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Xerces2 is the next generation of high performance, fully compliant XML parsers in the Apache Xerces family.
This new version of Xerces introduces the Xerces Native Interface (XNI), a complete framework for building
parser components and configurations that is extremely modular and easy to program. The Apache Xerces2 parser is
the reference implementation of XNI but other parser components, configurations, and parsers can be written
using the Xerces Native Interface. For complete design and implementation documents, refer to the XNI Manual.
Xerces2 is a fully conforming XML Schema 1.0 processor. A partial experimental implementation of the XML Schema
1.1 Structures and Datatypes Working Drafts (December 2009) and an experimental implementation of the XML Schema
Definition Language (XSD): Component Designators (SCD) Candidate Recommendation (January 2010) are provided for
evaluation. For more information, refer to the XML Schema page. Xerces2 also provides a complete implementation
of the Document Object Model Level 3 Core and Load/Save W3C Recommendations and provides a complete
implementation of the XML Inclusions (XInclude) W3C Recommendation. It also provides support for OASIS XML
Catalogs v1.1. Xerces2 is able to parse documents written according to the XML 1.1 Recommendation, except that
it does not yet provide an option to enable normalization checking as described in section 2.13 of this
specification. It also handles namespaces according to the XML Namespaces 1.1 Recommendation, and will correctly
serialize XML 1.1 documents if the DOM level 3 load/save APIs are in use.
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.xerces.impl.xs;
import java.lang.reflect.Array;
import java.util.AbstractList;
import java.util.Iterator;
import java.util.ListIterator;
import java.util.NoSuchElementException;
import java.util.Vector;
import org.apache.xerces.impl.Constants;
import org.apache.xerces.impl.xs.util.StringListImpl;
import org.apache.xerces.impl.xs.util.XSNamedMap4Types;
import org.apache.xerces.impl.xs.util.XSNamedMapImpl;
import org.apache.xerces.impl.xs.util.XSObjectListImpl;
import org.apache.xerces.util.SymbolHash;
import org.apache.xerces.util.XMLSymbols;
import org.apache.xerces.xs.StringList;
import org.apache.xerces.xs.XSAttributeDeclaration;
import org.apache.xerces.xs.XSAttributeGroupDefinition;
import org.apache.xerces.xs.XSConstants;
import org.apache.xerces.xs.XSElementDeclaration;
import org.apache.xerces.xs.XSIDCDefinition;
import org.apache.xerces.xs.XSModel;
import org.apache.xerces.xs.XSModelGroupDefinition;
import org.apache.xerces.xs.XSNamedMap;
import org.apache.xerces.xs.XSNamespaceItem;
import org.apache.xerces.xs.XSNamespaceItemList;
import org.apache.xerces.xs.XSNotationDeclaration;
import org.apache.xerces.xs.XSObject;
import org.apache.xerces.xs.XSObjectList;
import org.apache.xerces.xs.XSTypeDefinition;
/**
* Implements XSModel: a read-only interface that represents an XML Schema,
* which could be components from different namespaces.
*
* @xerces.internal
*
* @author Sandy Gao, IBM
*
* @version $Id: XSModelImpl.java 1024038 2010-10-18 22:06:35Z sandygao $
*/
public final class XSModelImpl extends AbstractList implements XSModel, XSNamespaceItemList {
// the max index / the max value of XSObject type
private static final short MAX_COMP_IDX = XSTypeDefinition.SIMPLE_TYPE;
private static final boolean[] GLOBAL_COMP = {false, // null
true, // attribute
true, // element
true, // type
false, // attribute use
true, // attribute group
true, // group
false, // model group
false, // particle
false, // wildcard
true, // idc
true, // notation
false, // annotation
false, // facet
false, // multi value facet
true, // complex type
true // simple type
};
// number of grammars/namespaces stored here
private final int fGrammarCount;
// all target namespaces
private final String[] fNamespaces;
// all schema grammar objects (for each namespace)
private final SchemaGrammar[] fGrammarList;
// a map from namespace to schema grammar
private final SymbolHash fGrammarMap;
// a map from element declaration to its substitution group
private final SymbolHash fSubGroupMap;
// store a certain kind of components from all namespaces
private final XSNamedMap[] fGlobalComponents;
// store a certain kind of components from one namespace
private final XSNamedMap[][] fNSComponents;
// a string list of all the target namespaces.
private final StringList fNamespacesList;
// store all annotations
private XSObjectList fAnnotations = null;
// whether there is any IDC in this XSModel
private final boolean fHasIDC;
/**
* Construct an XSModelImpl, by storing some grammars and grammars imported
* by them to this object.
*
* @param grammars the array of schema grammars
*/
public XSModelImpl(SchemaGrammar[] grammars) {
this(grammars, Constants.SCHEMA_VERSION_1_0);
}
public XSModelImpl(SchemaGrammar[] grammars, short s4sVersion) {
// copy namespaces/grammars from the array to our arrays
int len = grammars.length;
final int initialSize = Math.max(len+1, 5);
String[] namespaces = new String[initialSize];
SchemaGrammar[] grammarList = new SchemaGrammar[initialSize];
boolean hasS4S = false;
for (int i = 0; i < len; i++) {
final SchemaGrammar sg = grammars[i];
final String tns = sg.getTargetNamespace();
namespaces[i] = tns;
grammarList[i] = sg;
if (tns == SchemaSymbols.URI_SCHEMAFORSCHEMA) {
hasS4S = true;
}
}
// If a schema for the schema namespace isn't included, include it here.
if (!hasS4S) {
namespaces[len] = SchemaSymbols.URI_SCHEMAFORSCHEMA;
grammarList[len++] = SchemaGrammar.getS4SGrammar(s4sVersion);
}
SchemaGrammar sg1, sg2;
Vector gs;
int i, j, k;
// and recursively get all imported grammars, add them to our arrays
for (i = 0; i < len; i++) {
// get the grammar
sg1 = grammarList[i];
gs = sg1.getImportedGrammars();
// for each imported grammar
for (j = gs == null ? -1 : gs.size() - 1; j >= 0; j--) {
sg2 = (SchemaGrammar)gs.elementAt(j);
// check whether this grammar is already in the list
for (k = 0; k < len; k++) {
if (sg2 == grammarList[k]) {
break;
}
}
// if it's not, add it to the list
if (k == len) {
// ensure the capacity of the arrays
if (len == grammarList.length) {
String[] newSA = new String[len*2];
System.arraycopy(namespaces, 0, newSA, 0, len);
namespaces = newSA;
SchemaGrammar[] newGA = new SchemaGrammar[len*2];
System.arraycopy(grammarList, 0, newGA, 0, len);
grammarList = newGA;
}
namespaces[len] = sg2.getTargetNamespace();
grammarList[len] = sg2;
len++;
}
}
}
fNamespaces = namespaces;
fGrammarList = grammarList;
boolean hasIDC = false;
// establish the mapping from namespace to grammars
fGrammarMap = new SymbolHash(len*2);
for (i = 0; i < len; i++) {
fGrammarMap.put(null2EmptyString(fNamespaces[i]), fGrammarList[i]);
// update the idc field
if (fGrammarList[i].hasIDConstraints()) {
hasIDC = true;
}
}
fHasIDC = hasIDC;
fGrammarCount = len;
fGlobalComponents = new XSNamedMap[MAX_COMP_IDX+1];
fNSComponents = new XSNamedMap[len][MAX_COMP_IDX+1];
fNamespacesList = new StringListImpl(fNamespaces, fGrammarCount);
// build substitution groups
fSubGroupMap = buildSubGroups();
}
private SymbolHash buildSubGroups_Org() {
SubstitutionGroupHandler sgHandler = new SubstitutionGroupHandler(null);
for (int i = 0 ; i < fGrammarCount; i++) {
sgHandler.addSubstitutionGroup(fGrammarList[i].getSubstitutionGroups());
}
final XSNamedMap elements = getComponents(XSConstants.ELEMENT_DECLARATION);
final int len = elements.getLength();
final SymbolHash subGroupMap = new SymbolHash(len*2);
XSElementDecl head;
XSElementDeclaration[] subGroup;
for (int i = 0; i < len; i++) {
head = (XSElementDecl)elements.item(i);
subGroup = sgHandler.getSubstitutionGroup(head);
subGroupMap.put(head, subGroup.length > 0 ?
new XSObjectListImpl(subGroup, subGroup.length) : XSObjectListImpl.EMPTY_LIST);
}
return subGroupMap;
}
private SymbolHash buildSubGroups() {
SubstitutionGroupHandler sgHandler = new SubstitutionGroupHandler(null);
for (int i = 0 ; i < fGrammarCount; i++) {
sgHandler.addSubstitutionGroup(fGrammarList[i].getSubstitutionGroups());
}
final XSObjectListImpl elements = getGlobalElements();
final int len = elements.getLength();
final SymbolHash subGroupMap = new SymbolHash(len*2);
XSElementDecl head;
XSElementDeclaration[] subGroup;
for (int i = 0; i < len; i++) {
head = (XSElementDecl)elements.item(i);
subGroup = sgHandler.getSubstitutionGroup(head);
subGroupMap.put(head, subGroup.length > 0 ?
new XSObjectListImpl(subGroup, subGroup.length) : XSObjectListImpl.EMPTY_LIST);
}
return subGroupMap;
}
private XSObjectListImpl getGlobalElements() {
final SymbolHash[] tables = new SymbolHash[fGrammarCount];
int length = 0;
for (int i = 0; i < fGrammarCount; i++) {
tables[i] = fGrammarList[i].fAllGlobalElemDecls;
length += tables[i].getLength();
}
if (length == 0) {
return XSObjectListImpl.EMPTY_LIST;
}
final XSObject[] components = new XSObject[length];
int start = 0;
for (int i = 0; i < fGrammarCount; i++) {
tables[i].getValues(components, start);
start += tables[i].getLength();
}
return new XSObjectListImpl(components, length);
}
/**
* Convenience method. Returns a list of all namespaces that belong to
* this schema.
* @return A list of all namespaces that belong to this schema or
* null if all components don't have a targetNamespace.
*/
public StringList getNamespaces() {
return fNamespacesList;
}
/**
* A set of namespace schema information information items (of type
* XSNamespaceItem), one for each namespace name which
* appears as the target namespace of any schema component in the schema
* used for that assessment, and one for absent if any schema component
* in the schema had no target namespace. For more information see
* schema information.
*/
public XSNamespaceItemList getNamespaceItems() {
return this;
}
/**
* Returns a list of top-level components, i.e. element declarations,
* attribute declarations, etc.
* @param objectType The type of the declaration, i.e.
* ELEMENT_DECLARATION. Note that
* XSTypeDefinition.SIMPLE_TYPE and
* XSTypeDefinition.COMPLEX_TYPE can also be used as the
* objectType to retrieve only complex types or simple
* types, instead of all types.
* @return A list of top-level definitions of the specified type in
* objectType or an empty XSNamedMap if no
* such definitions exist.
*/
public synchronized XSNamedMap getComponents(short objectType) {
if (objectType <= 0 || objectType > MAX_COMP_IDX ||
!GLOBAL_COMP[objectType]) {
return XSNamedMapImpl.EMPTY_MAP;
}
SymbolHash[] tables = new SymbolHash[fGrammarCount];
// get all hashtables from all namespaces for this type of components
if (fGlobalComponents[objectType] == null) {
for (int i = 0; i < fGrammarCount; i++) {
switch (objectType) {
case XSConstants.TYPE_DEFINITION:
case XSTypeDefinition.COMPLEX_TYPE:
case XSTypeDefinition.SIMPLE_TYPE:
tables[i] = fGrammarList[i].fGlobalTypeDecls;
break;
case XSConstants.ATTRIBUTE_DECLARATION:
tables[i] = fGrammarList[i].fGlobalAttrDecls;
break;
case XSConstants.ELEMENT_DECLARATION:
tables[i] = fGrammarList[i].fGlobalElemDecls;
break;
case XSConstants.ATTRIBUTE_GROUP:
tables[i] = fGrammarList[i].fGlobalAttrGrpDecls;
break;
case XSConstants.MODEL_GROUP_DEFINITION:
tables[i] = fGrammarList[i].fGlobalGroupDecls;
break;
case XSConstants.NOTATION_DECLARATION:
tables[i] = fGrammarList[i].fGlobalNotationDecls;
break;
case XSConstants.IDENTITY_CONSTRAINT:
tables[i] = fGrammarList[i].fGlobalIDConstraintDecls;
break;
}
}
// for complex/simple types, create a special implementation,
// which take specific types out of the hash table
if (objectType == XSTypeDefinition.COMPLEX_TYPE ||
objectType == XSTypeDefinition.SIMPLE_TYPE) {
fGlobalComponents[objectType] = new XSNamedMap4Types(fNamespaces, tables, fGrammarCount, objectType);
}
else {
fGlobalComponents[objectType] = new XSNamedMapImpl(fNamespaces, tables, fGrammarCount);
}
}
return fGlobalComponents[objectType];
}
/**
* Convenience method. Returns a list of top-level component declarations
* that are defined within the specified namespace, i.e. element
* declarations, attribute declarations, etc.
* @param objectType The type of the declaration, i.e.
* ELEMENT_DECLARATION.
* @param namespace The namespace to which the declaration belongs or
* null (for components with no target namespace).
* @return A list of top-level definitions of the specified type in
* objectType and defined in the specified
* namespace or an empty XSNamedMap.
*/
public synchronized XSNamedMap getComponentsByNamespace(short objectType,
String namespace) {
if (objectType <= 0 || objectType > MAX_COMP_IDX ||
!GLOBAL_COMP[objectType]) {
return XSNamedMapImpl.EMPTY_MAP;
}
// try to find the grammar
int i = 0;
if (namespace != null) {
for (; i < fGrammarCount; ++i) {
if (namespace.equals(fNamespaces[i])) {
break;
}
}
}
else {
for (; i < fGrammarCount; ++i) {
if (fNamespaces[i] == null) {
break;
}
}
}
if (i == fGrammarCount) {
return XSNamedMapImpl.EMPTY_MAP;
}
// get the hashtable for this type of components
if (fNSComponents[i][objectType] == null) {
SymbolHash table = null;
switch (objectType) {
case XSConstants.TYPE_DEFINITION:
case XSTypeDefinition.COMPLEX_TYPE:
case XSTypeDefinition.SIMPLE_TYPE:
table = fGrammarList[i].fGlobalTypeDecls;
break;
case XSConstants.ATTRIBUTE_DECLARATION:
table = fGrammarList[i].fGlobalAttrDecls;
break;
case XSConstants.ELEMENT_DECLARATION:
table = fGrammarList[i].fGlobalElemDecls;
break;
case XSConstants.ATTRIBUTE_GROUP:
table = fGrammarList[i].fGlobalAttrGrpDecls;
break;
case XSConstants.MODEL_GROUP_DEFINITION:
table = fGrammarList[i].fGlobalGroupDecls;
break;
case XSConstants.NOTATION_DECLARATION:
table = fGrammarList[i].fGlobalNotationDecls;
break;
case XSConstants.IDENTITY_CONSTRAINT:
table = fGrammarList[i].fGlobalIDConstraintDecls;
break;
}
// for complex/simple types, create a special implementation,
// which take specific types out of the hash table
if (objectType == XSTypeDefinition.COMPLEX_TYPE ||
objectType == XSTypeDefinition.SIMPLE_TYPE) {
fNSComponents[i][objectType] = new XSNamedMap4Types(namespace, table, objectType);
}
else {
fNSComponents[i][objectType] = new XSNamedMapImpl(namespace, table);
}
}
return fNSComponents[i][objectType];
}
/**
* Convenience method. Returns a top-level simple or complex type
* definition.
* @param name The name of the definition.
* @param namespace The namespace of the definition, otherwise null.
* @return An XSTypeDefinition or null if such definition
* does not exist.
*/
public XSTypeDefinition getTypeDefinition(String name,
String namespace) {
SchemaGrammar sg = (SchemaGrammar)fGrammarMap.get(null2EmptyString(namespace));
if (sg == null) {
return null;
}
return (XSTypeDefinition)sg.fGlobalTypeDecls.get(name);
}
/**
* Convenience method. Returns a top-level simple or complex type
* definition.
* @param name The name of the definition.
* @param namespace The namespace of the definition, otherwise null.
* @param loc The schema location where the component was defined
* @return An XSTypeDefinition or null if such definition
* does not exist.
*/
public XSTypeDefinition getTypeDefinition(String name,
String namespace,
String loc) {
SchemaGrammar sg = (SchemaGrammar)fGrammarMap.get(null2EmptyString(namespace));
if (sg == null) {
return null;
}
return sg.getGlobalTypeDecl(name, loc);
}
/**
* Convenience method. Returns a top-level attribute declaration.
* @param name The name of the declaration.
* @param namespace The namespace of the definition, otherwise null.
* @return A top-level attribute declaration or null if such declaration
* does not exist.
*/
public XSAttributeDeclaration getAttributeDeclaration(String name,
String namespace) {
SchemaGrammar sg = (SchemaGrammar)fGrammarMap.get(null2EmptyString(namespace));
if (sg == null) {
return null;
}
return (XSAttributeDeclaration)sg.fGlobalAttrDecls.get(name);
}
/**
* Convenience method. Returns a top-level attribute declaration.
* @param name The name of the declaration.
* @param namespace The namespace of the definition, otherwise null.
* @param loc The schema location where the component was defined
* @return A top-level attribute declaration or null if such declaration
* does not exist.
*/
public XSAttributeDeclaration getAttributeDeclaration(String name,
String namespace,
String loc) {
SchemaGrammar sg = (SchemaGrammar)fGrammarMap.get(null2EmptyString(namespace));
if (sg == null) {
return null;
}
return sg.getGlobalAttributeDecl(name, loc);
}
/**
* Convenience method. Returns a top-level element declaration.
* @param name The name of the declaration.
* @param namespace The namespace of the definition, otherwise null.
* @return A top-level element declaration or null if such declaration
* does not exist.
*/
public XSElementDeclaration getElementDeclaration(String name,
String namespace) {
SchemaGrammar sg = (SchemaGrammar)fGrammarMap.get(null2EmptyString(namespace));
if (sg == null) {
return null;
}
return (XSElementDeclaration)sg.fGlobalElemDecls.get(name);
}
/**
* Convenience method. Returns a top-level element declaration.
* @param name The name of the declaration.
* @param namespace The namespace of the definition, otherwise null.
* @param loc The schema location where the component was defined
* @return A top-level element declaration or null if such declaration
* does not exist.
*/
public XSElementDeclaration getElementDeclaration(String name,
String namespace,
String loc) {
SchemaGrammar sg = (SchemaGrammar)fGrammarMap.get(null2EmptyString(namespace));
if (sg == null) {
return null;
}
return sg.getGlobalElementDecl(name, loc);
}
/**
* Convenience method. Returns a top-level attribute group definition.
* @param name The name of the definition.
* @param namespace The namespace of the definition, otherwise null.
* @return A top-level attribute group definition or null if such
* definition does not exist.
*/
public XSAttributeGroupDefinition getAttributeGroup(String name,
String namespace) {
SchemaGrammar sg = (SchemaGrammar)fGrammarMap.get(null2EmptyString(namespace));
if (sg == null) {
return null;
}
return (XSAttributeGroupDefinition)sg.fGlobalAttrGrpDecls.get(name);
}
/**
* Convenience method. Returns a top-level attribute group definition.
* @param name The name of the definition.
* @param namespace The namespace of the definition, otherwise null.
* @param loc The schema location where the component was defined
* @return A top-level attribute group definition or null if such
* definition does not exist.
*/
public XSAttributeGroupDefinition getAttributeGroup(String name,
String namespace,
String loc) {
SchemaGrammar sg = (SchemaGrammar)fGrammarMap.get(null2EmptyString(namespace));
if (sg == null) {
return null;
}
return sg.getGlobalAttributeGroupDecl(name, loc);
}
/**
* Convenience method. Returns a top-level model group definition.
*
* @param name The name of the definition.
* @param namespace The namespace of the definition, otherwise null.
* @return A top-level model group definition definition or null if such
* definition does not exist.
*/
public XSModelGroupDefinition getModelGroupDefinition(String name,
String namespace) {
SchemaGrammar sg = (SchemaGrammar)fGrammarMap.get(null2EmptyString(namespace));
if (sg == null) {
return null;
}
return (XSModelGroupDefinition)sg.fGlobalGroupDecls.get(name);
}
/**
* Convenience method. Returns a top-level model group definition.
*
* @param name The name of the definition.
* @param namespace The namespace of the definition, otherwise null.
* @param loc The schema location where the component was defined
* @return A top-level model group definition definition or null if such
* definition does not exist.
*/
public XSModelGroupDefinition getModelGroupDefinition(String name,
String namespace,
String loc) {
SchemaGrammar sg = (SchemaGrammar)fGrammarMap.get(null2EmptyString(namespace));
if (sg == null) {
return null;
}
return sg.getGlobalGroupDecl(name, loc);
}
/**
* Convenience method. Returns a top-level model group definition.
*
* @param name The name of the definition.
* @param namespace The namespace of the definition, otherwise null.
* @return A top-level model group definition definition or null if such
* definition does not exist.
*/
public XSIDCDefinition getIDCDefinition(String name, String namespace) {
SchemaGrammar sg = (SchemaGrammar)fGrammarMap.get(null2EmptyString(namespace));
if (sg == null) {
return null;
}
return (XSIDCDefinition)sg.fGlobalIDConstraintDecls.get(name);
}
/**
* Convenience method. Returns a top-level model group definition.
*
* @param name The name of the definition.
* @param namespace The namespace of the definition, otherwise null.
* @param loc The schema location where the component was defined
* @return A top-level model group definition definition or null if such
* definition does not exist.
*/
public XSIDCDefinition getIDCDefinition(String name, String namespace,
String loc) {
SchemaGrammar sg = (SchemaGrammar)fGrammarMap.get(null2EmptyString(namespace));
if (sg == null) {
return null;
}
return sg.getIDConstraintDecl(name, loc);
}
/**
* @see org.apache.xerces.xs.XSModel#getNotationDeclaration(String, String)
*/
public XSNotationDeclaration getNotationDeclaration(String name,
String namespace) {
SchemaGrammar sg = (SchemaGrammar)fGrammarMap.get(null2EmptyString(namespace));
if (sg == null) {
return null;
}
return (XSNotationDeclaration)sg.fGlobalNotationDecls.get(name);
}
public XSNotationDeclaration getNotationDeclaration(String name,
String namespace,
String loc) {
SchemaGrammar sg = (SchemaGrammar)fGrammarMap.get(null2EmptyString(namespace));
if (sg == null) {
return null;
}
return sg.getGlobalNotationDecl(name, loc);
}
/**
* [annotations]: a set of annotations if it exists, otherwise an empty
* XSObjectList.
*/
public synchronized XSObjectList getAnnotations() {
if (fAnnotations != null) {
return fAnnotations;
}
// do this in two passes to avoid inaccurate array size
int totalAnnotations = 0;
for (int i = 0; i < fGrammarCount; i++) {
totalAnnotations += fGrammarList[i].fNumAnnotations;
}
if (totalAnnotations == 0) {
fAnnotations = XSObjectListImpl.EMPTY_LIST;
return fAnnotations;
}
XSAnnotationImpl [] annotations = new XSAnnotationImpl [totalAnnotations];
int currPos = 0;
for (int i = 0; i < fGrammarCount; i++) {
SchemaGrammar currGrammar = fGrammarList[i];
if (currGrammar.fNumAnnotations > 0) {
System.arraycopy(currGrammar.fAnnotations, 0, annotations, currPos, currGrammar.fNumAnnotations);
currPos += currGrammar.fNumAnnotations;
}
}
fAnnotations = new XSObjectListImpl(annotations, annotations.length);
return fAnnotations;
}
private static final String null2EmptyString(String str) {
return str == null ? XMLSymbols.EMPTY_STRING : str;
}
/**
* REVISIT: to expose identity constraints from XSModel.
* For now, we only expose whether there are any IDCs.
* We also need to add these methods to the public
* XSModel interface.
*/
public boolean hasIDConstraints() {
return fHasIDC;
}
/**
* Convenience method. Returns a list containing the members of the
* substitution group for the given XSElementDeclaration
* or an empty XSObjectList if the substitution group
* contains no members.
* @param head The substitution group head.
* @return A list containing the members of the substitution group
* for the given XSElementDeclaration or an empty
* XSObjectList if the substitution group contains
* no members.
*/
public XSObjectList getSubstitutionGroup(XSElementDeclaration head) {
return (XSObjectList)fSubGroupMap.get(head);
}
//
// XSNamespaceItemList methods
//
/**
* The number of XSNamespaceItems in the list. The range of
* valid child object indices is 0 to length-1 inclusive.
*/
public int getLength() {
return fGrammarCount;
}
/**
* Returns the indexth item in the collection or
* null if index is greater than or equal to
* the number of objects in the list. The index starts at 0.
* @param index index into the collection.
* @return The XSNamespaceItem at the indexth
* position in the XSNamespaceItemList, or
* null if the index specified is not valid.
*/
public XSNamespaceItem item(int index) {
if (index < 0 || index >= fGrammarCount) {
return null;
}
return fGrammarList[index];
}
//
// java.util.List methods
//
public Object get(int index) {
if (index >= 0 && index < fGrammarCount) {
return fGrammarList[index];
}
throw new IndexOutOfBoundsException("Index: " + index);
}
public int size() {
return getLength();
}
public Iterator iterator() {
return listIterator0(0);
}
public ListIterator listIterator() {
return listIterator0(0);
}
public ListIterator listIterator(int index) {
if (index >= 0 && index < fGrammarCount) {
return listIterator0(index);
}
throw new IndexOutOfBoundsException("Index: " + index);
}
private ListIterator listIterator0(int index) {
return new XSNamespaceItemListIterator(index);
}
public Object[] toArray() {
Object[] a = new Object[fGrammarCount];
toArray0(a);
return a;
}
public Object[] toArray(Object[] a) {
if (a.length < fGrammarCount) {
Class arrayClass = a.getClass();
Class componentType = arrayClass.getComponentType();
a = (Object[]) Array.newInstance(componentType, fGrammarCount);
}
toArray0(a);
if (a.length > fGrammarCount) {
a[fGrammarCount] = null;
}
return a;
}
private void toArray0(Object[] a) {
if (fGrammarCount > 0) {
System.arraycopy(fGrammarList, 0, a, 0, fGrammarCount);
}
}
private final class XSNamespaceItemListIterator implements ListIterator {
private int index;
public XSNamespaceItemListIterator(int index) {
this.index = index;
}
public boolean hasNext() {
return (index < fGrammarCount);
}
public Object next() {
if (index < fGrammarCount) {
return fGrammarList[index++];
}
throw new NoSuchElementException();
}
public boolean hasPrevious() {
return (index > 0);
}
public Object previous() {
if (index > 0) {
return fGrammarList[--index];
}
throw new NoSuchElementException();
}
public int nextIndex() {
return index;
}
public int previousIndex() {
return index - 1;
}
public void remove() {
throw new UnsupportedOperationException();
}
public void set(Object o) {
throw new UnsupportedOperationException();
}
public void add(Object o) {
throw new UnsupportedOperationException();
}
}
} // class XSModelImpl