ClassCastException because in diffrent modules

Question 1

I encounter this issue with spring LDAP:

class javax.naming.ldap.LdapName cannot be cast to class java.lang.String (javax.naming.ldap.LdapName is in module java.naming of loader 'bootstrap'; java.lang.String is in module java.base of loader 'bootstrap')

Here is the piece of codes where the issue occurs

private void createUser(LdapAttributes ldapAttributes) {        LdapName dn = LdapNameBuilder                .newInstance()                .add("ou", "users")                .add("cn", ldapAttributes.getName())                .build();        DirContextAdapter context = new DirContextAdapter(dn);        context.setAttributeValues(                "objectclass",                new String[]                        { "top",                          "person",                          "organizationalPerson",                          "inetOrgPerson" });        context.setAttributeValue("cn", ldapAttributes.getName());        context.setAttributeValue("sn", ldapAttributes.getName());        context.setAttributeValue("userPassword", ldapAttributes.get("userPassword"));        ldapTemplate.bind(context);    }

I am using spring org.springframework.ldap:spring-ldap-core and org.springframework.ldap:spring-ldap-ldif-core both in version 2.4.1

Springboot is in version 2.7.12

Question 2

the exception occurs in LdapName dn = LdapNameBuilder .newInstance() .add("ou", "users") .add("cn", ldapAttributes.getName()) .build(); with message Method threw 'java.lang.ClassCastException' exception. Cannot evaluate javax.naming.ldap.LdapName.toString()

Question 3

It isnot because of different modules. It is becauseLdapName cannot be cast toString. This is an error in your code.

Question 4

did you tryldapAttributes.getName().toString() ?

Here is the code that i test with Spring

import javax.naming.ldap.LdapName;import org.springframework.ldap.core.LdapAttributes;import org.springframework.ldap.support.LdapNameBuilder;import org.springframework.ldap.support.LdapUtils;@Testpublic void createUser() {    LdapAttributes ldapAttributes = new LdapAttributes();    ldapAttributes.setName(LdapUtils.newLdapName("cn=Mango,ou=Fruits,o=Food"));    String name = ldapAttributes.getName().toString();    LdapName dn = LdapNameBuilder            .newInstance()            .add("ou", "users")            .add("cn", ldapAttributes.getName())            .build();    assertEquals(name, ldapAttributes.getName().toString());    assertEquals(name, String.valueOf(ldapAttributes.getName()));}

Question 5

yes i did, unfortunately same issue

bilgin 1521 silver badge14 bronze badges · Accepted Answer · 2023-10-04 12:33:50Z

did you tryldapAttributes.getName().toString() ?

Here is the code that i test with Spring

import javax.naming.ldap.LdapName;import org.springframework.ldap.core.LdapAttributes;import org.springframework.ldap.support.LdapNameBuilder;import org.springframework.ldap.support.LdapUtils;@Testpublic void createUser() {    LdapAttributes ldapAttributes = new LdapAttributes();    ldapAttributes.setName(LdapUtils.newLdapName("cn=Mango,ou=Fruits,o=Food"));    String name = ldapAttributes.getName().toString();    LdapName dn = LdapNameBuilder            .newInstance()            .add("ou", "users")            .add("cn", ldapAttributes.getName())            .build();    assertEquals(name, ldapAttributes.getName().toString());    assertEquals(name, String.valueOf(ldapAttributes.getName()));}

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ClassCastException because in diffrent modules

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