org.jaxen.expr
Class DefaultLocationPath

java.lang.Object
  org.jaxen.expr.DefaultExpr
      org.jaxen.expr.DefaultLocationPath

All Implemented Interfaces:

java.io.Serializable, Expr, LocationPath

Direct Known Subclasses:

DefaultAbsoluteLocationPath, DefaultRelativeLocationPath

abstract class DefaultLocationPath
extends DefaultExpr
implements LocationPath

Field Summary

private java.util.List

steps

Constructor Summary

DefaultLocationPath()
Create a new empty location path.

Method Summary

void	addStep(Step step) Add the next step to this location path.
java.lang.Object	evaluate(Context context) Evaluate the expression in the given context, and return the result.
java.util.List	getSteps() Returns the ordered list of steps in this location path.
java.lang.String	getText() Returns a String containing the XPath expression.
boolean	isAbsolute() Returns true if this is an absolute location path; false if it isn't.
private boolean	isReverseAxis(Step step)
Expr	simplify() Simplifies the XPath expression.
java.lang.String	toString()

Methods inherited from class org.jaxen.expr.DefaultExpr

convertToIterator, convertToList

Methods inherited from class java.lang.Object

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

Field Detail

steps

private java.util.List steps

Constructor Detail

DefaultLocationPath

DefaultLocationPath()

Create a new empty location path.

Method Detail

addStep

public void addStep(Step step)

Description copied from interface: LocationPath

Add the next step to this location path.

Specified by:

addStep in interface LocationPath

getSteps

public java.util.List getSteps()

Description copied from interface: LocationPath

Returns the ordered list of steps in this location path. This list may be live.

Specified by:

getSteps in interface LocationPath

Returns:

the ordered list of steps in this location path

simplify

public Expr simplify()

Description copied from interface: Expr

Simplifies the XPath expression. For example, the expression //para[1 = 1] could be simplified to //para. In practice, this is usually a noop. Jaxen does not currently perform any simplification.

Specified by:

simplify in interface Expr

Overrides:

simplify in class DefaultExpr

Returns:

the simplified expression

getText

public java.lang.String getText()

Description copied from interface: Expr

Returns a String containing the XPath expression.

Specified by:

getText in interface Expr

Returns:

the text form of this XPath expression

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

isAbsolute

public boolean isAbsolute()

Description copied from interface: LocationPath

Returns true if this is an absolute location path; false if it isn't. Absolute location paths all begiune with / or //.

Specified by:

isAbsolute in interface LocationPath

Returns:

true if this is an absol;ute location path; false if it isn't

evaluate

public java.lang.Object evaluate(Context context)
                          throws JaxenException

Description copied from interface: Expr

Evaluate the expression in the given context, and return the result. The result will be a java.lang.Double for expressions that return a number, a java.lang.String for expressions that return a string, a java.lang.Boolean for expressions that return a boolean, and a java.util.List for expressions that return a node-set. In the latter case, the elements of the list are the actual objects from the source document model. Copies are not made.

Specified by:

evaluate in interface Expr

Parameters:

context - the context in which the expression is evaluated

Returns:

an object representing the result of the evaluation

Throws:

JaxenException

isReverseAxis

private boolean isReverseAxis(Step step)