gistfile1.java

@JsonbTypeSerializer(Organisation.MySerializer.class)
public class Organisation {
    private String name;

    private List<Admin> admins = new ArrayList<>();

    private List<Admin> siteAdmins = new ArrayList<>();


    public Organisation() {
    }

    public Organisation(String name) {
        this.name = name;
        this.admins.add(new Admin("kabir", "KK"));
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public List<Admin> getAdmins() {
        return admins;
    }

    public void setAdmins(List<Admin> admins) {
        this.admins = admins;
    }

    public List<Admin> getSiteAdmins() {
        // return null;
        throw new LazyInitializationException("b");
    }

    public void setSiteAdmins(List<Admin> siteAdmins) {
        this.siteAdmins = siteAdmins;
    }

    public static abstract class AbstractSerializer<T> implements JsonbSerializer<T> {
        private final Map<String, Function<T, ?>> suppliers;

        protected AbstractSerializer(Map<String, Function<T, ?>> suppliers) {
            this.suppliers = suppliers;
        }

        @Override
        public final void serialize(T t, JsonGenerator generator, SerializationContext ctx) {
            if (t != null) {
                generator.writeStartObject();
                for (Map.Entry<String, Function<T, ?>> entry : suppliers.entrySet()) {
                    try {
                        Object value = entry.getValue().apply(t);
                        if (value != null) {
                            ctx.serialize(entry.getKey(), value, generator);
                        }
                    } catch (LazyInitializationException ignore) {
                    }
                }
                generator.writeEnd();
            } else {
                ctx.serialize(null, generator);
            }
        }
    }

    public static class MySerializer extends AbstractSerializer<Organisation> {

        Map<String, Supplier<?>> x = new HashMap<>();

        public MySerializer() {
            super(
                    MapBuilder.<String, Function<Organisation, ?>>linkedHashMap()
                            .put("name", org -> org.getName())
                            .put("admins", org -> org.getAdmins())
                            .put("siteAdmins", org -> org.getSiteAdmins())
                            .build()
            );
        }
    }
}