org.basex.query.xpath.locpath
Class Steps

java.lang.Object
  org.basex.query.xpath.locpath.Steps

public final class Steps
extends java.lang.Object

Location Steps.

Author:

Workgroup DBIS, University of Konstanz 2005-07, ISC License, Christian Gruen

Constructor Summary

Steps()

Method Summary

void	add(int s, Step step) Adds the specified step at the specified position.
void	add(Step step) Adds the specified step.
boolean	compile(XPContext ctx) Optimizes the predicates.
NodeSet	eval(XPContext ctx) Evaluates the location steps.
Step	get(int s) Returns the specified step.
Step	last() Returns the last location step.
void	remove(int s) Removes the specified step.
boolean	sameAs(Steps stps) Returns the location steps for equality.
void	set(int s, Step step) Sets the specified step.
int	size() Returns the number of location steps.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

Steps

public Steps()

Method Detail

add

public void add(int s,
                Step step)

Adds the specified step at the specified position.

Parameters:

s - step index

step - step to be added

add

public void add(Step step)

Adds the specified step.

Parameters:

step - step to be added

compile

public boolean compile(XPContext ctx)
                throws EvalException

Optimizes the predicates.

Parameters:

ctx - query context

Returns:

false if location step yields no results

Throws:

EvalException - evaluation exception

eval

public NodeSet eval(XPContext ctx)
             throws EvalException

Evaluates the location steps.

Parameters:

ctx - query context

Returns:

result of check

Throws:

EvalException - evaluation exception

get

public Step get(int s)

Returns the specified step.

Parameters:

s - step index

Returns:

location step

last

public Step last()

Returns the last location step.

Returns:

location step

remove

public void remove(int s)

Removes the specified step.

Parameters:

s - step index

sameAs

public boolean sameAs(Steps stps)

Returns the location steps for equality.

Parameters:

stps - location steps to be compared

Returns:

result of check

set

public void set(int s,
                Step step)

Sets the specified step.

Parameters:

s - step index

step - step to be set

size

public int size()

Returns the number of location steps.

Returns:

number of steps

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object