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package com.netscape.jndi.ldap.schema;

import java.util.Enumeration;

import javax.naming.Binding;
import javax.naming.NamingEnumeration;
import javax.naming.NamingException;
import javax.naming.directory.DirContext;

import netscape.ldap.LDAPAttributeSchema;
import netscape.ldap.LDAPMatchingRuleSchema;
import netscape.ldap.LDAPObjectClassSchema;
import netscape.ldap.LDAPSchemaElement;

class SchemaElementBindingEnum implements NamingEnumeration<Binding> {

    /**
     * Enumeration of schema name-object bindings packaged into Binding object.
     */
    Enumeration<? extends LDAPSchemaElement> m_schemaElementEnum;

    SchemaManager m_schemaMgr;

    static final String _className = "javax.naming.directory.DirContext"; // for class name is bindings

    public SchemaElementBindingEnum(Enumeration<? extends LDAPSchemaElement> schemaElementEnum, SchemaManager schemaMgr) {
        m_schemaElementEnum = schemaElementEnum;
        m_schemaMgr = schemaMgr;
    }

    public Binding next() throws NamingException{
        return nextElement();
    }

    public Binding nextElement() {
        DirContext obj = null;
        LDAPSchemaElement schemaElement = m_schemaElementEnum.nextElement();
        if (schemaElement instanceof LDAPObjectClassSchema) {
            obj = new SchemaObjectClass((LDAPObjectClassSchema) schemaElement, m_schemaMgr);
        }
        else if (schemaElement instanceof LDAPAttributeSchema) {
            obj = new SchemaAttribute((LDAPAttributeSchema) schemaElement, m_schemaMgr);
        }
        else if (schemaElement instanceof LDAPMatchingRuleSchema) {
            obj = new SchemaMatchingRule((LDAPMatchingRuleSchema) schemaElement, m_schemaMgr);
        }
        return new Binding(schemaElement.getName(), _className, obj, /*isRelative=*/true);
    }

    public boolean hasMore() throws NamingException{
        return m_schemaElementEnum.hasMoreElements();
    }

    public boolean hasMoreElements() {
        return m_schemaElementEnum.hasMoreElements();
    }

    public void close() {}
}