public void startElement(String name, AttributeList atts)
throws org.xml.sax.SAXException
{
//-- strip namespace prefix
int idx = name.indexOf(':');
if (idx >= 0) {
name = name.substring(idx+1);
}
StateInfo sInfo = null;
boolean topLevel = false;
//-- if we are currently in another element
//-- definition...flag as complex content
if (!_siStack.isEmpty()) {
sInfo = (StateInfo)_siStack.peek();
sInfo.complex = true;
}
else {
topLevel = true;
}
//-- create current holder for stateInformation
sInfo = new StateInfo();
sInfo.topLevel = topLevel;
_siStack.push(sInfo);
//-- create element definition
sInfo.element = new ElementDecl(_schema, name);
//-- create attributes
for (int i = 0; i < atts.getLength(); i++) {
String attName = atts.getName(i);
//-- skip namespace declarations
if (attName.equals(XMLNS)) continue;
String prefix = "";
idx = attName.indexOf(':');
if (idx >= 0) {
prefix = attName.substring(0, idx);
attName = attName.substring(idx+1);
}
if (prefix.equals(XMLNS)) continue;
AttributeDecl attr = new AttributeDecl(_schema, attName);
//-- guess simple type
String typeName = _nsPrefix + ':' +
DatatypeHandler.guessType(atts.getValue(i));
attr.setSimpleTypeReference(typeName);
sInfo.attributes.addElement(attr);
}
} //-- startElement
/**
* Merges the two element declarations. The resulting
* merge is placed in ElementDecl e1.
*
* @param e1 the main ElementDecl
* @param e2 the secondary ElementDecl to merge with e1
**/
private void merge(ElementDecl e1, ElementDecl e2)
throws SchemaException
{
XMLType e1Type = e1.getType();
XMLType e2Type = e2.getType();
//-- Make sure types are not null and if so create them
if (e1Type == null) {
if (e2Type == null) return; //-- nothing to merge
else {
if (e2Type.isSimpleType()) {
e1.setType(e2Type);
}
else {
ComplexType cType = new ComplexType(_schema);
Group group = new Group();
group.setOrder(_defaultGroupOrder);
cType.addGroup(group);
e1.setType(cType);
e1Type = cType;
}
}
}
else if (e2Type == null) {
if (e1Type.isSimpleType()) {
e2.setType(e1Type);
}
else {
ComplexType cType = new ComplexType(_schema);
Group group = new Group();
group.setOrder(_defaultGroupOrder);
cType.addGroup(group);
e2.setType(cType);
e2Type = cType;
}
}
//-- both simple types
if (e1Type.isSimpleType() && e2Type.isSimpleType()) {
if (!e1Type.getName().equals(e2Type.getName())) {
String typeName = _nsPrefix + ':' +
DatatypeHandler.whichType(e1Type.getName(),
e2Type.getName());
e1.setType(null);
e1.setTypeReference(typeName);
}
return;
}
//-- e1 is simple, e2 is complex
else if (e1Type.isSimpleType()) {
ComplexType cType = new ComplexType(_schema);
e1.setType(cType);
Group group = new Group();
group.setOrder(_defaultGroupOrder);
cType.addGroup(group);
cType.setContentType(ContentType.mixed);
e1Type = cType;
//-- do not return here...we need to now treat as both
//-- were complex
}
//-- e2 is simple, e1 is complex
else if (e2Type.isSimpleType()) {
ComplexType cType = new ComplexType(_schema);
e2.setType(cType);
Group group = new Group();
group.setOrder(_defaultGroupOrder);
cType.addGroup(group);
cType.setContentType(ContentType.mixed);
e2Type = cType;
//-- do not return here...we need to now treat as both
//-- were complex
}
//-- both complex types
ComplexType cType1 = (ComplexType)e1Type;
ComplexType cType2 = (ComplexType)e2Type;
//-- loop through all element/attribute declarations
//-- of e2 and add them to e1 if they do not already exist
//-- and mark them as optional
Group e1Group = (Group) cType1.getParticle(0);
if (e1Group == null) {
e1Group = new Group();
e1Group.setOrder(_defaultGroupOrder);
cType1.addGroup(e1Group);
}
Group e2Group = (Group) cType2.getParticle(0);
if (e2Group == null) {
e2Group = new Group();
e2Group.setOrder(_defaultGroupOrder);
cType2.addGroup(e2Group);
}
Enumeration enum = e2Group.enumerate();
while (enum.hasMoreElements()) {
Particle particle = (Particle)enum.nextElement();
if (particle.getStructureType() == Structure.ELEMENT) {
ElementDecl element = (ElementDecl)particle;
ElementDecl main = e1Group.getElementDecl(element.getName());
if (main == null) {
e1Group.addElementDecl(element);
element.setMinOccurs(0);
}
else {
merge(main, element);
}
}
}
//-- add all attributes from type2
enum = cType2.getAttributeDecls();
while (enum.hasMoreElements()) {
//-- check for attribute with same name
AttributeDecl attNew = (AttributeDecl)enum.nextElement();
String attName = attNew.getName();
AttributeDecl attPrev = cType1.getAttributeDecl(attName);
if (attPrev == null) {
attNew.setUse(AttributeDecl.USE_OPTIONAL);
cType1.addAttributeDecl(attNew);
}
else {
String type1 = attPrev.getSimpleType().getName();
String type2 = attNew.getSimpleType().getName();
if (!type1.equals(type2)) {
String typeName = _nsPrefix + ':' +
DatatypeHandler.whichType(type1, type2);
attPrev.setSimpleTypeReference(typeName); }
}
}
//-- loop through all element/attribute declarations
//-- of e1 and if they do not exist in e2, simply
//-- mark them as optional
enum = e1Group.enumerate();
while (enum.hasMoreElements()) {
Particle particle = (Particle)enum.nextElement();
if (particle.getStructureType() == Structure.ELEMENT) {
ElementDecl element = (ElementDecl)particle;
if (e2Group.getElementDecl(element.getName()) == null) {
element.setMinOccurs(0);
}
}
}
} //-- merge