com.caucho.xpath.expr

Class NodeSetExpr

java.lang.Object

com.caucho.xpath.Expr

com.caucho.xpath.expr.NodeSetExpr

public class NodeSetExpr
extends Expr

Field Summary

Fields inherited from class com.caucho.xpath.Expr

ADD, AND, ATTRIBUTE, BASE_URI, BOOLEAN, BOOLEAN_EQ, BOOLEAN_NEQ, CEILING, CONCAT, CONST, CONTAINS, COUNT, DIV, ELEMENT, EQ, FALSE, FLOOR, FORMAT_NUMBER, FUNCTION_AVAILABLE, GE, GENERATE_ID, GT, ID, IF, LANG, LAST, LAST_FUN, LE, LOCAL_PART, LT, MOD, MUL, NAMESPACE, NEG, NEQ, NODE_SET, NORMALIZE, NOT, NUMBER, NUMBER_EQ, NUMBER_GE, NUMBER_GT, NUMBER_LE, NUMBER_LT, NUMBER_NEQ, OR, POSITION, QNAME, QUO, ROUND, SELF, SELF_NAME, STARTS_WITH, STRING, STRING_EQ, STRING_LENGTH, STRING_NEQ, SUB, SUBSTRING, SUBSTRING_AFTER, SUBSTRING_BEFORE, SUM, SYSTEM_PROPERTY, TRANSLATE, TRUE

Method Summary

Modifier and Type	Method and Description
static Expr	create(AbstractPattern pattern) Creates an expr, handling some special cases.
boolean	equals(java.lang.Object b)
boolean	evalBoolean(org.w3c.dom.Node node, ExprEnvironment env) Returns true if there are any patterns matching the pattern.
NodeIterator	evalNodeSet(org.w3c.dom.Node node, ExprEnvironment env) Evaluate a node-set object, returning an iterator of the node set.
double	evalNumber(org.w3c.dom.Node node, ExprEnvironment env) Returns the value of the expression as a number.
java.lang.Object	evalObject(org.w3c.dom.Node node, ExprEnvironment env) Evaluate a node-set object, returning an ArrayList of the node set.
java.lang.String	evalString(org.w3c.dom.Node node, ExprEnvironment env) Returns the value of the node set expression as a string.
AbstractPattern	getPattern() Returns the underlying pattern.
boolean	isNodeSet() NodeSetExprs prefer to be node sets.
protected AbstractPattern	toNodeList() Convert from an expression to a pattern.
java.lang.String	toString()

Methods inherited from class com.caucho.xpath.Expr

addParam, addVar, evalBoolean, evalNodeSet, evalNumber, evalObject, evalString, evalString, evalString, evalVar, getListContext, isBoolean, isNumber, isString, setListContext, setVar, stringToNumber, toBoolean, toDouble, toNode, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Method Detail

create

public static Expr create(AbstractPattern pattern)

Creates an expr, handling some special cases.

getPattern

public AbstractPattern getPattern()

Returns the underlying pattern.

isNodeSet

public boolean isNodeSet()

NodeSetExprs prefer to be node sets.

Overrides:

isNodeSet in class Expr

evalNumber

public double evalNumber(org.w3c.dom.Node node,
                         ExprEnvironment env)
                  throws XPathException

Returns the value of the expression as a number.

Specified by:

evalNumber in class Expr

Parameters:

node - the current node

env - the variable environment.

Returns:

the numeric value.

Throws:

XPathException

evalBoolean

public boolean evalBoolean(org.w3c.dom.Node node,
                           ExprEnvironment env)
                    throws XPathException

Returns true if there are any patterns matching the pattern.

Specified by:

evalBoolean in class Expr

Parameters:

node - the current node

env - the variable environment.

Returns:

the boolean value.

Throws:

XPathException

evalString

public java.lang.String evalString(org.w3c.dom.Node node,
                                   ExprEnvironment env)
                            throws XPathException

Returns the value of the node set expression as a string. The value is the text value of the first node.

Specified by:

evalString in class Expr

Parameters:

node - the current node

env - the variable environment

Returns:

the combined text value of the node.

Throws:

XPathException

evalObject

public java.lang.Object evalObject(org.w3c.dom.Node node,
                                   ExprEnvironment env)
                            throws XPathException

Evaluate a node-set object, returning an ArrayList of the node set.

Specified by:

evalObject in class Expr

Parameters:

node - the current node

env - the variable environment

Returns:

an array list of the nodes

Throws:

XPathException

evalNodeSet

public NodeIterator evalNodeSet(org.w3c.dom.Node node,
                                ExprEnvironment env)
                         throws XPathException

Evaluate a node-set object, returning an iterator of the node set.

Overrides:

evalNodeSet in class Expr

Parameters:

node - the current node

env - the variable environment

Returns:

an iterator of the nodes

Throws:

XPathException

toNodeList

protected AbstractPattern toNodeList()

Convert from an expression to a pattern.

Overrides:

toNodeList in class Expr

equals

public boolean equals(java.lang.Object b)

Overrides:

equals in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object