Class EmptyMapIterator<K,V> 
java.lang.Object
org.apache.commons.collections4.iterators.AbstractEmptyMapIterator<K,V>
 
org.apache.commons.collections4.iterators.EmptyMapIterator<K,V> 
- Type Parameters:
- K- the type of keys
- V- the type of mapped values
- All Implemented Interfaces:
- Iterator<K>,- MapIterator<K,,- V> - ResettableIterator<K>
public class EmptyMapIterator<K,V> 
extends AbstractEmptyMapIterator<K,V>
implements MapIterator<K,V>  
Provides an implementation of an empty map iterator.
- Since:
- 3.1
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Field SummaryFields
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Constructor SummaryConstructors
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Method SummaryModifier and TypeMethodDescriptionvoidDeprecated.Will be removed in 5.0 without replacement.static <K,V> MapIterator <K, V> Gets a typed instance of the iterator.booleanhasNext()Always returns false, this iterator contains no elements.booleanAlways returns false, this iterator contains no elements.next()Always throws IllegalStateException, this iterator contains no elements.intAlways returns 0, this iterator contains no elements.previous()Always throws IllegalStateException, this iterator contains no elements.intAlways returns -1, this iterator contains no elements.voidremove()Always throws IllegalStateException, this iterator contains no elements.voidreset()Resets the iterator back to the position at which the iterator was created.voidAlways throws IllegalStateException, this iterator contains no elements.Methods inherited from class org.apache.commons.collections4.iterators.AbstractEmptyMapIteratorgetKey, getValue, setValueMethods inherited from class java.lang.Objectclone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitMethods inherited from interface java.util.IteratorforEachRemaining
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Field Details- 
INSTANCE
 
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Constructor Details- 
EmptyMapIteratorprotected EmptyMapIterator()Constructs a new instance.
 
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Method Details- 
emptyMapIteratorGets a typed instance of the iterator.- Type Parameters:
- K- the key type
- V- the value type
- Returns:
- MapIterator<K, V>
 
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addDeprecated.Will be removed in 5.0 without replacement.Always throws UnsupportedOperationException.- Parameters:
- ignored- ignore.
- Throws:
- UnsupportedOperationException- Always thrown.
 
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hasNext
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hasPreviouspublic boolean hasPrevious()Always returns false, this iterator contains no elements.- Returns:
- Always false.
 
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nextAlways throws IllegalStateException, this iterator contains no elements.- Specified by:
- nextin interface- Iterator<E>
- Returns:
- Always throws IllegalStateException.
- Throws:
- IllegalStateException- Always thrown.
 
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nextIndexpublic int nextIndex()Always returns 0, this iterator contains no elements.- Returns:
- Always returns 0.
 
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previousAlways throws IllegalStateException, this iterator contains no elements.- Returns:
- Always throws IllegalStateException.
- Throws:
- IllegalStateException- Always thrown.
 
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previousIndexpublic int previousIndex()Always returns -1, this iterator contains no elements.- Returns:
- Always returns -1.
 
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removepublic void remove()Always throws IllegalStateException, this iterator contains no elements.- Specified by:
- removein interface- Iterator<E>
- Throws:
- IllegalStateException- Always thrown.
 
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resetpublic void reset()Description copied from interface:ResettableIteratorResets the iterator back to the position at which the iterator was created.- Specified by:
- resetin interface- ResettableIterator<E>
 
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setAlways throws IllegalStateException, this iterator contains no elements.- Parameters:
- ignored- ignored.
- Throws:
- IllegalStateException- Always thrown.
 
 
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