ExpressionNode (singa-simulation 0.7.0 API)

All Known Implementing Classes:

AdditionExpressionNode, ConstantExpressionNode, ExponentiationExpressionNode, FunctionExpressionNode, MultiplicationExpressionNode, SequenceExpressionNode, VariableExpressionNode
```
public interface ExpressionNode
```
An interface for expression nodes. Every concrete type of expression node has to implement this interface.

Field Summary

Fields
Modifier and Type	Field	Description
`static int`	`ADDITION_NODE`	Node id for addition nodes
`static int`	`CONSTANT_NODE`	Node id for constant nodes
`static int`	`EXPONENTIATION_NODE`	Node id for exponentiation nodes
`static int`	`FUNCTION_NODE`	Node id for function nodes
`static int`	`MULTIPLICATION_NODE`	Node id for multiplication nodes
`static int`	`VARIABLE_NODE`	Node id for variable nodes

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`accept(ExpressionNodeVisitor visitor)`	Method needed for the visitor design pattern
`int`	`getType()`	Returns the type of the node.ExpressionNode Each class derived from ExpressionNode representing a specific role in the expression should return the type according to that role.
`double`	`getValue()`	Calculates and returns the value of the sub-expression represented by the node.

- Field Detail
  - VARIABLE_NODE
```
static final int VARIABLE_NODE
```
    Node id for variable nodes
    
    See Also:
    
    Constant Field Values
  - CONSTANT_NODE
```
static final int CONSTANT_NODE
```
    Node id for constant nodes
    
    See Also:
    
    Constant Field Values
  - ADDITION_NODE
```
static final int ADDITION_NODE
```
    Node id for addition nodes
    
    See Also:
    
    Constant Field Values
  - MULTIPLICATION_NODE
```
static final int MULTIPLICATION_NODE
```
    Node id for multiplication nodes
    
    See Also:
    
    Constant Field Values
  - EXPONENTIATION_NODE
```
static final int EXPONENTIATION_NODE
```
    Node id for exponentiation nodes
    
    See Also:
    
    Constant Field Values
  - FUNCTION_NODE
```
static final int FUNCTION_NODE
```
    Node id for function nodes
    
    See Also:
    
    Constant Field Values
- Method Detail
  - getType
```
int getType()
```
    Returns the type of the node.ExpressionNode Each class derived from ExpressionNode representing a specific role in the expression should return the type according to that role.
    
    Returns:
    
    type of the node
  - getValue
```
double getValue()
```
    Calculates and returns the value of the sub-expression represented by the node.
    
    Returns:
    
    value of expression
  - accept
```
void accept(ExpressionNodeVisitor visitor)
```
    Method needed for the visitor design pattern
    
    Parameters:
    
    visitor - the visitor