org.geotools.data.complex.filter
Class XPathUtil
Object
XPathUtil
- Direct Known Subclasses:
- XPath
public class XPathUtil
- extends Object
Utility class to evaluate XPath expressions against an Attribute instance, which may be any
Attribute, whether it is simple, complex, a feature, etc.
At the difference of the Filter subsystem, which works against Attribute contents (for example to
evaluate a comparison filter), the XPath subsystem, for which this class is the single entry
point, works against Attribute instances. That is, the result of an XPath expression, if a single
value, is an Attribtue, not the attribute content, or a List of Attributes, for instance.
- Author:
- Gabriel Roldan (Axios Engineering), Rini Angreani (CSIRO Earth Science and Resource Engineering)
Methods inherited from class Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
XPathUtil
public XPathUtil()
rootElementSteps
public static XPathUtil.StepList rootElementSteps(AttributeDescriptor rootElement,
NamespaceSupport namespaces)
throws IllegalArgumentException
- Returns the list of steps in an x-path expression that represents the root element.
- Parameters:
root
- non null descriptor of the root attribute, generally the Feature descriptor.namespaces
- namespace support for generating qnames from namespaces.
- Returns:
- A list of unique of steps in an xpath expression.
- Throws:
IllegalArgumentException
- if root
is undefined.
steps
public static XPathUtil.StepList steps(AttributeDescriptor root,
String xpathExpression,
NamespaceSupport namespaces)
throws IllegalArgumentException
- Returns the list of stepts in
xpathExpression
by cleaning it up removing
unnecessary elements.
- Parameters:
root
- non null descriptor of the root attribute, generally the Feature descriptor. Used
to ignore the first step in xpathExpression if the expression's first step is
named as rootName.xpathExpression
-
- Returns:
-
- Throws:
IllegalArgumentException
- if xpathExpression
has no steps or it isn't a valid XPath expression
against type
.
equals
public static boolean equals(Name targetNodeName,
XPathUtil.StepList targetXPath)
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