/// <summary>
/// Get a list of external variables used by the expression. This will include both variables that were explicitly
/// declared to the <c>XPathCompiler</c>, and (if the <c>AllowUndeclaredVariables</c> option was set) variables that
/// are referenced within the expression but not explicitly declared.
/// </summary>
/// <returns>
/// An IEnumerator over the names of the external variables, as instances of <c>QName</c>.</returns>
public IEnumerator EnumerateExternalVariables()
{
ArrayList list = new ArrayList();
JIterator iter = env.iterateExternalVariables();
while (iter.hasNext())
{
JXPathVariable var = (JXPathVariable)iter.next();
JStructuredQName q = var.getVariableQName();
list.Add(new QName(q.getPrefix(), q.getURI(), q.getLocalPart()));
}
return(list.GetEnumerator());
}
internal JReceiver GetReceiver(Serializer serializer)
{
net.sf.saxon.expr.instruct.Executable executable = exp.getExecutable();
JConfiguration config = executable.getConfiguration();
JPipelineConfiguration pipe = config.makePipelineConfiguration();
pipe.setHostLanguage(executable.getHostLanguage());
JProperties baseProps = new JProperties(executable.getDefaultOutputProperties());
JCharacterMapIndex charMapIndex = executable.getCharacterMapIndex();
JCharacterMapIndex characterMap = serializer.GetCharacterMap();
if (charMapIndex.isEmpty())
{
charMapIndex = characterMap;
}
else if (characterMap != null && !characterMap.isEmpty() && charMapIndex != characterMap)
{
// Merge the character maps
java.util.Iterator mapIter = characterMap.iterator();
while (mapIter.hasNext())
{
net.sf.saxon.serialize.CharacterMap map = (net.sf.saxon.serialize.CharacterMap)mapIter.next();
charMapIndex.putCharacterMap(map.getName(), map);
}
}
JProperties properties = serializer.GetOutputProperties();
object [] propSet = properties.entrySet().toArray();
for (int i = 0; i < properties.size(); i++)
{
java.util.Map.Entry entry = (java.util.Map.Entry)propSet[i];
net.sf.saxon.om.StructuredQName name = net.sf.saxon.om.StructuredQName.fromClarkName((String)entry.getKey());
net.sf.saxon.expr.instruct.ResultDocument.setSerializationProperty(
baseProps, name.getURI(), name.getLocalPart(), (String)entry.getValue(), null, true, config);
}
serializer.SetDefaultOutputProperties(baseProps);
serializer.SetCharacterMap(charMapIndex);
JReceiver target = serializer.GetReceiver(pipe);
return(target);
}