Update #0 - First Release

sources/main/java/com/google/common/io/Flushables.java

@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2007 The Guava Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.common.io;
+
+import java.io.Flushable;
+import java.io.IOException;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import com.google.common.annotations.Beta;
+
+/**
+ * Utility methods for working with {@link Flushable} objects.
+ *
+ * @author Michael Lancaster
+ * @since 1.0
+ */
+@Beta
+public final class Flushables {
+	private static final Logger logger = Logger.getLogger(Flushables.class.getName());
+
+	private Flushables() {
+	}
+
+	/**
+	 * Flush a {@link Flushable}, with control over whether an {@code IOException}
+	 * may be thrown.
+	 *
+	 * <p>
+	 * If {@code swallowIOException} is true, then we don't rethrow
+	 * {@code IOException}, but merely log it.
+	 *
+	 * @param flushable          the {@code Flushable} object to be flushed.
+	 * @param swallowIOException if true, don't propagate IO exceptions thrown by
+	 *                           the {@code flush} method
+	 * @throws IOException if {@code swallowIOException} is false and
+	 *                     {@link Flushable#flush} throws an {@code IOException}.
+	 * @see Closeables#close
+	 */
+	public static void flush(Flushable flushable, boolean swallowIOException) throws IOException {
+		try {
+			flushable.flush();
+		} catch (IOException e) {
+			if (swallowIOException) {
+				logger.log(Level.WARNING, "IOException thrown while flushing Flushable.", e);
+			} else {
+				throw e;
+			}
+		}
+	}
+
+	/**
+	 * Equivalent to calling {@code flush(flushable, true)}, but with no
+	 * {@code IOException} in the signature.
+	 *
+	 * @param flushable the {@code Flushable} object to be flushed.
+	 */
+	public static void flushQuietly(Flushable flushable) {
+		try {
+			flush(flushable, true);
+		} catch (IOException e) {
+			logger.log(Level.SEVERE, "IOException should not have been thrown.", e);
+		}
+	}
+}