'not found' error but the function is defined - scala

Question

Using this class I'm attempting to modify the String parameter of the constructor and convert it to date :
class OrderInstance(var size: Double,
var side: String,
var trade_id: Int,
var price: Double,
var time: java.util.Date,
var code: String) {
def getTime(time: String): java.util.Date = new java.util.Date()
def this(size: String,
side: String,
trade_id: Int,
price: String,
time: String, code: String) = this(size.toDouble: Double,
side: String,
trade_id: Int,
price.toDouble: Double,
getTime(time: String) : java.util.Date, code: String)
// Step 3 - proper signature for `equals`
// Steps 4 thru 7 - implement a `match` expression
override def equals(that: Any): Boolean =
that match {
case that: OrderInstance => {
that.canEqual(this) &&
this.trade_id == that.trade_id
}
case _ => false
}
// Step 1 - proper signature for `canEqual`
// Step 2 - compare `a` to the current class
def canEqual(a: Any) = a.isInstanceOf[OrderInstance]
// Step 8 - implement a corresponding hashCode c=method
override def hashCode: Int = {
val prime = 31
var result = 1
result = prime * result + trade_id;
result = prime * result + (if (code == null) 0 else code.hashCode)
result
}
override def toString = {
String.valueOf(trade_id)
}
}
This line :
def getTime(time: String): java.util.Date = new java.util.Date()
should be called in order to return a date instead of String. But I receive error :
Error:(54, 7) not found: value getTime
getTime(time: String) : java.util.Date, code: String)
This error is reported at run time, not compile time. Have I not defined the function getTime correctly ?
Update :
I've attempted to make more clear what I'm trying to achieve :
class OrderInstance(var size: Double,
var side: String,
var trade_id: Int,
var price: Double,
var time: String,
var code: String){
this(time) = this(OrderInstance.getTime(time))
def this(size: String,
side: String,
trade_id: Int,
price: String,
time: String, code: String) = this(size.toDouble: Double,
side: String,
trade_id: Int,
price.toDouble: Double,
time : String, code: String)
// Step 3 - proper signature for `equals`
// Steps 4 thru 7 - implement a `match` expression
override def equals(that: Any): Boolean =
that match {
case that: OrderInstance => {
that.canEqual(this) &&
this.trade_id == that.trade_id
}
case _ => false
}
// Step 1 - proper signature for `canEqual`
// Step 2 - compare `a` to the current class
def canEqual(a: Any) = a.isInstanceOf[OrderInstance]
// Step 8 - implement a corresponding hashCode c=method
override def hashCode: Int = {
val prime = 31
var result = 1
result = prime * result + trade_id;
result = prime * result + (if (code == null) 0 else code.hashCode)
result
}
override def toString = {
String.valueOf(trade_id)
}
}
object OrderInstance {
def getTime(time: String): java.util.Date = new java.util.Date()
}
new OrderInstance(1.0 , "" , 1 , 1.0 , "2019-09-13T16:27:19.881Z" , "")
This returns error :
Error:(60, 26) OrderInstance does not take parameters
this(time) = this(OrderInstance.getTime(time))
for line
this(time) = this(OrderInstance.getTime(time))
How to update time to be converted to Date instead of String ?

Answer 1

getTime is an instance method, which you're trying to invoke from a constructor, i.e. before the instance has been created. Since getTime doesn't actually use any instance variables, you'll want to place it in a companion object (the scala equivalent of static)
class OrderInstance(
//...
) {
this(string) = this(OrderInstance.getTime(string))
}
object OrderInstance {
def getTime(time: String): java.util.Date = new java.util.Date()
}

Answer 2

Thanks to answer from user user1186491 this works as expected :
class OrderInstance(var time: java.util.Date){
def this(time: String) = this(
OrderInstance.getTime(time))
}
object OrderInstance {
def getTime(time: String): java.util.Date = new java.util.Date()
}
val o = new OrderInstance("2019-09-13T16:27:19.881Z" )
println(o.time)