xsattributegroupdecl.java

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/*
 * The Apache Software License, Version 1.1
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 *
 * Copyright (c) 2001-2003 The Apache Software Foundation.  All rights
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 * modification, are permitted provided that the following conditions
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 * 1. Redistributions of source code must retain the above copyright
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 *       "This product includes software developed by the
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 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
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 * 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) 2001, International
 * Business Machines, Inc., http://www.apache.org.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
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package com.sun.org.apache.xerces.internal.impl.xs;

import com.sun.org.apache.xerces.internal.impl.dv.ValidatedInfo;
import com.sun.org.apache.xerces.internal.xs.XSAnnotation;
import com.sun.org.apache.xerces.internal.xs.XSAttributeGroupDefinition;
import com.sun.org.apache.xerces.internal.xs.XSAttributeUse;
import com.sun.org.apache.xerces.internal.xs.XSConstants;
import com.sun.org.apache.xerces.internal.xs.XSNamespaceItem;
import com.sun.org.apache.xerces.internal.xs.XSObjectList;
import com.sun.org.apache.xerces.internal.xs.XSWildcard;
import com.sun.org.apache.xerces.internal.impl.xs.util.XSObjectListImpl;

/**
 * The XML representation for an attribute group declaration
 * schema component is a global <attributeGroup> element information item
 *
 * @author Sandy Gao, IBM
 * @author Rahul Srivastava, Sun Microsystems Inc.
 *
 * @version $Id: XSAttributeGroupDecl.java,v 1.16 2003/11/11 20:14:58 sandygao Exp $
 */
public class XSAttributeGroupDecl implements XSAttributeGroupDefinition {

    // name of the attribute group
    public String fName = null;
    // target namespace of the attribute group
    public String fTargetNamespace = null;
    // number of attribute uses included by this attribute group
    int fAttrUseNum = 0;
    // attribute uses included by this attribute group
    private static final int INITIAL_SIZE = 5;
    XSAttributeUseImpl[] fAttributeUses = new XSAttributeUseImpl[INITIAL_SIZE];
    // attribute wildcard included by this attribute group
    public XSWildcardDecl fAttributeWC = null;
    // whether there is an attribute use whose type is or is derived from ID.
    public String fIDAttrName = null;

    // optional annotation
    public XSAnnotationImpl fAnnotation;
    
    protected XSObjectListImpl fAttrUses = null;

    // add an attribute use
    // if the type is derived from ID, but there is already another attribute
    // use of type ID, then return the name of the other attribute use;
    // otherwise, return null
    public String addAttributeUse(XSAttributeUseImpl attrUse) {

        if (fAttrUseNum == fAttributeUses.length) {
            fAttributeUses = resize(fAttributeUses, fAttrUseNum*2);
        }
        fAttributeUses[fAttrUseNum++] = attrUse;
        // if this attribute use is prohibited, then don't check whether it's
        // of type ID
        if (attrUse.fUse == SchemaSymbols.USE_PROHIBITED)
            return null;

        if (attrUse.fAttrDecl.fType.isIDType()) {
            // if there is already an attribute use of type ID, return it' sname
            if (fIDAttrName == null)
                fIDAttrName = attrUse.fAttrDecl.fName;
            else
                return fIDAttrName;
        }

        return null;
    }

    public XSAttributeUse getAttributeUse(String namespace, String name) {
        for (int i=0; i<fAttrUseNum; i++) {
            if ( (fAttributeUses[i].fAttrDecl.fTargetNamespace == namespace) &&
                 (fAttributeUses[i].fAttrDecl.fName == name) )
                return fAttributeUses[i];
        }

        return null;
    }

    public void removeProhibitedAttrs() {
        if (fAttrUseNum == 0) return;
        int pCount = 0;
        XSAttributeUseImpl[] pUses = new XSAttributeUseImpl[fAttrUseNum];
        for (int i = 0; i < fAttrUseNum; i++) {
            if (fAttributeUses[i].fUse == SchemaSymbols.USE_PROHIBITED) {
                pCount++;
                // we use the entries at the end, so that we can use the
                // first entries to store non-prohibited attribute uses,
                // hence avoid creating a new array.
                pUses[fAttrUseNum-pCount] = fAttributeUses[i];
            }
        }

        int newCount = 0;
        if (pCount > 0) {
            OUTER: for (int i = 0; i < fAttrUseNum; i++) {
                if (fAttributeUses[i].fUse == SchemaSymbols.USE_PROHIBITED)
                    continue;
                for (int j = 1; j <= pCount; j++) {
                    if (fAttributeUses[i].fAttrDecl.fName == pUses[fAttrUseNum-pCount].fAttrDecl.fName &&
                        fAttributeUses[i].fAttrDecl.fTargetNamespace == pUses[fAttrUseNum-pCount].fAttrDecl.fTargetNamespace) {
                        continue OUTER;
                    }
                }
                pUses[newCount++] = fAttributeUses[i];
            }
            fAttributeUses = pUses;
            fAttrUseNum = newCount;
        }
    }

    /**
     * Check that the attributes in this group validly restrict those from a base group.
     * If an error is found, an Object[] is returned. This contains the arguments for the error message
     * describing the error. The last element in the array (at index arr.length - 1) is the the error code.
     * Returns null if there is no error.
     * 
     * REVISIT: is there a better way of returning the appropriate information for the error?
     * 
     * @param typeName the name of the type containing this attribute group, used for error reporting purposes
     * @param baseGroup the XSAttributeGroupDecl that is the base we are checking against
     */
    public Object[] validRestrictionOf(String typeName, XSAttributeGroupDecl baseGroup) {

        Object[] errorArgs = null;
        XSAttributeUseImpl attrUse = null;
        XSAttributeDecl attrDecl = null;
        XSAttributeUseImpl baseAttrUse = null;
        XSAttributeDecl baseAttrDecl = null;

        for (int i=0; i<fAttrUseNum; i++) {

            attrUse = fAttributeUses[i];
            attrDecl = attrUse.fAttrDecl;

            // Look for a match in the base
            baseAttrUse = (XSAttributeUseImpl)baseGroup.getAttributeUse(attrDecl.fTargetNamespace,attrDecl.fName);
            if (baseAttrUse != null) {
                //
                // derivation-ok-restriction.  Constraint 2.1.1
                //

                if (baseAttrUse.getRequired() && !attrUse.getRequired()) {
                    errorArgs = new Object[]{typeName, attrDecl.fName,