xsdattributetraverser.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 com.sun.org.apache.xerces.internal.impl.dv.InvalidDatatypeValueException;
import com.sun.org.apache.xerces.internal.impl.dv.ValidatedInfo;
import com.sun.org.apache.xerces.internal.impl.dv.XSSimpleType;
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.XSAttributeDecl;
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.util.XInt;
import com.sun.org.apache.xerces.internal.util.DOMUtil;
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.xs.XSConstants;
import com.sun.org.apache.xerces.internal.xs.XSTypeDefinition;
import org.w3c.dom.Element;

/**
 * The attribute declaration schema component traverser.
 *
 * <attribute
 *   default = string
 *   fixed = string
 *   form = (qualified | unqualified)
 *   id = ID
 *   name = NCName
 *   ref = QName
 *   type = QName
 *   use = (optional | prohibited | required) : optional
 *   {any attributes with non-schema namespace . . .}>
 *   Content: (annotation?, (simpleType?))
 * </attribute>
 *
 * @xerces.internal 
 *
 * @author Sandy Gao, IBM
 * @author Neeraj Bajaj, Sun Microsystems, inc.
 * @version $Id: XSDAttributeTraverser.java,v 1.2.6.1 2005/09/08 14:08:22 sunithareddy Exp $
 */
class XSDAttributeTraverser extends XSDAbstractTraverser {
    
    public XSDAttributeTraverser (XSDHandler handler,
            XSAttributeChecker gAttrCheck) {
        super(handler, gAttrCheck);
    }
    
    protected XSAttributeUseImpl traverseLocal(Element attrDecl,
            XSDocumentInfo schemaDoc,
            SchemaGrammar grammar,
            XSComplexTypeDecl enclosingCT) {
        
        // General Attribute Checking
        Object[] attrValues = fAttrChecker.checkAttributes(attrDecl, false, schemaDoc);
        
        String defaultAtt = (String) attrValues[XSAttributeChecker.ATTIDX_DEFAULT];
        String fixedAtt   = (String) attrValues[XSAttributeChecker.ATTIDX_FIXED];
        String nameAtt    = (String) attrValues[XSAttributeChecker.ATTIDX_NAME];
        QName  refAtt     = (QName)  attrValues[XSAttributeChecker.ATTIDX_REF];
        XInt   useAtt     = (XInt)   attrValues[XSAttributeChecker.ATTIDX_USE];
        
        // get 'attribute declaration'
        XSAttributeDecl attribute = null;
        if (attrDecl.getAttributeNode(SchemaSymbols.ATT_REF) != null) {
            if (refAtt != null) {
                attribute = (XSAttributeDecl)fSchemaHandler.getGlobalDecl(schemaDoc, XSDHandler.ATTRIBUTE_TYPE, refAtt, attrDecl);
                
                Element child = DOMUtil.getFirstChildElement(attrDecl);
                if (child != null && DOMUtil.getLocalName(child).equals(SchemaSymbols.ELT_ANNOTATION)) {
                    // REVISIT:  put this somewhere
                    traverseAnnotationDecl(child, attrValues, false, schemaDoc);
                    child = DOMUtil.getNextSiblingElement(child);
                }
                
                if (child != null) {
                    reportSchemaError("src-attribute.3.2", new Object[]{refAtt.rawname}, child);
                }
                // for error reporting
                nameAtt = refAtt.localpart;
            } else {
                attribute = null;
            }
        } else {
            attribute = traverseNamedAttr(attrDecl, attrValues, schemaDoc, grammar, false, enclosingCT);
        }
        
        // get 'value constraint'
        short consType = XSConstants.VC_NONE;
        if (defaultAtt != null) {
            consType = XSConstants.VC_DEFAULT;
        } else if (fixedAtt != null) {
            consType = XSConstants.VC_FIXED;
            defaultAtt = fixedAtt;
            fixedAtt = null;
        }
        
        XSAttributeUseImpl attrUse = null;
        if (attribute != null) {
            if (fSchemaHandler.fDeclPool !=null) {
                attrUse = fSchemaHandler.fDeclPool.getAttributeUse();
            } else {
                attrUse = new XSAttributeUseImpl();
            }
            attrUse.fAttrDecl = attribute;
            attrUse.fUse = useAtt.shortValue();
            attrUse.fConstraintType = consType;
            if (defaultAtt != null) {
                attrUse.fDefault = new ValidatedInfo();
                attrUse.fDefault.normalizedValue = defaultAtt;
            }
        }
        
        //src-attribute
        
        // 1 default and fixed must not both be present.
        if (defaultAtt != null && fixedAtt != null) {
            reportSchemaError("src-attribute.1", new Object[]{nameAtt}, attrDecl);
        }
        
        // 2 If default and use are both present, use must have the actual value optional.
        if (consType == XSConstants.VC_DEFAULT &&
                useAtt != null && useAtt.intValue() != SchemaSymbols.USE_OPTIONAL) {
            reportSchemaError("src-attribute.2", new Object[]{nameAtt}, attrDecl);
        }
        
        // a-props-correct
        
        if (defaultAtt != null && attrUse != null) {
            // 2 if there is a {value constraint}, the canonical lexical representation of its value must be valid with respect to the {type definition} as defined in String Valid (3.14.4).
            fValidationState.setNamespaceSupport(schemaDoc.fNamespaceSupport);
            try {
                checkDefaultValid(attrUse);
            }
            catch (InvalidDatatypeValueException ide) {
                reportSchemaError (ide.getKey(), ide.getArgs(), attrDecl);
                reportSchemaError ("a-props-correct.2", new Object[]{nameAtt, defaultAtt}, attrDecl);
            }
            
            // 3 If the {type definition} is or is derived from ID then there must not be a {value constraint}.
            if (((XSSimpleType)attribute.getTypeDefinition()).isIDType() ) {
                reportSchemaError ("a-props-correct.3", new Object[]{nameAtt}, attrDecl);
            }
            
            // check 3.5.6 constraint
            // Attribute Use Correct
            // 2 If the {attribute declaration} has a fixed {value constraint}, then if the attribute use itself has a {value constraint}, it must also be fixed and its value must match that of the {attribute declaration}'s {value constraint}.
            if (attrUse.fAttrDecl.getConstraintType() == XSConstants.VC_FIXED &&
                    attrUse.fConstraintType != XSConstants.VC_NONE) {
                if (attrUse.fConstraintType != XSConstants.VC_FIXED ||
                        !attrUse.fAttrDecl.getValInfo().actualValue.equals(attrUse.fDefault.actualValue)) {
                    reportSchemaError ("au-props-correct.2", new Object[]{nameAtt, attrUse.fAttrDecl.getValInfo().stringValue()}, attrDecl);
                }
            }
        }
        
        fAttrChecker.returnAttrArray(attrValues, schemaDoc);
        return attrUse;
    }
    
    protected XSAttributeDecl traverseGlobal(Element attrDecl,
            XSDocumentInfo schemaDoc,
            SchemaGrammar grammar) {
        
        // General Attribute Checking
        Object[] attrValues = fAttrChecker.checkAttributes(attrDecl, true, schemaDoc);
        XSAttributeDecl attribute = traverseNamedAttr(attrDecl, attrValues, schemaDoc, grammar, true, null);
        fAttrChecker.returnAttrArray(attrValues, schemaDoc);
        return attribute;
        
    }
    
    /**
     * Traverse a globally declared attribute.
     *
     * @param  attrDecl
     * @param  attrValues
     * @param  schemaDoc
     * @param  grammar
     * @param  isGlobal
     * @return the attribute declaration index
     */
    XSAttributeDecl traverseNamedAttr(Element attrDecl,
            Object[] attrValues,
            XSDocumentInfo schemaDoc,
            SchemaGrammar grammar,
            boolean isGlobal,
            XSComplexTypeDecl enclosingCT) {
        
        String  defaultAtt = (String) attrValues[XSAttributeChecker.ATTIDX_DEFAULT];