org.echocat.jomon.runtime.iterators

Class BatchConvertingIterator<S,T>

java.lang.Object

org.echocat.jomon.runtime.iterators.BatchConvertingIterator<S,T>

Type Parameters:

T - type of result iteration

S - type of input iteration

All Implemented Interfaces:

java.lang.AutoCloseable, java.util.Iterator<T>, CloseableIterator<T>

public abstract class BatchConvertingIterator<S,T>
extends java.lang.Object
implements CloseableIterator<T>

Uses a given input iterator to fetch results once hasNext is called. Once it was called a batch of X given entries will be processed and return for the upcoming hasNext/next invocations'. As soon as there are no further entries in output iteration further will be request in case the input iterator still has further elements.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	BatchConvertingIterator(java.util.Iterator<S> input, int batchSize)

Method Summary

Methods

Modifier and Type	Method and Description
void	close()
protected abstract java.util.Iterator<T>	convert(java.util.Collection<S> input)
boolean	hasNext()
T	next()
void	remove()

Methods inherited from class java.lang.Object

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

Constructor Detail

BatchConvertingIterator

protected BatchConvertingIterator(@Nonnull
                       java.util.Iterator<S> input,
                       @Nonnegative
                       int batchSize)

Method Detail

convert

@Nonnull
protected abstract java.util.Iterator<T> convert(@Nonnull
                                    java.util.Collection<S> input)

hasNext

public boolean hasNext()

Specified by:

hasNext in interface java.util.Iterator<T>

next

@Nullable
public T next()

Specified by:

next in interface java.util.Iterator<T>

remove

public void remove()

Specified by:

remove in interface java.util.Iterator<T>

close

public void close()

Specified by:

close in interface java.lang.AutoCloseable

Specified by:

close in interface CloseableIterator<T>