/**
* Adds given attribute into this container. Checks duplicities in attribute's names.
*
* @param attribute given attribute
* @throws QtiAttributeException if container already contains attribute with same name
*/
public void add(final Attribute<?> attribute) {
for (final Attribute<?> child : attributes) {
if (child.getLocalName().equals(attribute.getLocalName())
&& child.getNamespaceUri().equals(attribute.getNamespaceUri())) {
throw new QtiAttributeException("Duplicate attribute name: " + attribute.computeXPath());
}
}
attributes.add(attribute);
}
/**
* Gets attribute with given local name and namespace URI or null (if attribute is not found).
* Silent parameter is useful for support of unknown attributes.
*
* @param localName name of requested attribute
* @param silent if exception should be thrown in case attribute is not found
* @return attribute with given name
* @throws QtiAttributeException if silent is false and if attribute is not found
*/
private Attribute<?> get(
final String localName, final String namespaceUri, final boolean silent) {
Assert.notNull(localName, "localName");
Assert.notNull(namespaceUri, "namespaceUri");
for (final Attribute<?> attribute : attributes) {
if (attribute.getLocalName().equals(localName)
&& attribute.getNamespaceUri().equals(namespaceUri)) {
return attribute;
}
}
if (silent) {
return null;
}
throw new QtiAttributeException(
"Cannot find attribute with namespace '"
+ namespaceUri
+ "' and local name '"
+ localName
+ "' in Node with XPath "
+ owner.computeXPath());
}
