diff options
Diffstat (limited to 'guava/src/com/google/common/hash/AbstractByteHasher.java')
-rw-r--r-- | guava/src/com/google/common/hash/AbstractByteHasher.java | 122 |
1 files changed, 0 insertions, 122 deletions
diff --git a/guava/src/com/google/common/hash/AbstractByteHasher.java b/guava/src/com/google/common/hash/AbstractByteHasher.java deleted file mode 100644 index 90210df..0000000 --- a/guava/src/com/google/common/hash/AbstractByteHasher.java +++ /dev/null @@ -1,122 +0,0 @@ -/* - * Copyright (C) 2012 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.hash; - -import static com.google.common.base.Preconditions.checkNotNull; -import static com.google.common.base.Preconditions.checkPositionIndexes; - -import com.google.common.primitives.Chars; -import com.google.common.primitives.Ints; -import com.google.common.primitives.Longs; -import com.google.common.primitives.Shorts; - -import java.nio.ByteBuffer; -import java.nio.ByteOrder; - -/** - * Abstract {@link Hasher} that handles converting primitives to bytes using a scratch {@code - * ByteBuffer} and streams all bytes to a sink to compute the hash. - * - * @author Colin Decker - */ -abstract class AbstractByteHasher extends AbstractHasher { - - private final ByteBuffer scratch = ByteBuffer.allocate(8).order(ByteOrder.LITTLE_ENDIAN); - - /** - * Updates this hasher with the given byte. - */ - protected abstract void update(byte b); - - /** - * Updates this hasher with the given bytes. - */ - protected void update(byte[] b) { - update(b, 0, b.length); - } - - /** - * Updates this hasher with {@code len} bytes starting at {@code off} in the given buffer. - */ - protected void update(byte[] b, int off, int len) { - for (int i = off; i < off + len; i++) { - update(b[i]); - } - } - - @Override - public Hasher putByte(byte b) { - update(b); - return this; - } - - @Override - public Hasher putBytes(byte[] bytes) { - checkNotNull(bytes); - update(bytes); - return this; - } - - @Override - public Hasher putBytes(byte[] bytes, int off, int len) { - checkPositionIndexes(off, off + len, bytes.length); - update(bytes, off, len); - return this; - } - - /** - * Updates the sink with the given number of bytes from the buffer. - */ - private Hasher update(int bytes) { - try { - update(scratch.array(), 0, bytes); - } finally { - scratch.clear(); - } - return this; - } - - @Override - public Hasher putShort(short s) { - scratch.putShort(s); - return update(Shorts.BYTES); - } - - @Override - public Hasher putInt(int i) { - scratch.putInt(i); - return update(Ints.BYTES); - } - - @Override - public Hasher putLong(long l) { - scratch.putLong(l); - return update(Longs.BYTES); - } - - @Override - public Hasher putChar(char c) { - scratch.putChar(c); - return update(Chars.BYTES); - } - - @Override - public <T> Hasher putObject(T instance, Funnel<? super T> funnel) { - funnel.funnel(instance, this); - return this; - } -} |