NodeFactory

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

Direct Known Subclasses:

MatrixNodeFactory
```
public class NodeFactory
extends Object
```
This class is used to create nodes of specified types. It can be sub-classed 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.

Constructor Summary

Constructors
Constructor and Description

NodeFactory(XJep xj)

Constructors
Constructor and Description
`NodeFactory(XJep xj)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`ASTConstant`	`buildConstantNode(ASTConstant node)` Create an ASTConstant with same value as argument.
`ASTConstant`	`buildConstantNode(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(String name, PostfixMathCommandI pfmc, Node[] arguments)` Builds a function with n arguments This method should be sub-classed
`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 sub-classed
`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(String name, Object value)`
`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
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail
- NodeFactory
```
public NodeFactory(XJep xj)
```

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 whose children will be set.

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

buildConstantNode
```
public ASTConstant buildConstantNode(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 IllegalArgumentException,
                                     ParseException

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

Throws:: IllegalArgumentException; ParseException

buildConstantNode

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

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

Throws:: IllegalArgumentException; ParseException

buildConstantNode

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

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

Throws:: IllegalArgumentException; ParseException

buildConstantNode

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

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

Throws:: 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 sub-classed

Throws:

ParseException

buildVariableNode

public ASTVarNode buildVariableNode(String name,
                                    Object value)
                             throws ParseException

Throws:: ParseException

buildOperatorNode
```
public ASTFunNode buildOperatorNode(Operator op,
                                    Node[] arguments)
                             throws ParseException
```
Builds a operator node with n arguments This method should be sub-classed

Parameters:

op - the operator to use

arguments - the arguments to the function.

Returns:

top Node of expression

Throws:

ParseException

buildFunctionNode

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

Builds a function with n arguments This method should be sub-classed

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)
```
An unfinished node. Caller has responsibility for filling in the children.

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

Class NodeFactory

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

NodeFactory

Method Detail

copyChildren

buildConstantNode

buildConstantNode

buildConstantNode

buildConstantNode

buildConstantNode

buildConstantNode

buildVariableNode

buildVariableNode

buildVariableNode

buildOperatorNode

buildFunctionNode

buildUnfinishedOperatorNode

buildOperatorNode

buildOperatorNode

buildFunctionNode