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package readme;
import graphql.Scalars;
import graphql.schema.DataFetcher;
import graphql.schema.DataFetchingEnvironment;
import graphql.schema.FieldCoordinates;
import graphql.schema.GraphQLCodeRegistry;
import graphql.schema.GraphQLFieldDefinition;
import graphql.schema.PropertyDataFetcher;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import static graphql.schema.FieldCoordinates.coordinates;
@SuppressWarnings({"Convert2Lambda", "unused", "ClassCanBeStatic"})
public class MappingExamples {
interface ProductInfo {
String getId();
String getName();
String getDescription();
}
interface ProductCostInfo {
float getCost();
}
interface ProductTaxInfo {
float getTax();
}
void productsDataFetcher() {
DataFetcher productsDataFetcher = new DataFetcher() {
@Override
public Object get(DataFetchingEnvironment env) {
String matchArg = env.getArgument("match");
List<ProductInfo> productInfo = getMatchingProducts(matchArg);
List<ProductCostInfo> productCostInfo = getProductCosts(productInfo);
List<ProductTaxInfo> productTaxInfo = getProductTax(productInfo);
return mapDataTogether(productInfo, productCostInfo, productTaxInfo);
}
};
}
private Object mapDataTogether(List<ProductInfo> productInfo, List<ProductCostInfo> productCostInfo, List<ProductTaxInfo> productTaxInfo) {
return null;
}
private List<Map> mapDataTogetherViaMap(List<ProductInfo> productInfo, List<ProductCostInfo> productCostInfo, List<ProductTaxInfo> productTaxInfo) {
List<Map> unifiedView = new ArrayList<>();
for (int i = 0; i < productInfo.size(); i++) {
ProductInfo info = productInfo.get(i);
ProductCostInfo cost = productCostInfo.get(i);
ProductTaxInfo tax = productTaxInfo.get(i);
Map<String, Object> objectMap = new HashMap<>();
objectMap.put("id", info.getId());
objectMap.put("name", info.getName());
objectMap.put("description", info.getDescription());
objectMap.put("cost", cost.getCost());
objectMap.put("tax", tax.getTax());
unifiedView.add(objectMap);
}
return unifiedView;
}
class ProductDTO {
private final String id;
private final String name;
private final String description;
private final Float cost;
private final Float tax;
public ProductDTO(String id, String name, String description, Float cost, Float tax) {
this.id = id;
this.name = name;
this.description = description;
this.cost = cost;
this.tax = tax;
}
public String getId() {
return id;
}
public String getName() {
return name;
}
public String getDescription() {
return description;
}
public Float getCost() {
return cost;
}
public Float getTax() {
return tax;
}
}
private List<ProductDTO> mapDataTogetherViaDTO(List<ProductInfo> productInfo, List<ProductCostInfo> productCostInfo, List<ProductTaxInfo> productTaxInfo) {
List<ProductDTO> unifiedView = new ArrayList<>();
for (int i = 0; i < productInfo.size(); i++) {
ProductInfo info = productInfo.get(i);
ProductCostInfo cost = productCostInfo.get(i);
ProductTaxInfo tax = productTaxInfo.get(i);
ProductDTO productDTO = new ProductDTO(
info.getId(),
info.getName(),
info.getDescription(),
cost.getCost(),
tax.getTax()
);
unifiedView.add(productDTO);
}
return unifiedView;
}
private void directWiring() {
GraphQLFieldDefinition descriptionField = GraphQLFieldDefinition.newFieldDefinition()
.name("description")
.type(Scalars.GraphQLString)
.build();
GraphQLCodeRegistry codeRegistry = GraphQLCodeRegistry.newCodeRegistry()
.dataFetcher(
coordinates("ObjectType", "description"),
PropertyDataFetcher.fetching("desc"))
.build();
}
private List<ProductInfo> getMatchingProducts(String matchArg) {
return null;
}
private List<ProductCostInfo> getProductCosts(List<ProductInfo> productInfo) {
return null;
}
private List<ProductTaxInfo> getProductTax(List<ProductInfo> productInfo) {
return null;
}
}