com.google.common.hash.AbstractHasher Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
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/*
* Copyright (C) 2011 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 com.google.common.base.Preconditions;
import com.google.errorprone.annotations.CanIgnoreReturnValue;
import java.nio.ByteBuffer;
import java.nio.charset.Charset;
import org.checkerframework.checker.nullness.qual.Nullable;
/**
* An abstract implementation of {@link Hasher}, which only requires subtypes to implement {@link
* #putByte}. Subtypes may provide more efficient implementations, however.
*
* @author Dimitris Andreou
*/
@ElementTypesAreNonnullByDefault
abstract class AbstractHasher implements Hasher {
@Override
@CanIgnoreReturnValue
public final Hasher putBoolean(boolean b) {
return putByte(b ? (byte) 1 : (byte) 0);
}
@Override
@CanIgnoreReturnValue
public final Hasher putDouble(double d) {
return putLong(Double.doubleToRawLongBits(d));
}
@Override
@CanIgnoreReturnValue
public final Hasher putFloat(float f) {
return putInt(Float.floatToRawIntBits(f));
}
@Override
@CanIgnoreReturnValue
public Hasher putUnencodedChars(CharSequence charSequence) {
for (int i = 0, len = charSequence.length(); i < len; i++) {
putChar(charSequence.charAt(i));
}
return this;
}
@Override
@CanIgnoreReturnValue
public Hasher putString(CharSequence charSequence, Charset charset) {
return putBytes(charSequence.toString().getBytes(charset));
}
@Override
@CanIgnoreReturnValue
public Hasher putBytes(byte[] bytes) {
return putBytes(bytes, 0, bytes.length);
}
@Override
@CanIgnoreReturnValue
public Hasher putBytes(byte[] bytes, int off, int len) {
Preconditions.checkPositionIndexes(off, off + len, bytes.length);
for (int i = 0; i < len; i++) {
putByte(bytes[off + i]);
}
return this;
}
@Override
@CanIgnoreReturnValue
public Hasher putBytes(ByteBuffer b) {
if (b.hasArray()) {
putBytes(b.array(), b.arrayOffset() + b.position(), b.remaining());
Java8Compatibility.position(b, b.limit());
} else {
for (int remaining = b.remaining(); remaining > 0; remaining--) {
putByte(b.get());
}
}
return this;
}
@Override
@CanIgnoreReturnValue
public Hasher putShort(short s) {
putByte((byte) s);
putByte((byte) (s >>> 8));
return this;
}
@Override
@CanIgnoreReturnValue
public Hasher putInt(int i) {
putByte((byte) i);
putByte((byte) (i >>> 8));
putByte((byte) (i >>> 16));
putByte((byte) (i >>> 24));
return this;
}
@Override
@CanIgnoreReturnValue
public Hasher putLong(long l) {
for (int i = 0; i < 64; i += 8) {
putByte((byte) (l >>> i));
}
return this;
}
@Override
@CanIgnoreReturnValue
public Hasher putChar(char c) {
putByte((byte) c);
putByte((byte) (c >>> 8));
return this;
}
@Override
@CanIgnoreReturnValue
public Hasher putObject(
@ParametricNullness T instance, Funnel super T> funnel) {
funnel.funnel(instance, this);
return this;
}
}