ITree

All Implemented Interfaces:

java.io.Serializable
```
public interface ITree
 implements Serializable
                    
```
Represents a Tree of Objects(Node) of generic type T. The Tree is represented as a single rootElement which points to a List

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description

Field Summary

Fields
Modifier and Type	Field	Description

Constructor Summary

Constructors
Constructor	Description

Enum Constant Summary

Enum Constants
Enum Constant	Description

Method Summary

Modifier and Type	Method	Description
`abstract ITree`	`assignVarValue(Map<HashString, ITreeNode<out Object>> matches)`	This method substitutes variables present in matches map with their values.
`abstract double`	`evaluation(Map<HashString, ITreeNode<out Object>> matches)`	This evaluates the expression.
`abstract ITreeNode<out Object>`	`getRoot()`	Return the root Node of the tree.
`abstract HashString`	`toHashString()`	Similar to toString(), but returns a HashString.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
- Method Detail
  - assignVarValue
```
 abstract ITree assignVarValue(Map<HashString, ITreeNode<out Object>> matches)
```
    This method substitutes variables present in matches map with their values. It must involve only node of Typ=Var. The method must also recognize the values type stored in the map (they can be Const or Num).
    
    Parameters:
    
    matches - the map with variable values already assigned.
    
    Returns:
    
    a new ITree containing the instantiated variable
  - evaluation
```
 abstract double evaluation(Map<HashString, ITreeNode<out Object>> matches)
```
    This evaluates the expression. If the matches map contains values which are not instanced, and the expression value cannot consequently be computed, 0d is returned.
    
    Parameters:
    
    matches - the map that binds each variable with its own value
    
    Returns:
    
    A number representing the value for this expression. If the expression can't be computed, NaN is returned.
  - getRoot
```
 abstract ITreeNode<out Object> getRoot()
```
    Return the root Node of the tree.
    
    Returns:
    
    the root element.
  - toHashString
```
 abstract HashString toHashString()
```
    Similar to toString(), but returns a HashString.
    
    Returns:
    
    a HashString representation of this Object