final int CHILD_OF_GROUP     = 4;
    protected static final int PROCESSING_ALL_GP  = 8;
    
    //Shared data
    protected XSDHandler            fSchemaHandler = null;
    protected SymbolTable           fSymbolTable = null;
    protected XSAttributeChecker    fAttrChecker = null;
    protected boolean               fValidateAnnotations = false;
    
    // used to validate default/fixed attribute values
    ValidationState fValidationState = new ValidationState();
    
    XSDAbstractTraverser (XSDHandler handler,
            XSAttributeChecker attrChecker) {
        fSchemaHandler = handler;
        fAttrChecker = attrChecker;
    }
    
    void reset(SymbolTable symbolTable, boolean validateAnnotations) {
        fSymbolTable = symbolTable;
        fValidateAnnotations = validateAnnotations;
        fValidationState.setExtraChecking(false);
        fValidationState.setSymbolTable(symbolTable);
    }
    
    // traverse the annotation declaration
    // REVISIT: how to pass the parentAttrs? as DOM attributes?
    //          as name/value pairs (string)? in parsed form?
    // @return XSAnnotationImpl object
    XSAnnotationImpl traverseAnnotationDecl(Element annotationDecl, Object[] parentAttrs,
            boolean isGlobal, XSDocumentInfo schemaDoc) {
        // General Attribute Checking
        Object[] attrValues = fAttrChecker.checkAttributes(annotationDecl, isGlobal, schemaDoc);
        fAttrChecker.returnAttrArray(attrValues, schemaDoc);
        
        String contents = null;
        Element child = DOMUtil.getFirstChildElement(annotationDecl);
        if (child != null) {
            do {
                String name = DOMUtil.getLocalName(child);
                
                // the only valid children of "annotation" are
                // "appinfo" and "documentation"
                if (!((name.equals(SchemaSymbols.ELT_APPINFO)) ||
                        (name.equals(SchemaSymbols.ELT_DOCUMENTATION)))) {
                    reportSchemaError("src-annotation", new Object[]{name}, child);
                } else { // the annotation, as we currently know it, is a Text child
                    Node textContent = child.getFirstChild();
                    if(textContent != null && textContent.getNodeType() == Node.TEXT_NODE) {
                        contents = ((Text)textContent).getData();
                    }
                }
                
                // General Attribute Checking
                // There is no difference between global or local appinfo/documentation,
                // so we assume it's always global.
                attrValues = fAttrChecker.checkAttributes(child, true, schemaDoc);
                fAttrChecker.returnAttrArray(attrValues, schemaDoc);
                
                child = DOMUtil.getNextSiblingElement(child);
            }
            while (child != null);
        }
        // REVISIT: When an annotation has no <documentation> or
        // <appinfo> children the text child is stored on the first child of its
        // parent. Only if the annotation is the first child will we find the
        // text node there. See SchemaDOM. We need to store the string representation
        // in a consistent place so it can be reliably retrieved, perhaps as 
        // user data. -- mrglavas
        else {
            Node textContent = annotationDecl.getFirstChild();
            if(textContent != null && textContent.getNodeType() == Node.TEXT_NODE) {
                contents = ((Text)textContent).getData();
            }
        }
        // if contents was null, must have been some kind of error;
        // nothing to contribute to PSVI
        if (contents == null) return null;
        
        // find the grammar; fSchemaHandler must be known!
        SchemaGrammar grammar = fSchemaHandler.getGrammar(schemaDoc.fTargetNamespace);
        // fish out local attributes passed from parent
        Vector annotationLocalAttrs = (Vector)parentAttrs[XSAttributeChecker.ATTIDX_NONSCHEMA];
        // optimize for case where there are no local attributes
        if(annotationLocalAttrs != null && !annotationLocalAttrs.isEmpty()) {
            StringBuffer localStrBuffer = new StringBuffer(64);
            localStrBuffer.append(" ");
            // Vector should contain rawname value pairs
            int i = 0;
            while (i < annotationLocalAttrs.size()) {
                String rawname = (String)annotationLocalAttrs.elementAt(i++);
                int colonIndex = rawname.indexOf(':');
                String prefix, localpart;
                if (colonIndex == -1) {
                    prefix = "";
                    localpart = rawname;
                }
                else {
                    prefix = rawname.substring(0,colonIndex);
                    localpart = rawname.substring(colonIndex+1);
                }
                String uri = schemaDoc.fNamespaceSupport.getURI(prefix.intern());
                if (!annotationDecl.getAttributeNS(uri, localpart).equals("")) {
                    i++; // skip the next value, too
                    continue;
                }
                localStrBuffer.append(rawname)
                .append("=\"");
                String value = (String)annotationLocalAttrs.elementAt(i++);
                // search for pesky "s and >s within attr value:
                value = processAttValue(value);
                localStrBuffer.append(value)
                .append("\" ");
            }
            // and now splice it into place; immediately after the annotation token, for simplicity's sake
            StringBuffer contentBuffer = new StringBuffer(contents.length() + localStrBuffer.length());
            int annotationTokenEnd = contents.indexOf(SchemaSymbols.ELT_ANNOTATION);
            // annotation must occur somewhere or we're in big trouble...
            if(annotationTokenEnd == -1) return null;
            annotationTokenEnd += SchemaSymbols.ELT_ANNOTATION.length();
            contentBuffer.append(contents.substring(0,annotationTokenEnd));
            contentBuffer.append(localStrBuffer.toString());
            contentBuffer.append(contents.substring(annotationTokenEnd, contents.length()));
            final String annotation = contentBuffer.toString();
            if (fValidateAnnotations) {
                schemaDoc.addAnnotation(new XSAnnotationInfo(annotation, annotationDecl));
            }
            return new XSAnnotationImpl(annotation, grammar);
        } else {
            if (fValidateAnnotations) {
                schemaDoc.addAnnotation(new XSAnnotationInfo(contents, annotationDecl));
            }
            return new XSAnnotationImpl(contents, grammar);
        }
        
    }
    
    XSAnnotationImpl traverseSyntheticAnnotation(Element annotationParent, String initialContent,
            Object[] parentAttrs, boolean isGlobal, XSDocumentInfo schemaDoc) {
        
        String contents = initialContent;
        
        // find the grammar; fSchemaHandler must be known!
        SchemaGrammar grammar = fSchemaHandler.getGrammar(schemaDoc.fTargetNamespace);
        // fish out local attributes passed from parent
        Vector annotationLocalAttrs = (Vector)parentAttrs[XSAttributeChecker.ATTIDX_NONSCHEMA];
        // optimize for case where there are no local attributes
        if (annotationLocalAttrs != null && !annotationLocalAttrs.isEmpty()) {
            StringBuffer localStrBuffer = new StringBuffer(64);
            localStrBuffer.append(" ");
            // Vector should contain rawname value pairs
            int i = 0;
            while (i < annotationLocalAttrs.size()) {
                String rawname = (String)annotationLocalAttrs.elementAt(i++);
                int colonIndex = rawname.indexOf(':');
                String prefix, localpart;
                if (colonIndex == -1) {
                    prefix = "";
                    localpart = rawname;
                }
                else {
                    prefix = rawname.substring(0,colonIndex);
                    localpart = rawname.substring(colonIndex+1);
                }
                String uri = schemaDoc.fNamespaceSupport.getURI(prefix.intern());
                localStrBuffer.append(rawname)
                .append("=\"");
                String value = (String)annotationLocalAttrs.elementAt(i++);
                // search for pesky "s and >s within attr value:
                value = processAttValue(value);
                localStrBuffer.append(value)
                .append("\" ");
            }
            // and now splice it into place; immediately after the annotation token, for simplicity's sake
            StringBuffer contentBuffer = new StringBuffer(contents.length() + localStrBuffer.length());
            int annotationTokenEnd = contents.indexOf(SchemaSymbols.ELT_ANNOTATION);
            // annotation must occur somewhere or we're in big trouble...
            if(annotationTokenEnd == -1) return null;
            annotationTokenEnd += SchemaSymbols.ELT_ANNOTATION.length();
            contentBuffer.append(contents.substring(0,annotationTokenEnd));
            contentBuffer.append(localStrBuffer.toString());
            contentBuffer.append(contents.substring(annotationTokenEnd, contents.length()));
            final String annotation = contentBuffer.toString();
            if (fValidateAnnotations) {
                schemaDoc.addAnnotation(new XSAnnotationInfo(annotation, annotationParent));
            }
            return new XSAnnotationImpl(annotation, grammar);
        } else {
            if (fValidateAnnotations) {
                schemaDoc.addAnnotation(new XSAnnotationInfo(contents, annotationParent));
            }
            return new XSAnnotationImpl(contents, grammar);
        }
    }
    
    // the QName simple type used to resolve qnames
    private static final XSSimpleType fQNameDV = (XSSimpleType)SchemaGrammar.SG_SchemaNS.getGlobalTypeDecl(SchemaSymbols.ATTVAL_QNAME);