Module io.jenetics.prog

Package io.jenetics.prog.op

Class ConstRewriter<T>

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

Method Summary

Modifier and Type	Method	Description
static <T> ConstRewriter<T>	ofType(Class<? extends T> type)	Create a new rewriter for constant operation subtrees (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 Details

DOUBLE

public static final ConstRewriter<Double> DOUBLE

Const rewriter for double operation trees.

Method Details

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 subtrees (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 subtrees (expressions)

Throws:

NullPointerException - if the given type is null