Shorthand for filterChildElems(p)
.
Shorthand for attributeOption(expandedName)
.
Shorthand for attributeOption(expandedName)
.
Shorthand for filterElemsOrSelf(p)
.
Shorthand for findTopmostElemsOrSelf(p)
.
Returns the ENames of the ancestry, starting with the root element and ending with the parent of this element, if any.
Returns the ENames of the ancestry, starting with the root element and ending with the parent of this element, if any.
That is, returns:
ancestryOrSelfENames.dropRight(1)
Returns the ENames of the ancestry-or-self, starting with the root element and ending with this element.
Returns the ENames of the ancestry-or-self, starting with the root element and ending with this element.
That is, returns:
rootElem.resolvedName +: path.entries.map(_.elementName)
Returns the value of the attribute with the given expanded name, and throws an exception otherwise.
Returns the value of the attribute with the given expanded name, and throws an exception otherwise.
Returns the QName value of the attribute with the given expanded name, and throws an exception otherwise
Returns the QName value of the attribute with the given expanded name, and throws an exception otherwise
Returns the QName value of the attribute with the given expanded name, if any, wrapped in an Option
.
Returns the QName value of the attribute with the given expanded name, if any, wrapped in an Option
.
If the attribute exists, but its value is not a QName, an exception is thrown.
Returns the resolved QName value (as EName) of the attribute with the given expanded name, and throws an exception otherwise
Returns the resolved QName value (as EName) of the attribute with the given expanded name, and throws an exception otherwise
Returns the resolved QName value (as EName) of the attribute with the given expanded name, if any, wrapped in an Option
.
Returns the resolved QName value (as EName) of the attribute with the given expanded name, if any, wrapped in an Option
.
None is returned if the attribute does not exist. If the QName value cannot be resolved given the scope of the element,
an exception is thrown.
Returns the value of the attribute with the given expanded name, if any, wrapped in an Option
.
Returns the value of the attribute with the given expanded name, if any, wrapped in an Option
.
The attributes of the element as mapping from QNames to values
The attributes of the element as mapping from QNames to values
Returns the child elements obeying the given predicate.
Returns the descendant elements obeying the given predicate.
Returns the descendant-or-self elements obeying the given predicate.
Returns the descendant-or-self elements obeying the given predicate. This method could be defined as:
def filterElemsOrSelf(p: E => Boolean): immutable.IndexedSeq[E] = Vector(this).filter(p) ++ (this.findAllChildElems flatMap (_.filterElemsOrSelf(p)))
It can be proven that the result is equivalent to findAllElemsOrSelf filter p
.
Returns all child elements, in the correct order.
Returns all descendant elements (not including this element).
Returns this element followed by all descendant elements (that is, the descendant-or-self elements).
Returns the first found attribute value of an attribute with the given local name, if any, wrapped in an Option
.
Returns the first found attribute value of an attribute with the given local name, if any, wrapped in an Option
.
Because of differing namespaces, it is possible that more than one such attribute exists, although this is not often the case.
Returns the first found child element obeying the given predicate, if any, wrapped in an Option
.
Finds the child element with the given Path.Entry
(where this element is the root), if any, wrapped in an Option
.
Finds the child element with the given Path.Entry
(where this element is the root), if any, wrapped in an Option
.
Returns the first found (topmost) descendant element obeying the given predicate, if any, wrapped in an Option
.
Returns the first found (topmost) descendant-or-self element obeying the given predicate, if any, wrapped in an Option
.
Finds the element with the given Path
(where this element is the root), if any, wrapped in an Option
.
Finds the element with the given Path
(where this element is the root), if any, wrapped in an Option
.
This method must be very efficient, which depends on the efficiency of method findChildElemByPathEntry
.
Returns the descendant elements obeying the given predicate that have no ancestor obeying the predicate.
Returns the descendant-or-self elements obeying the given predicate, such that no ancestor obeys the predicate.
Returns the descendant-or-self elements obeying the given predicate, such that no ancestor obeys the predicate. This method could be defined as:
def findTopmostElemsOrSelf(p: E => Boolean): immutable.IndexedSeq[E] = if (p(this)) Vector(this) else (this.findAllChildElems flatMap (_.findTopmostElemsOrSelf(p)))
Returns the single child element obeying the given predicate, and throws an exception otherwise.
Returns (the equivalent of) findChildElemByPathEntry(entry).get
Returns (the equivalent of) findChildElemByPathEntry(entry).get
Returns (the equivalent of) findElemOrSelfByPath(path).get
Returns (the equivalent of) findElemOrSelfByPath(path).get
The local name, that is, the local part of the EName
The local name, that is, the local part of the EName
Returns the namespaces declared in this element.
Returns the namespaces declared in this element.
If the original parsed XML document contained duplicate namespace declarations (i.e. namespace declarations that are the same
as some namespace declarations in their context), these duplicate namespace declarations were lost during parsing of the
XML into an Elem
tree. They therefore do not occur in the namespace declarations returned by this method.
Returns XmlStringUtils.normalizeString(text)
.
Returns XmlStringUtils.normalizeString(text)
.
The QName of the element
The QName of the element
The resolved attributes of the element as mapping from ENames to values
The resolved attributes of the element as mapping from ENames to values
The EName of the element
The EName of the element
Returns this.elem.scope
Returns this.elem.scope
Returns the concatenation of the texts of text children, including whitespace.
Returns the concatenation of the texts of text children, including whitespace. Non-text children are ignored. If there are no text children, the empty string is returned.
Returns QName(text.trim)
Returns QName(text.trim)
Returns the equivalent of scope.resolveQNameOption(textAsQName).get
Returns the equivalent of scope.resolveQNameOption(textAsQName).get
Returns text.trim
.
Returns text.trim
.
An element within its context. In other words, an element as a pair containing the root element (as eu.cdevreeze.yaidom.simple.Elem) and a path (from that root element) to this element.
See the documentation of the mixed-in query API trait(s) for more details on the uniform query API offered by this class.
An
indexed.Elem(rootElem)
can be seen as one immutable snapshot of an XML tree. All queries (using theElemApi
uniform query API) on that snapshot return results within the same snapshot. Take care not to mix up query results from different snapshots. (This could have been modeled in an alternative design of the class, using a member type, but such a design has not been chosen.)Example
Below follows an example. This example queries for all book elements having at least Jeffrey Ullman as author. It can be written as follows, assuming a book store
Document
with the appropriate structure:Note how we found an ancestor (Book) element of an Author element by first finding the appropriate ancestor path, and then querying the bookstore element for the element at that path. So we remembered the document element (as indexed element), and used that "snapshot" to navigate to elements at given ancestor paths of other elements. This is certainly more efficient than re-indexing (using an indexed element factory method).
Elem more formally
In order to get started using the class, this more formal section can safely be skipped. On the other hand, this section may provide a deeper understanding of the class.
Let
indexedRootElem
be a root element, soindexedRootElem.path == Path.Root
.Then, first of all, we have:
Given:
val elems = indexedRootElem.findAllElemsOrSelf
the following (rather obvious) properties hold for indexed elements:
The properties above hold for
findAllElemsOrSelf
, so they certainly hold for the other child/descendant/descendant-or-self element query methods.