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- //package org.acmsl.pocs.lambdafor;
-
- import java.util.ArrayList;
- import java.util.Collection;
- import java.util.List;
- import java.util.function.Function;
- import java.util.stream.Collectors;
-
- public class ControlFlow
- {
- public <C extends Collection<I>, I, R> Collection<R> forloop( final C items, final Function<I, R> lambda)
- {
- return functionalForLoop(items, lambda);
- }
-
- public <C extends Collection<I>, I, R> Collection<R> functionalForLoop( final C items, final Function<I, R> lambda)
- {
- return items.stream().map(lambda::apply).collect(Collectors.toList());
- }
-
-
- public Collection iterativeForloop( final Collection items, final Function lambda)
- {
- final List<Object> result = new ArrayList<>();
-
- for (final Object item: items)
- {
- result.add(lambda.<Object>apply(item));
- }
-
- return result;
- }
-
- public <C extends Collection<I>, I, R> Collection<R> externallyDrivenForloop(
- final ControlFlowDriver driver, final C items, final Function<I, R> lambda)
- {
- final List<R> result = new ArrayList<>(items.size());
-
- final List<I> list = new ArrayList<>(items);
-
- int position = -1;
-
- while (true)
- {
- ControlFlowCommand command = driver.waitForCommand();
-
- switch (command)
- {
- case NEXT:
- position++;
- break;
- case PREVIOUS:
- position++;
- break;
- case RELOAD:
- break;
- default:
- break;
- }
-
- if (position < 0)
- {
- position = 0;
- }
- else if (position > list.size() - 1)
- {
- break;
- }
-
- result.set(position, lambda.apply(list.get(position)));
- }
-
- return result;
- }
- }
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