Cannot access domain property from Java class (in src folder) - grails

Question

I cannot access exploits property in domain class - Scenario , from my java class - MatchScenario , located in Grails src folder.
Already tried :
Explicit methods :
I have tried explicitly creating the get;set; but I get stackOverflow error since the setExploits() is called infinitely by itself for some reason.
Service to return the exploit field,
Though the service was created, it's never called on my fork-debug integration testing, so tests hangs with no exception
compilation error ->
Error:(59, 44) java: cannot find symbol
symbol: variable exploits
location: variable scenario of type core.Scenario
Java class, error on the inner loop ->
public class MatchScenario implements Callable{
private static final Logger LOG = Logger.getLogger(MatchScenario.class.getCanonicalName());
private List<Scenario> scenarioList
#Override
public List<Scenario> call() throws Exception {
LOG.debug( "*********************** schedule matcher called *****************************" );
if (scenarioList==null) {
LOG.debug("scenarioList not initialized ");
return null;
}
List<Scenario> scenarioAvailable = new ArrayList<Scenario>();
for (Scenario scenario : scenarioList){
for (Exploit exploit : scenario.exploits){
//println 'exploit -> '+exploit
if (!match( exploit.getExpression() ) ){
break;
}
}
//happens only when all scenario are available ( no break issued )
scenarioAvailable.add(scenario);
}
return scenarioAvailable;
}
private boolean match(String expression) {
return true;
}
}
Scenario domain object ->
package core
class Scenario {
String name
static belongsTo = [ Exploit ]
static hasMany = [ exploits : Exploit ]
static constraints = {
name nullable: false , maxSize: 32
}
}

Answer 1

You're confusing fields and properties. When you declare a property in a Groovy class, e.g. String name, the Groovy compiler converts that to a private field and adds a getter and a setter (unless you already defined one or both of them - it won't overwrite), in this case something like
private String name
public void setName(String name) { this.name = name }
public String getName() { return name }
It only does this if there's no scope modifier, so public String name and protected String name would both stay as defined.
One benefit of this is that you can later add logic to the getter and/or setter to modify the value, do some validation checks or computations, etc., and in Groovy you would still read and write to the name property since property access always calls the underlying setters and getters, and since properties like this are a Groovy-only thing that Java can't access, you would have been calling the setter and getter from Java all along, so you wouldn't need to recompile the Java classes that used the class.
Declaring a hasMany like yours creates an exploits property, effectively
Set<Exploit> exploits
and that property (added by a Grails AST transformation) is likewise converted to a private field with a getter and setter. So to get this working from Java, use the getter:
for (Exploit exploit : scenario.getExploits()) {