This might be a duplicate. But I cannot find a solution to my Problem.
I have a class
public class MyResponse implements Serializable {
private boolean isSuccess;
public boolean isSuccess() {
return isSuccess;
}
public void setSuccess(boolean isSuccess) {
this.isSuccess = isSuccess;
}
}
Getters and setters are generated by Eclipse.
In another class, I set the value to true, and write it as a JSON string.
System.out.println(new ObjectMapper().writeValueAsString(myResponse));
In JSON, the key is coming as {"success": true}.
I want the key as isSuccess itself. Is Jackson using the setter method while serializing? How do I make the key the field name itself?
This is a slightly late answer, but may be useful for anyone else coming to this page.
A simple solution to changing the name that Jackson will use for when serializing to JSON is to use the #JsonProperty annotation, so your example would become:
public class MyResponse implements Serializable {
private boolean isSuccess;
#JsonProperty(value="isSuccess")
public boolean isSuccess() {
return isSuccess;
}
public void setSuccess(boolean isSuccess) {
this.isSuccess = isSuccess;
}
}
This would then be serialised to JSON as {"isSuccess":true}, but has the advantage of not having to modify your getter method name.
Note that in this case you could also write the annotation as #JsonProperty("isSuccess") as it only has the single value element
I recently ran into this issue and this is what I found. Jackson will inspect any class that you pass to it for getters and setters, and use those methods for serialization and deserialization. What follows "get", "is" and "set" in those methods will be used as the key for the JSON field ("isValid" for getIsValid and setIsValid).
public class JacksonExample {
private boolean isValid = false;
public boolean getIsValid() {
return isValid;
}
public void setIsValid(boolean isValid) {
this.isValid = isValid;
}
}
Similarly "isSuccess" will become "success", unless renamed to "isIsSuccess" or "getIsSuccess"
Read more here: http://www.citrine.io/blog/2015/5/20/jackson-json-processor
Using both annotations below, forces the output JSON to include is_xxx:
#get:JsonProperty("is_something")
#param:JsonProperty("is_something")
When you are using Kotlin and data classes:
data class Dto(
#get:JsonProperty("isSuccess") val isSuccess: Boolean
)
You might need to add #param:JsonProperty("isSuccess") if you are going to deserialize JSON as well.
EDIT: If you are using swagger-annotations to generate documentation, the property will be marked as readOnly when using #get:JsonProperty. In order to solve this, you can do:
#JsonAutoDetect(isGetterVisibility = JsonAutoDetect.Visibility.NONE)
data class Dto(
#field:JsonProperty(value = "isSuccess") val isSuccess: Boolean
)
You can configure your ObjectMapper as follows:
mapper.setPropertyNamingStrategy(new PropertyNamingStrategy() {
#Override
public String nameForGetterMethod(MapperConfig<?> config, AnnotatedMethod method, String defaultName)
{
if(method.hasReturnType() && (method.getRawReturnType() == Boolean.class || method.getRawReturnType() == boolean.class)
&& method.getName().startsWith("is")) {
return method.getName();
}
return super.nameForGetterMethod(config, method, defaultName);
}
});
I didn't want to mess with some custom naming strategies, nor re-creating some accessors.
The less code, the happier I am.
This did the trick for us :
import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
import com.fasterxml.jackson.annotation.JsonProperty;
#JsonIgnoreProperties({"success", "deleted"}) // <- Prevents serialization duplicates
public class MyResponse {
private String id;
private #JsonProperty("isSuccess") boolean isSuccess; // <- Forces field name
private #JsonProperty("isDeleted") boolean isDeleted;
}
Building upon Utkarsh's answer..
Getter names minus get/is is used as the JSON name.
public class Example{
private String radcliffe;
public getHarryPotter(){
return radcliffe;
}
}
is stored as { "harryPotter" : "whateverYouGaveHere" }
For Deserialization, Jackson checks against both the setter and the field name.
For the Json String { "word1" : "example" }, both the below are valid.
public class Example{
private String word1;
public setword2( String pqr){
this.word1 = pqr;
}
}
public class Example2{
private String word2;
public setWord1(String pqr){
this.word2 = pqr ;
}
}
A more interesting question is which order Jackson considers for deserialization. If i try to deserialize { "word1" : "myName" } with
public class Example3{
private String word1;
private String word2;
public setWord1( String parameter){
this.word2 = parameter ;
}
}
I did not test the above case, but it would be interesting to see the values of word1 & word2 ...
Note: I used drastically different names to emphasize which fields are required to be same.
You can change primitive boolean to java.lang.Boolean (+ use #JsonPropery)
#JsonProperty("isA")
private Boolean isA = false;
public Boolean getA() {
return this.isA;
}
public void setA(Boolean a) {
this.isA = a;
}
Worked excellent for me.
If you are interested in handling 3rd party classes not under your control (like #edmundpie mentioned in a comment) then you add Mixin classes to your ObjectMapper where the property/field names should match the ones from your 3rd party class:
public class MyStack32270422 {
public static void main(String[] args) {
ObjectMapper om3rdParty = new ObjectMapper();
om3rdParty .addMixIn(My3rdPartyResponse.class, MixinMyResponse.class);
// add further mixins if required
String jsonString = om3rdParty.writeValueAsString(new My3rdPartyResponse());
System.out.println(jsonString);
}
}
class MixinMyResponse {
// add all jackson annotations here you want to be used when handling My3rdPartyResponse classes
#JsonProperty("isSuccess")
private boolean isSuccess;
}
class My3rdPartyResponse{
private boolean isSuccess = true;
// getter and setter here if desired
}
Basically you add all your Jackson annotations to your Mixin classes as if you would own the class. In my opinion quite a nice solution as you don't have to mess around with checking method names starting with "is.." and so on.
there is another method for this problem.
just define a new sub-class extends PropertyNamingStrategy and pass it to ObjectMapper instance.
here is a code snippet may be help more:
mapper.setPropertyNamingStrategy(new PropertyNamingStrategy() {
#Override
public String nameForGetterMethod(MapperConfig<?> config, AnnotatedMethod method, String defaultName) {
String input = defaultName;
if(method.getName().startsWith("is")){
input = method.getName();
}
//copy from LowerCaseWithUnderscoresStrategy
if (input == null) return input; // garbage in, garbage out
int length = input.length();
StringBuilder result = new StringBuilder(length * 2);
int resultLength = 0;
boolean wasPrevTranslated = false;
for (int i = 0; i < length; i++)
{
char c = input.charAt(i);
if (i > 0 || c != '_') // skip first starting underscore
{
if (Character.isUpperCase(c))
{
if (!wasPrevTranslated && resultLength > 0 && result.charAt(resultLength - 1) != '_')
{
result.append('_');
resultLength++;
}
c = Character.toLowerCase(c);
wasPrevTranslated = true;
}
else
{
wasPrevTranslated = false;
}
result.append(c);
resultLength++;
}
}
return resultLength > 0 ? result.toString() : input;
}
});
The accepted answer won't work for my case.
In my case, the class is not owned by me. The problematic class comes from 3rd party dependencies, so I can't just add #JsonProperty annotation in it.
To solve it, inspired by #burak answer above, I created a custom PropertyNamingStrategy as follow:
mapper.setPropertyNamingStrategy(new PropertyNamingStrategy() {
#Override
public String nameForSetterMethod(MapperConfig<?> config, AnnotatedMethod method, String defaultName)
{
if (method.getParameterCount() == 1 &&
(method.getRawParameterType(0) == Boolean.class || method.getRawParameterType(0) == boolean.class) &&
method.getName().startsWith("set")) {
Class<?> containingClass = method.getDeclaringClass();
String potentialFieldName = "is" + method.getName().substring(3);
try {
containingClass.getDeclaredField(potentialFieldName);
return potentialFieldName;
} catch (NoSuchFieldException e) {
// do nothing and fall through
}
}
return super.nameForSetterMethod(config, method, defaultName);
}
#Override
public String nameForGetterMethod(MapperConfig<?> config, AnnotatedMethod method, String defaultName)
{
if(method.hasReturnType() && (method.getRawReturnType() == Boolean.class || method.getRawReturnType() == boolean.class)
&& method.getName().startsWith("is")) {
Class<?> containingClass = method.getDeclaringClass();
String potentialFieldName = method.getName();
try {
containingClass.getDeclaredField(potentialFieldName);
return potentialFieldName;
} catch (NoSuchFieldException e) {
// do nothing and fall through
}
}
return super.nameForGetterMethod(config, method, defaultName);
}
});
Basically what this does is, before serializing and deserializing, it checks in the target/source class which property name is present in the class, whether it is isEnabled or enabled property.
Based on that, the mapper will serialize and deserialize to the property name that is exist.
I'm new to vue.js. I've tried this way to compare two strings, but it seems to fail in vue. How can I solve this issue?
I've tried this:
app.vue
#Component
export default class Game extends Vue{
public word = ""
public words: Array<string> = ["hello", "world"]
public checkValue(): void{
const firstWord = this.words.shift();
if(firstWord === this.word){ // this condition is failing
console.log("Success")
}
}
}
app.html
<md-input v-on:keyup.space="checkValue()" v-model="word"></md-input>
Why this condition is failing?
Because you have an event keyup with space so word always have a space at end. Please trim before compare.
#Component
export default class Game extends Vue{
public word = ""
public words: Array<string> = ["hello", "world"]
public checkValue(): void{
const firstWord = this.words.shift();
if(firstWord === this.word.trim()) {
console.log("Success")
}
}
}
change the below block of code, it should solve your issue
if (firstWord === this.word.trim()) {
// to do
console.log("Success");
}
actually this.word always containing a space with your given word into input box. thats why it will never match. so you have to trim the given input word.
you can check the result
below is an extract from a Step Definition class of my Specflow project.
In the first method public void WhenIExtractTheReferenceNumber() I can successfully extract the text from the application under test, and I have proved this using the Console.WriteLine();
I need to be able to use this text in other methods with in my class I.e. public void WhenIPrintNumber(); But I'm not sure how to do this!
I read about Get/Set but I could not get this working. So I'm thinking is it possible to make my var result global somehow, so that I can call it at anytime during the test?
namespace Application.Tests.StepDefinitions
{
[Binding]
public class AllSharedSteps
{
[When(#"I extract the reference number")]
public void WhenIExtractTheReferenceNumber()
{
Text textCaseReference = ActiveCase.CaseReferenceNumber;
Ranorex.Core.Element elem = textCaseReference;
var result = elem.GetAttributeValue("Text");
Console.WriteLine(result);
}
[When(#"I print number")]
public void WhenIPrintNumber()
{
Keyboard.Press(result);
}
}
}
Thanks in advance for any thoughts.
Here is the solution to my question. Now I can access my variable(s) from any methods within my class. I have also included code that I'm using to split my string and then use the first part of the string. In my case I need the numerical part of '12345 - some text':
namespace Application.Tests.StepDefinitions
{
[Binding]
public class AllSharedSteps
{
private string result;
public Array splitReference;
[When(#"I extract the case reference number")]
public void WhenIExtractTheCaseReferenceNumber()
{
Text textCaseReference = ActiveCase.CaseReferenceNumber;
Ranorex.Core.Element elem = textCaseReference;
result = elem.GetAttributeValue("Text").ToString();
splitReference = result.Split('-'); // example of string to be split '12345 - some text'
Console.WriteLine(splitReference.GetValue(0).ToString().Trim());
}
[When(#"I print number")]
public void WhenIPrintNumber()
{
Keyboard.Press(result); // prints full string
Keyboard.Press(splitReference.GetValue(0).ToString()); // prints first part of string i.e. in this case, a reference number
}
}
}
I hope this help somebody else :)
I have a class named BMW defined in BMW.ts as follows:
///<reference path="../Thing.ts"/>
module Entities.Cars {
import e = Entities;
export class BMW extends Vehicle {
public series: string;
constructor ( model : string, series : string) {
super("BMW", model)
this.series = series;
}
drive() {
alert("driving a bimmer is a different kind of feeling");
}
toString() : string
{
return this.getName() + " " + this.series + " " + this.getType();
}
}
}
In another file Thing.ts, I have Vehicle and Thing classes defined as follows:
module Entities {
// Class
export class Thing {
private _name: string;
private _type: string;
// Constructor
constructor (public name: string, public type: string) {
this._name = name;
this._type = type;
}
getName(): string { return this._name; }
setName(name: string) { this._name = name; }
getType(): string { return this._type; }
setType(name: string) {
this._type = name;
}
toString() : string
{
return "Entities.Thing";
}
}
export class Vehicle extends Thing {
public cargoCapacity: number;
public fuelType: string;
public owner: string;
constructor (make: string, model : string) {
super(make, model)
}
drive() {
}
toString(): string {
return "Entities.Vehicle";
}
}
}
When I attempt to execute the following code after referencing Thing and BMW TypeScript files:
var car = new Entities.Cars.BMW("335i", "E90");
car.drive();
I get an exception with the following error " Microsoft JScript runtime error: Unable to get value of the property 'BMW': object is null or undefined". The generated Javascript for BMW has an error. What is wrong with my above snippet?
There is nothing wrong with your code so it seems like your import order for the generated javascript files is wrong. The specification says the following:
Initialization order of the source files that make up the global module ultimately depends on the order in which the generated JavaScript files are loaded at run-time (which, for example, may be controlled by tags that reference the generated JavaScript files).
I have generated a file app.ts as follows:
///<reference path='Things.ts'/>
///<reference path='bmw/BMW.ts'/>
var car = new Entities.Cars.BMW("335i", "E90");
car.drive();
At this point you have two options:
Let the compiler determine the correct order for executing the files by generating a single output file
tsc --out app.js app.ts
Then you only have to source app.js.
Specify the correct order manually. For me, the following is the only order that works without throwing errors.
<html>
<head>
<script src="Things.js"></script>
<script src="bmw/BMW.js"></script>
<script src="app.js"></script>
</head>
<body>
</body>
</html>
Your code is fine.
My guess is that you are not placing script tags in your head element properly(wrong order, or ommitting some).
The simplest way to solve this, and to not have to remember about proper declaration sequence is to use single .js output file from tsc compiler by setting --out option.
EDIT: Depending on which js scenario you are working on(WSH, web app or some other js environment), you need to link js source files differently.
With wsh for instance, you could use FileSystemObject to read a source file, then evaluate it.
Or you could use AMDs...
I have a simple bean, like that:
package models;
import play.data.validation.Constraints;
public class Upload
{
#Constraints.Required
#Constraints.MinLength(4)
#Constraints.MaxLength(40)
public String name;
#Constraints.Required
public String inputFile;
}
and form, like that:
#form(action = routes.Application.submit(), 'enctype -> "multipart/form-data") {
#inputText(
uploadForm("name"),
'_label -> "Name"
)
#inputFile(
uploadForm("inputFile"),
'_label -> "Queries"
)
}
What is the best way to validate inputFile?
Is it possible do to that with annotations?
#Required constraint does not work at all.
I want it to be selected + add some limitation on size.
make your form like:
<input type="file" name="inputFile">
In you submit method add this:
// from official documentation
public static Result submit() {
MultipartFormData body = request().body().asMultipartFormData();
FilePart file = body.getFile("inputFile");
if (inputFile != null) {
String fileName = picture.getFilename();
String contentType = picture.getContentType();
File file = picture.getFile();
// method the check size
if(!validateFileSize){
return redirect(routes.Application.index()); // error in file size
}
return ok("File uploaded");
} else {
// here comes the validation
flash("error", "Missing file");
return redirect(routes.Application.index());
}
}
Something like the following, maybe?
MultipartFormData body = request().body().asMultipartFormData();
if (!body.getFiles().isEmpty()) {
// do your work
}