Class JavaBeanXPath

java.lang.Object
org.jaxen.BaseXPath
org.jaxen.javabean.JavaBeanXPath
All Implemented Interfaces:
Serializable, XPath
public class JavaBeanXPath extends BaseXPath
An XPath implementation for JavaBeans.

This is the main entry point for matching an XPath against a JavaBean tree. You create a compiled XPath object, then match it against one or more context nodes using the BaseXPath.selectNodes(Object) method, as in the following example:

 Node node = ...;
 XPath path = new JavaBeanXPath("a/b/c");
 List results = path.selectNodes(node);
Author:
bob mcwhirter
See Also:

  • Constructor Details

    • JavaBeanXPath

      public JavaBeanXPath(String xpathExpr) throws JaxenException
      Construct given an XPath expression string.
      Parameters:
      xpathExpr - the XPath expression
      Throws:
      JaxenException - if there is a syntax error while parsing the expression

  • Method Details

    • getContext

      protected Context getContext(Object node)
      Description copied from class: BaseXPath
      Create a Context wrapper for the provided implementation-specific object.
      Overrides:
      getContext in class BaseXPath
      Parameters:
      node - the implementation-specific object to be used as the context
      Returns:
      a Context wrapper around the object

    • evaluate

      public Object evaluate(Object node) throws JaxenException
      Description copied from class: BaseXPath
      Evaluate this XPath against a given context. The context of evaluation may be any object type the navigator recognizes as a node. The return value is either a String, Double, Boolean, or List of nodes.

      When using this method, one must be careful to test the class of the returned object. If the returned object is a list, then the items in this list will be the actual Document, Element, Attribute, etc. objects as defined by the concrete XML object-model implementation, directly from the context document. This method does not return copies of anything, but merely returns references to objects within the source document.

      Specified by:
      evaluate in interface XPath
      Overrides:
      evaluate in class BaseXPath
      Parameters:
      node - the node, node-set or Context object for evaluation. This value can be null.
      Returns:
      the result of evaluating the XPath expression against the supplied context
      Throws:
      JaxenException - if an XPath error occurs during expression evaluation