TreeMatcher (Jenetics 6.3.0)

java.lang.Object
- io.jenetics.ext.rewriting.TreeMatcher<V>

```
public final class TreeMatcher<V>
extends Object
```
Implementation of a pattern based tree matcher. It allows you to iterate over all matches of a tree for a given pattern.
final TreePattern<String> pattern = TreePattern.compile("add($x,$y)"); final Tree<String, ?> tree = TreeNode.parse("add(1,add(2,3))"); final TreeMatcher<String> matcher = pattern.matcher(tree); matcher.results().forEach(r -> System.out.println(r.tree().toParenthesesString())); // Prints: // add(1,add(2,3)) // add(2,3)

Since:

5.0

Version:

5.0

See Also:

TreePattern.matcher(Tree)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`matches()`	Tests if the tree matches the pattern.
`TreePattern<V>`	`pattern()`	Return the underlying pattern of `this` matcher.
`Stream<TreeMatchResult<V>>`	`results()`	Return all matching sub-trees.
`Tree<V,?>`	`tree()`	Return the matching tree.

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

- Method Detail
  - pattern
```
public TreePattern<V> pattern()
```
    Return the underlying pattern of this matcher.
    
    Returns:
    
    the underlying tree pattern
  - tree
```
public Tree<V,?> tree()
```
    Return the matching tree.
    
    Returns:
    
    the matching tree
  - matches
```
public boolean matches()
```
    Tests if the tree matches the pattern.
    
    Returns:
    
    true if the tree matches against the pattern, false otherwise
    
    Throws:
    
    NullPointerException - if the given predicate is null
  - results
```
public Stream<TreeMatchResult<V>> results()
```
    Return all matching sub-trees.
    
    Returns:
    
    all matching sub-trees
    
    Throws:
    
    NullPointerException - if the given predicate is null