Create pattern.java

pattern-search-api/pattern.java

@@ -0,0 +1,65 @@
+package com.example.patternsearch;
+
+public class Pattern {
+    private String name;
+    private String description;
+
+    public Pattern(String name, String description) {
+        this.name = name;
+        this.description = description;
+    }
+
+    public String getName() { return name; }
+    public String getDescription() { return description; }
+}
+
+PatternController.java
+  package com.example.patternsearch;
+
+import org.springframework.web.bind.annotation.*;
+import java.util.*;
+import java.util.stream.Collectors;
+
+@RestController
+@RequestMapping("/api/patterns")
+public class PatternController {
+
+    private List<Pattern> patterns = List.of(
+        new Pattern("Strategy", "Encapsulate algorithms"),
+        new Pattern("Observer", "Subscribe/notify model"),
+        new Pattern("Factory Method", "Create objects without specifying class"),
+        new Pattern("Builder", "Stepwise object construction"),
+        new Pattern("Decorator", "Add behavior dynamically")
+    );
+
+    @GetMapping("/search")
+    public List<Pattern> searchPatterns(@RequestParam String query) {
+        return patterns.stream()
+                .filter(p -> p.getName().toLowerCase().contains(query.toLowerCase()))
+                .collect(Collectors.toList());
+    }
+}
+index.html:
+<input type="text" id="patternSearch" placeholder="Search patterns..." />
+
+<ul id="patternList">
+  <!-- dynamic content here -->
+</ul>
+
+<script>
+async function fetchPatterns(query) {
+  const res = await fetch(`http://localhost:8080/api/patterns/search?query=${query}`);
+  const data = await res.json();
+  const list = document.getElementById("patternList");
+  list.innerHTML = "";
+  data.forEach(p => {
+    const li = document.createElement("li");
+    li.textContent = p.name + " - " + p.description;
+    list.appendChild(li);
+  });
+}
+
+document.getElementById("patternSearch").addEventListener("input", (e) => {
+  fetchPatterns(e.target.value);
+});
+</script>