JAXB annotation need to be known to bind xml with my class - binding

I have the following classes
#XmlRootElement(name = "ExecutionRequest")
#XmlAccessorType(XmlAccessType.FIELD)
public class ExecutionRequest {
#XmlElement(name="Command")
private String command;
#XmlElementWrapper(name="ExecutionParameters")
#XmlElement(name="ExecutionParameter")
private ArrayList<ExecutionParameter> ExecutionParameters;
}
#XmlRootElement
#XmlAccessorType(XmlAccessType.FIELD)
public class ExecutionParameter {
#XmlElement(name = "Key")
private String key;
#XmlElement(name = "Value")
private String value;
}
and when I marshall the ExecutionRequest object, I get the following XML -
<ExecutionRequest>
<Command>RetrieveHeader</Command>
<ExecutionParameters>
<ExecutionParameter>
<Key>tid</Key>
<Value>ASTLGA-ALTE010220101</Value>
</ExecutionParameter>
<ExecutionParameter>
<Key>ctag</Key>
<Value>dq</Value>
</ExecutionParameter>
</ExecutionParameters>
</ExecutionRequest>
It is working fine as per JAXB binding.
But I want the XML to have all key value collection within one ExecutionParameter like -
<ExecutionRequest>
<Command>RetrieveHeader</Command>
<ExecutionParameters>
<ExecutionParameter>
<Key>tid</Key>
<Value>ASTLGA-ALTE010220101</Value>
<Key>ctag</Key>
<Value>dq</Value>
</ExecutionParameter>
</ExecutionParameters>
</ExecutionRequest>
Is there any way to obtain xml like this by changing annotation.
Let me know in case of clarifications.
Thanks in advance.

There isn't metadata for that. You could get a compact XML representation (that is easily parseable) by mapping key and value with #XmlAttribute.
<ExecutionParameters>
<ExecutionParameter Key="a" Value="b"/>
<ExecutionParameter Key="c" Value="d"/>
</ExecutionParameters>
UPDATE
If you have to support this XML format, then you could use JAXB with XSLT to get the desired result:
// Create Transformer
TransformerFactory tf = TransformerFactory.newInstance();
StreamSource xslt = new StreamSource(
"src/example/stylesheet.xsl");
Transformer transformer = tf.newTransformer(xslt);
// Source
JAXBContext jc = JAXBContext.newInstance(ExecutionRequest.class);
JAXBSource source = new JAXBSource(jc, request);
// Result
StreamResult result = new StreamResult(System.out);
// Transform
transformer.transform(source, result);
For More Information
http://blog.bdoughan.com/2012/11/using-jaxb-with-xslt-to-produce-html.html

Related

Spring data elastic search long to localdatetime conversion error

I have the following mapping
#Document(indexName = "some-index")
#Data
public class ElasticDocument {
#Id
#Field(type = FieldType.Text)
private String id;
#Field(type = FieldType.Date, format = DateFormat.custom)
#JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "uuuu-MM-dd'T'HH:mm:ss.SSS")
private LocalDateTime issuedTimestamp;
}
The following repository
#Repository
public interface DocumentRepository extends ElasticsearchRepository<ElasticDocument, String> {
}
But the following query from spring data elastic search 4.0.3.RELEASE throws a conversion error:
Page<ElasticDocument> elasticDocuments = documentRepository.findAll(PageRequest.of(0, 10));
[MappingElasticsearchConverter.java:290] [Type LocalDateTime of
property ElasticDocument.issuedTimestamp is a TemporalAccessor
class but has neither a #Field annotation defining the date type nor a
registered converter for reading! It cannot be mapped from a complex
object in Elasticsearch!
[No converter found capable of converting from type [java.lang.Long]
to type [java.time.LocalDateTime]]
[org.springframework.core.convert.ConverterNotFoundException: No
converter found capable of converting from type [java.lang.Long] to
type [java.time.LocalDateTime]
I'm using elasticsearch 7.9.1 and spring data elasticsearch 4.0.3.RELEASE and from what i understood starting with spring data elasticsearch 4.x we don't need to create a custom conversion as long as i added the Field annotation at mapping
You need to add the pattern for your custom format in the #Field annotation
#Field(type = FieldType.Date, format = DateFormat.custom, pattern = "uuuu-MM-dd'T'HH:mm:ss.SSS")
Since spring-data-elastic version 4.2, dateformat.custom is deprecated. You can use any of the enum date_hour_minute_second_xxx in org.springframework.data.elasticsearch.annotations.DateFormat. E.g
#Field(type = FieldType.Date, format = DateFormat.date_hour_minute_second_millis)
private LocalDateTime createdDate;

String constant reference as value of Annotation attribute causes compile error

I am using my properties file to get the values for #Scheduled annotation attributes.I am able to get the values from properties file but when I tries to pass String constant reference to Annotation attribute then compile time exception is raised.
#Slf4j
#CompileStatic
class TestJobService {
static lazyInit = false
public static String jobInterval = getSomePropertiesFileValues?.fixedRateInMS instanceof String? getSomePropertiesFileValues.fixedRateInMS:'10000'
#Scheduled(fixedDelayString = TestJobService.jobInterval)
void executeEveryTenSeconds() {
def date = new Date()
println date.format('yyyy/MM/dd HH:mm', TimeZone.getTimeZone('IST'))
}
}
Attribute 'fixedDelayString' should have type 'java.lang.String'; but
found type 'java.lang.Object' in
#org.springframework.scheduling.annotation.Scheduled
Then I tried to use String to pass like:
#Slf4j
#CompileStatic
class TestJobService {
static lazyInit = false
#Scheduled(fixedDelayString = '${getSomePropertiesFileValues.fixedRateInMS}')
void executeEveryTenSeconds() {
def date = new Date()
println date.format('yyyy/MM/dd HH:mm', TimeZone.getTimeZone('IST'))
}
}
OR
public static final String jobInterval = getSomePropertiesFileValues?.fixedRateInMS instanceof String? getSomePropertiesFileValues.fixedRateInMS:'10000'
prevents the variable from being treated as an inline constant and compiler complains of not being inline constant.
I understand that using single quote '${getSomePropertiesFileValues.fixedRateInMS}'we can get compiler to know that I want GString behaviour. But I don't know is this a bug in Groovy or its a functionality which I need to implement in some other way to pass the string values as annotation attributes. Any lead or any help is highly appreciable.

JsonProvider failed to parse JSON from API written myself

I write an API using springMVC.It's a simple API, I just use it to test JsonProvider.
#ResponseBody
#RequestMapping(value = "/api/test", method = RequestMethod.GET)
public TestClass test(final HttpServletRequest request,
final HttpServletResponse response){
return new TestClass("cc");
}
class TestClass{
public TestClass(){
}
public TestClass(final String name) {
super();
this.name = name;
}
private String name;
public String getName() {
return name;
}
public void setName(final String name) {
this.name = name;
}
}
The API simply returns
But JsonProvider just throws a compile error.
Severity Code Description Project File Line
Error The type provider 'ProviderImplementation.JsonProvider' reported an error: Cannot read sample JSON from 'http://localhost/api/test': Invalid JSON starting at character 0, snippet =
----
"{\"name\":
-----
json =
------
"{\"name\":\"cc\"}"
------- JsonProcess c:\users\xx\documents\visual studio 2015\Projects\JsonProcess\JsonProcess\Program.fs 8
The F# code:
open FSharp.Data
[<Literal>]
let jsonValue = """
{"name":"cc"}
"""
type JsonData = JsonProvider<"http://localhost/api/test">
[<EntryPoint>]
let main argv =
0 // return an integer exit code
Use the String literal jsonValue as sample is ok.type JsonData = JsonProvider<jsonValue>
I checked the FSharp.Data source code (its the function asyncRead) to see how they download the JSON. It basically boils down to this:
let readString =
async {
let contentTypes = [ HttpContentTypes.Json ]
let headers = [
HttpRequestHeaders.UserAgent ("F# Data JSON Type Provider")
HttpRequestHeaders.Accept (String.concat ", " contentTypes)
]
let! text = Http.AsyncRequestString("http://www.kujiale.com/api/askinvitesearch?query=cc", headers = headers)
return text
}
If one runs this code against the url http://www.kujiale.com/api/askinvitesearch?query=cc we see something interesting about what's returned:
"[{\"linkToIdeaBook\":\"/u/3FO4K4UR89F1/huabao\",\"linkToDesi
Note that the content starts with " and that the "strings" are "escaped" with \. So it seems the JSON document is returned as an escaped string. According to json.org the root object must be either an object or array so the parser fails at character 0.
If one switches to contentType HttpContentTypes.Text it starts like this:
[{"linkToIdeaBook":"/u/3FO4K4UR89F1/huabao","linkToDesignCollect":"/u
Which actually turns out to be a valid JSON object.
To me it seems somewhat odd that if you ask for content with content type JSON you get an escaped string but that seems to be the root cause of the failure.
How to resolve it is more difficult to say. One way forward would be a PR to FSharp.Data to allow users to specify the content type used to download content.

Spring data neo4j - replacing provided Date converters with custom converter?

I initially had my #NodeEntity class having a #GraphProperty of java.util.Date type. The graph repository APIs automatically convert that to long / string value and stores it based on my property type.
As I wanted to import huge chunk of data from csv, I wanted this date field in my custom or pre-defined string format, say "yyyyMMdd". So I wrote my spring converter factories for both String -> Date and DAte -> String and registered them in the spring xml for conversion service. But unfortunately my converter was never called. Only the standard converter was called.
Later, when I wrap the date object inside MyDate class and changed the converter to String -> MyDAte and vice versa instead of java.util.Date, converter was called and the required serialization was done.
I dont want this MyDate wrapper around Date just for the sake of converter. Now, my question is, how to override the default date converter with my converters?
try this:
#Configuration
#EnableNeo4jRepositories
static class TestConfig extends Neo4jConfiguration {
#Bean
GraphDatabaseService graphDatabaseService() {
return new ImpermanentGraphDatabase();
}
#Bean
protected ConversionService neo4jConversionService() throws Exception {
ConversionService conversionService = super.neo4jConversionService();
ConverterRegistry registry = (ConverterRegistry) conversionService;
registry.removeConvertible(Date.class, String.class);
registry.removeConvertible(String.class, Date.class);
//add your own converters like this
registry.addConverter(new MyDateToStringConverter());
registry.addConverter(new MyStringToDateConverter());
return conversionService;
}
}

F# - POCO Class

Hey there! I'm trying to write a POCO class in proper F#... But something is wrong..
The C# code that I want to "translate" to proper F# is:
public class MyTest
{
[Key]
public int ID { get; set; }
public string Name { get; set; }
}
The closest I can come to the above code in F# is something like:
type Mytest() =
let mutable _id : int = 0;
let mutable _name : string = null;
[<KeyAttribute>]
member x.ID
with public get() : int = _id
and public set(value) = _id <- value
member x.Name
with public get() : string = _name
and public set value = _name <- value
However when I try to access the properties of the F# version it just returns a compile error saying
"Lookup on object of indeterminate type based on information prior to this program point. A type annotation may be needed prior to this program point to constrain the type of the object. This may allow the lookup to be resolved."
The code thats trying to get the property is a part of my Repository (I'm using EF Code First).
module Databasethings =
let GetEntries =
let ctx = new SevenContext()
let mydbset = ctx.Set<MyTest>()
let entries = mydbset.Select(fun item -> item.Name).ToList() // This line comes up with a compile error at "item.Name" (the compile error is written above)
entries
What the hell is going on?
Thanks in advance!
Your class definition is fine, it's your LINQ that has a problem. The Select method is expecting an argument of type Expression<Func<MyTest,T>> but you're passing it a value of type FSharpFunc<MyTest,T> - or something similar to that anyway.
The point is you can't use F# lambda expressions directly with LINQ. You need to write your expression as an F# Quotation and then use the F# PowerPack to run the code against an IQueryable<> data source. Don Syme has a good overview of how this works.

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