CODEWITHSUNDEEP
javaazureazure-table-storage
Malt
Malt

Reputation: 30305

Cannot create a byte field in an Azure Table entity

I've created an Entity class that extends TableServiceEntity. My class has a single field called "value" of type Byte:

public class TestEntity extends TableServiceEntity{

    public Byte value;

    public TestEntity(){
        super("some_partition","somekey");
    }
    public Byte getValue() {
        return value;
    }
    public void setValue(Byte value) {
        this.value = value;
    }
}

According to the documentation for TableServiceEntity, Byte is one of the supported field types.

However when I try to store my entity, I get the following exception:

java.lang.IllegalArgumentException: Type class java.lang.Byte is not supported.
    at com.microsoft.azure.storage.table.EntityProperty.<init>(EntityProperty.java:175)
    at com.microsoft.azure.storage.table.PropertyPair.generateEntityProperty(PropertyPair.java:271)
    at com.microsoft.azure.storage.table.TableServiceEntity.writeEntityWithReflection(TableServiceEntity.java:217)
    at com.microsoft.azure.storage.table.TableServiceEntity.writeEntity(TableServiceEntity.java:470)
    at com.microsoft.azure.storage.table.TableEntitySerializer.writeJsonEntity(TableEntitySerializer.java:317)
    at com.microsoft.azure.storage.table.TableEntitySerializer.writeSingleJsonEntity(TableEntitySerializer.java:411)
    at com.microsoft.azure.storage.table.TableEntitySerializer.writeSingleEntityToStream(TableEntitySerializer.java:74)
    at com.microsoft.azure.storage.table.TableOperation.insertImpl(TableOperation.java:389)
    at com.microsoft.azure.storage.table.TableOperation.performInsert(TableOperation.java:370)
...

The fault seems to be with the EntityProperty constructor (see source), which doesn't seem to support Byte or byte types, only Byte[] and byte[]:

protected EntityProperty(final String value, final Class<?> type) {
   this.type = type;
   this.value = value;
   if (type.equals(byte[].class)) {
      this.getValueAsByteArray();
      this.edmType = EdmType.BINARY;
   }
   else if (type.equals(Byte[].class)) {
      this.getValueAsByteObjectArray();
      this.edmType = EdmType.BINARY;
   }
   ...

Am I doing something wrong, or is this a documentation error?

Upvotes: 0

Views: 437

Answers (2)

Malt
Malt

Reputation: 30305

It's a documentation bug. As Herve Roggero noted, the service model documentation states that Bytes aren't supported.

Upvotes: 0

Herve Roggero
Herve Roggero

Reputation: 5249

According to MSDN, the list of property types allowed for the Azure Table service does not include Edm.Byte, but does include Edm.Binary (which is byte[]). For a more in-depth understanding of the data types allowed and other limitations see Understanding the Table Service Data Model.

Upvotes: 1

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