Package gnu.trove.impl.hash
Class THashPrimitiveIterator
- java.lang.Object
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- gnu.trove.impl.hash.THashPrimitiveIterator
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- All Implemented Interfaces:
TIterator
,TPrimitiveIterator
public abstract class THashPrimitiveIterator extends java.lang.Object implements TPrimitiveIterator
Implements all iterator functions for the hashed object set. Subclasses may override objectAtIndex to vary the object returned by calls to next() (e.g. for values, and Map.Entry objects).
Note that iteration is fastest if you forego the calls to hasNext in favor of checking the size of the structure yourself and then call next() that many times:
Iterator i = collection.iterator(); for (int size = collection.size(); size-- > 0;) { Object o = i.next(); }
You may, of course, use the hasNext(), next() idiom too if you aren't in a performance critical spot.
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Field Summary
Fields Modifier and Type Field Description protected int
_expectedSize
the number of elements this iterator believes are in the data structure it accesses.protected TPrimitiveHash
_hash
the data structure this iterator traversesprotected int
_index
the index used for iteration.
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Constructor Summary
Constructors Constructor Description THashPrimitiveIterator(TPrimitiveHash hash)
Creates a TPrimitiveIterator for the specified collection.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
hasNext()
Returns true if the iterator can be advanced past its current location.protected void
moveToNextIndex()
Sets the internal index so that the `next' object can be returned.protected int
nextIndex()
Returns the index of the next value in the data structure or a negative value if the iterator is exhausted.void
remove()
Removes the last entry returned by the iterator.
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Field Detail
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_hash
protected final TPrimitiveHash _hash
the data structure this iterator traverses
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_expectedSize
protected int _expectedSize
the number of elements this iterator believes are in the data structure it accesses.
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_index
protected int _index
the index used for iteration.
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Constructor Detail
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THashPrimitiveIterator
public THashPrimitiveIterator(TPrimitiveHash hash)
Creates a TPrimitiveIterator for the specified collection.- Parameters:
hash
- the TPrimitiveHash we want to iterate over.
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Method Detail
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nextIndex
protected final int nextIndex()
Returns the index of the next value in the data structure or a negative value if the iterator is exhausted.- Returns:
- an
int
value - Throws:
java.util.ConcurrentModificationException
- if the underlying collection's size has been modified since the iterator was created.
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hasNext
public boolean hasNext()
Returns true if the iterator can be advanced past its current location.- Specified by:
hasNext
in interfaceTIterator
- Specified by:
hasNext
in interfaceTPrimitiveIterator
- Returns:
- a
boolean
value
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remove
public void remove()
Removes the last entry returned by the iterator. Invoking this method more than once for a single entry will leave the underlying data structure in a confused state.- Specified by:
remove
in interfaceTIterator
- Specified by:
remove
in interfaceTPrimitiveIterator
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moveToNextIndex
protected final void moveToNextIndex()
Sets the internal index so that the `next' object can be returned.
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