public XmlNSDescriptor getNSDescriptor(final String namespace, boolean strict) {
final XmlTag parentTag = getParentTag();
if (parentTag == null && namespace.equals(XmlUtil.XHTML_URI)) {
final XmlNSDescriptor descriptor = getDtdDescriptor(XmlUtil.getContainingFile(this));
if (descriptor != null) {
return descriptor;
}
}
Map<String, CachedValue<XmlNSDescriptor>> map = initNSDescriptorsMap();
final CachedValue<XmlNSDescriptor> descriptor = map.get(namespace);
if (descriptor != null) {
final XmlNSDescriptor value = descriptor.getValue();
if (value != null) {
return value;
}
}
if (parentTag == null) {
final XmlDocument parentOfType = PsiTreeUtil.getParentOfType(this, XmlDocument.class);
if (parentOfType == null) {
return null;
}
return parentOfType.getDefaultNSDescriptor(namespace, strict);
}
return parentTag.getNSDescriptor(namespace, strict);
}
@Override
@Nullable
public PsiModifierList getAnnotationList() {
if (myAnnotationList == null) {
myAnnotationList =
CachedValuesManager.getManager(myManager.getProject())
.createCachedValue(new PackageAnnotationValueProvider());
}
return myAnnotationList.getValue();
}
/**
* Returns the value for the given key only if it is not expired, or null if no value exists or is
* expired.
*
* <p>This method will return null if either there is no value associated with this key or if the
* associated value is expired.
*
* @param key the key to look up
*/
@NeededForTesting
public V get(K key) {
CachedValue<V> cachedValue = getCachedValue(key);
return cachedValue == null || cachedValue.isExpired() ? null : cachedValue.getValue();
}
/**
* Returns the value for the given key, or null if no value exists.
*
* <p>When using this method, it is not possible to determine whether the value is expired or not.
* Use {@link #getCachedValue(Object)} to achieve that instead. However, if using {@link
* #getCachedValue(Object)} to determine if an item is expired, one should use the item within the
* {@link CachedValue} and not call {@link #getPossiblyExpired(Object)} to get the value
* afterwards, since that is not guaranteed to return the same value or that the newly returned
* value is in the same state.
*
* @param key the key to look up
*/
public V getPossiblyExpired(K key) {
CachedValue<V> cachedValue = getCachedValue(key);
return cachedValue == null ? null : cachedValue.getValue();
}