JAVA-12421 Renamed graphql to graphql-modules

graphql-modules/graphql-spqr/src/main/java/com/baeldung/spqr/BookService.java

@@ -0,0 +1,51 @@
+package com.baeldung.spqr;
+
+import io.leangen.graphql.annotations.GraphQLArgument;
+import io.leangen.graphql.annotations.GraphQLMutation;
+import io.leangen.graphql.annotations.GraphQLQuery;
+import io.leangen.graphql.spqr.spring.annotations.GraphQLApi;
+import org.springframework.stereotype.Service;
+
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+@Service
+@GraphQLApi
+public class BookService implements IBookService {
+
+    Set<Book> books = new HashSet<>();
+
+    @GraphQLQuery(name = "getBookWithTitle")
+    public Book getBookWithTitle(@GraphQLArgument(name = "title") String title) {
+        return books.stream()
+            .filter(book -> book.getTitle()
+                .equals(title))
+            .findFirst()
+            .orElse(null);
+    }
+
+    @GraphQLQuery(name = "getAllBooks", description = "Get all books")
+    public List<Book> getAllBooks() {
+        return books.stream().collect(Collectors.toList());
+    }
+
+    @GraphQLMutation(name = "addBook")
+    public Book addBook(@GraphQLArgument(name = "newBook") Book book) {
+        books.add(book);
+        return book;
+    }
+
+    @GraphQLMutation(name = "updateBook")
+    public Book updateBook(@GraphQLArgument(name = "modifiedBook") Book book) {
+        books.remove(book);
+        books.add(book);
+        return book;
+    }
+
+    @GraphQLMutation(name = "deleteBook")
+    public boolean deleteBook(@GraphQLArgument(name = "book") Book book) {
+        return books.remove(book);
+    }
+}