org.matheclipse.core.convert

Class VariablesSet

java.lang.Object

org.matheclipse.core.convert.VariablesSet

public class VariablesSet
extends java.lang.Object

Determine the variable symbols from a Symja expression and store them internally in a java.util.Set.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	VariablesSet.IsMemberVisitor Return true, if the expression contains one of the variable store in the internal java.util.Set.
static class	VariablesSet.VariablesVisitor Collect the variables with the IExpr#isVariable() method.

Constructor Summary

Constructors

Constructor and Description
VariablesSet() Constructor for an empty instance.
VariablesSet(IExpr expression) Determine the variable symbols from a Symja expression.

Method Summary

Modifier and Type	Method and Description
boolean	add(IExpr symbol) Add the symbol to the set of variables.
void	addVarList(IAST rest, int fromIndex) Add the variables of the given expression
void	addVarList(IExpr expression) Add the variables of the given expression
java.util.List<IExpr>	appendToList(java.util.List<IExpr> list) Append the set of variables to a List<IExpr> list of variables.
boolean	contains(ISymbol o) Searches the set for the specified object.
boolean	containsAll(java.util.Collection<? extends IExpr> c) Searches this set for all objects in the specified collection.
java.util.List<IExpr>	getArrayList() Transform the set of variables into a List<IExpr> list of ordered variables.
IAST	getVarList() Transform the set of variables into an IAST list of ordered variables.
java.lang.String[]	getVarListAsString()
boolean	isEmpty() Returns true if this set of variables has no elements.
static java.util.function.Predicate<IExpr>	isFree(VariablesSet exprVar) Return a Predicate which tests, if the given input is free of the variables set.
boolean	isSize(int size) Check if the expression contains the given number of variables.
int	size() The number of determined variables.
IExpr[]	toArray(IExpr[] a)

Methods inherited from class java.lang.Object

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

Constructor Detail

VariablesSet

public VariablesSet()

Constructor for an empty instance.

VariablesSet

public VariablesSet(IExpr expression)

Determine the variable symbols from a Symja expression.

Method Detail

isFree

public static java.util.function.Predicate<IExpr> isFree(VariablesSet exprVar)

Return a Predicate which tests, if the given input is free of the variables set.

Parameters:

exprVar -

Returns:

add

public boolean add(IExpr symbol)

Add the symbol to the set of variables.

Parameters:

symbol -

Returns:

true if the underlying set did not already contain the symbol

addVarList

public void addVarList(IExpr expression)

Add the variables of the given expression

Parameters:

expression -

addVarList

public void addVarList(IAST rest,
                       int fromIndex)

Add the variables of the given expression

Parameters:

expression -

appendToList

public java.util.List<IExpr> appendToList(java.util.List<IExpr> list)

Append the set of variables to a List<IExpr> list of variables.

Returns:

the list of variables.

contains

public boolean contains(ISymbol o)

Searches the set for the specified object.

Parameters:

o -

Returns:

See Also:

Set.contains(java.lang.Object)

containsAll

public boolean containsAll(java.util.Collection<? extends IExpr> c)

Searches this set for all objects in the specified collection.

Parameters:

c -

Returns:

See Also:

Set.containsAll(java.util.Collection)

getArrayList

public java.util.List<IExpr> getArrayList()

Transform the set of variables into a List<IExpr> list of ordered variables.

Returns:

the ordered list of variables.

getVarList

public IAST getVarList()

Transform the set of variables into an IAST list of ordered variables.

Returns:

the ordered list of variables.

getVarListAsString

public java.lang.String[] getVarListAsString()

isEmpty

public boolean isEmpty()

Returns true if this set of variables has no elements.

Returns:

See Also:

Set.isEmpty()

isSize

public boolean isSize(int size)

Check if the expression contains the given number of variables.

Parameters:

expr -

Returns:

true if the expr contains the given number of variables.

size

public int size()

The number of determined variables.

Returns:

toArray

public IExpr[] toArray(IExpr[] a)

Parameters:

a -

Returns:

See Also:

java.util.Set#toArray(T[])