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Java example source code file (AbstractHasher.java)

This example Java source code file (AbstractHasher.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

abstracthasher, canignorereturnvalue, charset, hasher, override

The AbstractHasher.java Java example source code

/*
 * 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.errorprone.annotations.CanIgnoreReturnValue;

import java.nio.charset.Charset;

/**
 * An abstract hasher, implementing {@link #putBoolean(boolean)}, {@link #putDouble(double)},
 * {@link #putFloat(float)}, {@link #putUnencodedChars(CharSequence)}, and
 * {@link #putString(CharSequence, Charset)} as prescribed by {@link Hasher}.
 *
 * @author Dimitris Andreou
 */
@CanIgnoreReturnValue
abstract class AbstractHasher implements Hasher {
  @Override
  public final Hasher putBoolean(boolean b) {
    return putByte(b ? (byte) 1 : (byte) 0);
  }

  @Override
  public final Hasher putDouble(double d) {
    return putLong(Double.doubleToRawLongBits(d));
  }

  @Override
  public final Hasher putFloat(float f) {
    return putInt(Float.floatToRawIntBits(f));
  }

  @Override
  public Hasher putUnencodedChars(CharSequence charSequence) {
    for (int i = 0, len = charSequence.length(); i < len; i++) {
      putChar(charSequence.charAt(i));
    }
    return this;
  }

  @Override
  public Hasher putString(CharSequence charSequence, Charset charset) {
    return putBytes(charSequence.toString().getBytes(charset));
  }
}

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