File	Doc	Category	Size	Date	Package
SubstitutionGroupHandler.java	API Doc	Java SE 6 API	14285	Tue Jun 10 00:22:44 BST 2008	com.sun.org.apache.xerces.internal.impl.xs

SubstitutionGroupHandler

• java.lang.Object

Fields Summary
private static final XSElementDecl[]	EMPTY_GROUP
XSGrammarBucket	fGrammarBucket
Hashtable	fSubGroupsB
private static final OneSubGroup[]	EMPTY_VECTOR
Hashtable	fSubGroups

Constructors Summary
public SubstitutionGroupHandler(XSGrammarBucket grammarBucket) Default constructor fGrammarBucket = grammarBucket;

Methods Summary
public void	addSubstitutionGroup(com.sun.org.apache.xerces.internal.impl.xs.XSElementDecl[] elements) add a list of substitution group information. XSElementDecl subHead, element; Vector subGroup; // for all elements with substitution group affiliation for (int i = elements.length-1; i >= 0; i--) { element = elements[i]; subHead = element.fSubGroup; // check whether this an entry for this element subGroup = (Vector)fSubGroupsB.get(subHead); if (subGroup == null) { // if not, create a new one subGroup = new Vector(); fSubGroupsB.put(subHead, subGroup); } // add to the vactor subGroup.addElement(element); }
private boolean	getDBMethods(com.sun.org.apache.xerces.internal.xs.XSTypeDefinition typed, com.sun.org.apache.xerces.internal.xs.XSTypeDefinition typeb, com.sun.org.apache.xerces.internal.impl.xs.SubstitutionGroupHandler$OneSubGroup methods) short dMethod = 0, bMethod = 0; while (typed != typeb && typed != SchemaGrammar.fAnyType) { if (typed.getTypeCategory() == XSTypeDefinition.COMPLEX_TYPE) dMethod |= ((XSComplexTypeDecl)typed).fDerivedBy; else dMethod |= XSConstants.DERIVATION_RESTRICTION; typed = typed.getBaseType(); // type == null means the current type is anySimpleType, // whose base type should be anyType if (typed == null) typed = SchemaGrammar.fAnyType; if (typed.getTypeCategory() == XSTypeDefinition.COMPLEX_TYPE) bMethod |= ((XSComplexTypeDecl)typed).fBlock; } // No derivation relation, or blocked, return false if (typed != typeb || (dMethod & bMethod) != 0) return false; // Remember the derivation methods and blocks, return true. methods.dMethod = dMethod; methods.bMethod = bMethod; return true;
public com.sun.org.apache.xerces.internal.impl.xs.XSElementDecl	getMatchingElemDecl(com.sun.org.apache.xerces.internal.xni.QName element, com.sun.org.apache.xerces.internal.impl.xs.XSElementDecl exemplar) if (element.localpart == exemplar.fName && element.uri == exemplar.fTargetNamespace) { return exemplar; } // if the exemplar is not a global element decl, then it's not possible // to be substituted by another element. if (exemplar.fScope != XSConstants.SCOPE_GLOBAL) return null; // if the decl blocks substitution, return false if ((exemplar.fBlock & XSConstants.DERIVATION_SUBSTITUTION) != 0) return null; // get grammar of the element SchemaGrammar sGrammar = fGrammarBucket.getGrammar(element.uri); if (sGrammar == null) return null; // get the decl for the element XSElementDecl eDecl = sGrammar.getGlobalElementDecl(element.localpart); if (eDecl == null) return null; // and check by using substitutionGroup information if (substitutionGroupOK(eDecl, exemplar, exemplar.fBlock)) return eDecl; return null;
private com.sun.org.apache.xerces.internal.impl.xs.SubstitutionGroupHandler$OneSubGroup[]	getSubGroupB(com.sun.org.apache.xerces.internal.impl.xs.XSElementDecl element, com.sun.org.apache.xerces.internal.impl.xs.SubstitutionGroupHandler$OneSubGroup methods) Object subGroup = fSubGroupsB.get(element); // substitution group for this one is empty if (subGroup == null) { fSubGroupsB.put(element, EMPTY_VECTOR); return EMPTY_VECTOR; } // we've already calculated the element, just return. if (subGroup instanceof OneSubGroup[]) return (OneSubGroup[])subGroup; // we only have the *direct* substitutions Vector group = (Vector)subGroup, newGroup = new Vector(); OneSubGroup[] group1; // then for each of the direct substitutions, get its substitution // group, and combine the groups together. short dMethod, bMethod, dSubMethod, bSubMethod; for (int i = group.size()-1, j; i >= 0; i--) { // Check whether this element is blocked. If so, ignore it. XSElementDecl sub = (XSElementDecl)group.elementAt(i); if (!getDBMethods(sub.fType, element.fType, methods)) continue; // Remember derivation methods and blocks from the types dMethod = methods.dMethod; bMethod = methods.bMethod; // Add this one to potential group newGroup.addElement(new OneSubGroup(sub, methods.dMethod, methods.bMethod)); // Get potential group for this element group1 = getSubGroupB(sub, methods); for (j = group1.length-1; j >= 0; j--) { // For each of them, check whether it's blocked (by type) dSubMethod = (short)(dMethod | group1[j].dMethod); bSubMethod = (short)(bMethod | group1[j].bMethod); // Ignore it if it's blocked if ((dSubMethod & bSubMethod) != 0) continue; newGroup.addElement(new OneSubGroup(group1[j].sub, dSubMethod, bSubMethod)); } } // Convert to an array OneSubGroup[] ret = new OneSubGroup[newGroup.size()]; for (int i = newGroup.size()-1; i >= 0; i--) { ret[i] = (OneSubGroup)newGroup.elementAt(i); } // Store the potential sub group fSubGroupsB.put(element, ret); return ret;
public com.sun.org.apache.xerces.internal.impl.xs.XSElementDecl[]	getSubstitutionGroup(com.sun.org.apache.xerces.internal.impl.xs.XSElementDecl element) get all elements that can substitute the given element, according to the spec, we shouldn't consider the {block} constraints. from the spec, substitution group of a given element decl also contains the element itself. but the array returned from this method doesn't containt this element. // If we already have sub group for this element, just return it. Object subGroup = fSubGroups.get(element); if (subGroup != null) return (XSElementDecl[])subGroup; if ((element.fBlock & XSConstants.DERIVATION_SUBSTITUTION) != 0) { fSubGroups.put(element, EMPTY_GROUP); return EMPTY_GROUP; } // Otherwise, get all potential sub group elements // (without considering "block" on this element OneSubGroup[] groupB = getSubGroupB(element, new OneSubGroup()); int len = groupB.length, rlen = 0; XSElementDecl[] ret = new XSElementDecl[len]; // For each of such elements, check whether the derivation methods // overlap with "block". If not, add it to the sub group for (int i = 0 ; i < len; i++) { if ((element.fBlock & groupB[i].dMethod) == 0) ret[rlen++] = groupB[i].sub; } // Resize the array if necessary if (rlen < len) { XSElementDecl[] ret1 = new XSElementDecl[rlen]; System.arraycopy(ret, 0, ret1, 0, rlen); ret = ret1; } // Store the subgroup fSubGroups.put(element, ret); return ret;
public boolean	inSubstitutionGroup(com.sun.org.apache.xerces.internal.impl.xs.XSElementDecl element, com.sun.org.apache.xerces.internal.impl.xs.XSElementDecl exemplar) // [Definition:] Every element declaration (call this HEAD) in the {element declarations} of a schema defines a substitution group, a subset of those {element declarations}, as follows: // Define PSG, the potential substitution group for HEAD, as follows: // 1 The element declaration itself is in PSG; // 2 PSG is closed with respect to {substitution group affiliation}, that is, if any element declaration in the {element declarations} has a {substitution group affiliation} in PSG, then it is also in PSG itself. // HEAD's actual substitution group is then the set consisting of each member of PSG such that all of the following must be true: // 1 Its {abstract} is false. // 2 It is validly substitutable for HEAD subject to an empty blocking constraint, as defined in Substitution Group OK (Transitive) (3.3.6). return substitutionGroupOK(element, exemplar, exemplar.fBlock);
public void	reset() clear the internal registry of substitutionGroup information fSubGroupsB.clear(); fSubGroups.clear();
protected boolean	substitutionGroupOK(com.sun.org.apache.xerces.internal.impl.xs.XSElementDecl element, com.sun.org.apache.xerces.internal.impl.xs.XSElementDecl exemplar, short blockingConstraint) // For an element declaration (call it D) to be validly substitutable for another element declaration (call it C) subject to a blocking constraint (a subset of {substitution, extension, restriction}, the value of a {disallowed substitutions}) one of the following must be true: // 1. D and C are the same element declaration. if (element == exemplar) return true; // 2 All of the following must be true: // 2.1 The blocking constraint does not contain substitution. if ((blockingConstraint & XSConstants.DERIVATION_SUBSTITUTION) != 0) return false; // 2.2 There is a chain of {substitution group affiliation}s from D to C, that is, either D's {substitution group affiliation} is C, or D's {substitution group affiliation}'s {substitution group affiliation} is C, or . . . XSElementDecl subGroup = element.fSubGroup; while (subGroup != null && subGroup != exemplar) { subGroup = subGroup.fSubGroup; } if (subGroup == null) return false; // 2.3 The set of all {derivation method}s involved in the derivation of D's {type definition} from C's {type definition} does not intersect with the union of the blocking constraint, C's {prohibited substitutions} (if C is complex, otherwise the empty set) and the {prohibited substitutions} (respectively the empty set) of any intermediate {type definition}s in the derivation of D's {type definition} from C's {type definition}. // prepare the combination of {derivation method} and // {disallowed substitution} short devMethod = 0, blockConstraint = blockingConstraint; // element.fType should be derived from exemplar.fType // add derivation methods of derived types to devMethod; // add block of base types to blockConstraint. XSTypeDefinition type = element.fType; while (type != exemplar.fType && type != SchemaGrammar.fAnyType) { if (type.getTypeCategory() == XSTypeDefinition.COMPLEX_TYPE) devMethod |= ((XSComplexTypeDecl)type).fDerivedBy; else devMethod |= XSConstants.DERIVATION_RESTRICTION; type = type.getBaseType(); // type == null means the current type is anySimpleType, // whose base type should be anyType if (type == null) type = SchemaGrammar.fAnyType; if (type.getTypeCategory() == XSTypeDefinition.COMPLEX_TYPE) blockConstraint |= ((XSComplexTypeDecl)type).fBlock; } if (type != exemplar.fType) return false; if ((devMethod & blockConstraint) != 0) return false; return true;