Class Expr

protected static final DecimalFormat decimalFormat

protected static final Comparator documentOrderComparator

public static boolean _boolean(Node context,
                               Object object)

Implementation of the XPath boolean function.

public static Collection _id(Node context,
                                   Object object)

The id function selects elements by their unique ID. When the argument to id is of type node-set, then the result is the union of the result of applying id to the string-value of each of the nodes in the argument node-set. When the argument to id is of any other type, the argument is converted to a string as if by a call to the string function; the string is split into a whitespace-separated list of tokens (whitespace is any sequence of characters matching the production S); the result is a node-set containing the elements in the same document as the context node that have a unique ID equal to any of the tokens in the list.

public static String _local_name(Node context,
                                 Collection nodeSet)

The local-name function returns the local part of the expanded-name of the node in the argument node-set that is first in document order. If the argument node-set is empty or the first node has no expanded-name, an empty string is returned. If the argument is omitted, it defaults to a node-set with the context node as its only member.

public static String _name(Node context,
                           Collection nodeSet)

The name function returns a string containing a QName representing the expanded-name of the node in the argument node-set that is first in document order. The QName must represent the expanded-name with respect to the namespace declarations in effect on the node whose expanded-name is being represented. Typically, this will be the QName that occurred in the XML source. This need not be the case if there are namespace declarations in effect on the node that associate multiple prefixes with the same namespace. However, an implementation may include information about the original prefix in its representation of nodes; in this case, an implementation can ensure that the returned string is always the same as the QName used in the XML source. If the argument node-set is empty or the first node has no expanded-name, an empty string is returned. If the argument it omitted, it defaults to a node-set with the context node as its only member.

public static String _namespace_uri(Node context,
                                    Collection nodeSet)

The namespace-uri function returns the namespace URI of the expanded-name of the node in the argument node-set that is first in document order. If the argument node-set is empty, the first node has no expanded-name, or the namespace URI of the expanded-name is null, an empty string is returned. If the argument is omitted, it defaults to a node-set with the context node as its only member.

public static double _number(Node context,
                             Object object)

Implementation of the XPath number function.

public static String _string(Node context,
                             Object object)

Implementation of the XPath string function.

public abstract Expr clone(Object context)

public String evaluate(Object item)
            throws XPathExpressionException

Specified by:

evaluate in interface XPathExpression

public Object evaluate(Object item,
                       QName returnType)
            throws XPathExpressionException

Specified by:

evaluate in interface XPathExpression

public abstract Object evaluate(Node context,
                                int pos,
                                int len)

public String evaluate(InputSource source)
            throws XPathExpressionException

Specified by:

evaluate in interface XPathExpression

public Object evaluate(InputSource source,
                       QName returnType)
            throws XPathExpressionException

Specified by:

evaluate in interface XPathExpression

public abstract boolean references(QName var)

public static String stringValue(Collection nodeSet)

Computes the XPath string-value of the specified node-set.

public static String stringValue(Node node)

Computes the XPath string-value of the specified node.