org.apfloat.spi

Class DataStorage.Iterator

java.lang.Object

org.apfloat.spi.DataStorage.Iterator

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

DataStorage.AbstractIterator

Enclosing class:

DataStorage

public abstract static class DataStorage.Iterator
extends Object
implements Serializable

Iterator for iterating through elements of the data storage.

See Also:

Serialized Form

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	Iterator() Default constructor.

Method Summary

Modifier and Type	Method and Description
void	close() Closes the iterator.
<T> T	get(Class<T> type) Gets the current element as a the specified element type.
double	getDouble() Gets the current element as a double.
float	getFloat() Gets the current element as a float.
int	getInt() Gets the current element as an int.
long	getLong() Gets the current element as a long.
boolean	hasNext() Check if next() can be called without going past the end of the sequence.
void	next() Advances the position in the stream by one element.
<T> void	set(Class<T> type, T value) Sets the current element as the specified element type.
void	setDouble(double value) Sets the current element as a double.
void	setFloat(float value) Sets the current element as a float.
void	setInt(int value) Sets the current element as an int.
void	setLong(long value) Sets the current element as a long.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Iterator

protected Iterator()

Default constructor. Can be used e.g. for simple anonymous subclasses.

Method Detail

hasNext

public boolean hasNext()

Check if next() can be called without going past the end of the sequence.

That is, if next() can be called without deliberately causing an exception. Note: It is important that the iterator is iterated past the last element; that is next() is called startPosition - endPosition times. The get() or set() methods should not be called for the last element.

The default implementation always returns false.

Returns:

true if next() can be called, otherwise false.

next

public void next()
          throws IllegalStateException,
                 ApfloatRuntimeException

Advances the position in the stream by one element.

Note: It is important that the iterator is iterated past the last element; that is next() is called startPosition - endPosition times. The get() or set() methods should not be called for the last element.

The default implementation always throws IllegalStateException.

Throws:

IllegalStateException - If the iterator has been iterated to the end already.

ApfloatRuntimeException

getInt

public int getInt()
           throws UnsupportedOperationException,
                  IllegalStateException,
                  ApfloatRuntimeException

Gets the current element as an int.

The default implementation calls get(Class) with argument Integer.TYPE.

Returns:

The current element as an int.

Throws:

UnsupportedOperationException - If the element type of the data storage can't be converted to an int.

IllegalStateException - If the iterator is at the end.

ApfloatRuntimeException

getLong

public long getLong()
             throws UnsupportedOperationException,
                    IllegalStateException,
                    ApfloatRuntimeException

Gets the current element as a long.

The default implementation calls get(Class) with argument Long.TYPE.

Returns:

The current element as a long.

Throws:

UnsupportedOperationException - If the element type of the data storage can't be converted to a long.

IllegalStateException - If the iterator is at the end.

ApfloatRuntimeException

getFloat

public float getFloat()
               throws UnsupportedOperationException,
                      IllegalStateException,
                      ApfloatRuntimeException

Gets the current element as a float.

The default implementation calls get(Class) with argument Float.TYPE.

Returns:

The current element as a float.

Throws:

UnsupportedOperationException - If the element type of the data storage can't be converted to a float.

IllegalStateException - If the iterator is at the end.

ApfloatRuntimeException

getDouble

public double getDouble()
                 throws UnsupportedOperationException,
                        IllegalStateException,
                        ApfloatRuntimeException

Gets the current element as a double.

The default implementation calls get(Class) with argument Double.TYPE.

Returns:

The current element as a double.

Throws:

UnsupportedOperationException - If the element type of the data storage can't be converted to a double.

IllegalStateException - If the iterator is at the end.

ApfloatRuntimeException

setInt

public void setInt(int value)
            throws UnsupportedOperationException,
                   IllegalStateException,
                   ApfloatRuntimeException

Sets the current element as an int.

The default implementation calls set(Class,Object) with first argument Integer.TYPE.

Parameters:

value - The value to be set to the current element as an int.

Throws:

UnsupportedOperationException - If the element type of the data storage can't be converted to an int.

IllegalStateException - If the iterator is at the end.

ApfloatRuntimeException

setLong

public void setLong(long value)
             throws UnsupportedOperationException,
                    IllegalStateException,
                    ApfloatRuntimeException

Sets the current element as a long.

The default implementation calls set(Class,Object) with first argument Long.TYPE.

Parameters:

value - The value to be set to the current element as a long.

Throws:

UnsupportedOperationException - If the element type of the data storage can't be converted to a long.

IllegalStateException - If the iterator is at the end.

ApfloatRuntimeException

setFloat

public void setFloat(float value)
              throws UnsupportedOperationException,
                     IllegalStateException,
                     ApfloatRuntimeException

Sets the current element as a float.

The default implementation calls set(Class,Object) with first argument Float.TYPE.

Parameters:

value - The value to be set to the current element as a float.

Throws:

UnsupportedOperationException - If the element type of the data storage can't be converted to a float.

IllegalStateException - If the iterator is at the end.

ApfloatRuntimeException

setDouble

public void setDouble(double value)
               throws UnsupportedOperationException,
                      IllegalStateException,
                      ApfloatRuntimeException

Sets the current element as a double.

The default implementation calls set(Class,Object) with first argument Double.TYPE.

Parameters:

value - The value to be set to the current element as a double.

Throws:

UnsupportedOperationException - If the element type of the data storage can't be converted to a double.

IllegalStateException - If the iterator is at the end.

ApfloatRuntimeException

get

public <T> T get(Class<T> type)
          throws UnsupportedOperationException,
                 IllegalStateException,
                 ApfloatRuntimeException

Gets the current element as a the specified element type.

The default implementation always throws UnsupportedOperationException.

Type Parameters:

T - The type of the element.

Parameters:

type - The type of the element.

Returns:

The current element as the specified type.

Throws:

UnsupportedOperationException - If the element type of the data storage can't be converted to the specified type.

IllegalStateException - If the iterator is at the end.

ApfloatRuntimeException

Since:

1.7.0

set

public <T> void set(Class<T> type,
                    T value)
             throws UnsupportedOperationException,
                    IllegalArgumentException,
                    IllegalStateException,
                    ApfloatRuntimeException

Sets the current element as the specified element type.

The default implementation always throws UnsupportedOperationException.

Type Parameters:

T - The type of the element.

Parameters:

type - The type of the element.

value - The value to be set to the current element as the specified type.

Throws:

UnsupportedOperationException - If the element type of the data storage can't be converted to the specified type.

IllegalArgumentException - If the value is not of the specified type.

IllegalStateException - If the iterator is at the end.

ApfloatRuntimeException

Since:

1.7.0

close

public void close()
           throws ApfloatRuntimeException

Closes the iterator. This needs to be called only if the iterator is not iterated to the end.

Throws:

ApfloatRuntimeException