Add the non-Spring DynamoDB samples in the AWS module

aws/src/main/java/com/baeldung/dynamodb/entity/ProductInfo.java

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+package com.baeldung.dynamodb.entity;
+
+import com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBAttribute;
+import com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBAutoGeneratedKey;
+import com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBHashKey;
+import com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBTable;
+
+@DynamoDBTable(tableName = "ProductInfo")
+public class ProductInfo {
+
+    private String id;
+    private String msrp;
+    private String cost;
+
+    public ProductInfo() {
+    }
+
+    public ProductInfo(String cost, String msrp) {
+        this.msrp = msrp;
+        this.cost = cost;
+    }
+
+    @DynamoDBHashKey
+    @DynamoDBAutoGeneratedKey
+    public String getId() {
+        return id;
+    }
+
+    @DynamoDBAttribute
+    public String getMsrp() {
+        return msrp;
+    }
+
+    @DynamoDBAttribute
+    public String getCost() {
+        return cost;
+    }
+
+    public void setId(String id) {
+        this.id = id;
+    }
+
+    public void setMsrp(String msrp) {
+        this.msrp = msrp;
+    }
+
+    public void setCost(String cost) {
+        this.cost = cost;
+    }
+
+}

aws/src/main/java/com/baeldung/dynamodb/repository/AbstractRepository.java

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+package com.baeldung.dynamodb.repository;
+
+import com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBMapper;
+import com.amazonaws.services.dynamodbv2.datamodeling.DynamoDBScanExpression;
+
+import java.io.Serializable;
+import java.lang.reflect.ParameterizedType;
+import java.util.List;
+
+public abstract class AbstractRepository<T, ID extends Serializable> {
+
+    protected DynamoDBMapper mapper;
+    protected Class<T> entityClass;
+
+    protected AbstractRepository() {
+        ParameterizedType genericSuperclass = (ParameterizedType) getClass().getGenericSuperclass();
+
+        // This entityClass refers to the actual entity class in the subclass declaration.
+
+        // For instance, ProductInfoDAO extends AbstractDAO<ProductInfo, String>
+        // In this case entityClass = ProductInfo, and ID is String type
+        // which refers to the ProductInfo's partition key string value
+        this.entityClass = (Class<T>) genericSuperclass.getActualTypeArguments()[0];
+    }
+
+    public void save(T t) {
+        mapper.save(t);
+    }
+
+    public T findOne(ID id) {
+        return mapper.load(entityClass, id);
+    }
+
+    /**
+     * <strong>WARNING:</strong> It is not recommended to perform full table scan
+     * targeting the real production environment.
+     *
+     * @return All items
+     */
+    public List<T> findAll() {
+        DynamoDBScanExpression scanExpression = new DynamoDBScanExpression();
+        return mapper.scan(entityClass, scanExpression);
+    }
+
+    public void setMapper(DynamoDBMapper dynamoDBMapper) {
+        this.mapper = dynamoDBMapper;
+    }
+
+}

aws/src/main/java/com/baeldung/dynamodb/repository/ProductInfoRepository.java

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+package com.baeldung.dynamodb.repository;
+
+import com.baeldung.dynamodb.entity.ProductInfo;
+
+public class ProductInfoRepository extends AbstractRepository<ProductInfo, String> {
+}