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finished lab5

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This commit is contained in:
Yadunand Prem 2022-10-06 10:33:11 +08:00
parent a99c9cefd2
commit 530ef6b71a
2 changed files with 48 additions and 37 deletions
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64
Lab5/Lab5.java
View File

@ -25,14 +25,12 @@ class Lab5 {
};
Immutator<Actually<Map<String, Map<String, String>>>, Map<String, Map<String, Map<String, String>>>> getModule = new Immutator<>() {
@Override
public Actually<Map<String, Map<String, String>>> invoke(Map<String, Map<String, Map<String, String>>> param) {
return Actually.ok(param.get(module));
}
};
Immutator<Actually<Map<String, String>>, Map<String, Map<String, String>>> getStudent = new Immutator<>() {
@Override
public Actually<Map<String, String>> invoke(Map<String, Map<String, String>> param) {
return Actually.ok(param.get(student));
@ -40,46 +38,48 @@ class Lab5 {
};
Immutator<Actually<String>, Map<String, String>> getAssessment = new Immutator<>() {
@Override
public Actually<String> invoke(Map<String, String> param) {
return Actually.ok(param.get(assessment));
return Actually.ok(param.get(assessment).toString());
}
};
return cDb.init().next(getModule).next(getStudent).next(getAssessment).except(cNoEntry);
return cDb
.init()
.next(getModule)
.next(getStudent)
.next(getAssessment)
.except(cNoEntry);
}
public static void main(String[] args) {
// Create a scanner to read from standard input.
test6();
/*
* Scanner sc = new Scanner(System.in);
*
* // Read a single integer from the test file
* // and then run the appropriate test case
* switch (sc.nextInt()) {
* case 1:
* test1();
* break;
* case 2:
* test2();
* break;
* case 3:
* test3();
* break;
* case 4:
* test4();
* break;
* case 5:
* test5();
* break;
* case 6:
* test6();
* break;
* }
*/
Scanner sc = new Scanner(System.in);
// Read a single integer from the test file
// and then run the appropriate test case
switch (sc.nextInt()) {
case 1:
test1();
break;
case 2:
test2();
break;
case 3:
test3();
break;
case 4:
test4();
break;
case 5:
test5();
break;
case 6:
test6();
break;
}
}
public static void test1() {

21
Lab5/cs2030s/fp/Actually.java
View File

@ -1,6 +1,6 @@
package cs2030s.fp;
public abstract class Actually<T> implements Immutatorable<T> {
public abstract class Actually<T> implements Immutatorable<T>, Actionable<T> {
public abstract T unwrap() throws Exception;
public abstract T except(Constant<? extends T> c);
@ -9,7 +9,7 @@ public abstract class Actually<T> implements Immutatorable<T> {
public abstract T unless(T other);
public abstract <R> Actually<R> next(Immutator<Actually<R>, T> immutator);
public abstract <R> Actually<R> next(Immutator<Actually<R>, ? super T> immutator);
public static <T> Actually<T> ok(T value) {
return new Success<T>(value);
@ -48,7 +48,7 @@ public abstract class Actually<T> implements Immutatorable<T> {
}
@Override
public <R> Actually<R> next(Immutator<Actually<R>, T> immutator) {
public <R> Actually<R> next(Immutator<Actually<R>, ? super T> immutator) {
try {
return immutator.invoke(this.value);
} catch (Exception e) {
@ -65,6 +65,11 @@ public abstract class Actually<T> implements Immutatorable<T> {
}
}
@Override
public void act(Action<? super T> action) {
action.call(this.value);
}
@Override
public String toString() {
return "<" + value + ">";
@ -112,7 +117,7 @@ public abstract class Actually<T> implements Immutatorable<T> {
}
@Override
public void finish(Action action) {
public void finish(Action<? super Object> action) {
return;
}
@ -122,11 +127,17 @@ public abstract class Actually<T> implements Immutatorable<T> {
}
@Override
public <R> Actually<R> next(Immutator<Actually<R>, Object> immutator) {
public <R> Actually<R> next(Immutator<Actually<R>, ? super Object> immutator) {
return Actually.err(this.e);
}
@Override
public void act(Action<? super Object> action) {
// Do nothing
return;
}
@Override
public String toString() {
return "[" + e.getClass().getName() + "] " + e.getMessage();