001 /*
002 * Copyright (C) 2011 The Guava Authors
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
005 * in compliance with the License. You may obtain a copy of the License at
006 *
007 * http://www.apache.org/licenses/LICENSE-2.0
008 *
009 * Unless required by applicable law or agreed to in writing, software distributed under the License
010 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
011 * or implied. See the License for the specific language governing permissions and limitations under
012 * the License.
013 */
014
015 package com.google.common.hash;
016
017 import com.google.common.annotations.Beta;
018
019 /**
020 * Funnels for common types. All implementations are serializable.
021 *
022 * @author Dimitris Andreou
023 * @since 11.0
024 */
025 @Beta
026 public final class Funnels {
027 private Funnels() {}
028
029 /**
030 * Returns a funnel that extracts the bytes from a {@code byte} array.
031 */
032 public static Funnel<byte[]> byteArrayFunnel() {
033 return ByteArrayFunnel.INSTANCE;
034 }
035
036 private enum ByteArrayFunnel implements Funnel<byte[]> {
037 INSTANCE;
038
039 public void funnel(byte[] from, Sink into) {
040 into.putBytes(from);
041 }
042
043 @Override public String toString() {
044 return "Funnels.byteArrayFunnel()";
045 }
046 }
047
048 /**
049 * Returns a funnel that extracts the characters from a {@code CharSequence}.
050 */
051 public static Funnel<CharSequence> stringFunnel() {
052 return StringFunnel.INSTANCE;
053 }
054
055 private enum StringFunnel implements Funnel<CharSequence> {
056 INSTANCE;
057
058 public void funnel(CharSequence from, Sink into) {
059 into.putString(from);
060 }
061
062 @Override public String toString() {
063 return "Funnels.stringFunnel()";
064 }
065 }
066 }