Adapter Pattern

oop-in-spring/practice/design-pattern/adapterPattern/README.md

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+# 어댑터 패턴

oop-in-spring/practice/design-pattern/adapterPattern/SearchService.java

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+package adapterPattern;
+
+public interface SearchService {
+    SearchResult search(String keyword);
+}

oop-in-spring/practice/design-pattern/adapterPattern/SearchServiceTolrAdapter.java

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+import adapterPattern.SearchService;
+
+public class SearchServiceTolrAdapter implements SearchService {
+    private TolrClient tolrClient = new TolrClient();
+
+    @Override
+    public SearchResult search(String keyword) {
+        // keyword를 tolrClient가 요구하는 형식으로 변환
+        TolrQuery tolrQuery = new TolrQuery(keyword);
+
+        // TolrClient 기능 실행
+        QueryResponse response = tolrClient.query(tolrQuery);
+
+        SearchResult result = convertToResult(response);
+        return result;
+    }
+
+    private SearchResult convertToResult(QueryResponse response) {
+        List<TolrDocument> tolrDocs = response.getDocumentList().getDocuments();
+        List<SearchDocument> docs = new ArrayList<SearchDocument>();
+        for(TolrDocument tolrDoc: tolrDocs) {
+            docs.add(new SearchDocument(tolrDocs.getId(), ...));
+        }
+        return new SearchResult(docs);
+    }
+}

oop-in-spring/practice/design-pattern/adapterPattern/SearchServiceTolrAdapter2.java

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+package adapterPattern;
+
+public class SearchServiceTolrAdapter2 extends TolrClient {
+
+    public SearchResult search(String keyword) {
+        // keyword를 tolrClient가 요구하는 형식으로 변환
+        TolrQuery tolrQuery = new TolrQuery(keyword);
+
+        // TolrClient 기능 실행
+        QueryResponse response = super.query(tolrQuery);
+
+        // TolrClient의 결과를 SearchResult로 변환
+        SearchResult result = convertToResult(response);
+        return result;
+    }
+
+    private SearchResult convertToResult(QueryResponse response) {
+        List<TolrDocument> tolrDocs = response.getDocumentList().getDocuments();
+        List<SearchDocument> docs = new ArrayList<SearchDocument>();
+        for(TolrDocument tolrDoc: tolrDocs) {
+            docs.add(new SearchDocument(tolrDocs.getId(), ...));
+        }
+        return new SearchResult(docs);
+    }
+}