Translate from javascript to rules DSL

[rlkoshak (Rich Koshak)]

@MartOs

For example, Kitchen_Ceiling_Light_Brightness and Hall_Lamp have a different number of splits, so I can’t use a set number of splits to get the right bit.

You could recreate your Items to follow a set naming pattern.

@MartOs

I’m wondering if I can somehow get the last split and then replace it with _ColorTemperature.

If you know it will always be “_Lamp”, for example you can use replace.

i.name.replace("_Lamp", "_ColorTemperature")

@MartOs

Where can I find the refences to these things like .name .split .get(0) .head?

They are all parts of the Java Classes you are working with.

Method	Where it’s maintained	Link to JavaDocs
.name	openHAB, part of Item	GenericItem (openHAB Core 4.2.0-SNAPSHOT API)
.split	Core Java, part of String	String (Java SE 11 & JDK 11 )
.get(0)	Core Java, Rules DSL converts arrays to an ArrayList.	ArrayList (Java SE 11 & JDK 11 )
.head	Part of Xtend’s way to process Lists. Their docs are all over the place though. It’s a layer on top of Java’s Stream API. I’ve consolidated this at the following DP.	Design Pattern: Working with Groups in Rules

@MartOs

newState is the new state of the CalculatedColorTemperature item that triggers the rule

Doh, I’ve been away from Rules DSL for too long.

@MartOs

I’m not sure how to break down and test.

Like I said, save each step to it’s own variable instead of trying to do everything all on one line.

val members = gAll_Lights_Brightness.members
logInfo("test", "All members: " + members)
val filtered = members.filter[i | i.state as Number > 0]
logInfo("test", "Filtered: " + filtered)
filtered.forEach[item |
    logInfo("test", "Processing Item " + item.name)
    // here is where it's better to do String manipulation to convert item.name to the ColorTemperature
    // Item's name, even if it means you have to rename those Items to fit the pattern
    // sendCommand(item.name.replace("Lamp", "ColorTemperature"), newState.toString)
    // or maybe it's as simple as
    // sendCommand(item.name + "_ColorTemperature", newState.toString)

    // As explained in the working with groups DP linked above, use findFirst instead of filter and head
    val commandItem = gAll_Lights_ColorTemperature.members.findFirst[ j | j.name.contains(item.name) ]
    logInfo("test", "Color Item found is " + commandItem) // if this is null the Item was not found
    commandItem.sendCommand(newState)
]

Break it up and log each step of the way. If you do half a dozen operations all on the same line and it doesn’t work it’s impossible to figure out why.