benweidig

   Type of                                                                           Return
  Operation                         Stream Operations                                 Type
─────────────────────────────────────────────────────────────────────────────────────────────────────

                 ┌──────────────────────────────────────────────────────────────┐
   Source        │ Book   Book   Book   Book   Book   Book   Book   Book   Book │   List<Book>
                 └─────────────────────────────┬────────────────────────────────┘
                                               │
                                               v
                 ┌──────────────────────────────────────────────────────────────┐

benweidig

Java Time API / JSR310 Type Coercers

Date: 2020-10-16
Author: Ben Weidig

Summary

Add JSR310 / Java Time CoercionTuples to Tapestry.

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Either<Integer, String> result = doWork();

result.apply(errorCode -> log.error("Error {} occuring during work", errorCode),
             value -> log.info("Success: {}", value));

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import java.util.Optional;
import java.util.function.Consumer;
import java.util.function.Function;

public class Either<L, R> {

    public static <L, R> Either<L, R> left(L value) {
        return new Either<>(value, null);
    }

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interface FileLoader {
    Optional<String> loadContent() throws IOException;
}

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interface FileLoader {
    String loadContent() throws FileNotFoundException;
}

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try {
    // might throw IOException
    doWork();

    doMoreWorkRequireingCleanup();
}
catch (IOException e) {
    throw new RuntimeExcetpion(e)
}
finally {

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try {
    // might throw IllegalArgumentException
    doWork();

    // might throw ArithmeticException
    doMoreWork();
}
catch (IllegalArgumentExcetion e) {
    // handle exception
}

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try {
    doWork();
}
catch (Exception e) {
    // NO-OP
}

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try {
    doWork();
}
catch (NullPointerException e) {
    log.error("doWork() failed", e);
    throw e;
}