org.lsmp.djep.xjep
Class NodeFactory

java.lang.Object
  org.lsmp.djep.xjep.NodeFactory

Direct Known Subclasses:

MatrixNodeFactory

public class NodeFactory

extends java.lang.Object

This class is used to create nodes of specified types. It can be subclassed to change the nature of how nodes are constructed. Generally there are two methods for creating nodes, methods which take an existing node and methods which take the components.

Author:

Rich Morris Created on 16-Nov-2003

Constructor Summary

NodeFactory()

Method Summary

ASTConstant	buildConstantNode(ASTConstant node) Create an ASTConstant with same value as argument.
ASTConstant	buildConstantNode(java.lang.Object value) Creates an ASTConstant node with specified value.
ASTConstant	buildConstantNode(Operator op, Node child1) Creates a ASTConstant whose value of applying a unary operator to its arguments.
ASTConstant	buildConstantNode(Operator op, Node[] children) Creates a ASTConstant whose value of applying the operator to its arguments.
ASTConstant	buildConstantNode(Operator op, Node child1, Node child2) Creates a ASTConstant whose value of applying binary operator to its arguments.
ASTConstant	buildConstantNode(PostfixMathCommandI pfmc, Node[] children) Creates a ASTConstant whose value of applying the operator to its arguments.
ASTFunNode	buildFunctionNode(ASTFunNode node, Node[] arguments) Builds a function with n arguments and same fun as specified in arguments.
ASTFunNode	buildFunctionNode(java.lang.String name, PostfixMathCommandI pfmc, Node[] arguments) Builds a function with n arguments This method should be subclassed
ASTFunNode	buildOperatorNode(Operator op, Node child) creates a unary function.
ASTFunNode	buildOperatorNode(Operator op, Node[] arguments) Builds a operator node with n arguments This method should be subclassed
ASTFunNode	buildOperatorNode(Operator op, Node lhs, Node rhs) creates a binary function.
ASTFunNode	buildUnfinishedOperatorNode(Operator op) An unfinished node.
ASTVarNode	buildVariableNode(ASTVarNode node) creates a new ASTVarNode with the same name as argument.
ASTVarNode	buildVariableNode(Variable var) creates a new ASTVarNode with a given variable.
void	copyChildren(Node node, Node[] children) Sets the children of node to be those specified in array.

Methods inherited from class java.lang.Object

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

Constructor Detail

NodeFactory

public NodeFactory()

Method Detail

copyChildren

public void copyChildren(Node node,
                         Node[] children)

Sets the children of node to be those specified in array.

Parameters:

node - the node whos children will be set.

children - an array of nodes which will be the children of the node.

buildConstantNode

public ASTConstant buildConstantNode(java.lang.Object value)
                              throws ParseException

Creates an ASTConstant node with specified value. This method should be overwritten by subclasses.

Throws:

ParseException

buildConstantNode

public ASTConstant buildConstantNode(ASTConstant node)
                              throws ParseException

Create an ASTConstant with same value as argument.

Throws:

ParseException

buildConstantNode

public ASTConstant buildConstantNode(PostfixMathCommandI pfmc,
                                     Node[] children)
                              throws java.lang.IllegalArgumentException,
                                     ParseException

Creates a ASTConstant whose value of applying the operator to its arguments.

Throws:

java.lang.IllegalArgumentException

ParseException

buildConstantNode

public ASTConstant buildConstantNode(Operator op,
                                     Node[] children)
                              throws java.lang.IllegalArgumentException,
                                     ParseException

Creates a ASTConstant whose value of applying the operator to its arguments.

Throws:

java.lang.IllegalArgumentException

ParseException

buildConstantNode

public ASTConstant buildConstantNode(Operator op,
                                     Node child1,
                                     Node child2)
                              throws java.lang.IllegalArgumentException,
                                     ParseException

Creates a ASTConstant whose value of applying binary operator to its arguments.

Throws:

java.lang.IllegalArgumentException

ParseException

buildConstantNode

public ASTConstant buildConstantNode(Operator op,
                                     Node child1)
                              throws java.lang.IllegalArgumentException,
                                     ParseException

Creates a ASTConstant whose value of applying a unary operator to its arguments.

Throws:

java.lang.IllegalArgumentException

ParseException

buildVariableNode

public ASTVarNode buildVariableNode(ASTVarNode node)
                             throws ParseException

creates a new ASTVarNode with the same name as argument.

Throws:

ParseException

buildVariableNode

public ASTVarNode buildVariableNode(Variable var)
                             throws ParseException

creates a new ASTVarNode with a given variable. This method should be subclassed

Throws:

ParseException

buildOperatorNode

public ASTFunNode buildOperatorNode(Operator op,
                                    Node[] arguments)
                             throws ParseException

Builds a operator node with n arguments This method should be subclassed

Parameters:

arguments - the arguments to the function.

Returns:

top Node of expression

Throws:

ParseException

buildFunctionNode

public ASTFunNode buildFunctionNode(java.lang.String name,
                                    PostfixMathCommandI pfmc,
                                    Node[] arguments)
                             throws ParseException

Builds a function with n arguments This method should be subclassed

Parameters:

name - of function.

pfmc - PostfixMathCommand for function.

arguments - the arguments to the function.

Returns:

top Node of expression

Throws:

ParseException

buildUnfinishedOperatorNode

public ASTFunNode buildUnfinishedOperatorNode(Operator op)
                                       throws ParseException

An unfinished node. Caller has responsability for filling in the children.

Throws:

ParseException

buildOperatorNode

public ASTFunNode buildOperatorNode(Operator op,
                                    Node child)
                             throws ParseException

creates a unary function.

Throws:

ParseException

buildOperatorNode

public ASTFunNode buildOperatorNode(Operator op,
                                    Node lhs,
                                    Node rhs)
                             throws ParseException

creates a binary function.

Throws:

ParseException

buildFunctionNode

public ASTFunNode buildFunctionNode(ASTFunNode node,
                                    Node[] arguments)
                             throws ParseException

Builds a function with n arguments and same fun as specified in arguments.

Parameters:

node - the properties (name and pfmc) of this node will be copied.

arguments - the arguments to the function.

Returns:

top Node of expression

Throws:

ParseException