org.deri.iris
Class VariableExtractor

java.lang.Object
  org.deri.iris.VariableExtractor

public class VariableExtractor
extends Object

Helpermethods to extract variables from terms, tuples and literals.

$Id: VariableExtractor.java,v 1.1 2007-10-30 09:29:25 poettler_ric Exp $

Version:

$Revision: 1.1 $

Author:

Richard P??ttler (richard dot poettler at deri dot at)

Method Summary

static Set<IVariable>	getLiteralVariables(Collection<? extends ILiteral> l) Retrieves the variables out of a collection of literals.
static Collection<IVariable>	getLiteralVariables(Collection<? extends ILiteral> from, Collection<IVariable> to) Retrieves the variables out of a collection of literals.
static List<IVariable>	getLiteralVariablesList(Collection<? extends ILiteral> l) Retrieves the variables out of a collection of literals.
static Set<IVariable>	getTermVariables(Collection<? extends ITerm> t) Retrieves the variables out of a collection of terms.
static Collection<IVariable>	getTermVariables(Collection<? extends ITerm> from, Collection<IVariable> to) Retrieves the variables out of a collection of terms.
static List<IVariable>	getTermVariablesList(Collection<? extends ITerm> t) Retrieves the variables out of a collection of terms.
static Set<IVariable>	getTupleVariables(Collection<? extends ITuple> t) Retrieves the variables out of a collection of tuples.
static Collection<IVariable>	getTupleVariables(Collection<? extends ITuple> from, Collection<IVariable> to) Retrieves the variables out of a collection of tuples.
static List<IVariable>	getTupleVariablesList(Collection<? extends ITuple> t) Retrieves the variables out of a collection of tuples.
static Set<IVariable>	getVariables(ILiteral... l) Retrieves the variables out of a array of literals.
static Set<IVariable>	getVariables(ITerm... t) Retrieves the variables out of a array of terms.
static Set<IVariable>	getVariables(ITuple... t) Retrieves the variables out of a array of tuples.
static List<IVariable>	getVariablesList(ILiteral... l) Retrieves the variables out of a array of literals.
static List<IVariable>	getVariablesList(ITerm... t) Retrieves the variables out of a array of terms.
static List<IVariable>	getVariablesList(ITuple... t) Retrieves the variables out of a array of tuples.

Methods inherited from class java.lang.Object

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

Method Detail

getTermVariables

public static Collection<IVariable> getTermVariables(Collection<? extends ITerm> from,
                                                     Collection<IVariable> to)

Retrieves the variables out of a collection of terms.

Parameters:

from - the terms

to - the collection where to add the variables to

Returns:

the reference to to

Throws:

IllegalArgumentException - if t is null

IllegalArgumentException - if to is null

getTupleVariables

public static Collection<IVariable> getTupleVariables(Collection<? extends ITuple> from,
                                                      Collection<IVariable> to)

Retrieves the variables out of a collection of tuples.

Parameters:

from - the tuples

to - the collection where to add the variables to

Returns:

the reference to to

Throws:

IllegalArgumentException - if t is null

IllegalArgumentException - if to is null

getLiteralVariables

public static Collection<IVariable> getLiteralVariables(Collection<? extends ILiteral> from,
                                                        Collection<IVariable> to)

Retrieves the variables out of a collection of literals.

Parameters:

from - the literals

to - the collection where to add the variables to

Returns:

the reference to to

Throws:

IllegalArgumentException - if t is null

IllegalArgumentException - if to is null

getTermVariablesList

public static List<IVariable> getTermVariablesList(Collection<? extends ITerm> t)

Retrieves the variables out of a collection of terms.

Parameters:

t - the terms

Returns:

the list of variables

Throws:

IllegalArgumentException - if the collection is null

getTupleVariablesList

public static List<IVariable> getTupleVariablesList(Collection<? extends ITuple> t)

Retrieves the variables out of a collection of tuples.

Parameters:

t - the tuples

Returns:

the list of variables

Throws:

IllegalArgumentException - if the collection is null

getLiteralVariablesList

public static List<IVariable> getLiteralVariablesList(Collection<? extends ILiteral> l)

Retrieves the variables out of a collection of literals.

Parameters:

t - the literals

Returns:

the list of variables

Throws:

IllegalArgumentException - if the collection is null

getTermVariables

public static Set<IVariable> getTermVariables(Collection<? extends ITerm> t)

Retrieves the variables out of a collection of terms.

Parameters:

t - the terms

Returns:

the list of variables

Throws:

IllegalArgumentException - if the collection is null

getTupleVariables

public static Set<IVariable> getTupleVariables(Collection<? extends ITuple> t)

Retrieves the variables out of a collection of tuples.

Parameters:

t - the tuples

Returns:

the list of variables

Throws:

IllegalArgumentException - if the collection is null

getLiteralVariables

public static Set<IVariable> getLiteralVariables(Collection<? extends ILiteral> l)

Retrieves the variables out of a collection of literals.

Parameters:

t - the literals

Returns:

the list of variables

Throws:

IllegalArgumentException - if the collection is null

getVariablesList

public static List<IVariable> getVariablesList(ITerm... t)

Retrieves the variables out of a array of terms.

Parameters:

t - the terms

Returns:

the list of variables

Throws:

IllegalArgumentException - if the collection is null

getVariablesList

public static List<IVariable> getVariablesList(ITuple... t)

Retrieves the variables out of a array of tuples.

Parameters:

t - the tuples

Returns:

the list of variables

Throws:

IllegalArgumentException - if the collection is null

getVariablesList

public static List<IVariable> getVariablesList(ILiteral... l)

Retrieves the variables out of a array of literals.

Parameters:

t - the literals

Returns:

the list of variables

Throws:

IllegalArgumentException - if the collection is null

getVariables

public static Set<IVariable> getVariables(ITerm... t)

Retrieves the variables out of a array of terms.

Parameters:

t - the terms

Returns:

the list of variables

Throws:

IllegalArgumentException - if the collection is null

getVariables

public static Set<IVariable> getVariables(ITuple... t)

Retrieves the variables out of a array of tuples.

Parameters:

t - the tuples

Returns:

the list of variables

Throws:

IllegalArgumentException - if the collection is null

getVariables

public static Set<IVariable> getVariables(ILiteral... l)

Retrieves the variables out of a array of literals.

Parameters:

t - the literals

Returns:

the list of variables

Throws:

IllegalArgumentException - if the collection is null