How to parse "string" from event topics?

[peter-luwig]

The smart contract has this event:
Deposit(address,string,address,uint256)
I defined this event in Kotlin:
Event( "Deposit", listOf( object : TypeReference<Address>(true) {}, object : TypeReference<Utf8String>(true) {}, object : TypeReference<Address>(true) {}, object : TypeReference<Uint256>(false) {}, ) )

The event hash is computed correctly:
0xaad69ef0c77f7c04ba3390022ae56a77ba8686b6cd9530eff3a0a8c38d33e5ad

But when I parsed the topic the get the original string value using this code:
FunctionReturnDecoder.decodeIndexedValue( topics[2], object : TypeReference<Utf8String>() {} ) as Utf8String

I got this exception:
Exception in thread "main" java.lang.ClassCastException: class org.web3j.abi.datatypes.generated.Bytes32 cannot be cast to class org.web3j.abi.datatypes.Utf8String (org.web3j.abi.datatypes.generated.Bytes32 and org.web3j.abi.datatypes.Utf8String are in unnamed module of loader 'app')

What's the correct way to parse a string topic?

[peter-luwig]

I found the reason, string is hashed when adding to topics since its length is arbitrary. I added that value to data and I can parse it correctly.
Event( "Deposit", listOf( object : TypeReference<Address>(true) {}, object : TypeReference<Utf8String>(true) {}, object : TypeReference<Address>(true) {}, object : TypeReference<Utf8String>(false) {}, object : TypeReference<Uint256>(false) {}, ) )