gradle-master/subprojects/hashing/src/main/java/org/gradle/internal/hash/PrimitiveHasher.java
/*
 * Copyright 2017 the original author or 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 org.gradle.internal.hash;

/**
 * Hasher abstraction that can be fed different kinds of primitives that it then forwards directly to the hash function.
 * Inspired by the Google Guava project – https://github.com/google/guava.
 */
public interface PrimitiveHasher {
    /**
     * Feed a bunch of bytes into the hasher.
     */
    void putBytes(byte[] bytes);

    /**
     * Feed a given number of bytes into the hasher from the given offset.
     */
    void putBytes(byte[] bytes, int off, int len);

    /**
     * Feed a single byte into the hasher.
     */
    void putByte(byte value);

    /**
     * Feed an integer byte into the hasher.
     */
    void putInt(int value);

    /**
     * Feed a long value byte into the hasher.
     */
    void putLong(long value);

    /**
     * Feed a double value into the hasher.
     */
    void putDouble(double value);

    /**
     * Feed a boolean value into the hasher.
     */
    void putBoolean(boolean value);

    /**
     * Feed a string into the hasher.
     */
    void putString(CharSequence value);

    /**
     * Feed a hash code into the hasher.
     */
    void putHash(HashCode hashCode);

    /**
     * Returns the combined hash.
     */
    HashCode hash();
}
