Quick Groovy script to check which characters are supported in jcr local names

testJcrNodeNames.groovy

import javax.jcr.*;
import java.util.*;
import java.util.stream.*;
import java.io.*;
import java.nio.*;
import com.fasterxml.jackson.databind.ObjectMapper;

// quick script to check which characters are supported in jcr local names
Session session = resourceResolver.adaptTo(Session.class);

Node test = session.getNode('/content/test');

unsupportedText = new File("~/Desktop/unsupported.txt");
writer = new BufferedWriter(new FileWriter(unsupportedText));

Node bucket = test.addNode('bucket-0',"nt:unstructured");
session.save();
session.refresh(false)
int group = 0;
List<Map<String,Object>> failedCodepoints = new ArrayList<>();
for (int i=0; i<=1114110; i++) {
    if (Character.isDefined(i)){
        println "Creating node ${Integer.toHexString(i)}: ${new String(Character.toChars(i))}";
        try{
            bucket.addNode("test-${new String(Character.toChars(i))}-test","nt:unstructured");
            session.save();
        }catch(RepositoryException re){
            char[] chars = Character.toChars(i);
            for(char c : chars){
                failedCodepoints.add([character: new String(c), num: i, unicode: String.format("\\u%04x", (int) c), name: Character.getName((int)c)]);
                writer.println("${String.format("\\u%04x", (int) c)}: ${Character.getName((int)c)}")
                writer.flush();
            }
            
            session.refresh(false)
        }
    }
    if(i > 0 && i % 1000 == 0){
        group++;
        bucket = test.addNode("bucket-${group}","nt:unstructured");
    }
}
println failedCodepoints

ObjectMapper mapper = new ObjectMapper();
file = new File("~/Desktop/unsupported.json");
mapper.writeValue(file,failedCodepoints);
writer.close();