Add APIUtils.java for utility methods to be used by APIWrapper.java

src/main/java/me/goudham/APIUtils.java

@@ -0,0 +1,35 @@
+package me.goudham;
+
+import com.fasterxml.jackson.databind.JavaType;
+import com.fasterxml.jackson.databind.type.TypeFactory;
+import me.goudham.domain.pagination.PaginationData;
+import me.goudham.domain.series.Series;
+import me.goudham.domain.waifu.Waifu;
+
+import java.util.List;
+
+/**
+ * Includes helper methods to use within {@link APIWrapper}
+ *
+ */
+class APIUtils {
+
+    /**
+     * @param model The actual class of the given model. E.g {@link Waifu#getClass()}
+     * @param <T> The type of model to be returned. E.g {@link Waifu} or {@link Series}
+     * @return {@link JavaType} of {@link List}
+     *
+     */
+    static <T> JavaType listOf(Class<T> model) {
+        return TypeFactory.defaultInstance().constructCollectionType(List.class, model);
+    }
+
+    /**
+     * @param model The actual class of the given model. E.g {@link Waifu#getClass()}
+     * @param <T> The type of model to be returned. E.g {@link Waifu} or {@link Series}
+     * @return {@link JavaType} of {@link PaginationData}
+     */
+    static <T> JavaType paginationData(Class<T> model) {
+        return TypeFactory.defaultInstance().constructParametricType(PaginationData.class, model);
+    }
+}