I have this model:
#Getter
#Setter
#NoArgsConstructor
#AllArgsConstructor
#Document(collection = "dyn_fields")
public class Field<T extends Object> extends AuditModel implements Serializable{
private static final long serialVersionUID = -6630923680212053917L;
#Id
private String id;
private ObjectId companyId;
private T value;
private String label;
private LocalDate validationDate;
public Field(T value) {
this.value = value;
}
}
the Value field can be of any type: String, Integer, Double and c ...
the insertion in the mongodb database works correctly as shown in the image:
how can I do a mapping of my records not knowing the type of the value field?
I'm currently casting all fields, I don't think that's the correct procedure.
You can use instanceof to evaluate the type of the property.
example
if(value instanceof String) {
// String mapping logic
}
if(value instanceof Integer) {
// Integer mapping logic
}
Related
The main purpose is to read a stream from a topic, apply some transformations and then send two events to other topics. For that we are using Kstream.branch() function and using functional style programming. The code is:
Input POJO:
#Data
#NoArgsConstructor
#AllArgsConstructor
#JsonInclude(JsonInclude.Include.NON_NULL)
#JsonIgnoreProperties(ignoreUnknown = true)
public class FooInput {
#JsonProperty("field1")
private String field1;
#JsonProperty("field2")
private String field2;
}
Output POJO:
#Getter
#Setter
#ToString
#EqualsAndHashCode
public class FooEvent<T> extends EventInfo {
#JsonProperty(value = "entity")
private T entity;
#Builder
private FooEvent(T entity, String eventId, OffsetDateTime eventTime, Action eventAction, String eventSourceSystem, String eventEntityName) {
super(eventId, eventTime, eventAction, eventSourceSystem, eventEntityName);
this.entity = entity;
}
public FooEvent() {
super();
}
}
#Setter
#Getter
#ToString
#AllArgsConstructor
#NoArgsConstructor
public abstract class EventInfo {
#JsonProperty(value = "eventId")
private String eventId;
#JsonProperty(value = "eventTime")
private OffsetDateTime eventTime;
#JsonProperty(value = "eventAction")
private Action eventAction;
#JsonProperty(value = "eventSourceSystem")
private String eventSourceSystem;
#JsonProperty(value = "eventEntityName")
private String eventEntityName;
}
#Data
#NoArgsConstructor
#AllArgsConstructor
#JsonInclude(JsonInclude.Include.NON_NULL)
#JsonIgnoreProperties(ignoreUnknown = true)
public class Bar {
#JsonProperty("field1")
private String field1;
#JsonProperty("field2")
private String field2;
#JsonProperty("field3")
private String field3;
}
Processor function:
#Bean
public Function<KStream<String, FooInput>, KStream<String, FooEvent<Bar>>[]> process() {
Predicate<String, FooEvent<Bar>> predicate1=
(key, value) -> value.getEntity().getField1().equalsIgnoreCase("test1");
Predicate<String, FooEvent<Bar>> predicate2=
(key, value) -> value.getEntity().getField1().equalsIgnoreCase("test2");
return input -> {
input
...
.branch(predicate1, predicate2);
};
}
The binds are declared in appplication.properties:
Input:
spring.cloud.stream.bindings.process-in-0.destination=topic0
spring.cloud.stream.bindings.process-in-0.content-type=application/json
Output:
spring.cloud.stream.bindings.process-out-0.destination=topic1
spring.cloud.stream.bindings.process-out-0.content-type=application/json
spring.cloud.stream.bindings.process-out-1.destination=topic2
spring.cloud.stream.bindings.process-out-1.content-type=application/json
The issue is when the application evaluates the predicate. It appears that it tries to convert to FooEvent<Bar>. It converts the eventId, eventTime, eventAction, ... fields just fine but when it comes to the entity field (in this case Bar) it stores the values on a HashMap (instead of creating a new Bar object and setting the proper fields) which leads me to believe that Spring default Serde (JsonSerde) is doing something wrong. Any suggestions on how to solve generic types Serde problem in Kafka Streams?
I have a existing Model and want to use it with Picketlink. But I am using Long as #Id field. But Picketlink expect this to be a String field. I have found some hints to use another entity which maps to the corresponding entity of my model. But actually I don't now how to do it.
I have a base class, which all entities derive from:
#MappedSuperclass
public abstract class AbstractEntity implements Serializable, Cloneable {
#Id
#Identifier
#Column(name = "SID")
private Long sid;
#Column(name = "INSERT_TIME")
private Date insertTime;
#Column(name = "UPDATE_TIME")
private Date updateTime;
// getters and setters
}
And a derived realm entity:
#Entity
#IdentityManaged(Realm.class)
public class RealmEntity extends AbstractEntity {
#AttributeValue
private String name;
#PartitionClass
private String typeName;
#ConfigurationName
private String configurationName;
#AttributeValue
private boolean enforceSSL;
#AttributeValue
private int numberFailedLoginAttempts;
// getters and setters
}
And the mapping class for Picketlink looks as follows:
#IdentityPartition(supportedTypes = {
Application.class,
User.class,
Role.class
})
public class Realm extends AbstractPartition {
#AttributeProperty
private boolean enforceSSL;
#AttributeProperty
private int numberFailedLoginAttempts;
private Realm() {
this(null);
}
public Realm(String name) {
super(name);
}
}
The PartitionManager is defined as follows:
builder
.named("default.config")
.stores()
.jpa()
.supportType(User.class, Role.class, Application.class, Realm.class)
.supportGlobalRelationship(Grant.class, ApplicationAccess.class)
.mappedEntity(App.class, AppUserRole.class, AppRole.class, AppUser.class, UserEntity.class, RelationshipIdentityTypeEntity.class, RealmEntity.class)
.addContextInitializer((context, store) -> {
if (store instanceof JPAIdentityStore) {
if (!context.isParameterSet(JPAIdentityStore.INVOCATION_CTX_ENTITY_MANAGER)) {
context.setParameter(JPAIdentityStore.INVOCATION_CTX_ENTITY_MANAGER, entityManager);
}
}
});
When I try to create a new Realm Hibernate throws an error while trying to load the Realm because the #Id is defined as Long but the #Identifier of the Picketlink model is a String.
this.shsRealm = new Realm(REALM_SHS_NAME);
this.shsRealm.setEnforceSSL(true);
this.shsRealm.setNumberFailedLoginAttempts(3);
this.partitionManager.add(this.shsRealm);
java.lang.IllegalArgumentException: Provided id of the wrong type for class de.logsolut.common.picketlink.model.RealmEntity. Expected: class java.lang.Long, got class java.lang.String
How can I map the JPA model correctly to Picketlink?
I have the above domain structure where I have list of Companies in the product and the aim is not make entry in mongoDB when I have exact match for companies & productId already present in the DB.
#Entity
public class Mobile {
#Id
private Integer id;
private String imei;
private Product productInfo;
// ...
}
#Entity
public class Product {
#Id
private Integer id;
private String productId;
private List<Company<?>> companies;
// ...
}
#JsonTypeInfo(use = JsonTypeInfo.Id.NAME,
include = JsonTypeInfo.As.PROPERTY, property = "type")
#JsonSubTypes({
#JsonSubTypes.Type(name= "samsung", value = Samsung.class),
#JsonSubTypes.Type(name= "htc",value = Htc.class)})
public class Company<T> implements Serializable {
private static final long serialVersionUID = -8869676577723436716L;
private T companyInfo;
private String type;
// ...
}
I am using mongo template and I have tried to use find as shown below but id didn't work
template.find(Query.query(Criteria.where("product.companies").is(companList),Mobile.class);
I have a class hierarchy for JPA entities with the base class being a MappedSuperclass which has one ID defined. I am trying to use a composite key in a subclass however that does not seem to work
My code looks like this
#MappedSuperclass
public class BaseEntity implements Serializable {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Basic(optional = false)
#Column(name = "id")
protected Long id;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
}
#Entity
#EntityListeners(EntityBaseListener.class)
#Inheritance(strategy=InheritanceType.JOINED)
#Table(name = "catalog_entity")
public class BaseCatalogEntity extends BaseEntity {
#Column(name = "created_at", nullable = false)
#Temporal(TemporalType.TIMESTAMP)
private Date createdAt;
#Column(name = "updated_at", nullable = false)
#Temporal(TemporalType.TIMESTAMP)
private Date updatedAt;
public void setCreatedAt(Date date)
{
createdAt = date;
}
public void setUpdatedAt(Date date)
{
updatedAt = date;
}
public Date getCreatedAt() {
return createdAt;
}
public Date getUpdatedAt() {
return updatedAt;
}
}
#Entity
#Table(schema = "student_catalog")
#IdClass(value = StudentCatalog.StudentCatalogPK.class)
public class StudentCatalog extends BaseCatalogEntity {
#Id
#Column(name = "name", nullable = false, length = 100)
private String name;
#Id
#Column(name = "version", nullable = false)
private Integer version;
#Column(name = "description" , length = 255)
private String description;
#Column(name = "vendor" , length = 50)
private String vendor;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getVersion() {
return version;
}
public void setVersion(Integer version) {
this.version = version;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getVendor() {
return vendor;
}
public void setVendor(String vendor) {
this.vendor = vendor;
}
public static class StudentCatalogPK implements Serializable {
private Long id;
private String name;
private Integer version;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getVersion() {
return version;
}
public void setVersion(Integer version) {
this.version = version;
}
#Override
public boolean equals(Object obj) {
boolean result = false;
if(obj != null && (obj instanceof StudentCatalogPK)) {
StudentCatalogPK other = (StudentCatalogPK)obj;
result = (Objects.equals(this.id, other.id) && Objects.equals(this.name, other.name) &&
Objects.equals(this.version, other.version));
}
return result;
}
#Override
public int hashCode() {
return (27780 + (this.id != null ? this.id.hashCode() : 0) +
(this.version != null ? this.version.hashCode() : 0) +
(this.name != null ? this.name.hashCode() : 0));
}
}
}
I get the following exception:
Exception Description: Invalid composite primary key specification. The names of the primary key fields or properties in the primary key class [com.example.jpa.StudentCatalog$StudentCatalogPK] and those of the entity bean class [class com.example.jpa.StudentCatalog] must correspond and their types must be the same. Also, ensure that you have specified ID elements for the corresponding attributes in XML and/or an #Id on the corresponding fields or properties of the entity class.
I am using Eclipselink 2.5.1. Is there a way I can get this to work without changing the BaseEntity and BaseCatalogEntity classes?
It is not legal in JPA to redefine the id in subclasses. This would lead to ambiguities in the table mappings as well as in polymorphic queries.
The desire to extend the key defined in a superclass is a common issue when business keys are used for DB identity. I would advise to use only surrogate keys (like UUID) for DB identity and business keys for instance identity.
Under following conditions:
your base entity should use TABLE_PER_CLASS inheritance (and as I can see it is)
your base entity (composite key) key is of the same type as that one you want to have in your derived class (so there should be also composite key of String and Integer).
You can use #AttributeOverride annotation under class declaration, removing #Id fields from it:
#AttributeOverride(name = "id", column = #Column(name = "NAME"))
This - in result, can change column name in derived entity's table and that's the most you can acheive.
When using #MappedSuperClass, it would be advisable to make the BaseEntity Class as abstract and then extending the Base class from other Entity classes.
Cleaner approach keeping inheritance in mind and designing your application.
I have a problem to handle mapping object relationship for mysql tables.
I have 2 tables shown below:
Device
-----------
deviceId PK
deviceName
ApkInfo
--------
id PK
packageName
appName
deviceId FK
And then here are my classes:
#Entity
#Table(name="Device")
public class Device implements Serializable {
#Column
#Id
private String deviceId;
#Column
private String deviceName;
//getters and setters
}
#Entity
#Table(name="ApkInfos")
public class ApkInfo implements Serializable {
#Column
#Id
#GeneratedValue(strategy=GenerationType.AUTO)
private int id;
#Column
#Id
private String packageName;
#Column
private String appName;
#Column
#Temporal(TemporalType.TIMSTAMP)
private Date installDate;
#ManyToOne
#JoinColumn(name="deviceId" referencedColumnName="deviceId")
private Device device;
//getters and setters
}
This works for me, but I want to use compound key, deviceId and packageName, in ApkInfos table.
#Entity
#Table(name="ApkInfos")
public class ApkInfo implements Serializable {
#Colum(instable=false, updatable=false)
#Id
private String deviceId;
#Column
private String packageName;
#Column
private String appName;
#ManyToOne
#JoinColumn(name="deviceId" referencedColumnName="deviceId")
private Device device;
//getters and setters
}
But when I tried to save an entity using Spring Data JPA repository, I got an error:
org.springframework.dao.InvalidAccessApiUsageException: Class must not
be null, nested exception is java.lang.IllegalArgumentException: Class
must not be null
ApkInfo apkInfo = new ApkInfo();
apkInfo.setDeviceId("1234");
apkInfo.setPackageName("aaa");
apkInfo.setAppName("myapp");
apkInfo.setInstallDate(new Date());
apkInfo.setDevice(new Device("1234"));
repository.save(apkInfo);
And device has the deviceID '1234' already exists in the Device table.
I created a separate primary key class added #IdClass in the ApkInfo class. It works fine now, thanks. I am going to have a look at EmbeddedId more later.
I added #IdClass at the entity class and #Id for the packageName property. Also I made insert, update false for the One-to-many column.
#Entity
#Table(name="ApkInfos")
#IdClass(ApkInfo.class)
public class ApkInfo implements Serializable {
#Column #Id private String deviceId;
#Column #Id private String packageName;
#ManyToOne
#JoinColumn(name="deviceId" referencedColumnName="deviceId", insetable=false, updatable=false)
private Device device;
//getters and setters missing
}
Primary key class has only setters and overrides equals and hasCode methods.
public class ApkInfo implements Serializable {
private String deviceId;
private String packageName;
public ApkInfo(){}
public ApkInfo (String deviceId, String packageName){
this.deviceId = deviceId;
this.packageName = packageName;
}
public String getDeviceId(){
return this.deviceId;
}
public String getPackageName(){
return this.packageName;
}
#Override
public boolean equals(Object obj){
return (obj!=null &&
obj instanceof ApkInfoPk &&
deviceId.equals(((ApkInfoPk)obj).getDeviceId()) &&
packageNames.equals(((ApkInfoPk)obj).getPackageName()) );
}
#Override
public int hashCode(){
super.hashCode();
}
}