org.exolab.adaptx.xpath.expressions
Interface NodeExpression

All Superinterfaces:

MatchExpression, XPathExpression

public interface NodeExpression

extends XPathExpression, MatchExpression

Represents an XPath node expression.

Author:

Keith Visco

Field Summary

static short	ANY_EXPR The node expression type that selects or matches "any" node.
static short	ATTRIBUTE_EXPR The node expression type that selects or matches attribute nodes
static short	COMMENT_EXPR The node expression type that selects or matches comment nodes
static short	ELEMENT_EXPR The node expression type that selects or matches element nodes
static short	ID_EXPR The node expression type that selects or matches any element node with a specific ID
static short	IDENTITY_EXPR The node expression type that selects or matches the current context node
static short	NAMESPACE_EXPR The node expression type that selects or matches namespace nodes
static short	PARENT_EXPR The node expression type that selects or matches the parent node of the current context node.
static short	PI_EXPR The node expression type that selects or matches Processing Instruction nodes
static short	TEXT_EXPR The node expression type that selects or matches text nodes
static short	WILDCARD_EXPR The node expression type that selects or matches any element node

Fields inherited from interface org.exolab.adaptx.xpath.XPathExpression

BOOLEAN, ERROR, FILTER_EXPR, LOCATION_PATH, NODE_TEST, NUMBER, PATH_EXPR, PRIMARY, STEP, STRING, UNION_EXPR

Method Summary

java.lang.String	getName() Returns the QName matched by this NodeExpression.
short	getNodeExprType() Returns the type of this Node exprression, the value must be one of the value Node expression types.
boolean	matches(XPathNode node, XPathContext context) Determines if the given node is matched by this MatchExpr with respect to the given context.

Methods inherited from interface org.exolab.adaptx.xpath.XPathExpression

evaluate, getExprType, toString

Field Detail

ANY_EXPR

public static final short ANY_EXPR

The node expression type that selects or matches "any" node.

See Also:

Constant Field Values

ATTRIBUTE_EXPR

public static final short ATTRIBUTE_EXPR

The node expression type that selects or matches attribute nodes

See Also:

Constant Field Values

ELEMENT_EXPR

public static final short ELEMENT_EXPR

The node expression type that selects or matches element nodes

See Also:

Constant Field Values

ID_EXPR

public static final short ID_EXPR

The node expression type that selects or matches any element node with a specific ID

See Also:

Constant Field Values

IDENTITY_EXPR

public static final short IDENTITY_EXPR

The node expression type that selects or matches the current context node

See Also:

Constant Field Values

PARENT_EXPR

public static final short PARENT_EXPR

The node expression type that selects or matches the parent node of the current context node.

See Also:

Constant Field Values

TEXT_EXPR

public static final short TEXT_EXPR

The node expression type that selects or matches text nodes

See Also:

Constant Field Values

COMMENT_EXPR

public static final short COMMENT_EXPR

The node expression type that selects or matches comment nodes

See Also:

Constant Field Values

PI_EXPR

public static final short PI_EXPR

The node expression type that selects or matches Processing Instruction nodes

See Also:

Constant Field Values

WILDCARD_EXPR

public static final short WILDCARD_EXPR

The node expression type that selects or matches any element node

See Also:

Constant Field Values

NAMESPACE_EXPR

public static final short NAMESPACE_EXPR

The node expression type that selects or matches namespace nodes

See Also:

Constant Field Values

Method Detail

getNodeExprType

public short getNodeExprType()

Returns the type of this Node exprression, the value must be one of the value Node expression types.

Returns:

the type of this Node expression

getName

public java.lang.String getName()

Returns the QName matched by this NodeExpression. The value may be null, for example if this is a TEXT_EXPR or a WILDCARD_EXPR.

Returns:

the QName matched by this NodeExpression.

matches

public boolean matches(XPathNode node,
                       XPathContext context)
                throws XPathException

Determines if the given node is matched by this MatchExpr with respect to the given context.

Specified by:

matches in interface MatchExpression

Parameters:

node - the node to determine a match for

context - the XPathContext

Returns:

true if the given node is matched by this MatchExpr

Throws:

XPathException - when an error occurs during evaluation