springlets | Springlets provides a series of heterogeneus | Object-Relational Mapping library

Failed to convert property value of type [java.lang.String] to required type [com.myapp.domain.Product] for property product; nested exception is 
org.springframework.core.convert.ConversionFailedException: Failed to convert from type [java.lang.String] to type [@javax.persistence.OneToOne 
 @io.springlets.format.EntityFormat com.myapp.domain.Product] for value 2500; nested exception is java.lang.IllegalStateException: Parsers are not allowed to return null: io.springlets.format.EntityParser@2201ba1c

@GetMapping(produces = MediaType.APPLICATION_JSON_VALUE, name = "select2", value = "/s2")
@ResponseBody
public ResponseEntity> select2(GlobalSearch search, Pageable pageable,
        Locale locale) {
    Page products = getProductService().findAll(search, pageable);
    String idExpression = "#{id}";
    Select2DataSupport select2Data =
            new Select2DataWithConversion(products, idExpression, getConversionService());
    return ResponseEntity.ok(select2Data);
}

@PostMapping(name = "create")
public ModelAndView create(@Valid @ModelAttribute Order order, BindingResult result,
        Model model) {
    if (result.hasErrors()) {
        populateForm(model);
        return new ModelAndView("/order/create");
    }

    Order newOrder = getOrderService().save(order);
    UriComponents showURI = getItemLink().to(OrderItemThymeleafLinkFactory.SHOW)
            .with("order", newOrder.getId()).toUri();
    return new ModelAndView("redirect:" + showURI.toUriString());
}

    
        
            Product
            
                
                
                    Product
                
                
                Error message.
            
        
        
    

@RooJavaBean
@RooToString
@RooJpaEntity
@RooEquals(isJpaEntity = true)
@Entity
@EntityFormat
public class Product {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    private String productName;

    @Min(1L)
    @NumberFormat
    private Integer price;

    @OneToOne(fetch = FetchType.LAZY)
    @EntityFormat
    private Order order;

    public static final String ITERABLE_TO_ADD_CANT_BE_NULL_MESSAGE = "The given Iterable of items to add can't be null!";

    public static final String ITERABLE_TO_REMOVE_CANT_BE_NULL_MESSAGE = "The given Iterable of items to add can't be null!";

    public Long getId() {
        return this.id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public Integer getPrice() {
        return this.price;
    }

    public void setPrice(Integer price) {
        this.price = price;
    }

    public String getProductName() {
        return this.productName;
    }

    public void setProductName(String productName) {
        this.productName = productName;
    }

    public Order getOrder() {
        return this.order;
    }

    public void setOrder(Order order) {
        this.order= order;
    }
}

@RooJavaBean
@RooToString
@RooJpaEntity
@RooEquals(isJpaEntity = true)
@Entity
@EntityFormat
public class Order {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    @Version
    private Integer version;

    @OneToOne(cascade = { javax.persistence.CascadeType.MERGE,
        javax.persistence.CascadeType.PERSIST }, fetch = FetchType.LAZY, mappedBy = "order")
    @RooJpaRelation(type = JpaRelationType.AGGREGATION)
    @EntityFormat
    private Product product;

    public static final String ITERABLE_TO_ADD_CANT_BE_NULL_MESSAGE = "The given Iterable of items to add can't be null!";

    public static final String ITERABLE_TO_REMOVE_CANT_BE_NULL_MESSAGE = "The given Iterable of items to add can't be null!";

    /**
    * This `equals` implementation is specific for JPA entities and uses the
    * entity identifier for it, following the article in
    * https://vladmihalcea.com/2016/06/06/how-to-implement-equals-and-hashcode-using-the-jpa-entity-identifier/
    *
    * @param obj
    * @return Boolean
    */
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        // instanceof is false if the instance is null
        if (!(obj instanceof Order)) {
            return false;
        }
        return getId() != null && Objects.equals(getId(), ((Order) obj).getId());
    }

    /**
    * This `hashCode` implementation is specific for JPA entities and uses a
    * fixed `int` value to be able to identify the entity in collections after
    * a new id is assigned to the entity, following the article in
    * https://vladmihalcea.com/2016/06/06/how-to-implement-equals-and-hashcode-using-the-jpa-entity-identifier/
    *
    * @return Integer
    */
    public int hashCode() {
        return 31;
    }

    public Long getId() {
        return this.id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public Integer getVersion() {
        return this.version;
    }

    public void setVersion(Integer version) {
        this.version = version;
    }

    public Product getProduct() {
        return this.product;
    }

    public void setProduct(Product product) {
        this.product = product;
    }

    public void addToProduct(Product product) {
        if (product == null) {
            removeFromProduct();
        } else {
            this.product = product;
            product.setOrder(this);
        }
    }

    public void removeFromProduct() {
        if (this.product != null) {
            product.setOrder(null);
        }
        this.product = null;
    }
}

entity jpa --class ~.domain.Pet --sequenceName PET_SEQ --entityFormatExpression "#{name} (#{type}) birthDay: #{birthDay}"
field date --fieldName birthDay --type java.util.Calendar --notNull --dateTimeFormatPattern "dd.MM.yyyy"

2017-03-22 10:43:55.738  WARN - QP: - 6424 --- [io-8082-exec-10] .w.s.m.s.DefaultHandlerExceptionRes
olver : Failed to write HTTP message: org.springframework.http.converter.HttpMessageNotWritableExcep
tion: Could not write content: Failed to convert from type [org.springframework.roo.petclinic.domain
.Pet] to type [java.lang.String] for value 'Pet {id='1', version='0', sendReminders='false', name='M
imi', weight='4.5', birthDay='java.util.GregorianCalendar[time=1490137200000,areFieldsSet=true,areAl
lFieldsSet=true,lenient=true,zone=sun.util.calendar.ZoneInfo[id="Europe/Berlin",offset=3600000,dstSa
vings=3600000,useDaylight=true,transitions=143,lastRule=java.util.SimpleTimeZone[id=Europe/Berlin,of
fset=3600000,dstSavings=3600000,useDaylight=true,startYear=0,startMode=2,startMonth=2,startDay=-1,st
artDayOfWeek=1,startTime=3600000,startTimeMode=2,endMode=2,endMonth=9,endDay=-1,endDayOfWeek=1,endTi
me=3600000,endTimeMode=2]],firstDayOfWeek=2,minimalDaysInFirstWeek=4,ERA=1,YEAR=2017,MONTH=2,WEEK_OF
_YEAR=12,WEEK_OF_MONTH=4,DAY_OF_MONTH=22,DAY_OF_YEAR=81,DAY_OF_WEEK=4,DAY_OF_WEEK_IN_MONTH=4,AM_PM=0
,HOUR=0,HOUR_OF_DAY=0,MINUTE=0,SECOND=0,MILLISECOND=0,ZONE_OFFSET=3600000,DST_OFFSET=0]', ITERABLE_T
O_ADD_CANT_BE_NULL_MESSAGE='The given Iterable of items to add can't be null!', ITERABLE_TO_REMOVE_C
ANT_BE_NULL_MESSAGE='The given Iterable of items to add can't be null!'}org.springframework.roo.petc
linic.domain.Pet@1f'; nested exception is org.springframework.expression.spel.SpelEvaluationExceptio
n: EL1001E:(pos 0): Type conversion problem, cannot convert from @javax.validation.constraints.NotNu
ll @javax.persistence.Temporal @org.springframework.format.annotation.DateTimeFormat java.util.Grego
rianCalendar to java.lang.String (through reference chain: io.springlets.data.web.select2.Select2Dat
aWithConversion["results"]); nested exception is com.fasterxml.jackson.databind.JsonMappingException
: Failed to convert from type [org.springframework.roo.petclinic.domain.Pet] to type [java.lang.Stri
ng] for value 'Pet {id='1', version='0', sendReminders='false', name='Mimi', weight='4.5', birthDay=
'java.util.GregorianCalendar[time=1490137200000,areFieldsSet=true,areAllFieldsSet=true,lenient=true,
zone=sun.util.calendar.ZoneInfo[id="Europe/Berlin",offset=3600000,dstSavings=3600000,useDaylight=tru
e,transitions=143,lastRule=java.util.SimpleTimeZone[id=Europe/Berlin,offset=3600000,dstSavings=36000
00,useDaylight=true,startYear=0,startMode=2,startMonth=2,startDay=-1,startDayOfWeek=1,startTime=3600
000,startTimeMode=2,endMode=2,endMonth=9,endDay=-1,endDayOfWeek=1,endTime=3600000,endTimeMode=2]],fi
rstDayOfWeek=2,minimalDaysInFirstWeek=4,ERA=1,YEAR=2017,MONTH=2,WEEK_OF_YEAR=12,WEEK_OF_MONTH=4,DAY_
OF_MONTH=22,DAY_OF_YEAR=81,DAY_OF_WEEK=4,DAY_OF_WEEK_IN_MONTH=4,AM_PM=0,HOUR=0,HOUR_OF_DAY=0,MINUTE=
0,SECOND=0,MILLISECOND=0,ZONE_OFFSET=3600000,DST_OFFSET=0]', ITERABLE_TO_ADD_CANT_BE_NULL_MESSAGE='T
he given Iterable of items to add can't be null!', ITERABLE_TO_REMOVE_CANT_BE_NULL_MESSAGE='The give
n Iterable of items to add can't be null!'}org.springframework.roo.petclinic.domain.Pet@1f'; nested
exception is org.springframework.expression.spel.SpelEvaluationException: EL1001E:(pos 0): Type conv
ersion problem, cannot convert from @javax.validation.constraints.NotNull @javax.persistence.Tempora
l @org.springframework.format.annotation.DateTimeFormat java.util.GregorianCalendar to java.lang.Str
ing (through reference chain: io.springlets.data.web.select2.Select2DataWithConversion["results"])
2017-03-22 10:43:55.754  WARN - QP: - 6424 --- [io-8082-exec-10] .w.s.m.s.DefaultHandlerExceptionRes
olver : Resolved exception caused by Handler execution: org.springframework.http.converter.HttpMessa
geNotWritableException: Could not write content: Failed to convert from type [org.springframework.ro
o.petclinic.domain.Pet] to type [java.lang.String] for value 'Pet {id='1', version='0', sendReminder
s='false', name='Mimi', weight='4.5', birthDay='java.util.GregorianCalendar[time=1490137200000,areFi
eldsSet=true,areAllFieldsSet=true,lenient=true,zone=sun.util.calendar.ZoneInfo[id="Europe/Berlin",of
fset=3600000,dstSavings=3600000,useDaylight=true,transitions=143,lastRule=java.util.SimpleTimeZone[i
d=Europe/Berlin,offset=3600000,dstSavings=3600000,useDaylight=true,startYear=0,startMode=2,startMont
h=2,startDay=-1,startDayOfWeek=1,startTime=3600000,startTimeMode=2,endMode=2,endMonth=9,endDay=-1,en
dDayOfWeek=1,endTime=3600000,endTimeMode=2]],firstDayOfWeek=2,minimalDaysInFirstWeek=4,ERA=1,YEAR=20
17,MONTH=2,WEEK_OF_YEAR=12,WEEK_OF_MONTH=4,DAY_OF_MONTH=22,DAY_OF_YEAR=81,DAY_OF_WEEK=4,DAY_OF_WEEK_
IN_MONTH=4,AM_PM=0,HOUR=0,HOUR_OF_DAY=0,MINUTE=0,SECOND=0,MILLISECOND=0,ZONE_OFFSET=3600000,DST_OFFS
ET=0]', ITERABLE_TO_ADD_CANT_BE_NULL_MESSAGE='The given Iterable of items to add can't be null!', IT
ERABLE_TO_REMOVE_CANT_BE_NULL_MESSAGE='The given Iterable of items to add can't be null!'}org.spring
framework.roo.petclinic.domain.Pet@1f'; nested exception is org.springframework.expression.spel.Spel
EvaluationException: EL1001E:(pos 0): Type conversion problem, cannot convert from @javax.validation
.constraints.NotNull @javax.persistence.Temporal @org.springframework.format.annotation.DateTimeForm
at java.util.GregorianCalendar to java.lang.String (through reference chain: io.springlets.data.web.
select2.Select2DataWithConversion["results"]); nested exception is com.fasterxml.jackson.databind.Js
onMappingException: Failed to convert from type [org.springframework.roo.petclinic.domain.Pet] to ty
pe [java.lang.String] for value 'Pet {id='1', version='0', sendReminders='false', name='Mimi', weigh
t='4.5', birthDay='java.util.GregorianCalendar[time=1490137200000,areFieldsSet=true,areAllFieldsSet=
true,lenient=true,zone=sun.util.calendar.ZoneInfo[id="Europe/Berlin",offset=3600000,dstSavings=36000
00,useDaylight=true,transitions=143,lastRule=java.util.SimpleTimeZone[id=Europe/Berlin,offset=360000
0,dstSavings=3600000,useDaylight=true,startYear=0,startMode=2,startMonth=2,startDay=-1,startDayOfWee
k=1,startTime=3600000,startTimeMode=2,endMode=2,endMonth=9,endDay=-1,endDayOfWeek=1,endTime=3600000,
endTimeMode=2]],firstDayOfWeek=2,minimalDaysInFirstWeek=4,ERA=1,YEAR=2017,MONTH=2,WEEK_OF_YEAR=12,WE
EK_OF_MONTH=4,DAY_OF_MONTH=22,DAY_OF_YEAR=81,DAY_OF_WEEK=4,DAY_OF_WEEK_IN_MONTH=4,AM_PM=0,HOUR=0,HOU
R_OF_DAY=0,MINUTE=0,SECOND=0,MILLISECOND=0,ZONE_OFFSET=3600000,DST_OFFSET=0]', ITERABLE_TO_ADD_CANT_
BE_NULL_MESSAGE='The given Iterable of items to add can't be null!', ITERABLE_TO_REMOVE_CANT_BE_NULL
_MESSAGE='The given Iterable of items to add can't be null!'}org.springframework.roo.petclinic.domai
n.Pet@1f'; nested exception is org.springframework.expression.spel.SpelEvaluationException: EL1001E:
(pos 0): Type conversion problem, cannot convert from @javax.validation.constraints.NotNull @javax.p
ersistence.Temporal @org.springframework.format.annotation.DateTimeFormat java.util.GregorianCalenda
r to java.lang.String (through reference chain: io.springlets.data.web.select2.Select2DataWithConver
sion["results"])

entity jpa --class ~.domain.Pet --sequenceName PET_SEQ --entityFormatExpression "#{name} (#{type}) birthDay: #{birthDay}"

focus --class ~.domain.Pet
field date --fieldName birthDay --type java.util.Date --notNull --dateTimeFormatPattern "dd.MM.yyyy"

entity jpa --class ~.model.User --plural Users --table USER --sequenceName USER_ID_SEQ --identifierStrategy AUTO --identifierColumn USER_ID --versionField version --versionType java.lang.Long --versionColumn VERSION --entityFormatExpression "User: #{firstname} #{lastname} (#{username})"
entity jpa --class ~.model.Role --plural Roles --table ROLE --sequenceName ROLE_ID_SEQ --identifierStrategy AUTO --identifierColumn ROLE_ID --versionField version --versionType java.lang.Long --versionColumn VERSION --entityFormatExpression "#{rolename}"

focus --class ~.model.User
field string --fieldName username --column USERNAME --notNull --unique --comment "Username des Nutzers" --regexp ^[a-zA-Z0-9_]{4,}$ 
field string --fieldName password --column PASSWORD --notNull --comment "Passwort des Nutzers" --regexp ^(?=.*\d)(?=.*[a-z])(?=.*[A-Z])[a-zA-Z0-9]{6,}$
field string --fieldName firstname --column FIRST_NAME --notNull --comment "Vorname des Nutzers"
field string --fieldName lastname --column LAST_NAME --notNull  --comment "Nachname des Nutzers"
field string --fieldName email --column EMAIL --notNull --unique --comment "Email des Nutzers" --regexp ^[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+$
focus --class ~.model.Role
field enum --fieldName rolename --column ROLENAME --type ~.model.restricted.RoleType --notNull --comment "Rollentyp"
field set --fieldName userlst --type ~.model.User --mappedBy role --joinColumnName ROLE_ID --permitReservedWords --comment "Liste der User mit diesem Typ"

import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;

@Configuration
@EnableWebSecurity
public class SecurityConfiguration extends WebSecurityConfigurerAdapter {

    @Override
    protected void configure(HttpSecurity httpSecurity) throws Exception {
        httpSecurity.authorizeRequests().antMatchers("/").permitAll();
    }

}

2017-03-30 09:12:55.088  WARN 6644 --- [nio-8082-exec-7] .w.s.m.s.DefaultHandlerExceptionResolver :
Resolved exception caused by Handler execution: org.springframework.http.converter.HttpMessageNotWri
tableException: Could not write content: No converter found capable of converting from type [de.quin
tra.rechnungspruefung.model.Role] to type [java.lang.String] (through reference chain: io.springlets
.data.web.select2.Select2DataWithConversion["results"]); nested exception is com.fasterxml.jackson.d
atabind.JsonMappingException: No converter found capable of converting from type [de.quintra.rechnun
gspruefung.model.Role] to type [java.lang.String] (through reference chain: io.springlets.data.web.s
elect2.Select2DataWithConversion["results"])