Package org.geotools.data.complex.util
Class XPathUtil
Object
XPathUtil
- Direct Known Subclasses:
XPath
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)
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Nested Class Summary
Nested Classes -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionstatic boolean
equals
(Name targetNodeName, XPathUtil.StepList targetXPath) static XPathUtil.StepList
rootElementSteps
(AttributeDescriptor rootElement, NamespaceSupport namespaces) Returns the list of steps in an x-path expression that represents the root element.static XPathUtil.StepList
steps
(AttributeDescriptor root, String xpathExpression, NamespaceSupport namespaces) Returns the list of stepts inxpathExpression
by cleaning it up removing unnecessary elements.
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Constructor Details
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XPathUtil
public XPathUtil()
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Method Details
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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:
rootElement
- 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
- ifroot
is undefined.
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steps
public static XPathUtil.StepList steps(AttributeDescriptor root, String xpathExpression, NamespaceSupport namespaces) throws IllegalArgumentException Returns the list of stepts inxpathExpression
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.- Throws:
IllegalArgumentException
- ifxpathExpression
has no steps or it isn't a valid XPath expression againsttype
.
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equals
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