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• DataUnit.java

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eu.ciechanowiec.sling.rocket.unit.DataUnit Maven / Gradle / Ivy

package eu.ciechanowiec.sling.rocket.unit;

import java.util.function.UnaryOperator;

/**
 * Units of digital information.
 *
 * 
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Data Unit Sizes
Constant
Data size
Power of 2
Size in Bytes
{@link DataUnit#BYTES}
1B
2^0
1
{@link DataUnit#KILOBYTES}
1KB
2^10
1,024
{@link DataUnit#MEGABYTES}
1MB
2^20
1,048,576
{@link DataUnit#GIGABYTES}
1GB
2^30
1,073,741,824
{@link DataUnit#TERABYTES}
1TB
2^40
1,099,511,627,776
 */
public enum DataUnit {

    /**
     * Bytes (B).
     */
    BYTES(UnaryOperator.identity()),

    /**
     * Kilobytes (KB).
     */
    KILOBYTES(kilobytes -> Math.multiplyExact(kilobytes, DataUnitMultiplications.BYTES_PER_KB)),

    /**
     * Megabytes (MB).
     */
    MEGABYTES(megabytes -> Math.multiplyExact(megabytes, DataUnitMultiplications.BYTES_PER_MB)),

    /**
     * Gigabytes (GB).
     */
    GIGABYTES(gigabytes -> Math.multiplyExact(gigabytes, DataUnitMultiplications.BYTES_PER_GB)),

    /**
     * Terabytes (TB).
     */
    TERABYTES(terabytes -> Math.multiplyExact(terabytes, DataUnitMultiplications.BYTES_PER_TB));

    private final UnaryOperator toBytes;

    DataUnit(UnaryOperator toBytes) {
        this.toBytes = toBytes;
    }

    long toBytes(long size) {
        return toBytes.apply(size);
    }
}