Package com.apple.foundationdb.record.lucene.codec

Class LazyOpener<T>

java.lang.Object

com.apple.foundationdb.record.lucene.codec.LazyOpener<T>

Type Parameters:

T - the type of object that the opener returns

public class LazyOpener<T>
extends Object

Class to lazily "open" something that may throw an IOException when opening.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	LazyOpener.Opener<T>	A function that returns an object, but may throw an IOException.

Method Summary

Modifier and Type	Method	Description
T	get()	Get the object returned by the opener.
T	getUnchecked()	Get the object returned by the opener, throwing UncheckedIOException if the LazyOpener.Opener.open() method threw IOException.
static <U> LazyOpener<U>	supply(LazyOpener.Opener<U> opener)	Create a new LazyOpener for the given LazyOpener.Opener.

Methods inherited from class java.lang.Object

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

Method Details

supply

public static <U> LazyOpener<U> supply(LazyOpener.Opener<U> opener)

Create a new LazyOpener for the given LazyOpener.Opener.

The opener will be called at most once; see Suppliers.memoize(Supplier).

Type Parameters:

U - the return type of the opener

Parameters:

opener - a function to "open" a resource

Returns:

a new lazily opened object

get

public T get()
      throws IOException

Get the object returned by the opener.

Returns:

the object returned by the opener

Throws:

IOException - if calling LazyOpener.Opener.open() threw an IOException

getUnchecked

public T getUnchecked()

Get the object returned by the opener, throwing UncheckedIOException if the LazyOpener.Opener.open() method threw IOException.

Returns:

the object returned by the opener