Here's very simple scenario in which I got value object that I want to un-wrap for serialization. Using custom Serializer is not an option.
public class UnwrappedWithPropertyName {
public static void main(String[] args) throws JsonProcessingException {
final Address address = new Address(new Postcode("45678"));
final ObjectMapper mapper = new ObjectMapper();
System.out.println(mapper.writeValueAsString(address));
}
static class Address {
#JsonUnwrapped
#JsonProperty("postcode")
private final Postcode postcode;
Address(Postcode postcode) {
this.postcode = postcode;
}
public Postcode getPostcode() {
return postcode;
}
}
static class Postcode {
private final String value;
Postcode(String value) {
this.value = value;
}
public String getValue() {
return value;
}
}
}
That will result in {"value":"45678"} and what I would expect is {"postcode":"45678"}
By annotating field with #JsonValue one can control the name of such field from enclosing class.
static class Address {
#JsonProperty("postcode")
private final Postcode postcode;
Address(Postcode postcode) {
this.postcode = postcode;
}
public Postcode getPostcode() {
return postcode;
}
}
static class Postcode {
#JsonValue
private final String value;
Postcode(String value) {
this.value = value;
}
}
Move #JsonProperty("postcode") to private final String value;
Related
I am doing a REST API with Java Resteasy framework (using Jackson as well).
I was trying to define 2 api endpoints almost equal:
#POST
#Path("/addbook")
#Produces(MediaType.APPLICATION_XML)
#Consumes(MediaType.APPLICATION_XML)
public BookAdvanced addBook (BookAdvanced book){...}
#POST
#Path("/addbook")
#Produces(MediaType.APPLICATION_XML)
#Consumes(MediaType.APPLICATION_XML)
public Book addBook (Book book){...}
Is this possible? What I want is, depending on the xml arriving execute one or the other method
Here book class:
package package1;
import javax.xml.bind.annotation.*;
import java.util.Date;
#XmlRootElement(name = "book")
public class Book {
private Long id;
private String name;
private String author;
#XmlAttribute
public void setId(Long id) {
this.id = id;
}
#XmlElement(name = "title")
public void setName(String name) {
this.name = name;
}
#XmlElement(name = "author")
public void setAuthor(String author) {
this.author = author;
}
public Long getId() {
return id;
}
public String getName() {
return name;
}
public String getAuthor() {
return author;
}
// constructor, getters and setters
}
Here BookAdvanced class:
package package1;
import javax.xml.bind.annotation.*;
import java.util.Date;
#XmlRootElement(name = "book")
public class BookAdvanced {
private Long id;
private String name;
private String author;
private int year;
#XmlAttribute
public void setId(Long id) {
this.id = id;
}
#XmlElement(name = "title")
public void setName(String name) {
this.name = name;
}
#XmlElement(name = "author")
public void setAuthor(String author) {
this.author = author;
}
#XmlElement(name = "year")
public void setYear(int year) {
this.year = year;
}
public Long getId() {
return id;
}
public String getName() {
return name;
}
public String getAuthor() {
return author;
}
public int getYear() {
return year;
}
// constructor, getters and setters
}
27-Jan-2023 12:33:18.238 WARN [http-nio-8080-exec-39] org.jboss.resteasy.core.registry.SegmentNode.match RESTEASY002142: Multiple resource methods match request "POST /hello/addbook". Selecting one. Matching methods: [public package1.BookAdvanced prova_gradle_war.HelloWorldResource.addBook(package1.BookAdvanced), public package1.Book prova_gradle_war.HelloWorldResource.addBook(package1.Book)]
Matching is based on the request URI and not the request body. There is no real way to match the path and decide the method to use based on the body.
You could do something manually where you inspect the data and determine which type to create.
I have a simple Product class as it follows
#SolrDocument(collection = "product")
public class Product {
#Id
#Indexed(name = "id", type = "string")
private String id;
#Field
#Indexed(name = "namex", type = "text_general", stored = false, searchable=true)
private String name;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
my problem is that the annotation #Indexed is completely ignored. The name of the field is simply name (instead of namex) and the field is stored. Any guess?
UPDATE 1 if I remove the type annotation name works, but stored has no effect still
I managed by modifying the bean that creates the SolrTemplate object like follows:
#Bean
public SolrTemplate solrTemplate(SolrClient client) throws Exception {
SolrTemplate st = new SolrTemplate(client);
st.setSchemaCreationFeatures(Collections.singletonList(Feature.CREATE_MISSING_FIELDS));
st.afterPropertiesSet();
return st;
}
Entities and Pojos must have a usable public constructor. You can have an empty constructor or a constructor whose parameters match the fields (by name and type)
Am integrating room into my existing project. While annotating a POJO, which implements Parcelable, with #Entity tag and making necessary changes, am getting this error. I already have an empty constructor in it. Any help would be appreciated.
#Entity(tableName = "Departments")
public class Department implements Parcelable {
#PrimaryKey(autoGenerate = true)
private Integer primaryId;
private Integer id;
private String departmentName;
private String logoUrl;
#Embedded
private ArrayList<Template> templateList;
public Department() {
}
protected Department(Parcel in) {
this.primaryId = (Integer) in.readSerializable();
this.departmentName = in.readString();
this.logoUrl = in.readString();
this.id = (Integer) in.readSerializable();
this.templateList = in.createTypedArrayList(Template.CREATOR);
}
public static final Creator<Department> CREATOR = new Creator<Department>() {
#Override
public Department createFromParcel(Parcel in) {
return new Department(in);
}
#Override
public Department[] newArray(int size) {
return new Department[size];
}
};
#Override
public int describeContents() {
return 0;
}
#Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeSerializable(primaryId);
dest.writeString(departmentName);
dest.writeString(logoUrl);
dest.writeSerializable(id);
dest.writeTypedList(templateList);
}
public Integer getPrimaryId() {
return primaryId;
}
public void setPrimaryId(Integer primaryId) {
this.primaryId = primaryId;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getLogoUrl() {
return logoUrl;
}
public void setLogoUrl(String logoUrl) {
this.logoUrl = logoUrl;
}
public String getDepartmentName() {
return departmentName;
}
public void setDepartmentName(String departmentName) {
this.departmentName = departmentName;
}
public ArrayList<Template> getTemplateList() {
return templateList;
}
public void setTemplateList(ArrayList<Template> templateList) {
this.templateList = templateList;
}
}
#Entity(tableName = "Templates")
public class Template implements Parcelable {
#PrimaryKey(autoGenerate = true)
private Integer primaryId;
private Integer id;
private String code;
private String description;
private Integer departmentId;
#Embedded
private ArrayList<Issue> issueList;
public Template() {
}
private Template(Parcel in) {
this.primaryId = (Integer) in.readSerializable();
this.code = in.readString();
this.description = in.readString();
this.id = (Integer) in.readSerializable();
this.departmentId = (Integer) in.readSerializable();
this.issueList = in.createTypedArrayList(Issue.CREATOR);
}
public static final Creator<Template> CREATOR = new Creator<Template>() {
#Override
public Template createFromParcel(Parcel in) {
return new Template(in);
}
#Override
public Template[] newArray(int size) {
return new Template[size];
}
};
#Override
public int describeContents() {
return 0;
}
#Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeSerializable(primaryId);
dest.writeString(code);
dest.writeString(description);
dest.writeSerializable(id);
dest.writeSerializable(departmentId);
dest.writeTypedList(issueList);
}
public Integer getPrimaryId() {
return primaryId;
}
public void setPrimaryId(Integer primaryId) {
this.primaryId = primaryId;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getCode() {
return code;
}
public void setCode(String code) {
this.code = code;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public ArrayList<Issue> getIssueList() {
return issueList;
}
public void setIssueList(ArrayList<Issue> issueList) {
this.issueList = issueList;
}
public Integer getDepartmentId() {
return departmentId;
}
public void setDepartmentId(Integer departmentId) {
this.departmentId = departmentId;
}
}
#Entity(tableName = "Issues")
public class Issue implements Parcelable {
#PrimaryKey(autoGenerate = true)
private Integer primaryId;
private Integer id;
private String code;
private String description;
private Integer parentIssue;
public Issue() {
}
protected Issue(Parcel in) {
this.primaryId = (Integer) in.readSerializable();
this.code = in.readString();
this.description = in.readString();
this.id = (Integer) in.readSerializable();
this.parentIssue = (Integer) in.readSerializable();
}
public static final Creator<Issue> CREATOR = new Creator<Issue>() {
#Override
public Issue createFromParcel(Parcel in) {
return new Issue(in);
}
#Override
public Issue[] newArray(int size) {
return new Issue[size];
}
};
#Override
public int describeContents() {
return 0;
}
#Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeSerializable(primaryId);
dest.writeString(code);
dest.writeString(description);
dest.writeSerializable(id);
dest.writeSerializable(parentIssue);
}
public Integer getPrimaryId() {
return primaryId;
}
public void setPrimaryId(Integer primaryId) {
this.primaryId = primaryId;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getCode() {
return code;
}
public void setCode(String code) {
this.code = code;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public Integer getParentIssue() {
return parentIssue;
}
public void setParentIssue(Integer parentIssue) {
this.parentIssue = parentIssue;
}
}
Room assumes your entity class will be having only one constructor. But there is no such limitations, If you have multiple constructor then annotate one of them with
#Ignore
Room will ignore this constructor and compile without any error.
Example
#Entity(tableName = "Departments")
public class Department implements Parcelable {
#PrimaryKey(autoGenerate = true)
private Integer primaryId;
private Integer id;
private String departmentName;
private String logoUrl;
#Embedded
private ArrayList<Template> templateList;
/**Room will ignore this constructor
**/
#Ignore
public Department() {
}
protected Department(Parcel in) {
this.primaryId = (Integer) in.readSerializable();
this.departmentName = in.readString();
this.logoUrl = in.readString();
this.id = (Integer) in.readSerializable();
this.templateList = in.createTypedArrayList(Template.CREATOR);
}
}
I'm not sure why you are getting your specific constructor error. That said your code will error from embedding the ArrayList. #Embedded is not meant to be used this way. #Embedded allows you to flatten your POJO structure when storing it. Nested POJO properties will appear as if they had been properties on the parent POJO. Using Embedded on a List is the same as asking it to flatten the properties of the ArrayList object and store them, not flatten the list items and store them.
The appropriate measure is to transition into a foreign key, primary key relationship. An alternative solution is to create a new POJO that contains your list of items (ie Templates, with an 's'). This would contain an ArrayList of Template objects. You would then define a converter that converts the POJO to a json/comma seperated list, and stores it in a single column that by default would be called "templates". Here is a link to this approach :
Android room persistent library - TypeConverter error of error: Cannot figure out how to save field to database"
Hope this helps.
I'm designing a profile page for users where they can edit their personal info. I'm using a PersonViewModel (which contains the current signed in person) to display the current info about the User. The fields to edit the user's info are bound to a validation model. After pressing the 'execute changes' button and I get a response of the server (HTTPStatusCode Ok + the altered user object), I alter the fields of the existing object according to the changes. Then I used setter injection to update my PersonViewModel... When debugging, I can see that my objects are all up-to-date but my view is still displaying the old info... What am I doing wrong?`
This is the code that get's executed when I press the button to execute my changes:
private async void ChangeInfoButton(object sender, RoutedEventArgs e)
{
User user;
List<ErrorInfo> errors;
if (_profileInformationValidationModel.TryGetUser(out user, out errors))
{
var response = await Session.Instance.DataProvider.UpdaterUserInfo(user);
if (response.IsSuccess)
{
/*SignedInUserInfo = AlteredUserInfo*/
Session.Instance.User.Information = user.Information;
_personViewModel.SetPerson(user.Information);
var d1 = new MessageDialog("Uw gegevens werden succesvol gewijzigd.");
d1.ShowAsync();
AnnulInfoButton(sender, e);
}
`
And this is the PersonViewModel:
public class PersonViewModel
{
private Person _person;
public void SetPerson(Person p)
{
_person = p;
}
public PersonViewModel(Person person)
{
_person = person;
}
public string Street
{
get { return _person.Street; }
}
public string HouseNumber
{
get { return _person.HouseNumber; }
}
public string Bus
{
get { return _person.Bus; }
}
public string Email
{
get { return _person.Email; }
}
Your view model should implement the INotifyPropertyChanged interface.
Look into using a framework like MVVM Light which does most of this work for you.
You can add it to your project using NuGet.
This is how your model and view-model should look:
public class Person
{
public string Street { get; set; }
public string HouseNumber { get; set; }
public string Bus { get; set; }
public string Email { get; set; }
}
public class PersonViewModel : System.ComponentModel.INotifyPropertyChanged
{
private Person _person;
public void SetPerson(Person person)
{
_person = person;
Street = person.Street;
HouseNumber = person.HouseNumber;
Bus = person.Bus;
Email = person.Email;
}
public PersonViewModel(Person person)
{
SetPerson(person);
}
#region Street (INotifyPropertyChanged Property)
private string _street;
public string Street
{
get { return _street; }
set
{
if (_street != value)
{
_street = value;
RaisePropertyChanged("Street");
}
}
}
#endregion
#region HouseNumber (INotifyPropertyChanged Property)
private string _houseNumber;
public string HouseNumber
{
get { return _houseNumber; }
set
{
if (_houseNumber != value)
{
_houseNumber = value;
RaisePropertyChanged("HouseNumber");
}
}
}
#endregion
#region Bus (INotifyPropertyChanged Property)
private string _bus;
public string Bus
{
get { return _bus; }
set
{
if (_bus != value)
{
_bus = value;
RaisePropertyChanged("Bus");
}
}
}
#endregion
#region Email (INotifyPropertyChanged Property)
private string _email;
public string Email
{
get { return _email; }
set
{
if (_email != value)
{
_email = value;
RaisePropertyChanged("Email");
}
}
}
#endregion
public event System.ComponentModel.PropertyChangedEventHandler PropertyChanged;
private void RaisePropertyChanged(string p)
{
var propertyChanged = PropertyChanged;
if (propertyChanged != null)
{
propertyChanged(this, new System.ComponentModel.PropertyChangedEventArgs(p));
}
}
}
I'm trying to store an entity called Tshirt into a Windows Azure table storage along with a Blob on Windows Azure Blob storage.
That entity Tshirt contains a field called Image (byte[]) but I don't want to save that in my table.
How can I indicate in my class that I don't want to save that field?
public class Tshirt : TableServiceEntity
{
public Tshirt(string partitionKey, string rowKey, string name)
{
this.PartitionKey = partitionKey;
this.RowKey = rowKey;
this.Name = name;
this.ImageName = new Guid();
}
private string _name;
public string Name
{
get { return _name; }
set { _name = value; }
}
private string _color { get; set; }
public string Color
{
get { return _color; }
set { _color = value; }
}
private int _amount { get; set; }
public int Amount
{
get { return _amount; }
set { _amount = value; }
}
[NonSerialized]
private byte[] _image;
public byte[] Image
{
get { return _image; }
set { _image = value; }
}
private Guid _imageName;
public Guid ImageName
{
get { return _imageName; }
set { _imageName = value; }
}
}
The easy way is to expose the field as a pair of methods rather than an actual property:
public byte[] GetImage()
{
return _image;
}
public void SetImage(byte[] image)
{
_image = image;
}
If that's not an option, then you can remove the Image property when you're storing the entity by handling the WritingEntity event. (Credit to Neil Mackenzie)
public void AddTshirt(Tshirt tshirt)
{
var context = new TableServiceContext(_baseAddress, _credentials);
context.WritingEntity += new EventHandler<ReadingWritingEntityEventArgs>(RemoveImage);
context.AddObject("Tshirt", tshirt);
context.SaveChanges();
}
private void RemoveImage(object sender, ReadingWritingEntityEventArgs args)
{
XNamespace d = "http://schemas.microsoft.com/ado/2007/08/dataservices";
XElement imageElement = args.Data.Descendants(d + "Image").First();
imageElement.Remove();
}