From c9b6b9a5ca082fe7c1b6f58d7713f785a9eb6a5c Mon Sep 17 00:00:00 2001
From: Martial Simon <msimon_fr@hotmail.com>
Date: Mon, 15 Sep 2025 01:08:27 +0200
Subject: add: graphs et rushs

---
 .../fr/epita/assistants/streamstudent/Pair.java    | 67 ++++++++++++++++++++++
 .../epita/assistants/streamstudent/Streamer.java   | 58 +++++++++++++++++++
 2 files changed, 125 insertions(+)
 create mode 100644 graphs/java/streamStudent/src/main/java/fr/epita/assistants/streamstudent/Pair.java
 create mode 100644 graphs/java/streamStudent/src/main/java/fr/epita/assistants/streamstudent/Streamer.java

(limited to 'graphs/java/streamStudent/src/main')

diff --git a/graphs/java/streamStudent/src/main/java/fr/epita/assistants/streamstudent/Pair.java b/graphs/java/streamStudent/src/main/java/fr/epita/assistants/streamstudent/Pair.java
new file mode 100644
index 0000000..c3cde84
--- /dev/null
+++ b/graphs/java/streamStudent/src/main/java/fr/epita/assistants/streamstudent/Pair.java
@@ -0,0 +1,67 @@
+package fr.epita.assistants.streamstudent;
+
+public class Pair<K, V> {
+
+    /**
+     * Key of this pair.
+     */
+    private K key;
+
+    /**
+     * Gets the key for this pair.
+     *
+     * @return key for this pair
+     */
+    public K getKey() {
+        return key;
+    }
+
+    /**
+     * Value of this pair.
+     */
+    private V value;
+
+    /**
+     * Gets the value for this pair.
+     *
+     * @return value for this pair
+     */
+    public V getValue() {
+        return value;
+    }
+
+    /**
+     * Creates a new pair.
+     *
+     * @param key   The key for this pair
+     * @param value The value to use for this pair
+     */
+    public Pair(K key, V value) {
+        this.key = key;
+        this.value = value;
+    }
+
+
+    @Override
+    public int hashCode() {
+        return key.hashCode() * 13 + (value == null ? 0 : value.hashCode());
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o instanceof Pair) {
+            Pair pair = (Pair) o;
+            if (key != null ? !key.equals(pair.key) : pair.key != null) return false;
+            if (value != null ? !value.equals(pair.value) : pair.value != null) return false;
+            return true;
+        }
+        return false;
+    }
+
+    @Override
+    public String toString() {
+        return "(" + key + ", " + value + ")";
+    }
+}
+
diff --git a/graphs/java/streamStudent/src/main/java/fr/epita/assistants/streamstudent/Streamer.java b/graphs/java/streamStudent/src/main/java/fr/epita/assistants/streamstudent/Streamer.java
new file mode 100644
index 0000000..87654a4
--- /dev/null
+++ b/graphs/java/streamStudent/src/main/java/fr/epita/assistants/streamstudent/Streamer.java
@@ -0,0 +1,58 @@
+package fr.epita.assistants.streamstudent;
+
+import java.util.Comparator;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.regex.Pattern;
+import java.util.stream.Stream;
+
+public class Streamer {
+    public Stream<Pair<Integer, String>> validator(Stream<Pair<Integer, String>> stream) {
+        return stream.filter(student -> student.getKey() >= 0 && student.getKey() <= 100 && (Pattern.matches("[^_" +
+                ".]*\\.[^_.]*", student.getValue()) || Pattern.matches("[^._]*_[^._]*", student.getValue())));
+    }
+
+    public Stream<Pair<Integer, String>> orderGrade(Stream<Pair<Integer, String>> stream) {
+        return stream.sorted((i, j) -> {
+            if (!Objects.equals(i.getKey(), j.getKey()))
+                return i.getKey().compareTo(j.getKey());
+            else
+                return i.getValue().compareTo(j.getValue());
+        });
+    }
+
+    public Stream<Pair<Integer, String>> lowercase(Stream<Pair<Integer, String>> stream) {
+        return stream.map(i -> {
+            if (Pattern.matches(".*[A-Z]+.*", i.getValue())) {
+                return new Pair<>(i.getKey() / 2, i.getValue().toLowerCase());
+            } else
+                return new Pair<>(i.getKey(), i.getValue().toLowerCase());
+        });
+    }
+
+    public Optional<Pair<Integer, String>> headOfTheClass(Stream<Pair<Integer, String>> stream) {
+        return stream.max((i, j) -> {
+            if (j.getKey().equals(i.getKey()))
+                return j.getValue().compareTo(i.getValue());
+            else
+                return i.getKey().compareTo(j.getKey());
+        });
+    }
+
+    public Stream<Pair<Integer, String>> quickFix(Stream<Pair<Integer, String>> stream) {
+        return stream.map(i -> {
+            if (Pattern.matches("[mM][Aa].*", i.getValue()) || Pattern.matches("[lL].*[xX]", i.getValue())) {
+                return new Pair<>(Math.clamp(i.getKey() * 2, 0, 100), i.getValue());
+            } else return i;
+        });
+    }
+
+    public Stream<Pair<Integer, String>> encryption(Stream<Pair<Integer, String>> stream) {
+        return stream.map(i -> {
+            StringBuilder sb = new StringBuilder();
+            sb.append(i.getValue(), i.getValue().length() / 2, i.getValue().length());
+            sb.append(i.getValue(), 0, i.getValue().length() / 2);
+            return new Pair<>(i.getKey(), sb.toString());
+        });
+    }
+}
-- 
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