Add command data and wrappers.

src/main/java/space/kklochko/jdbc_hospital_example/cli/commands/CommandData.java

@@ -0,0 +1,14 @@
+package space.kklochko.jdbc_hospital_example.cli.commands;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+
+import java.util.Map;
+
+@AllArgsConstructor
+@Data
+public class CommandData {
+    public String name;
+    public String datatype;
+    public Map<String, String> arguments;
+}

src/main/java/space/kklochko/jdbc_hospital_example/cli/commands/CommandEntities.java

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+package space.kklochko.jdbc_hospital_example.cli.commands;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import space.kklochko.jdbc_hospital_example.db.repositories.AbstractRepository;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.util.ArrayList;
+
+@AllArgsConstructor
+@Data
+public class CommandEntities<T> {
+    private AbstractRepository<T> repository;
+    private Method method;
+
+    public ArrayList<T> run() {
+        try {
+            return (ArrayList<T>) method.invoke(getRepository());
+        } catch (InvocationTargetException e) {
+            System.err.println(e.getMessage());
+            throw new RuntimeException(e);
+        } catch (IllegalAccessException e) {
+            System.err.println(e.getMessage());
+            throw new RuntimeException(e);
+        }
+    };
+}

src/main/java/space/kklochko/jdbc_hospital_example/cli/commands/CommandEntity.java

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+package space.kklochko.jdbc_hospital_example.cli.commands;
+
+import lombok.Data;
+import space.kklochko.jdbc_hospital_example.db.repositories.AbstractRepository;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
+@Data
+public class CommandEntity <A, T> {
+    private AbstractRepository<T> repository;
+    private Method method;
+    private A argument;
+
+    public CommandEntity(AbstractRepository<T> repository, Method method, A argument) {
+        this.repository = repository;
+        this.method = method;
+        this.argument = argument;
+    }
+
+    public boolean run() {
+        try {
+            return (Boolean) method.invoke(getRepository(), getArgument());
+        } catch (InvocationTargetException e) {
+            System.err.println(e.getMessage());
+            throw new RuntimeException(e);
+        } catch (IllegalAccessException e) {
+            System.err.println(e.getMessage());
+            throw new RuntimeException(e);
+        }
+    };
+}