Java example source code file (XSDAttributeTraverser.java)

This example Java source code file (XSDAttributeTraverser.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

dom, invaliddatatypevalueexception, object, qname, schemagrammar, string, validatedinfo, xint, xsattributedecl, xsattributeuseimpl, xscomplextypedecl, xsdattributetraverser, xsdocumentinfo, xsobjectlistimpl, xssimpletype

The XSDAttributeTraverser.java Java example source code

/*
 * reserved comment block
 * DO NOT REMOVE OR ALTER!
 */
/*
 * 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.impl.xs.util.XSObjectListImpl;
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.XSObjectList;
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 1.7 2010-11-01 04:40:02 joehw 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;
        XSAnnotationImpl annotation = 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)) {
                    annotation = traverseAnnotationDecl(child, attrValues, false, schemaDoc);
                    child = DOMUtil.getNextSiblingElement(child);
                }
                else {
                    String text = DOMUtil.getSyntheticAnnotation(attrDecl);
                    if (text != null) {
                        annotation = traverseSyntheticAnnotation(attrDecl, text, attrValues, false, schemaDoc);
                    }
                }

                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;
            }
            // Get the annotation associated witht the local attr decl
            if (attrDecl.getAttributeNode(SchemaSymbols.ATT_REF) == null) {
                attrUse.fAnnotations = attribute.getAnnotations();
            } else {
                XSObjectList annotations;
                if (annotation != null) {
                    annotations = new XSObjectListImpl();
                    ((XSObjectListImpl) annotations).addXSObject(annotation);
                } else {
                    annotations = XSObjectListImpl.EMPTY_LIST;
                }
                attrUse.fAnnotations = annotations;
            }
        }

        //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);
            // Recover by honouring the default value
            attrUse.fUse = SchemaSymbols.USE_OPTIONAL;
        }

        // 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);
                // Recover by removing the default value
                attrUse.fDefault = null;
                attrUse.fConstraintType = XSConstants.VC_NONE;
            }

            // 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);
                // Recover by removing the default value
                attrUse.fDefault = null;
                attrUse.fConstraintType = XSConstants.VC_NONE;
            }

            // 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);
                    // Recover by using the decl's {value constraint}
                    attrUse.fDefault = attrUse.fAttrDecl.getValInfo();
                    attrUse.fConstraintType = XSConstants.VC_FIXED;
                }
            }
        }

        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];
        String  fixedAtt   = (String) attrValues[XSAttributeChecker.ATTIDX_FIXED];
        XInt    formAtt    = (XInt)   attrValues[XSAttributeChecker.ATTIDX_FORM];
        String  nameAtt    = (String) attrValues[XSAttributeChecker.ATTIDX_NAME];
        QName   typeAtt    = (QName)  attrValues[XSAttributeChecker.ATTIDX_TYPE];

        // Step 1: get declaration information
        XSAttributeDecl attribute = null;
        if (fSchemaHandler.fDeclPool !=null) {
            attribute = fSchemaHandler.fDeclPool.getAttributeDecl();
        } else {
            attribute = new XSAttributeDecl();
        }

        // get 'name'
        if (nameAtt != null)
            nameAtt = fSymbolTable.addSymbol(nameAtt);

        // get 'target namespace'
        String tnsAtt = null;
        XSComplexTypeDecl enclCT = null;
        short scope = XSAttributeDecl.SCOPE_ABSENT;
        if (isGlobal) {
            tnsAtt = schemaDoc.fTargetNamespace;
            scope = XSAttributeDecl.SCOPE_GLOBAL;
        }
        else {
            if (enclosingCT != null) {
                enclCT = enclosingCT;
                scope = XSAttributeDecl.SCOPE_LOCAL;
            }
            if (formAtt != null) {
                if (formAtt.intValue() == SchemaSymbols.FORM_QUALIFIED)
                    tnsAtt = schemaDoc.fTargetNamespace;
            } else if (schemaDoc.fAreLocalAttributesQualified) {
                tnsAtt = schemaDoc.fTargetNamespace;
            }
        }
        // get 'value constraint'
        // for local named attribute, value constraint is absent
        ValidatedInfo attDefault = null;
        short constraintType = XSConstants.VC_NONE;
        if (isGlobal) {
            if (fixedAtt != null) {
                attDefault = new ValidatedInfo();
                attDefault.normalizedValue = fixedAtt;
                constraintType = XSConstants.VC_FIXED;
            } else if (defaultAtt != null) {
                attDefault = new ValidatedInfo();
                attDefault.normalizedValue = defaultAtt;
                constraintType = XSConstants.VC_DEFAULT;
            }
        }

        // get 'annotation'
        Element child = DOMUtil.getFirstChildElement(attrDecl);
        XSAnnotationImpl annotation = null;
        if (child != null && DOMUtil.getLocalName(child).equals(SchemaSymbols.ELT_ANNOTATION)) {
            annotation = traverseAnnotationDecl(child, attrValues, false, schemaDoc);
            child = DOMUtil.getNextSiblingElement(child);
        }
        else {
            String text = DOMUtil.getSyntheticAnnotation(attrDecl);
            if (text != null) {
                annotation = traverseSyntheticAnnotation(attrDecl, text, attrValues, false, schemaDoc);
            }
        }

        // get 'type definition'
        XSSimpleType attrType = null;
        boolean haveAnonType = false;

        // Handle Anonymous type if there is one
        if (child != null) {
            String childName = DOMUtil.getLocalName(child);

            if (childName.equals(SchemaSymbols.ELT_SIMPLETYPE)) {
                attrType = fSchemaHandler.fSimpleTypeTraverser.traverseLocal(child, schemaDoc, grammar);
                haveAnonType = true;
                child = DOMUtil.getNextSiblingElement(child);
            }
        }

        // Handle type attribute
        if (attrType == null && typeAtt != null) {
            XSTypeDefinition type = (XSTypeDefinition)fSchemaHandler.getGlobalDecl(schemaDoc, XSDHandler.TYPEDECL_TYPE, typeAtt, attrDecl);
            if (type != null && type.getTypeCategory() == XSTypeDefinition.SIMPLE_TYPE) {
                attrType = (XSSimpleType)type;
            }
            else {
                reportSchemaError("src-resolve", new Object[]{typeAtt.rawname, "simpleType definition"}, attrDecl);
                if (type == null) {
                        attribute.fUnresolvedTypeName = typeAtt;
                }
            }
        }

        if (attrType == null) {
            attrType = SchemaGrammar.fAnySimpleType;
        }

        XSObjectList annotations;
        if (annotation != null) {
            annotations = new XSObjectListImpl();
            ((XSObjectListImpl)annotations).addXSObject(annotation);
        } else {
            annotations = XSObjectListImpl.EMPTY_LIST;
        }
        attribute.setValues(nameAtt, tnsAtt, attrType, constraintType, scope,
                attDefault, enclCT, annotations);

        // Step 3: check against schema for schemas

        // required attributes
        if (nameAtt == null) {
            if (isGlobal)
                reportSchemaError("s4s-att-must-appear", new Object[]{SchemaSymbols.ELT_ATTRIBUTE, SchemaSymbols.ATT_NAME}, attrDecl);
            else
                reportSchemaError("src-attribute.3.1", null, attrDecl);
            nameAtt = NO_NAME;
        }

        // element
        if (child != null) {
            reportSchemaError("s4s-elt-must-match.1", new Object[]{nameAtt, "(annotation?, (simpleType?))", DOMUtil.getLocalName(child)}, child);
        }

        // Step 4: check 3.2.3 constraints

        // 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.
        // This is checked in "traverse" method

        // 3 If the item's parent is not <schema>, then all of the following must be true:
        // 3.1 One of ref or name must be present, but not both.
        // This is checked in XSAttributeChecker

        // 3.2 If ref is present, then all of <simpleType>, form and type must be absent.
        // Attributes are checked in XSAttributeChecker, elements are checked in "traverse" method

        // 4 type and <simpleType> must not both be present.
        if (haveAnonType && (typeAtt != null)) {
            reportSchemaError( "src-attribute.4", new Object[]{nameAtt}, attrDecl);
        }

        // Step 5: check 3.2.6 constraints
        // check for NOTATION type
        checkNotationType(nameAtt, attrType, attrDecl);

        // a-props-correct

        // 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).
        if (attDefault != null) {
            fValidationState.setNamespaceSupport(schemaDoc.fNamespaceSupport);
            try {
                checkDefaultValid(attribute);
            }
            catch (InvalidDatatypeValueException ide) {
                reportSchemaError (ide.getKey(), ide.getArgs(), attrDecl);
                reportSchemaError ("a-props-correct.2", new Object[]{nameAtt, attDefault.normalizedValue}, attrDecl);
                // Recover by removing the default value
                attDefault = null;
                constraintType = XSConstants.VC_NONE;
                attribute.setValues(nameAtt, tnsAtt, attrType, constraintType, scope,
                        attDefault, enclCT, annotations);
            }
        }

        // 3 If the {type definition} is or is derived from ID then there must not be a {value constraint}.
        if (attDefault != null) {
            if (attrType.isIDType() ) {
                reportSchemaError ("a-props-correct.3", new Object[]{nameAtt}, attrDecl);
                // Recover by removing the default value
                attDefault = null;
                constraintType = XSConstants.VC_NONE;
                attribute.setValues(nameAtt, tnsAtt, attrType, constraintType, scope,
                        attDefault, enclCT, annotations);
            }
        }

        // no-xmlns

        // The {name} of an attribute declaration must not match xmlns.
        if (nameAtt != null && nameAtt.equals(XMLSymbols.PREFIX_XMLNS)) {
            reportSchemaError("no-xmlns", null, attrDecl);
            return null;
        }

        // no-xsi

        // The {target namespace} of an attribute declaration, whether local or top-level, must not match http://www.w3.org/2001/XMLSchema-instance (unless it is one of the four built-in declarations given in the next section).
        if (tnsAtt != null && tnsAtt.equals(SchemaSymbols.URI_XSI)) {
            reportSchemaError("no-xsi", new Object[]{SchemaSymbols.URI_XSI}, attrDecl);
            return null;
        }

        // Attribute without a name. Return null.
        if (nameAtt.equals(NO_NAME))
            return null;

        // Step 2: register attribute decl to the grammar
        if (isGlobal) {
            if (grammar.getGlobalAttributeDecl(nameAtt) == null) {
                grammar.addGlobalAttributeDecl(attribute);
            }

            // also add it to extended map
            final String loc = fSchemaHandler.schemaDocument2SystemId(schemaDoc);
            final XSAttributeDecl attribute2 = grammar.getGlobalAttributeDecl(nameAtt, loc);
            if (attribute2  == null) {
                grammar.addGlobalAttributeDecl(attribute, loc);
            }

            if (fSchemaHandler.fTolerateDuplicates) {
                if (attribute2  != null) {
                    attribute = attribute2;
                }
                fSchemaHandler.addGlobalAttributeDecl(attribute);
            }
        }

        return attribute;
    }

    // throws an error if the constraint value is invalid for the given type
    void checkDefaultValid(XSAttributeDecl attribute) throws InvalidDatatypeValueException {
        // validate the original lexical rep, and set the actual value
        ((XSSimpleType)attribute.getTypeDefinition()).validate(attribute.getValInfo().normalizedValue, fValidationState, attribute.getValInfo());
        // validate the canonical lexical rep
        ((XSSimpleType)attribute.getTypeDefinition()).validate(attribute.getValInfo().stringValue(), fValidationState, attribute.getValInfo());
    }

    // throws an error if the constraint value is invalid for the given type
    void checkDefaultValid(XSAttributeUseImpl attrUse) throws InvalidDatatypeValueException {
        // validate the original lexical rep, and set the actual value
        ((XSSimpleType)attrUse.fAttrDecl.getTypeDefinition()).validate(attrUse.fDefault.normalizedValue, fValidationState, attrUse.fDefault);
        // validate the canonical lexical rep
        ((XSSimpleType)attrUse.fAttrDecl.getTypeDefinition()).validate(attrUse.fDefault.stringValue(), fValidationState, attrUse.fDefault);
    }

}