in johnzon-jsonschema/src/main/java/org/apache/johnzon/jsonschema/generator/SchemaProcessor.java [633:693]
private Object tryCreatingObjectInstance(final Type javaType) {
final Class<?> type = Class.class.cast(javaType);
if (type.isPrimitive()) {
if (int.class == type) {
return 0;
}
if (long.class == type) {
return 0L;
}
if (double.class == type) {
return 0.;
}
if (float.class == type) {
return 0f;
}
if (short.class == type) {
return (short) 0;
}
if (byte.class == type) {
return (byte) 0;
}
if (boolean.class == type) {
return false;
}
throw new IllegalArgumentException("Not a primitive: " + type);
}
if (Integer.class == type) {
return 0;
}
if (Long.class == type) {
return 0L;
}
if (Double.class == type) {
return 0.;
}
if (Float.class == type) {
return 0f;
}
if (Short.class == type) {
return (short) 0;
}
if (Byte.class == type) {
return (byte) 0;
}
if (Boolean.class == type) {
return false;
}
if (type.getName().startsWith("java.")
|| type.getName().startsWith("javax.")
|| type.getName().startsWith("jakarta.")
) {
return null;
}
try {
return type.getConstructor().newInstance();
} catch (final NoSuchMethodException | InstantiationException | IllegalAccessException
| InvocationTargetException e) {
// no-op, ignore defaults there
}
return null;
}