/*
 * Copyright 2000-2002, OpenLDAP Foundation, All Rights Reserved.
 * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
 */


#ifndef LDAP_ATTRIBUTE_H
#define LDAP_ATTRIBUTE_H

#include<iostream>
#include<string>
#include<ldap.h>
#include<lber.h> 

#include <StringList.h>

/**
 * Represents the name an value(s) of an Attribute 
 */
class LDAPAttribute{
    public :
        /** 
         * Default constructor.
         * initializes an empty object.
         */
        LDAPAttribute();

        /**
         * Copy constructor.
         * Copies all values of an Attribute to a new one
         * @param attr   The Attribute that should be copied
         */
        LDAPAttribute(const LDAPAttribute& attr);

        /**
         * Construct an Attribute with a single string value
         * @param name      The attribute's name (type)
         * @param value     The string value of the attribute, if "" the
         *                  attribute will have no values, for LDAPv3 
         *                  this values must be UTF-8 encoded
         */
        LDAPAttribute(const std::string& name, const std::string& value="");

        /** 
         * Construct an attribute with multiple string values
         * @param name      The attribute's name (type)
         * @param values    A 0-terminated array of char*. Each char* specifies
         *                  one value of the attribute (UTF-8 encoded)
         */
        LDAPAttribute(const char* name, char **values);
        
        /** 
         * Construct an attribute with multiple string values
         * @param name      The attribute's name (type)
         * @param values    A list of strings. Each element specifies
         *                  one value of the attribute (UTF-8 or binary 
         *                  encoded)
         */
        LDAPAttribute(const std::string& name, const StringList& values);

        /**
         * Construct an attribute with multiple binary coded values
         * @param name      The attribute's name (type)
         * @param values    0-terminated array of binary attribute values
         *                  The BerValue struct is declared as:<BR>
         *                  struct berval{
         *                      unsigned long bv_len;
         *                      char *bv_val;
         *                  } BerValue;
         */         
        LDAPAttribute(const char* name, BerValue **values);
        
        /**
         * Destructor
         */
        ~LDAPAttribute();

        /**
         * Add a single string value(bin/char) to the Attribute
         * @param value Value that should be added, it is copied inside the
         *              object
         */
        void addValue(const std::string& value);

        /**
         * Add a single binary value to the Attribute
         * @param value The binary coded value that should be added to the
         *              Attribute.
         * @return  0  no problem <BR>
         *          -1 failure (mem. allocation problem)
         */
        int addValue(const BerValue *value);

        /**
         * Set the values of the attribute. If the object contains some values
         * already, they are deleted
         * @param values    0-terminated array of char*, each char* 
         *                  representing a string value to add to the entry
         * 
         * @return  0  no problem <BR>
         *          -1 failure (mem. allocation problem)
         */
        int setValues(char** values);

        /**
         * Set the values of the attribute. If the object does already contain
         * some values, they will be deleted
         * @param values    0-terminated array of BerValue*, each BerValue
         *                  representing a binary value to add to the entry
         * 
         * @return  0  no problem <BR>
         *          -1 failure (mem. allocation problem)
         */
        int setValues(BerValue** values);

        /**
         * Set the values of the attribute. If the object does already contain
         * some values, they will be deleted
         * @param values    A list of string-Objects. Each string is 
         *                  representing a string or binary value to add to
         *                  the entry
         */
        void setValues(const StringList& values); 

        /**
         * For interal use only.
         * This method is used to translate the values of the Attribute to
         * 0-terminated Array of BerValue-structs as used by the C-API
         * @return  The Values of the Attribute as an 0-terminated Array of 
         *          BerValue* (is dynamically allocated, delete it after usage) 
         *          <BR>
         *          0-pointer in case of error
         */
        BerValue** getBerValues() const;

        /**
         * @return The values of the array as a list of strings
         */
        const StringList& getValues() const;
        
        /**
         * @return The number of values of the attribute
         */
        int getNumValues() const;

        /**
         * @return The name(type) of the attribute
         */
        const std::string& getName() const ;

        /**
         * Sets the Attribute's name (type) 
         * @param the new name of the object  
         */
        void setName(const std::string& name);

        /**
         * For internal use only.
         *
         * This method translate the attribute of the object into a
         * LDAPMod-Structure as used by the C-API
         */
        LDAPMod* toLDAPMod() const ;

        /**
         * @return true If the attribute contains non-printable attributes
         */
        bool isNotPrintable() const ;

    private :
        std::string m_name;
        StringList m_values;

    /**
     * This method can be used to dump the data of a LDAPResult-Object.
     * It is only useful for debugging purposes at the moment
     */
    friend std::ostream& operator << (std::ostream& s, const LDAPAttribute& attr);
};
#endif //#ifndef LDAP_ATTRIBUTE_H
