Some common iterators for Java

Overview

This is a collection of companion Iterators for some commonly useful Iterable implementations for the following use cases:

• Iterating over sparse arrays
• Iterating over other objects

This library is an extensions of the corresponding library for Java, that contains Iterators for Android specific data structures.

This library is hosted in the Maven Central Repository. You can use it with the following coordinates:

compile 'net.markenwerk:android-commons-iterators:3.1.0'

Consult the usage description and Javadoc for further information.

Usage

Iterating over sparse arrays

This library provides the following Iterators that take existing sparse arrays and yield all elements of the given array wrapped in an Entry:

• LongSparseArrayIterator
• SparseArrayIterator
• SparseBooleanArrayIterator
• SparseIntegerArrayIterator
• SparseLongArrayIterator

SparseArray<Foo> sparseArray = ...

// yields every foo from sparseArray
Iterator<Entry<Integer, Foo>> arraytIterator = new SparseArrayIterator<>(sparseArray);

Iterating over other objects

This library provides the generic PairIterator that takes and existing Pair and yields both contained values.

Pair<Foo, Foo> pair = ...

// yields both foos from pair
Iterator<Foo> pairIterator = new PairIterator<>(pair);