org.apache.tools.ant.taskdefs.optional.junit
Class DOMUtil
java.lang.Object
org.apache.tools.ant.taskdefs.optional.junit.DOMUtil
public final class DOMUtil
extends java.lang.Object
Some utilities that might be useful when manipulating DOM trees.
static Element | getChildByTagName(Node parent, String tagname) - Iterate over the children of a given node and return the first node
that has a specific name.
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static String | getNodeAttribute(Node node, String name) - return the attribute value of an element.
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static Node | importNode(Node parent, Node child) - Simple tree walker that will clone recursively a node.
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static NodeList | listChildNodes(Node parent, DOMUtil.NodeFilter filter, boolean recurse) - list a set of node that match a specific filter.
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getChildByTagName
public static Element getChildByTagName(Node parent,
String tagname)
Iterate over the children of a given node and return the first node
that has a specific name.
parent
- the node to search child from. Can be null.tagname
- the child name we are looking for. Cannot be null.
- the first child that matches the given name or null if
the parent is null or if a child does not match the
given name.
getNodeAttribute
public static String getNodeAttribute(Node node,
String name)
return the attribute value of an element.
node
- the node to get the attribute from.name
- the name of the attribute we are looking for the value.
- the value of the requested attribute or null if the
attribute was not found or if node is not an Element.
importNode
public static final Node importNode(Node parent,
Node child)
Simple tree walker that will clone recursively a node. This is to
avoid using parser-specific API such as Sun's changeNodeOwner
when we are dealing with DOM L1 implementations since cloneNode(boolean)
will not change the owner document.
changeNodeOwner is much faster and avoid the costly cloning process.
importNode is in the DOM L2 interface.
parent
- the node parent to which we should do the import to.child
- the node to clone recursively. Its clone will be
appended to parent.
- the cloned node that is appended to parent
listChildNodes
public static NodeList listChildNodes(Node parent,
DOMUtil.NodeFilter filter,
boolean recurse)
list a set of node that match a specific filter. The list can be made
recursively or not.
parent
- the parent node to search fromfilter
- the filter that children should match.recurse
- true if you want the list to be made recursively
otherwise false.
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