QByteArray to new QDomDocument

Hi all,

I'm having an issue and most likely I am doing this the wrong way but wondered if anyone could help.

Basically I want to take an exiting xml document, query it using xquery/xpath, and create a new xml document. Here's what I have so far:

XML

Code:

---

<?xml version="1.0"?>
<catalog>
   <book id="bk101">
      <author>Gambardella, Matthew</author>
      <title>XML Developer's Guide</title>
      <genre>Computer</genre>
      <price>44.95</price>
      <publish_date>2000-10-01</publish_date>
      <description>An in-depth look at creating applications 
      with XML.</description>
   </book>
   <book id="bk102">
      <author>Ralls, Kim</author>
      <title>Midnight Rain</title>
      <genre>Fantasy</genre>
      <price>5.95</price>
      <publish_date>2000-12-16</publish_date>
      <description>A former architect battles corporate zombies, 
      an evil sorceress, and her own childhood to become queen 
      of the world.</description>
   </book>
   <book id="bk103">
      <author>Corets, Eva</author>
      <title>Maeve Ascendant</title>
      <genre>Fantasy</genre>
      <price>5.95</price>
      <publish_date>2000-11-17</publish_date>
      <description>After the collapse of a nanotechnology 
      society in England, the young survivors lay the 
      foundation for a new society.</description>
   </book>
   <book id="bk104">
      <author>Corets, Eva</author>
      <title>Oberon's Legacy</title>
      <genre>Fantasy</genre>
      <price>5.95</price>
      <publish_date>2001-03-10</publish_date>
      <description>In post-apocalypse England, the mysterious 
      agent known only as Oberon helps to create a new life 
      for the inhabitants of London. Sequel to Maeve 
      Ascendant.</description>
   </book>
   <book id="bk105">
      <author>Corets, Eva</author>
      <title>The Sundered Grail</title>
      <genre>Fantasy</genre>
      <price>5.95</price>
      <publish_date>2001-09-10</publish_date>
      <description>The two daughters of Maeve, half-sisters, 
      battle one another for control of England. Sequel to 
      Oberon's Legacy.</description>
   </book>
   <book id="bk106">
      <author>Randall, Cynthia</author>
      <title>Lover Birds</title>
      <genre>Romance</genre>
      <price>4.95</price>
      <publish_date>2000-09-02</publish_date>
      <description>When Carla meets Paul at an ornithology 
      conference, tempers fly as feathers get ruffled.</description>
   </book>
   <book id="bk107">
      <author>Thurman, Paula</author>
      <title>Splish Splash</title>
      <genre>Romance</genre>
      <price>4.95</price>
      <publish_date>2000-11-02</publish_date>
      <description>A deep sea diver finds true love twenty 
      thousand leagues beneath the sea.</description>
   </book>
   <book id="bk108">
      <author>Knorr, Stefan</author>
      <title>Creepy Crawlies</title>
      <genre>Horror</genre>
      <price>4.95</price>
      <publish_date>2000-12-06</publish_date>
      <description>An anthology of horror stories about roaches,
      centipedes, scorpions  and other insects.</description>
   </book>
   <book id="bk109">
      <author>Kress, Peter</author>
      <title>Paradox Lost</title>
      <genre>Science Fiction</genre>
      <price>6.95</price>
      <publish_date>2000-11-02</publish_date>
      <description>After an inadvertant trip through a Heisenberg
      Uncertainty Device, James Salway discovers the problems 
      of being quantum.</description>
   </book>
   <book id="bk110">
      <author>O'Brien, Tim</author>
      <title>Microsoft .NET: The Programming Bible</title>
      <genre>Computer</genre>
      <price>36.95</price>
      <publish_date>2000-12-09</publish_date>
      <description>Microsoft's .NET initiative is explored in 
      detail in this deep programmer's reference.</description>
   </book>
   <book id="bk111">
      <author>O'Brien, Tim</author>
      <title>MSXML3: A Comprehensive Guide</title>
      <genre>Computer</genre>
      <price>36.95</price>
      <publish_date>2000-12-01</publish_date>
      <description>The Microsoft MSXML3 parser is covered in 
      detail, with attention to XML DOM interfaces, XSLT processing, 
      SAX and more.</description>
   </book>
   <book id="bk112">
      <author>Galos, Mike</author>
      <title>Visual Studio 7: A Comprehensive Guide</title>
      <genre>Computer</genre>
      <price>49.95</price>
      <publish_date>2001-04-16</publish_date>
      <description>Microsoft Visual Studio 7 is explored in depth,looking at how Visual Basic, Visual C++, C#, and ASP+  environment.</description>
   </book>
</catalog>

---

Here's the code:

Code:

---

QFile file("books.xml");
    QDomDocument doc("books");
 
    if (!file.open(QIODevice::ReadOnly | QIODevice::Text))
        return 0;
    if (!doc.setContent(&file)) {
        file.close();
        return 0;
    }
    file.close();
 
    QByteArray outArray;
    QBuffer buffer(&outArray);
    buffer.open(QIODevice::ReadWrite);
 
    QByteArray inArray = doc.toByteArray();
    QBuffer inBuffer(&inArray);
    inBuffer.open(QIODevice::ReadOnly);
 
    QXmlQuery qry(QXmlQuery::XQuery10);
 
    qry.setFocus(&inBuffer);
    qry.setQuery("/catalog/book/price");
 
    if (qry.isValid()){
        qry.evaluateTo(&buffer);
     }
 
    cout << QString::fromUtf8(outArray.constData()).toStdString() << endl;
 
    QDomDocument newDoc;
    QDomNode xml = newDoc.createProcessingInstruction("xml", "version=\"1.0\"");
 
    QDomElement newRoot = newDoc.createElement("records");
 
    QDomDocument otherDoc;
 
    QString errorMsg;
    int errorLine;
    int errorColumn;
 
    if (!otherDoc.setContent(outArray, &errorMsg, &errorLine))
        cout << errorMsg.toStdString() << ' ' << errorLine << ':' << errorColumn << endl;
 
    newRoot.appendChild(otherDoc);
 
    newDoc.appendChild(xml);
    newDoc.appendChild(newRoot);
 
    cout << newDoc.toString().toStdString() << endl;
 
    buffer.close();
    inBuffer.close();

---

And here's the output:
<price>44.95</price><price>5.95</price><price>5.95</price><price>5.95</price><price>5.95</price><price>4.95</price><price>4.95</price><price>4.95</price><price>6.95</price><price>36.95</price><price>36.95</price><price>49.95</price>
unexpected character 1:-1073743404
<?xml version="1.0"?>
<records>
<price>44.95</price>
</records>


Any help is greatly appreciated!

-ck