abstrakte Klasse Medium mit abstrakten Methoden

Bibliotheksverwaltung/src/DomainLayer/Medium.java

@@ -0,0 +1,77 @@
+package DomainLayer;
+
+import java.time.LocalDate;
+
+public abstract class Medium {
+    private String id;
+    private String title;
+    private String releaseYear;
+    private boolean isBorrowed;
+    private LocalDate borrowDate;
+    private LocalDate dueDate;
+    private int renewals;
+
+    public Medium(String id, String title, String releaseYear) {
+        this.id = id;
+        this.title = title;
+        this.releaseYear = releaseYear;
+        this.isBorrowed = false;
+        this.renewals = 0;
+    }
+
+    public String getId() {
+        return id;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public String getReleaseYear() {
+        return releaseYear;
+    }
+
+    public boolean isBorrowed() {
+        return isBorrowed;
+    }
+
+    public void setBorrowed(boolean borrowed) {
+        this.isBorrowed = borrowed;
+    }
+
+    public LocalDate getDueDate() {
+        return dueDate;
+    }
+
+    public void setDueDate(LocalDate dueDate) {
+        this.dueDate = dueDate;
+    }
+
+    public int getRenewals() {
+        return renewals;
+    }
+
+    public void increaseRenewals() {
+        this.renewals++;
+    }
+
+    public void resetRenewals() {
+        this.renewals = 0;
+    }
+
+    // Abstrakte Methoden
+    public abstract int getBorrowPeriod();
+    public abstract boolean isRenewable();
+    public abstract int getMaxRenewals();
+
+    // Neue Methode für den Autor
+    public abstract String getAuthor();
+
+    public LocalDate getBorrowDate() {
+        return borrowDate;
+    }
+
+    public void setBorrowDate(LocalDate borrowDate) {
+        this.borrowDate = borrowDate;
+    }
+}