com.google.common.io
Class Closeables

java.lang.Object
  com.google.common.io.Closeables

@Beta
public final class Closeables
extends Object

Utility methods for working with Closeable objects.

Since:

1.0

Author:

Michael Lancaster

Method Summary

static void	close(Closeable closeable, boolean swallowIOException) Closes a Closeable, with control over whether an IOException may be thrown.
static void	closeQuietly(Closeable closeable) Equivalent to calling close(closeable, true), but with no IOException in the signature.

Methods inherited from class java.lang.Object

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

Method Detail

close

public static void close(@Nullable
                         Closeable closeable,
                         boolean swallowIOException)
                  throws IOException

Closes a Closeable, with control over whether an IOException may be thrown. This is primarily useful in a finally block, where a thrown exception needs to be logged but not propagated (otherwise the original exception will be lost).

If swallowIOException is true then we never throw IOException but merely log it.

Example:

public void useStreamNicely() throws IOException {
 SomeStream stream = new SomeStream("foo");
 boolean threw = true;
 try {
   // Some code which does something with the Stream. May throw a
   // Throwable.
   threw = false; // No throwable thrown.
 } finally {
   // Close the stream.
   // If an exception occurs, only rethrow it if (threw==false).
   Closeables.close(stream, threw);
 }
 

Parameters:

closeable - the Closeable object to be closed, or null, in which case this method does nothing

swallowIOException - if true, don't propagate IO exceptions thrown by the close methods

Throws:

IOException - if swallowIOException is false and close throws an IOException.

closeQuietly

public static void closeQuietly(@Nullable
                                Closeable closeable)

Equivalent to calling close(closeable, true), but with no IOException in the signature.

Parameters:

closeable - the Closeable object to be closed, or null, in which case this method does nothing