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better list examples

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This commit is contained in:
Jonathan Shook 2024-01-23 13:01:05 -06:00
parent 5bbb3f428a
commit 107245c712
1 changed files with 10 additions and 6 deletions
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16
virtdata-lib-basics/src/main/java/io/nosqlbench/virtdata/library/basics/shared/from_long/to_collection/ListSizedStepped.java
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@ -29,11 +29,11 @@ import java.util.function.LongToIntFunction;
/**
* Create a List from a long input based on a set of provided functions.
*
* <p>
* As a 'Sized' function, the first argument is a function which determines the size of the resulting list.
* Additional functions provided are used to generate the elements to add to the collection. If the size
* is larger than the number of provided functions, the last provided function is used repeatedly as needed.
*
* <p>
* As a 'Stepped' function, the input value is incremented before being used by each element function.
*/
@Categories({Category.collections})
@ -44,12 +44,16 @@ public class ListSizedStepped implements LongFunction<List<Object>> {
private final LongToIntFunction sizeFunc;
@Example({
"ListFunctions(NumberNameToString(),NumberNameToString())",
"Create a list of ['one','one']"
"ListSizedStepped(2,NumberNameToString(),NumberNameToString())",
"Create a list of elements like ['zero','one']"
})
@Example({
"ListSizedStepped(2,HashRange(1f,10f))",
"Create a list of elements like [3.8738558, 7.139979]"
})
public ListSizedStepped(Object sizeFunc, Object... funcs) {
if (sizeFunc instanceof Number) {
int size = ((Number)sizeFunc).intValue();
int size = ((Number) sizeFunc).intValue();
this.sizeFunc = s -> size;
} else {
this.sizeFunc = VirtDataConversions.adaptFunction(sizeFunc, LongToIntFunction.class);
@ -64,7 +68,7 @@ public class ListSizedStepped implements LongFunction<List<Object>> {
for (int i = 0; i < size; i++) {
int selector = Math.min(i, valueFuncs.size() - 1);
LongFunction<?> func = valueFuncs.get(selector);
list.add(func.apply(i+value));
list.add(func.apply(i + value));
}
return list;
}