xsattributechecker.java

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/*
 * The Apache Software License, Version 1.1
 *
 *
 * Copyright (c) 2001-2004 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.
 *1
 * 4. The names "Xerces" and "Apache Software Foundation" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written
 *    permission, please contact [e-mail].
 *
 * 5. Products derived from this software may not be called "Apache",
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 *    permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * 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) 2001, 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.util.Enumeration;
import java.util.Hashtable;
import java.util.Locale;
import java.util.StringTokenizer;
import java.util.Vector;

import com.sun.org.apache.xerces.internal.impl.dv.InvalidDatatypeValueException;
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.SchemaNamespaceSupport;
import com.sun.org.apache.xerces.internal.impl.xs.SchemaSymbols;
import com.sun.org.apache.xerces.internal.impl.xs.XSAttributeDecl;
import com.sun.org.apache.xerces.internal.impl.xs.XSGrammarBucket;
import com.sun.org.apache.xerces.internal.impl.xs.XSWildcardDecl;
import com.sun.org.apache.xerces.internal.xs.XSConstants;
import com.sun.org.apache.xerces.internal.impl.xs.util.XInt;
import com.sun.org.apache.xerces.internal.impl.xs.util.XIntPool;
import com.sun.org.apache.xerces.internal.util.DOMUtil;
import com.sun.org.apache.xerces.internal.util.SymbolTable;
import com.sun.org.apache.xerces.internal.util.XMLSymbols;
import com.sun.org.apache.xerces.internal.xni.QName;
import org.w3c.dom.Attr;
import org.w3c.dom.Element;

/**
 * Class <code>XSAttributeCheck</code> is used to check the validity of attributes
 * appearing in the schema document. It
 * - reports an error for invalid element (invalid namespace, invalid name)
 * - reports an error for invalid attribute (invalid namespace, invalid name)
 * - reports an error for invalid attribute value
 * - return compiled values for attriute values
 * - provide default value for missing optional attributes
 * - provide default value for incorrect attribute values
 *
 * But it's the caller's responsibility to check whether a required attribute
 * is present.
 *
 * Things need revisiting:
 * - Whether to return non-schema attributes/values
 * - Do we need to update NamespaceScope and ErrorReporter when reset()?
 * - Should have the datatype validators return compiled value
 * - use symbol table instead of many hashtables
 *
 * @author Sandy Gao, IBM
 * @version $Id: XSAttributeChecker.java,v 1.30 2004/01/29 20:32:05 sandygao Exp $
 */

public class XSAttributeChecker {

    // REVISIT: only local element and attribute are different from others.
    //          it's possible to have either name or ref. all the others
    //          are only allowed to have one of name or ref, or neither of them.
    //          we'd better move such checking to the traverser.
    private static final String ELEMENT_N = "element_n";
    private static final String ELEMENT_R = "element_r";
    private static final String ATTRIBUTE_N = "attribute_n";
    private static final String ATTRIBUTE_R = "attribute_r";

    private static       int ATTIDX_COUNT           = 0;
    public static final int ATTIDX_ABSTRACT        = ATTIDX_COUNT++;
    public static final int ATTIDX_AFORMDEFAULT    = ATTIDX_COUNT++;
    public static final int ATTIDX_BASE            = ATTIDX_COUNT++;
    public static final int ATTIDX_BLOCK           = ATTIDX_COUNT++;
    public static final int ATTIDX_BLOCKDEFAULT    = ATTIDX_COUNT++;
    public static final int ATTIDX_DEFAULT         = ATTIDX_COUNT++;
    public static final int ATTIDX_EFORMDEFAULT    = ATTIDX_COUNT++;
    public static final int ATTIDX_FINAL           = ATTIDX_COUNT++;
    public static final int ATTIDX_FINALDEFAULT    = ATTIDX_COUNT++;
    public static final int ATTIDX_FIXED           = ATTIDX_COUNT++;
    public static final int ATTIDX_FORM            = ATTIDX_COUNT++;
    public static final int ATTIDX_ID              = ATTIDX_COUNT++;
    public static final int ATTIDX_ITEMTYPE        = ATTIDX_COUNT++;
    public static final int ATTIDX_MAXOCCURS       = ATTIDX_COUNT++;
    public static final int ATTIDX_MEMBERTYPES     = ATTIDX_COUNT++;
    public static final int ATTIDX_MINOCCURS       = ATTIDX_COUNT++;
    public static final int ATTIDX_MIXED           = ATTIDX_COUNT++;
    public static final int ATTIDX_NAME            = ATTIDX_COUNT++;
    public static final int ATTIDX_NAMESPACE       = ATTIDX_COUNT++;
    public static final int ATTIDX_NAMESPACE_LIST  = ATTIDX_COUNT++;
    public static final int ATTIDX_NILLABLE        = ATTIDX_COUNT++; 
    public static final int ATTIDX_NONSCHEMA       = ATTIDX_COUNT++;
    public static final int ATTIDX_PROCESSCONTENTS = ATTIDX_COUNT++;
    public static final int ATTIDX_PUBLIC          = ATTIDX_COUNT++;
    public static final int ATTIDX_REF             = ATTIDX_COUNT++;
    public static final int ATTIDX_REFER           = ATTIDX_COUNT++;
    public static final int ATTIDX_SCHEMALOCATION  = ATTIDX_COUNT++;
    public static final int ATTIDX_SOURCE          = ATTIDX_COUNT++;
    public static final int ATTIDX_SUBSGROUP       = ATTIDX_COUNT++;
    public static final int ATTIDX_SYSTEM          = ATTIDX_COUNT++;
    public static final int ATTIDX_TARGETNAMESPACE = ATTIDX_COUNT++;
    public static final int ATTIDX_TYPE            = ATTIDX_COUNT++;
    public static final int ATTIDX_USE             = ATTIDX_COUNT++;
    public static final int ATTIDX_VALUE           = ATTIDX_COUNT++;
    public static final int ATTIDX_ENUMNSDECLS     = ATTIDX_COUNT++;
    public static final int ATTIDX_VERSION         = ATTIDX_COUNT++;
    public static final int ATTIDX_XPATH           = ATTIDX_COUNT++;
    public static final int ATTIDX_FROMDEFAULT     = ATTIDX_COUNT++;
    //public static final int ATTIDX_OTHERVALUES     = ATTIDX_COUNT++;
    public static final int ATTIDX_ISRETURNED      = ATTIDX_COUNT++;

    private static final XIntPool fXIntPool = new XIntPool();
    // constants to return
    private static final XInt INT_QUALIFIED      = fXIntPool.getXInt(SchemaSymbols.FORM_QUALIFIED);
    private static final XInt INT_UNQUALIFIED    = fXIntPool.getXInt(SchemaSymbols.FORM_UNQUALIFIED);
    private static final XInt INT_EMPTY_SET      = fXIntPool.getXInt(XSConstants.DERIVATION_NONE);
    private static final XInt INT_ANY_STRICT     = fXIntPool.getXInt(XSWildcardDecl.PC_STRICT);
    private static final XInt INT_ANY_LAX        = fXIntPool.getXInt(XSWildcardDecl.PC_LAX);
    private static final XInt INT_ANY_SKIP       = fXIntPool.getXInt(XSWildcardDecl.PC_SKIP);
    private static final XInt INT_ANY_ANY        = fXIntPool.getXInt(XSWildcardDecl.NSCONSTRAINT_ANY);
    private static final XInt INT_ANY_LIST       = fXIntPool.getXInt(XSWildcardDecl.NSCONSTRAINT_LIST);
    private static final XInt INT_ANY_NOT        = fXIntPool.getXInt(XSWildcardDecl.NSCONSTRAINT_NOT);
    private static final XInt INT_USE_OPTIONAL   = fXIntPool.getXInt(SchemaSymbols.USE_OPTIONAL);
    private static final XInt INT_USE_REQUIRED   = fXIntPool.getXInt(SchemaSymbols.USE_REQUIRED);
    private static final XInt INT_USE_PROHIBITED = fXIntPool.getXInt(SchemaSymbols.USE_PROHIBITED);
    private static final XInt INT_WS_PRESERVE    = fXIntPool.getXInt(XSSimpleType.WS_PRESERVE);
    private static final XInt INT_WS_REPLACE     = fXIntPool.getXInt(XSSimpleType.WS_REPLACE);
    private static final XInt INT_WS_COLLAPSE    = fXIntPool.getXInt(XSSimpleType.WS_COLLAPSE);
    private static final XInt INT_UNBOUNDED      = fXIntPool.getXInt(SchemaSymbols.OCCURRENCE_UNBOUNDED);

    // used to store the map from element name to attribute list
    // for 14 global elements
    private static final Hashtable fEleAttrsMapG = new Hashtable(29);
    // for 39 local elememnts
    private static final Hashtable fEleAttrsMapL = new Hashtable(79);

    // used to initialize fEleAttrsMap
    // step 1: all possible data types
    // DT_??? >= 0 : validate using a validator, which is initialized staticly
    // DT_??? <  0 : validate directly, which is done in "validate()"

    protected static final int DT_ANYURI           = 0;
    protected static final int DT_ID               = 1;
    protected static final int DT_QNAME            = 2;
    protected static final int DT_STRING           = 3;
    protected static final int DT_TOKEN            = 4;
    protected static final int DT_NCNAME           = 5;
    protected static final int DT_XPATH            = 6;
    protected static final int DT_XPATH1           = 7;

    // used to store extra datatype validators
    protected static final int DT_COUNT            = DT_XPATH1 + 1;
    private static final XSSimpleType[] fExtraDVs = new XSSimpleType[DT_COUNT];
    static {
        // step 5: register all datatype validators for new types
        SchemaGrammar grammar = SchemaGrammar.SG_SchemaNS;
        // anyURI
        fExtraDVs[DT_ANYURI] = (XSSimpleType)grammar.getGlobalTypeDecl(SchemaSymbols.ATTVAL_ANYURI);
        // ID
        fExtraDVs[DT_ID] = (XSSimpleType)grammar.getGlobalTypeDecl(SchemaSymbols.ATTVAL_ID);
        // QName
        fExtraDVs[DT_QNAME] = (XSSimpleType)grammar.getGlobalTypeDecl(SchemaSymbols.ATTVAL_QNAME);
        // string
        fExtraDVs[DT_STRING] = (XSSimpleType)grammar.getGlobalTypeDecl(SchemaSymbols.ATTVAL_STRING);
        // token
        fExtraDVs[DT_TOKEN] = (XSSimpleType)grammar.getGlobalTypeDecl(SchemaSymbols.ATTVAL_TOKEN);
        // NCName
        fExtraDVs[DT_NCNAME] = (XSSimpleType)grammar.getGlobalTypeDecl(SchemaSymbols.ATTVAL_NCNAME);
        // xpath = a subset of XPath expression
        fExtraDVs[DT_XPATH] = fExtraDVs[DT_STRING];
        // xpath = a subset of XPath expression
        fExtraDVs[DT_XPATH] = fExtraDVs[DT_STRING];
    }

    protected static final int DT_BLOCK            = -1;
    protected static final int DT_BLOCK1           = -2;
    protected static final int DT_FINAL            = -3;
    protected static final int DT_FINAL1           = -4;
    protected static final int DT_FINAL2           = -5;
    protected static final int DT_FORM             = -6;
    protected static final int DT_MAXOCCURS        = -7;
    protected static final int DT_MAXOCCURS1       = -8;
    protected static final int DT_MEMBERTYPES      = -9;
    protected static final int DT_MINOCCURS1       = -10;
    protected static final int DT_NAMESPACE        = -11;
    protected static final int DT_PROCESSCONTENTS  = -12;
    protected static final int DT_USE              = -13;
    protected static final int DT_WHITESPACE       = -14;
    protected static final int DT_BOOLEAN          = -15;
    protected static final int DT_NONNEGINT        = -16;
    protected static final int DT_POSINT           = -17;

    static {
        // step 2: all possible attributes for all elements
        int attCount = 0;
        int ATT_ABSTRACT_D          = attCount++;
        int ATT_ATTRIBUTE_FD_D      = attCount++;
        int ATT_BASE_R              = attCount++;
        int ATT_BASE_N              = attCount++;
        int ATT_BLOCK_N             = attCount++;
        int ATT_BLOCK1_N            = attCount++;
        int ATT_BLOCK_D_D           = attCount++;
        int ATT_DEFAULT_N           = attCount++;
        int ATT_ELEMENT_FD_D        = attCount++;
        int ATT_FINAL_N             = attCount++;