Simple List Object Array Matcher with usage

ObjectArrayMatcher.java

/**
 * An expected call to my matcher
 */
this.context.checking(new Expectations() {
	{
		one(someMockedService).save(with(args), with(def), with(thisObjectArray(batch)));
	}
});
this.seviceUnderTest.source(args);
       
/**
 * Static method for use in my unit test
 */
public static Matcher<List<Object[]>> thisObjectArray(final List<Object[]> batch) {
       return new ObjectArrayMatcher(batch);
}

/**
 * Object Array Matcher
 */
private static class ObjectArrayMatcher extends BaseMatcher<List<Object[]>> {
	private final List<Object[]> batch;
	public ObjectArrayMatcher(final List<Object[]> batch) {
		this.batch = batch;
	}
	@Override
	@SuppressWarnings("unchecked")
	public boolean matches(final Object arg) {
		if (!(arg instanceof List)) {
			return false;
		}
		final List<Object[]> converted = (List<Object[]>) arg;
		if (converted.size() != batch.size()) {
			return false;
		}
		for (int i = 0; i < converted.size(); i++) {
			assertThat(converted.get(i), is(batch.get(i)));
		}
		return true;
	}

	@Override
	public void describeTo(final Description arg) {
		//
	}
}