Package com.singularsys.jep.misc.overloadedfunctions

Class OverloadResolver

java.lang.Object

com.singularsys.jep.walkers.GenericDoNothingVisitor<Void>

com.singularsys.jep.misc.overloadedfunctions.OverloadResolver

All Implemented Interfaces:

GenericVisitor<Node,Void,ParseException>, JepComponent, Serializable

public class OverloadResolver
extends GenericDoNothingVisitor<Void>

Resolves OverloadedOperator, OverloadedFunctionByStructure and AlternateFunctions setting the operator or PostfixMathCommand of the node based on a test of the node.

    UnaryFunction uf = new ArcTangent();
    BinaryFunction bf =new ArcTangent2();
    AlternateFunctions af = new AlternateFunctions(uf, bf);
    jep.addFunction("atan",af);
    jep.reinitializeComponents();
    OverloadResolver or = new OverloadResolver();
    Node node = jep.parse("atan(1)");
    or.visit(node);
    assertSame(uf,node.getPFMC()); // The single argument function is selected.
 

This visitor modifies the nodes in place.

See Also:

• Serialized Form

Field Summary

Fields inherited from class com.singularsys.jep.walkers.GenericDoNothingVisitor

ft, nf, ot

Constructor Summary

Constructors

Constructor	Description
OverloadResolver()

Method Summary

Modifier and Type	Method	Description
JepComponent	getLightWeightInstance()	Gets a light-weight instance suitable for using in multiple threads.
Node	visit(ASTFunNode node, Void data)	Visit a function node
Node	visit(ASTOpNode node, Void data)	Visit an operator node
Node	visit(Node node)	Visits the node and its dependents resolving OverloadedFunctionByStructure and AlternateFunctions.
Node	visit(Node node, Void data)	Visit a node calling the appropriate overloaded method.

Methods inherited from class com.singularsys.jep.walkers.GenericDoNothingVisitor

childrenHaveChanged, copyChildrenIfNeeded, copyChildrenIfNeeded, init, makeException, visit, visit

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.singularsys.jep.GenericVisitor

makeException, visitChildren

Constructor Details

OverloadResolver

public OverloadResolver()

Method Details

getLightWeightInstance

public JepComponent getLightWeightInstance()

Description copied from interface: JepComponent

Gets a light-weight instance suitable for using in multiple threads.

Specified by:

getLightWeightInstance in interface JepComponent

Overrides:

getLightWeightInstance in class GenericDoNothingVisitor<Void>

Returns:

either a new instance, null or 'this'.

visit

public Node visit(Node node)
           throws ParseException

Visits the node and its dependents resolving OverloadedFunctionByStructure and AlternateFunctions.

Parameters:

node - root node

Returns:

the same node, possible with operators and pfmc's replaced

Throws:

ParseException

visit

public Node visit(Node node,
 Void data)
           throws ParseException

Description copied from interface: GenericVisitor

Visit a node calling the appropriate overloaded method.

Parameters:

node - current node

data - context data passed to each child

Returns:

result of visiting the node

Throws:

ParseException

visit

public Node visit(ASTOpNode node,
 Void data)
           throws ParseException

Description copied from interface: GenericVisitor

Visit an operator node

Specified by:

visit in interface GenericVisitor<Node,Void,ParseException>

Overrides:

visit in class GenericDoNothingVisitor<Void>

Parameters:

node - current node

data - context data

Returns:

the result of visiting the node

Throws:

ParseException

visit

public Node visit(ASTFunNode node,
 Void data)
           throws ParseException

Description copied from interface: GenericVisitor

Visit a function node

Specified by:

visit in interface GenericVisitor<Node,Void,ParseException>

Overrides:

visit in class GenericDoNothingVisitor<Void>

Parameters:

node - current node

data - context data

Returns:

the result of visiting the node

Throws:

ParseException