From b75f528e932c079bc71d00066b5432823c02f729 Mon Sep 17 00:00:00 2001
From: Kostya <mail@sartin.in>
Date: Wed, 22 Jul 2026 20:26:21 +0000
Subject: half done

---
 ex1/src/main/java/reflection/api/App.java          |  12 +--
 .../reflection/api/ReflectionInvestigator.java     | 106 +++++++++++++++++++++
 2 files changed, 111 insertions(+), 7 deletions(-)
 create mode 100644 ex1/src/main/java/reflection/api/ReflectionInvestigator.java

(limited to 'ex1/src/main/java')

diff --git a/ex1/src/main/java/reflection/api/App.java b/ex1/src/main/java/reflection/api/App.java
index 04cd919..aaead40 100644
--- a/ex1/src/main/java/reflection/api/App.java
+++ b/ex1/src/main/java/reflection/api/App.java
@@ -1,10 +1,8 @@
-package com.reflection.api;
+package reflection.api;
 
-/**
- * Hello world!
- */
+/** Hello world! */
 public class App {
-    public static void main(String[] args) {
-        System.out.println("Hello World!");
-    }
+  public static void main(String[] args) {
+    System.out.println("Hello World!");
+  }
 }
diff --git a/ex1/src/main/java/reflection/api/ReflectionInvestigator.java b/ex1/src/main/java/reflection/api/ReflectionInvestigator.java
new file mode 100644
index 0000000..2d18b34
--- /dev/null
+++ b/ex1/src/main/java/reflection/api/ReflectionInvestigator.java
@@ -0,0 +1,106 @@
+package reflection.api;
+
+import java.lang.reflect.Modifier;
+import java.util.Set;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+public class ReflectionInvestigator implements Investigator {
+  private Object subjectInstance;
+  private Class<?> classInfo;
+
+  public ReflectionInvestigator() {}
+
+  @Override
+  public void load(Object anInstanceOfSomething) {
+    subjectInstance = anInstanceOfSomething;
+    classInfo = subjectInstance.getClass();
+  }
+
+  @Override
+  public int getTotalNumberOfMethods() {
+    return classInfo.getDeclaredMethods().length;
+  }
+
+  @Override
+  public int getTotalNumberOfConstructors() {
+    return classInfo.getConstructors().length;
+  }
+
+  @Override
+  public int getTotalNumberOfFields() {
+    return classInfo.getFields().length;
+  }
+
+  @Override
+  public Set<String> getAllImplementedInterfaces() {
+    return Stream.of(classInfo.getInterfaces())
+        .map(info -> info.getName())
+        .collect(Collectors.toSet());
+  }
+
+  @Override
+  public int getCountOfConstantFields() {
+    return Stream.of(classInfo.getFields())
+        .filter(f -> Modifier.isFinal(f.getModifiers()))
+        .toArray()
+        .length;
+  }
+
+  @Override
+  public int getCountOfStaticMethods() {
+    return Stream.of(classInfo.getMethods())
+        .filter(m -> Modifier.isStatic(m.getModifiers()))
+        .toArray()
+        .length;
+  }
+
+  @Override
+  public boolean isExtending() {
+    // TODO Auto-generated method stub
+    throw new UnsupportedOperationException("Unimplemented method 'isExtending'");
+  }
+
+  @Override
+  public String getParentClassSimpleName() {
+    // TODO Auto-generated method stub
+    throw new UnsupportedOperationException("Unimplemented method 'getParentClassSimpleName'");
+  }
+
+  @Override
+  public boolean isParentClassAbstract() {
+    // TODO Auto-generated method stub
+    throw new UnsupportedOperationException("Unimplemented method 'isParentClassAbstract'");
+  }
+
+  @Override
+  public Set<String> getNamesOfAllFieldsIncludingInheritanceChain() {
+    // TODO Auto-generated method stub
+    throw new UnsupportedOperationException(
+        "Unimplemented method 'getNamesOfAllFieldsIncludingInheritanceChain'");
+  }
+
+  @Override
+  public int invokeMethodThatReturnsInt(String methodName, Object... args) {
+    // TODO Auto-generated method stub
+    throw new UnsupportedOperationException("Unimplemented method 'invokeMethodThatReturnsInt'");
+  }
+
+  @Override
+  public Object createInstance(int numberOfArgs, Object... args) {
+    // TODO Auto-generated method stub
+    throw new UnsupportedOperationException("Unimplemented method 'createInstance'");
+  }
+
+  @Override
+  public Object elevateMethodAndInvoke(String name, Class<?>[] parametersTypes, Object... args) {
+    // TODO Auto-generated method stub
+    throw new UnsupportedOperationException("Unimplemented method 'elevateMethodAndInvoke'");
+  }
+
+  @Override
+  public String getInheritanceChain(String delimiter) {
+    // TODO Auto-generated method stub
+    throw new UnsupportedOperationException("Unimplemented method 'getInheritanceChain'");
+  }
+}
-- 
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