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BAEL-3326, "Optimizing JSON Schema for production use": 

Optimized imports and formatted source.
This commit is contained in:
Karsten Silz 2020-09-05 18:48:35 +01:00
parent a7dc3199ad
commit 1ab520e63a
8 changed files with 86 additions and 70 deletions
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2
json/src/main/java/com/baeldung/jsonoptimization/Customer.java
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@ -116,7 +116,7 @@ public class Customer {
public static Customer[] fromMockFile() throws IOException {
ObjectMapper objectMapper = new ObjectMapper();
InputStream jsonFile = new FileInputStream("src/test/resources/json_optimization_mock_data.json");
InputStream jsonFile = new FileInputStream("src/test/resources/json_optimization_mock_data.json");
Customer[] feedback = objectMapper.readValue(jsonFile, Customer[].class);
return feedback;
}

32
json/src/main/java/com/baeldung/jsonoptimization/CustomerDeserializer.java
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@ -2,39 +2,43 @@ package com.baeldung.jsonoptimization;
import java.io.IOException;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.ObjectCodec;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
import com.fasterxml.jackson.databind.ser.std.StdSerializer;
public class CustomerDeserializer extends StdDeserializer<Customer> {
public class CustomerDeserializer extends StdDeserializer<Customer> {
private static final long serialVersionUID = 1L;
public CustomerDeserializer() {
this(null);
}
public CustomerDeserializer(Class<Customer> t) {
super(t);
}
@Override
public Customer deserialize(JsonParser parser, DeserializationContext deserializer) throws IOException {
Customer feedback = new Customer();
ObjectCodec codec = parser.getCodec();
JsonNode node = codec.readTree(parser);
feedback.setId(node.get(0).asLong());
feedback.setFirstName(node.get(1).asText());
feedback.setLastName(node.get(2).asText());
feedback.setStreet(node.get(3).asText());
feedback.setPostalCode(node.get(4).asText());
feedback.setCity(node.get(5).asText());
feedback.setState(node.get(6).asText());
feedback.setId(node.get(0)
.asLong());
feedback.setFirstName(node.get(1)
.asText());
feedback.setLastName(node.get(2)
.asText());
feedback.setStreet(node.get(3)
.asText());
feedback.setPostalCode(node.get(4)
.asText());
feedback.setCity(node.get(5)
.asText());
feedback.setState(node.get(6)
.asText());
JsonNode phoneNumber = node.get(7);
feedback.setPhoneNumber(phoneNumber.isNull() ? null : phoneNumber.asText());
JsonNode email = node.get(8);

16
json/src/main/java/com/baeldung/jsonoptimization/CustomerNoNull.java
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@ -4,19 +4,19 @@ import com.fasterxml.jackson.annotation.JsonInclude;
@JsonInclude(JsonInclude.Include.NON_NULL)
public class CustomerNoNull extends Customer {
@Override
public String toString() {
return "CustomerNoNull [toString()=" + super.toString() + "]";
}
public static CustomerNoNull[] fromCustomers(Customer[] customers) {
CustomerNoNull[] feedback = new CustomerNoNull[customers.length];
for(int i = 0; i < customers.length; i++) {
CustomerNoNull[] feedback = new CustomerNoNull[customers.length];
for (int i = 0; i < customers.length; i++) {
Customer aCustomer = customers[i];
CustomerNoNull newOne = new CustomerNoNull();
newOne.setId(aCustomer.getId());
newOne.setFirstName(aCustomer.getFirstName());
newOne.setLastName(aCustomer.getLastName());
@ -26,11 +26,11 @@ public class CustomerNoNull extends Customer {
newOne.setState(aCustomer.getState());
newOne.setPhoneNumber(aCustomer.getPhoneNumber());
newOne.setEmail(aCustomer.getEmail());
feedback[i] = newOne;
}
return feedback;
}
}

8
json/src/main/java/com/baeldung/jsonoptimization/CustomerSerializer.java
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@ -6,21 +6,21 @@ import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.fasterxml.jackson.databind.ser.std.StdSerializer;
public class CustomerSerializer extends StdSerializer<Customer> {
public class CustomerSerializer extends StdSerializer<Customer> {
private static final long serialVersionUID = 1L;
public CustomerSerializer() {
this(null);
}
public CustomerSerializer(Class<Customer> t) {
super(t);
}
@Override
public void serialize(Customer customer, JsonGenerator jsonGenerator, SerializerProvider serializer) throws IOException {
jsonGenerator.writeStartArray();
jsonGenerator.writeNumber(customer.getId());
jsonGenerator.writeNumber(customer.getId());
jsonGenerator.writeString(customer.getFirstName());
jsonGenerator.writeString(customer.getLastName());
jsonGenerator.writeString(customer.getStreet());

58
json/src/main/java/com/baeldung/jsonoptimization/CustomerShortNames.java
View File

@ -2,97 +2,113 @@ package com.baeldung.jsonoptimization;
import java.util.Objects;
import com.fasterxml.jackson.annotation.JsonGetter;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.annotation.JsonProperty;
public class CustomerShortNames {
private long id;
@JsonProperty("f")
private String firstName;
@JsonProperty("l")
private String lastName;
@JsonProperty("s")
private String street;
@JsonProperty("p")
private String postalCode;
@JsonProperty("c")
private String city;
@JsonProperty("a")
private String state;
@JsonProperty("o")
private String phoneNumber;
@JsonProperty("e")
private String email;
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String getStreet() {
return street;
}
public void setStreet(String street) {
this.street = street;
}
public String getPostalCode() {
return postalCode;
}
public void setPostalCode(String postalCode) {
this.postalCode = postalCode;
}
public String getCity() {
return city;
}
public void setCity(String city) {
this.city = city;
}
public String getState() {
return state;
}
public void setState(String state) {
this.state = state;
}
public String getPhoneNumber() {
return phoneNumber;
}
public void setPhoneNumber(String phoneNumber) {
this.phoneNumber = phoneNumber;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
@Override
public int hashCode() {
return Objects.hash(city, email, firstName, id, lastName, phoneNumber, postalCode, state, street);
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
@ -105,20 +121,20 @@ public class CustomerShortNames {
return Objects.equals(city, other.city) && Objects.equals(email, other.email) && Objects.equals(firstName, other.firstName) && id == other.id && Objects.equals(lastName, other.lastName) && Objects.equals(phoneNumber, other.phoneNumber)
&& Objects.equals(postalCode, other.postalCode) && Objects.equals(state, other.state) && Objects.equals(street, other.street);
}
@Override
public String toString() {
return "CustomerWithShorterAttributes [id=" + id + ", firstName=" + firstName + ", lastName=" + lastName + ", street=" + street + ", postalCode=" + postalCode + ", city=" + city + ", state=" + state + ", phoneNumber=" + phoneNumber + ", email=" + email
+ "]";
}
}
public static CustomerShortNames[] fromCustomers(Customer[] customers) {
CustomerShortNames[] feedback = new CustomerShortNames[customers.length];
for(int i = 0; i < customers.length; i++) {
CustomerShortNames[] feedback = new CustomerShortNames[customers.length];
for (int i = 0; i < customers.length; i++) {
Customer aCustomer = customers[i];
CustomerShortNames newOne = new CustomerShortNames();
newOne.setId(aCustomer.getId());
newOne.setFirstName(aCustomer.getFirstName());
newOne.setLastName(aCustomer.getLastName());
@ -128,11 +144,11 @@ public class CustomerShortNames {
newOne.setState(aCustomer.getState());
newOne.setPhoneNumber(aCustomer.getPhoneNumber());
newOne.setEmail(aCustomer.getEmail());
feedback[i] = newOne;
}
return feedback;
}
}

18
json/src/main/java/com/baeldung/jsonoptimization/CustomerShortNamesNoNull.java
View File

@ -1,24 +1,22 @@
package com.baeldung.jsonoptimization;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.annotation.JsonProperty;
@JsonInclude(JsonInclude.Include.NON_NULL)
public class CustomerShortNamesNoNull extends CustomerShortNames {
@Override
public String toString() {
return "CustomerShortNamesNoNull [toString()=" + super.toString() + "]";
}
public static CustomerShortNamesNoNull[] fromCustomers(Customer[] customers) {
CustomerShortNamesNoNull[] feedback = new CustomerShortNamesNoNull[customers.length];
for(int i = 0; i < customers.length; i++) {
CustomerShortNamesNoNull[] feedback = new CustomerShortNamesNoNull[customers.length];
for (int i = 0; i < customers.length; i++) {
Customer aCustomer = customers[i];
CustomerShortNamesNoNull newOne = new CustomerShortNamesNoNull();
newOne.setId(aCustomer.getId());
newOne.setFirstName(aCustomer.getFirstName());
newOne.setLastName(aCustomer.getLastName());
@ -28,10 +26,10 @@ public class CustomerShortNamesNoNull extends CustomerShortNames {
newOne.setState(aCustomer.getState());
newOne.setPhoneNumber(aCustomer.getPhoneNumber());
newOne.setEmail(aCustomer.getEmail());
feedback[i] = newOne;
}
return feedback;
}

13
json/src/main/java/com/baeldung/jsonoptimization/CustomerSlim.java
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@ -54,21 +54,20 @@ public class CustomerSlim {
}
public static CustomerSlim[] fromCustomers(Customer[] customers) {
CustomerSlim[] feedback = new CustomerSlim[customers.length];
for(int i = 0; i < customers.length; i++) {
CustomerSlim[] feedback = new CustomerSlim[customers.length];
for (int i = 0; i < customers.length; i++) {
Customer aCustomer = customers[i];
CustomerSlim newOne = new CustomerSlim();
newOne.setId(aCustomer.getId());
newOne.setName(aCustomer.getFirstName() + " " + aCustomer.getLastName());
newOne.setAddress(aCustomer.getStreet() + ", " + aCustomer.getCity() + " " + aCustomer.getState() + " " + aCustomer.getPostalCode());
feedback[i] = newOne;
}
return feedback;
}
}

9
json/src/test/java/com/baeldung/jsonoptimization/JsonOptimizationUnitTest.java
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@ -15,7 +15,6 @@ import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.core.Version;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.ObjectWriter;
@ -77,7 +76,7 @@ class JsonOptimizationUnitTest {
byte[] shorterJson = createPlainJson(TEST_LABEL_SHORTER_ATTRIBUTE_NAMES_NO_NULL, shorterOnesNoNull);
compressJson(TEST_LABEL_SHORTER_ATTRIBUTE_NAMES_NO_NULL, shorterJson);
}
@Test
void testSlim() throws IOException {
printBanner(TEST_LABEL_SLIM_CUSTOMER);
@ -89,11 +88,11 @@ class JsonOptimizationUnitTest {
@Test
void testCustomSerializer() throws IOException {
printBanner(TEST_LABEL_CUSTOM_SERIALIZER);
SimpleModule serializer = new SimpleModule("CustomCustomerSerializer", new Version(1, 0, 0, null, null, null));
serializer.addSerializer(Customer.class, new CustomerSerializer());
mapper.registerModule(serializer);
SimpleModule deserializer = new SimpleModule("CustomCustomerDeserializer", new Version(1, 0, 0, null, null, null));
deserializer.addDeserializer(Customer.class, new CustomerDeserializer());
mapper.registerModule(deserializer);
@ -135,7 +134,7 @@ class JsonOptimizationUnitTest {
fos.write(feedback);
fos.close();
System.out.println(label + " file: " + tempFile.toString());
Object[] restoredOnes = mapper.readValue(feedback, customers.getClass());
assertArrayEquals(TEST_LABEL_DEFAULT_JSON + ": restoring from JSON should work", customers, restoredOnes);