protected final Map<String, CachedValue<XmlNSDescriptor>> initNSDescriptorsMap() {
Map<String, CachedValue<XmlNSDescriptor>> map = myNSDescriptorsMap;
if (map == null) {
RecursionGuard.StackStamp stamp = ourGuard.markStack();
map = computeNsDescriptorMap();
if (stamp.mayCacheNow()) {
myNSDescriptorsMap = map;
}
}
return map;
}
@Nullable
private BidirectionalMap<String, String> initNamespaceMaps(PsiElement parent) {
BidirectionalMap<String, String> map = myNamespaceMap;
if (map == null) {
RecursionGuard.StackStamp stamp = ourGuard.markStack();
map = computeNamespaceMap(parent);
if (stamp.mayCacheNow()) {
myNamespaceMap = map;
}
}
return map;
}
@NotNull
public String getNamespaceByPrefix(String prefix) {
final PsiElement parent = getParent();
LOG.assertTrue(parent.isValid());
BidirectionalMap<String, String> map = initNamespaceMaps(parent);
if (map != null) {
final String ns = map.get(prefix);
if (ns != null) return ns;
}
if (parent instanceof XmlTag) return ((XmlTag) parent).getNamespaceByPrefix(prefix);
// The prefix 'xml' is by definition bound to the namespace name
// http://www.w3.org/XML/1998/namespace. It MAY, but need not, be declared
if (XML_NS_PREFIX.equals(prefix)) return XmlUtil.XML_NAMESPACE_URI;
if (prefix.length() > 0 && !hasNamespaceDeclarations() && getNamespacePrefix().equals(prefix)) {
// When there is no namespace declarations then qualified names should be just used in dtds
// this implies that we may have "" namespace prefix ! (see last paragraph in Namespaces in
// Xml, Section 5)
String result =
ourGuard.doPreventingRecursion(
"getNsByPrefix",
true,
new Computable<String>() {
@Override
public String compute() {
final String nsFromEmptyPrefix = getNamespaceByPrefix("");
final XmlNSDescriptor nsDescriptor = getNSDescriptor(nsFromEmptyPrefix, false);
final XmlElementDescriptor descriptor =
nsDescriptor != null
? nsDescriptor.getElementDescriptor(XmlTagImpl.this)
: null;
final String nameFromRealDescriptor =
descriptor != null
&& descriptor.getDeclaration() != null
&& descriptor.getDeclaration().isPhysical()
? descriptor.getName()
: "";
if (nameFromRealDescriptor.equals(getName())) return nsFromEmptyPrefix;
return XmlUtil.EMPTY_URI;
}
});
if (result != null) {
return result;
}
}
return XmlUtil.EMPTY_URI;
}
@NotNull
public String getNamespace() {
String cachedNamespace = myCachedNamespace;
final long curModCount = getManager().getModificationTracker().getModificationCount();
if (cachedNamespace != null && myModCount == curModCount) {
return cachedNamespace;
}
RecursionGuard.StackStamp stamp = ourGuard.markStack();
cachedNamespace = getNamespaceByPrefix(getNamespacePrefix());
if (!stamp.mayCacheNow()) {
return cachedNamespace;
}
myCachedNamespace = cachedNamespace;
myModCount = curModCount;
return cachedNamespace;
}
public XmlElementDescriptor getDescriptor() {
final long curModCount = getManager().getModificationTracker().getModificationCount();
long curExtResourcesModCount =
ExternalResourceManagerEx.getInstanceEx().getModificationCount(getProject());
if (myDescriptorModCount != curModCount || myExtResourcesModCount != curExtResourcesModCount) {
if (myExtResourcesModCount != curExtResourcesModCount) {
myNSDescriptorsMap = null;
}
RecursionGuard.StackStamp stamp = ourGuard.markStack();
XmlElementDescriptor descriptor = computeElementDescriptor();
if (!stamp.mayCacheNow()) {
return descriptor;
}
myCachedDescriptor = descriptor;
myDescriptorModCount = curModCount;
myExtResourcesModCount = curExtResourcesModCount;
}
return myCachedDescriptor;
}