com.koloboke.collect.map

Interface DoubleDoubleCursor

All Superinterfaces:

Cursor

public interface DoubleDoubleCursor
extends Cursor

A mutable pointer to the entry in an iteration of entries with double keys and double values.

Basic DoubleDoubleCursor usage idiom is:

 for (DoubleDoubleCursor cur = map.cursor(); cur.moveNext();) {
     // Work with cur.key() and cur.value()
     // Call cur.remove() to remove the current entry
 }

See the comparison of iteration ways in the library.

DoubleDoubleCursors of immutable maps don't support setValue(double) operation. More about mutability profiles.

See Also:

DoubleDoubleMap.cursor()

Method Summary

Modifier and Type	Method and Description
void	forEachForward(DoubleDoubleConsumer action) Performs the given action for each entry of the iteration after the cursor in forward direction until all entries have been processed or the action throws an exception.
double	key() Returns the key of the entry to which the cursor currently points.
void	setValue(double value) Replaces the value of the entry to which the cursor currently points (optional operation).
double	value() Returns the value of the entry to which the cursor currently points.

Methods inherited from interface com.koloboke.collect.Cursor

moveNext, remove

Method Detail

forEachForward

void forEachForward(@Nonnull
                    DoubleDoubleConsumer action)

Performs the given action for each entry of the iteration after the cursor in forward direction until all entries have been processed or the action throws an exception. Exceptions thrown by the action are relayed to the caller. cur.forEachForward(action) is exact equivalent of

 
 while (cur.moveNext())
     action.accept(cur.key(), cur.value());

Parameters:

action - the action to be performed for each entry

key

double key()

Returns the key of the entry to which the cursor currently points.

Throws IllegalStateException, if the cursor isn't pointing to any entry: if it is in front of the first entry, after the last, or the current entry has been removed using Cursor.remove() operation.

Returns:

the key of the entry to which the cursor currently points

Throws:

IllegalStateException - if this cursor is initially in front of the first entry and Cursor.moveNext() hasn't been called yet, or the previous call of moveNext returned false, or remove() has been performed after the previous cursor movement

value

double value()

Returns the value of the entry to which the cursor currently points.

Throws IllegalStateException, if the cursor isn't pointing to any entry: if it is in front of the first entry, after the last, or the current entry has been removed using Cursor.remove() operation.

Returns:

the value of the entry to which the cursor currently points

Throws:

IllegalStateException - if this cursor is initially in front of the first entry and Cursor.moveNext() hasn't been called yet, or the previous call of moveNext returned false, or remove() has been performed after the previous cursor movement

setValue

void setValue(double value)

Replaces the value of the entry to which the cursor currently points (optional operation).

Throws IllegalStateException if the cursor isn't pointing to any entry: if it is in front of the first entry, after the last, or the current entry has been removed using Cursor.remove() operation.

Parameters:

value - new value to be stored in the entry to which the cursor currently points

Throws:

UnsupportedOperationException - if the setValue operation is not supported by this cursor

IllegalArgumentException - if some property this value prevents it from being stored in the entries of the iteration

IllegalStateException - if this cursor is initially in front of the first entry and Cursor.moveNext() hasn't been called yet, or the previous call of moveNext returned false, or remove() has been performed after the previous cursor movement