UnmodifiableMapIterator (Apache Commons Collections 4.0 API)

java.lang.Object
- org.apache.commons.collections4.iterators.UnmodifiableMapIterator<K,V>

All Implemented Interfaces:

Iterator<K>, MapIterator<K,V>, Unmodifiable
```
public final class UnmodifiableMapIterator<K,V>
extends Object
implements MapIterator<K,V>, Unmodifiable
```
Decorates a map iterator such that it cannot be modified.
Attempts to modify it will result in an UnsupportedOperationException.

Since:

3.0

Version:

$Id: UnmodifiableMapIterator.html 972421 2015-11-14 20:00:04Z tn $

Method Summary

Methods
Modifier and Type	Method and Description
`K`	`getKey()` Gets the current key, which is the key returned by the last call to `next()`.
`V`	`getValue()` Gets the current value, which is the value associated with the last key returned by `next()`.
`boolean`	`hasNext()` Checks to see if there are more entries still to be iterated.
`K`	`next()` Gets the next key from the `Map`.
`void`	`remove()` Removes the last returned key from the underlying `Map` (optional operation).
`V`	`setValue(V value)` Sets the value associated with the current key (optional operation).
`static <K,V> MapIterator<K,V>`	`unmodifiableMapIterator(MapIterator<? extends K,? extends V> iterator)` Decorates the specified iterator such that it cannot be modified.

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

- Method Detail
  - unmodifiableMapIterator
```
public static <K,V> MapIterator<K,V> unmodifiableMapIterator(MapIterator<? extends K,? extends V> iterator)
```
    Decorates the specified iterator such that it cannot be modified.
    
    Type Parameters:
    K - the key type
    V - the value type
    Parameters:
    iterator - the iterator to decorate
    
    Returns:
    a new unmodifiable map iterator
    
    Throws:
    
    IllegalArgumentException - if the iterator is null
  - hasNext
```
public boolean hasNext()
```
    Description copied from interface: MapIterator
    
    Checks to see if there are more entries still to be iterated.
    
    Specified by:
    
    hasNext in interface Iterator<K>
    
    Specified by:
    
    hasNext in interface MapIterator<K,V>
    
    Returns:
    true if the iterator has more elements
  - next
```
public K next()
```
    Description copied from interface: MapIterator
    
    Gets the next key from the Map.
    
    Specified by:
    
    next in interface Iterator<K>
    
    Specified by:
    
    next in interface MapIterator<K,V>
    
    Returns:
    the next key in the iteration
  - getKey
```
public K getKey()
```
    Description copied from interface: MapIterator
    
    Gets the current key, which is the key returned by the last call to next().
    
    Specified by:
    
    getKey in interface MapIterator<K,V>
    
    Returns:
    the current key
  - getValue
```
public V getValue()
```
    Description copied from interface: MapIterator
    
    Gets the current value, which is the value associated with the last key returned by next().
    
    Specified by:
    
    getValue in interface MapIterator<K,V>
    
    Returns:
    the current value
  - setValue
```
public V setValue(V value)
```
    Description copied from interface: MapIterator
    
    Sets the value associated with the current key (optional operation).
    
    Specified by:
    
    setValue in interface MapIterator<K,V>
    
    Parameters:
    value - the new value
    
    Returns:
    the previous value
  - remove
```
public void remove()
```
    Description copied from interface: MapIterator
    
    Removes the last returned key from the underlying Map (optional operation).
    This method can be called once per call to next().
    
    Specified by:
    
    remove in interface Iterator<K>
    
    Specified by:
    
    remove in interface MapIterator<K,V>

Class UnmodifiableMapIterator<K,V>

Method Summary

Methods inherited from class java.lang.Object

Method Detail

unmodifiableMapIterator

hasNext

next

getKey

getValue

setValue

remove