/*
* Copyright 2013 Nicolas Morel
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.github.nmorel.gwtjackson.shared.advanced.jsontype;
import java.util.Arrays;
import java.util.List;
import com.fasterxml.jackson.annotation.JsonPropertyOrder;
import com.github.nmorel.gwtjackson.client.exception.JsonDeserializationException;
import com.github.nmorel.gwtjackson.shared.AbstractTester;
import com.github.nmorel.gwtjackson.shared.ObjectReaderTester;
import com.github.nmorel.gwtjackson.shared.ObjectWriterTester;
/**
* @author Nicolas Morel
*/
public final class PolymorphismNoTypeInfoTester extends AbstractTester {
@JsonPropertyOrder( alphabetic = true )
public static interface Person {
String getName();
void setName( String name );
}
public static class Employee implements Person {
private String name;
public int id;
public String title;
@Override
public String getName() {
return name;
}
@Override
public void setName( String name ) {
this.name = name;
}
}
public static class Manager extends Employee {
public List<Employee> managedEmployees;
}
public static class Customer implements Person {
private String name;
public int satisfaction;
@Override
public String getName() {
return name;
}
@Override
public void setName( String name ) {
this.name = name;
}
}
public static final PolymorphismNoTypeInfoTester INSTANCE = new PolymorphismNoTypeInfoTester();
private PolymorphismNoTypeInfoTester() {
}
public void testSerialize( ObjectWriterTester<Person[]> writer ) {
Person[] persons = new Person[4];
Employee employee2 = new Employee();
employee2.setName( "Thomas" );
employee2.id = 2;
employee2.title = "Waiter";
persons[0] = employee2;
Employee employee3 = new Employee();
employee3.setName( "Patricia" );
employee3.id = 3;
employee3.title = "Cook";
persons[1] = employee3;
Manager manager = new Manager();
manager.setName( "Bob" );
manager.id = 1;
manager.title = "Boss";
manager.managedEmployees = Arrays.asList( employee2, employee3 );
persons[2] = manager;
Customer customer = new Customer();
customer.setName( "Brad" );
customer.satisfaction = 90;
persons[3] = customer;
String result = writer.write( persons );
String expected = "[" +
"{" +
"\"id\":2," +
"\"name\":\"Thomas\"," +
"\"title\":\"Waiter\"" +
"}," +
"{" +
"\"id\":3," +
"\"name\":\"Patricia\"," +
"\"title\":\"Cook\"" +
"}," +
"{" +
"\"id\":1," +
"\"managedEmployees\":" +
"[" +
"{" +
"\"id\":2," +
"\"name\":\"Thomas\"," +
"\"title\":\"Waiter\"" +
"}," +
"{" +
"\"id\":3," +
"\"name\":\"Patricia\"," +
"\"title\":\"Cook\"" +
"}" +
"]," +
"\"name\":\"Bob\"," +
"\"title\":\"Boss\"" +
"}," +
"{" +
"\"name\":\"Brad\"," +
"\"satisfaction\":90" +
"}" +
"]";
assertEquals( expected, result );
}
/**
* There is no information about the type to use and the superclass is not instantiable so we can't do anything, an exception is
* thrown.
*
* @param reader GWT or Jackson reader
*/
public void testDeserializeNonInstantiableBean( ObjectReaderTester<Person[]> reader ) {
String input = "[" +
"{" +
"\"id\":2," +
"\"name\":\"Thomas\"," +
"\"title\":\"Waiter\"" +
"}," +
"{" +
"\"id\":3," +
"\"name\":\"Patricia\"," +
"\"title\":\"Cook\"" +
"}," +
"{" +
"\"id\":1," +
"\"managedEmployees\":" +
"[" +
"{" +
"\"id\":2," +
"\"name\":\"Thomas\"," +
"\"title\":\"Waiter\"" +
"}," +
"{" +
"\"id\":3," +
"\"name\":\"Patricia\"," +
"\"title\":\"Cook\"" +
"}" +
"]," +
"\"name\":\"Bob\"," +
"\"title\":\"Boss\"" +
"}," +
"{" +
"\"name\":\"Brad\"," +
"\"satisfaction\":90" +
"}" +
"]";
try {
reader.read( input );
fail();
} catch ( JsonDeserializationException e ) {
// it's the normal behaviour
}
}
/**
* There is no information about the type to use but the superclass is instantiable so we can instantiate it and set its attributes.
*
* @param reader GWT or Jackson reader
*/
public void testDeserializeInstantiableBean( ObjectReaderTester<Employee[]> reader ) {
String input = "[" +
"{" +
"\"id\":2," +
"\"name\":\"Thomas\"," +
"\"title\":\"Waiter\"" +
"}," +
"{" +
"\"id\":3," +
"\"name\":\"Patricia\"," +
"\"title\":\"Cook\"" +
"}," +
"{" +
"\"id\":1," +
"\"managedEmployees\":" +
"[" +
"{" +
"\"id\":2," +
"\"name\":\"Thomas\"," +
"\"title\":\"Waiter\"" +
"}," +
"{" +
"\"id\":3," +
"\"name\":\"Patricia\"," +
"\"title\":\"Cook\"" +
"}" +
"]," +
"\"name\":\"Bob\"," +
"\"title\":\"Boss\"" +
"}" +
"]";
Person[] result = reader.read( input );
{
// Employee
Employee employee = (Employee) result[0];
assertEquals( 2, employee.id );
assertEquals( "Waiter", employee.title );
assertEquals( "Thomas", employee.getName() );
}
{
// Employee
Employee employee = (Employee) result[1];
assertEquals( 3, employee.id );
assertEquals( "Cook", employee.title );
assertEquals( "Patricia", employee.getName() );
}
{
// Manager
Employee manager = (Employee) result[2];
assertEquals( 1, manager.id );
assertEquals( "Boss", manager.title );
assertEquals( "Bob", manager.getName() );
assertFalse( manager instanceof Manager );
}
}
}