io.virtdata.libbasics.shared.from_long.to_collection.HashedRangeToLongList Maven / Gradle / Ivy
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With inspiration from other libraries
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;
}
}