ConstRewriter (Jenetics 6.1.0)

java.lang.Object
- io.jenetics.prog.op.ConstRewriter<T>

Type Parameters:

T - the operation type the rewriter is working on

All Implemented Interfaces:

TreeRewriter<Op<T>>
```
public final class ConstRewriter<T>
extends Object
implements TreeRewriter<Op<T>>
```
This class rewrites constant expressions to its single value.
The following example show how to use the rewriter for a double operation tree:
final TreeNode<Op<Double>> tree = MathExpr.parseTree("1 + 2 + 3 + 4"); ConstRewriter.ofType(Double.class).rewrite(tree); assert tree.getValue().equals(Const.of(10.0));

Since:

5.2

Version:

5.2

Field Summary

Fields
Modifier and Type Field Description

static ConstRewriter<Double> DOUBLE
Const rewriter for double operation trees.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`static <T> ConstRewriter<T>`	`ofType(Class<? extends T> type)`	Create a new rewriter for constant operation sub-trees (expressions).
`int`	`rewrite(TreeNode<Op<T>> node, int limit)`
`String`	`toString()`
`Class<T>`	`type()`	Return the operation type this rewriter is working on.

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

Methods inherited from interface io.jenetics.ext.rewriting.TreeRewriter
rewrite

- Field Detail
  - DOUBLE
```
public static final ConstRewriter<Double> DOUBLE
```
    Const rewriter for double operation trees.
- Method Detail
  - type
```
public Class<T> type()
```
    Return the operation type this rewriter is working on.
    
    Returns:
    
    the operation type this rewriter is working on
  - rewrite
```
public int rewrite(TreeNode<Op<T>> node,
                   int limit)
```
    Specified by:
    
    rewrite in interface TreeRewriter<T>
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object
  - ofType
```
public static <T> ConstRewriter<T> ofType(Class<? extends T> type)
```
    Create a new rewriter for constant operation sub-trees (expressions).
    
    Type Parameters:
    
    T - the type of the operation tree
    
    Parameters:
    
    type - the type of the operation tree
    
    Returns:
    
    a new rewriter for constant operation sub-trees (expressions)
    
    Throws:
    
    NullPointerException - if the given type is null