source: trunk/foundation/idl/nomstring.idl

/* ***** BEGIN LICENSE BLOCK *****
* Version: CDDL 1.0/LGPL 2.1
*
* The contents of this file are subject to the COMMON DEVELOPMENT AND
* DISTRIBUTION LICENSE (CDDL) Version 1.0 (the "License"); you may not use
* this file except in compliance with the License. You may obtain a copy of
* the License at http://www.sun.com/cddl/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is "NOM" Netlabs Object Model
*
* The Initial Developer of the Original Code is
* netlabs.org: Chris Wohlgemuth <cinc-ml@netlabs.org>.
* Portions created by the Initial Developer are Copyright (C) 2005-2006
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* the GNU Lesser General Public License Version 2.1 (the "LGPL"), in which
* case the provisions of the LGPL are applicable instead of those above. If
* you wish to allow use of your version of this file only under the terms of
* the LGPL, and not to allow others to use your version of this file under
* the terms of the CDDL, indicate your decision by deleting the provisions
* above and replace them with the notice and other provisions required by the
* LGPL. If you do not delete the provisions above, a recipient may use your
* version of this file under the terms of any one of the CDDL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */

#ifndef NOMSTRING_IDL_INCLUDED
#define NOMSTRING_IDL_INCLUDED

#include "nomobj.idl"
#include "nomfoundation.idl"

NOMCLASSNAME(NOMString);

/** \class NOMString
    The NOMString class is used for strings which automatically grow or shrink.
    Methods are provided for common tasks when dealing with strings like inserting or
    appending strings. A string object never can be empty. It always is a string which may have a length of zero.

    Note that you don't have to delete a NOMString object. This is done by the garbage collector. Deleting
    it doesn't hurt, though.
 */
interface NOMString : NOMObject
{
#ifdef __NOM_IDL_COMPILER__
  filestem=nomstring;
#endif

  /**
     The current version of this class is 1.0
   */
  NOMCLASSVERSION(1, 0);

  /**
     Assign a string to this NOMString. An initially created NOMString object is empty.
     This method can be used to assign some value to it.

     \remark
     This method does not work on a copy. So by assigning a value to the NOMString the
     old contents is lost. This may have sideeffects in multithreaded environments if used without care.

     \sa assignCString()
   */
  PNOMString assign(in PNOMString nomString);   

  /**
     Assign a C string to this NOMString. An initially created NOMString object is empty.
     This method can be used to assign some value to it.

     \remark
     This method does not work on a copy. So by assigning a value to the NOMString the old contents
     is lost. This may have sideeffects in multithreaded environments if used without care.

     \sa assign()
  */
  PNOMString assignCString(in string chrString);   

  /**
     Returns the C string holding the info inside the string object. Use with care. 
     In most cases you rather want to use copyCString() instead.

     \return The C string representing the contents of the string object. This is not a copy. 

     \sa copyCString()
  */
  string queryCString();

  /**
     Add the NOMString nomString to the end of the string object. 

     \remark The returned string object is not newly allocated. Be aware that the string data
     held by the object is. 

     \param nomString A NOMString object to be put at the end of the string.
     \return     
     Modified NOMString object with the given string object appended. This is not a copy. 

     \sa appendCString(), prepend()
   */
  PNOMString append(in PNOMString nomString);

  /**
     Prepend the NOMString \e nomString to the given string object and return the modified
     NOMString.

     \remark The returned string object is not newly allocated. Be aware that the string data
     held by the object is. 

     \param nomString A NOMString object to be put in front of the string.
     \return
     NOMString object with the string prepended. This is not a copy. 

     \sa prependCString()
   */   
  PNOMString prepend(in PNOMString nomString);

  /**
     Append the given C string to the end of the string held by the NOMString object.

     \remark The returned string object is not newly allocated. Be aware that the string data
     held by the object is. 

     \param chrString A null terminated string.
     \return
     Modified NOMString object with the C string appended. This is not a copy. 

     \sa append(), prependCString()
   */
  PNOMString appendCString(in string chrString);

  /**
     Prepend the C string to the string object.

     \remark The returned string object is not newly allocated. Be aware that the string data
     held by the object is. 

     \param chrString A null terminated string.
     \return
     Modified NOMString object with the C string prepended.  This is not a copy.

     \sa appendCString(), prepend()
   */
  PNOMString prependCString(in string chrString);

  /**
     \return Returns the length of the string in characters.
   */
  unsigned long length();

  /**
     Cuts off the end of a string leaving the first ulNewLen characters.

     \remark The returned string object is not newly allocated. Be aware that the string data
     held by the object is. 

     \return
     Truncated NOMString object. This is not a copy. 
  */
  PNOMString truncate(in unsigned long ulNewLen);

  /**
     Create a copy of the NOMString object this method is called on. The caller
     owns the new NOMString object.

     \return A new NOMString object

     \sa copyCString()
  */
  PNOMString copy();

  /**
     Returns a copy of the C string holding the info inside the string object.

     \return
     The returned C string is owned by the caller.

     \sa copy()
   */
  string copyCString();

  /**
     Override of nomInit() to initialize the GString */
  NOMOVERRIDE(nomInit);

  /**
     The GString holding the data
  */
  NOMINSTANCEVAR(PGString gString);
};

#endif  /* NOMSTRING_IDL_INCLUDED */