Java – Could not find which method () to invoke from this list on newInstance in groovy closure

I am learning groovy and I am trying to initialize my class dynamically with default values for all fields. So how I am proceeding is, I am taking the list of all the properties and getting the type of that object and create an object of the type, but I am getting error when executing newInstance :

Exception in thread "main" org.codehaus.groovy.runtime.metaclass.MethodSelectionException: Could not find which method <init>() to invoke from this list:
  public java.lang.Boolean#<init>(boolean)
  public java.lang.Boolean#<init>(java.lang.String)
    at groovy.lang.MetaClassImpl.chooseMethodInternal(MetaClassImpl.java:3160)
    at groovy.lang.MetaClassImpl.chooseMethod(MetaClassImpl.java:3097)
    at groovy.lang.MetaClassImpl.invokeConstructor(MetaClassImpl.java:1707)
    at groovy.lang.MetaClassImpl.invokeConstructor(MetaClassImpl.java:1526)
Below is the code
public static void init() {
        Position position1 = new Position();
        JXPathContext context = JXPathContext.newContext(position1)
        context.createPathAndSetValue('id', '2')
        position1.properties.each { Map.Entry entry ->
            String propertyName = entry.key;
            if (!propertyName.equalsIgnoreCase('class')) {
                Class clazz = position1.class.getDeclaredField(propertyName)?.type
                println "$clazz"
                Object ob = clazz.newInstance()
        Identifier sourceSystemPositionId = new Identifier()
        context.setValue('sourceSystemPositionId/content', 'default-content')
        context.setValue('sourceSystemPositionId/domain', 'default-domain')
        println "$position1"
View the java docs for java.lang.Boolean. As you can see in the section Constructor Summary there's no no-arg constructor (and this is what exception message says) for this class. You must either: 
invoke it (constructor) with boolean or String argument
use default value for boolean - which is false
initialize the value with Boolean.FALSE or Boolean.TRUE
Related Solutions
Can you break from a Groovy “each” closure

Nope, you can't abort an "each" without throwing an exception.  You likely want a classic loop if you want the break to abort under a particular condition.
Alternatively, you could use a "find" closure instead of an each and return true when you would have done a break.
This example will abort before processing the whole list:
def a = [1, 2, 3, 4, 5, 6, 7]
a.find { 
    if (it > 5) return true // break
    println it  // do the stuff that you wanted to before break
    return false // keep looping
Prints 
but doesn't print 6 or 7.
It's also really easy to write your own iterator methods with custom break behavior that accept closures:
List.metaClass.eachUntilGreaterThanFive = { closure ->
    for ( value in delegate ) {
        if ( value  > 5 ) break
        closure(value)
def a = [1, 2, 3, 4, 5, 6, 7]
a.eachUntilGreaterThanFive {
    println it
Also prints:
    
Retrieve Groovy Closure/Method parameters list

You won't like it (and I hope it's not my bad to do research and to answer), however:
There is no API to access the list of parameters declared in a Groovy Closure or in a Java Method.
I've also looked at related types, including (for Groovy) MetaClass, and sub-types, and types in the org.codehaus.groovy.reflection package, and (for Java) types in the java.lang.reflect package.
Furthermore, I did an extensive Google search to trace extraterrestrials. ;-)
If we need a variable-length list of closure or method arguments, we can use an Object[] array, a List, or varargs as parameters:
def closure = { id, Object... args ->
    println id
    args.each { println it }
closure.call(1, "foo", "bar")
Well, that's the limitations and options!