1 /* 2 * Copyright (C) 2011 The Guava Authors 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except 5 * in compliance with the License. You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software distributed under the License 10 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express 11 * or implied. See the License for the specific language governing permissions and limitations under 12 * the License. 13 */ 14 15 package com.google.common.hash; 16 17 import com.google.common.base.Charsets; 18 19 import java.nio.charset.Charset; 20 21 /** 22 * An abstract hasher, implementing {@link #putBoolean(boolean)}, {@link #putDouble(double)}, 23 * {@link #putFloat(float)}, {@link #putString(CharSequence)}, and 24 * {@link #putString(CharSequence, Charset)} as prescribed by {@link Hasher}. 25 * 26 * @author andreou@google.com (Dimitris Andreou) 27 */ 28 abstract class AbstractHasher implements Hasher { putBoolean(boolean b)29 @Override public final Hasher putBoolean(boolean b) { 30 return putByte(b ? (byte) 1 : (byte) 0); 31 } 32 putDouble(double d)33 @Override public final Hasher putDouble(double d) { 34 return putLong(Double.doubleToRawLongBits(d)); 35 } 36 putFloat(float f)37 @Override public final Hasher putFloat(float f) { 38 return putInt(Float.floatToRawIntBits(f)); 39 } 40 putString(CharSequence charSequence)41 @Override public Hasher putString(CharSequence charSequence) { 42 // TODO(user): Should we instead loop over the CharSequence and call #putChar? 43 return putString(charSequence, Charsets.UTF_16LE); 44 } 45 putString(CharSequence charSequence, Charset charset)46 @Override public Hasher putString(CharSequence charSequence, Charset charset) { 47 try { 48 return putBytes(charSequence.toString().getBytes(charset.name())); 49 } catch (java.io.UnsupportedEncodingException impossible) { 50 throw new AssertionError(impossible); 51 } 52 } 53 } 54