/*
 * The Apache Software License, Version 1.1
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 * reserved.
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 * modification, are permitted provided that the following conditions
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 * 1. Redistributions of source code must retain the above copyright
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 * ====================================================================
 * 
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation, and was
 * originally based on software copyright (c) 1999, International
 * Business Machines, Inc., http://www.ibm.com .  For more information
 * on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

/**
 * $Id: XMLAttr.cpp,v 1.7 2000/07/25 22:33:28 aruna1 Exp $
 */


// ---------------------------------------------------------------------------
//  Includes
// ---------------------------------------------------------------------------
#include <util/XMLUniDefs.hpp>
#include <util/XMLUni.hpp>
#include <util/XMLString.hpp>
#include <framework/XMLAttr.hpp>



// ---------------------------------------------------------------------------
//  XMLAttr: Constructors and Destructor
// ---------------------------------------------------------------------------
XMLAttr::XMLAttr() :

    fName(0)
    , fNameBufSz(0)
    , fPrefix(0)
    , fPrefixBufSz(0)
    , fQName(0)
    , fQNameBufSz(0)
    , fType(XMLAttDef::CData)
    , fValue(0)
    , fValueBufSz(0)
    , fSpecified(false)
    , fURIId(0)
{
}

XMLAttr::XMLAttr(   const   unsigned int        uriId
                    , const XMLCh* const        attrName
                    , const XMLCh* const        attrPrefix
                    , const XMLCh* const        attrValue
                    , const XMLAttDef::AttTypes type
                    , const bool                specified) :

    fName(0)
    , fNameBufSz(0)
    , fPrefix(0)
    , fPrefixBufSz(0)
    , fQName(0)
    , fQNameBufSz(0)
    , fType(type)
    , fValue(0)
    , fValueBufSz(0)
    , fSpecified(specified)
    , fURIId(0)
{
    try
    {
        //
        //  Just call the local setters to set up everything. Too much
        //  work is required to replicate that functionality here.
        //
        setName(uriId, attrName, attrPrefix);
        setValue(attrValue);
    }

    catch(...)
    {
        cleanUp();
    }
}


// ---------------------------------------------------------------------------
//  XMLAttr: Getter methods
// ---------------------------------------------------------------------------
const XMLCh* XMLAttr::getQName() const
{
    //
    //  If there is no buffer, or if there is but we've not faulted in the
    //  value yet, then we have to do that now.
    //
    if (!fQName || !*fQName)
    {
        //
        //  Calculate the worst case size buffer we will need. We use the
        //  current high water marks of the prefix and name buffers, so it
        //  might be a little wasteful of memory but we don't have to do
        //  string len operations on the two strings.
        //
        const unsigned int neededLen = fPrefixBufSz + fNameBufSz + 1;

        //
        //  If no buffer, or the current one is too small, then allocate one
        //  and get rid of any old one.
        //
        if (!fQName || (neededLen > fQNameBufSz))
        {
            delete [] fQName;

            // We have to cast off the const'ness to do this
            ((XMLAttr*)this)->fQNameBufSz = neededLen;
            ((XMLAttr*)this)->fQName = new XMLCh[neededLen + 1];

            // Make sure its initially empty
            *fQName = 0;
        }

        //
        //  If we have a prefix, then do the prefix:name version. Else, its
        //  just the name.
        //
        if (*fPrefix)
        {
            const XMLCh colonStr[] = { chColon, chNull };
            XMLString::copyString(fQName, fPrefix);
            XMLString::catString(fQName, colonStr);
            XMLString::catString(fQName, fName);
        }
         else
        {
            XMLString::copyString(fQName, fName);
        }
    }
    return fQName;
}


// ---------------------------------------------------------------------------
//  XMLAttr: Setter methods
// ---------------------------------------------------------------------------
void XMLAttr::setName(  const   unsigned int    uriId
                        , const XMLCh* const    attrName
                        , const XMLCh* const    attrPrefix)
{
    unsigned int newLen;

    newLen = XMLString::stringLen(attrName);
    if (!fNameBufSz || (newLen > fNameBufSz))
    {
        delete [] fName;
        fNameBufSz = newLen + 8;
        fName = new XMLCh[fNameBufSz + 1];
    }
    XMLString::moveChars(fName, attrName, newLen + 1);

    newLen = XMLString::stringLen(attrPrefix);
    if (!fPrefixBufSz || (newLen > fPrefixBufSz))
    {
        delete [] fPrefix;
        fPrefixBufSz = newLen + 8;
        fPrefix = new XMLCh[fPrefixBufSz + 1];
    }
    XMLString::moveChars(fPrefix, attrPrefix, newLen + 1);

    // And clean up any QName and leave it undone until/if asked for again
    if (fQName)
        *fQName = 0;

    // And finally store the URI id parameter
    fURIId = uriId;
}


void XMLAttr::setURIId(const unsigned int uriId)
{
    fURIId = uriId;
}


void XMLAttr::setValue(const XMLCh* const newValue)
{
    const unsigned int newLen = XMLString::stringLen(newValue);
    if (!fValueBufSz || (newLen > fValueBufSz))
    {
        delete [] fValue;
        fValueBufSz = newLen + 8;
        fValue = new XMLCh[fValueBufSz + 1];
    }
    XMLString::moveChars(fValue, newValue, newLen + 1);
}


// ---------------------------------------------------------------------------
//  XMLAttr: Private, helper methods
// ---------------------------------------------------------------------------
void XMLAttr::cleanUp()
{
    delete [] fName;
    delete [] fPrefix;
    delete [] fQName;
    delete [] fValue;
}
