Interface ElementTraversal
public interface ElementTraversal
The
ElementTraversal interface is a set of read-only attributes
which allow an author to easily navigate between elements in a document.
In conforming implementations of Element Traversal, all objects that
implement Element must also implement the ElementTraversal
interface. Four of the methods,
getFirstElementChild(), getLastElementChild(),
getPreviousElementSibling(), and getNextElementSibling(),
each provides a live reference to another element with the defined
relationship to the current element, if the related element exists. The
fifth method, getChildElementCount(), exposes the number of child
elements of an element, for preprocessing before navigation.
- Since:
- 9
- See Also:
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Method Summary
Modifier and TypeMethodDescriptionintReturns the current number of child nodes of the element which are of theElementtype.Returns a reference to the first child node of the element which is of theElementtype.Returns a reference to the last child node of the element which is of theElementtype.Returns a reference to the sibling node of the element which most immediately follows the element in document order, and which is of theElementtype.Returns a reference to the sibling node of the element which most immediately precedes the element in document order, and which is of theElementtype.
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Method Details
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getFirstElementChild
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getLastElementChild
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getPreviousElementSibling
Element getPreviousElementSibling()Returns a reference to the sibling node of the element which most immediately precedes the element in document order, and which is of theElementtype.- Returns:
- a reference to an element child,
nullif the element has no sibling node of theElementtype that comes before this one.
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getNextElementSibling
Element getNextElementSibling()Returns a reference to the sibling node of the element which most immediately follows the element in document order, and which is of theElementtype.- Returns:
- a reference to an element child,
nullif the element has no sibling node of theElementtype that comes after this one.
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getChildElementCount
int getChildElementCount()Returns the current number of child nodes of the element which are of theElementtype.- Returns:
- the number of element children, or
0if the element has no element children.
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