BreadthConceptHierarchyIterator

java.lang.Object
- org.jetbrains.mps.util.BreadthConceptHierarchyIterator

All Implemented Interfaces:

Iterable<SAbstractConcept>, Iterator<SAbstractConcept>
```
public class BreadthConceptHierarchyIterator
extends Object
implements Iterable<SAbstractConcept>, Iterator<SAbstractConcept>
```
Iterates hierarchy of concepts, breadth-first. Iterator doesn't support removals. Return values are not unique, e.g. if an interface is implemented by few concepts, it is reported several times. Wrap with UniqueIterator if necessary. Given ConceptA implements I1, I2 and ConceptB extends ConceptA implements I3, I4; Interface I3 extends I5; Interface I5 extends I1; and ConceptB as starting point, yields: { ConceptB, I3, I4 } - level 0 for ConceptB, { ConceptA, I1, I2 } - level 1 from ConceptA , { I5 } level 1 from I3, {I1} - level 2 from I5. Note, this class is similar to what used to be org.jetbrains.mps.openapi.language.SConceptUtil, except for explicit walk algorithm and OOP-friendly style.

Constructor Summary

Constructors
Constructor Description

BreadthConceptHierarchyIterator(SAbstractConcept start)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`hasNext()`
`Iterator<SAbstractConcept>`	`iterator()`
`SAbstractConcept`	`next()`
`void`	`remove()`

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

Methods inherited from interface java.lang.Iterable
forEach, spliterator

Methods inherited from interface java.util.Iterator
forEachRemaining

- Constructor Detail
  - BreadthConceptHierarchyIterator
```
public BreadthConceptHierarchyIterator(@NotNull
                                       SAbstractConcept start)
```
- Method Detail
  - iterator
```
@NotNull
public Iterator<SAbstractConcept> iterator()
```
    Specified by:
    
    iterator in interface Iterable<SAbstractConcept>
  - hasNext
```
public boolean hasNext()
```
    Specified by:
    
    hasNext in interface Iterator<SAbstractConcept>
  - next
```
public SAbstractConcept next()
```
    Specified by:
    
    next in interface Iterator<SAbstractConcept>
  - remove
```
public void remove()
```
    Specified by:
    
    remove in interface Iterator<SAbstractConcept>