io.virtdata.libbasics.shared.from_long.to_collection.HashedRangeToLongList Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of virtdata-lib-realer Show documentation

With inspiration from other libraries

There is a newer version: 2.12.15

package io.virtdata.libbasics.shared.from_long.to_collection;

import io.virtdata.annotations.Categories;
import io.virtdata.annotations.Category;
import io.virtdata.annotations.ThreadSafeMapper;
import io.virtdata.libbasics.shared.from_long.to_long.HashRange;

import java.util.ArrayList;
import java.util.List;
import java.util.function.LongFunction;

/**
 * Create a list of longs.
 */
@ThreadSafeMapper
@Categories({Category.collections})
public class HashedRangeToLongList implements LongFunction> {

    private final HashRange valueRange;
    private final HashRange sizeRange;

    public HashedRangeToLongList(int minVal, int maxVal, int minSize, int maxSize) {
        if (minSize>=maxSize || minSize>=maxSize) {
            throw new RuntimeException("HashedRangeToLongList must have minval, maxval, minsize, maxsize, where min apply(long value) {
        long listSize = sizeRange.applyAsLong(value);
        ArrayList longList = new ArrayList<>();
        for (int i = 0; i < listSize; i++) {
            longList.add(valueRange.applyAsLong(value+i));
        }
        return longList;
    }
}