org.basex.query.xpath.locpath
Class Step

java.lang.Object
  org.basex.query.ExprInfo
      org.basex.query.xpath.locpath.Step

Direct Known Subclasses:

StepAnc, StepAncOrSelf, StepAttr, StepDesc, StepDescOrSelf, StepFoll, StepFollSibl, StepParent, StepPrec, StepPrecSibl, StepSelf

public abstract class Step
extends ExprInfo

Single Location Step.

Author:

Workgroup DBIS, University of Konstanz 2005-08, ISC License, Tim Petrowsky, Christian Gruen

Field Summary

Axis	axis Axis.
Preds	preds Predicate array.
Test	test Node test.

Constructor Summary

Step()

Method Summary

java.lang.String	color() Returns a string description of the expression.
void	plan(Serializer ser) Recursively sends the abstract syntax of this expression to the specified serializer.
boolean	sameAs(Step step) Checks location steps for equality.
boolean	simple(Axis ax) Checks if this is a simple axis (node test, no predicates).
int	simpleName(Axis ax, boolean name) Checks if this is a simple name axis (no predicates).
java.lang.String	toString()

Methods inherited from class org.basex.query.ExprInfo

info, name

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

axis

public Axis axis

Axis.

test

public Test test

Node test.

preds

public Preds preds

Predicate array.

Constructor Detail

Step

public Step()

Method Detail

simple

public final boolean simple(Axis ax)

Checks if this is a simple axis (node test, no predicates).

Parameters:

ax - axis to be checked

Returns:

result of check

simpleName

public final int simpleName(Axis ax,
                            boolean name)

Checks if this is a simple name axis (no predicates).

Parameters:

ax - axis to be checked

name - name reference needed

Returns:

name id or Integer.MIN_VALUE if test was negative

sameAs

public final boolean sameAs(Step step)

Checks location steps for equality.

Parameters:

step - location step

Returns:

false if no Position predicate

toString

public final java.lang.String toString()

Specified by:

toString in class ExprInfo

plan

public final void plan(Serializer ser)
                throws java.io.IOException

Description copied from class: ExprInfo

Recursively sends the abstract syntax of this expression to the specified serializer.

Specified by:

plan in class ExprInfo

Parameters:

ser - serializer

Throws:

java.io.IOException - exception

color

public final java.lang.String color()

Description copied from class: ExprInfo

Returns a string description of the expression. Contrary to the ExprInfo.toString() method, the current expressions aren't included in the output.

Overrides:

color in class ExprInfo

Returns:

result of check