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using Gee;
namespace Xmpp {
public class NamespaceState {
private HashMap<string, string> uri_to_name = new HashMap<string, string> ();
private HashMap<string, string> name_to_uri = new HashMap<string, string> ();
public string current_ns_uri;
private NamespaceState parent;
public NamespaceState() {
add_assoc(XMLNS_URI, "xmlns");
add_assoc(XML_URI, "xml");
current_ns_uri = XML_URI;
}
public NamespaceState.for_stanza() {
this();
add_assoc("http://etherx.jabber.org/streams", "stream");
current_ns_uri = "jabber:client";
}
private NamespaceState.copy(NamespaceState old) {
foreach (string key in old.uri_to_name.keys) {
add_assoc(key, old.uri_to_name[key]);
}
set_current(old.current_ns_uri);
}
private NamespaceState.with_parent(NamespaceState parent) {
this.copy(parent);
this.parent = parent;
}
public NamespaceState.with_assoc(NamespaceState old, string ns_uri, string name) {
this.copy(old);
add_assoc(ns_uri, name);
}
public NamespaceState.with_current(NamespaceState old, string current_ns_uri) {
this.copy(old);
set_current(current_ns_uri);
}
public void add_assoc(string ns_uri, string name) {
name_to_uri[name] = ns_uri;
uri_to_name[ns_uri] = name;
}
public void set_current(string current_ns_uri) {
this.current_ns_uri = current_ns_uri;
}
public string find_name(string ns_uri) throws IOError {
if (uri_to_name.has_key(ns_uri)) {
return uri_to_name[ns_uri];
}
throw new IOError.INVALID_DATA(@"XML: NS URI $ns_uri not found.");
}
public string find_uri(string name) throws IOError {
if (name_to_uri.has_key(name)) {
return name_to_uri[name];
}
throw new IOError.INVALID_DATA(@"XML: NS name $name not found.");
}
public NamespaceState push() {
return new NamespaceState.with_parent(this);
}
public NamespaceState pop() {
return parent;
}
public string to_string() {
StringBuilder sb = new StringBuilder ();
sb.append ("NamespaceState{");
foreach (string key in uri_to_name.keys) {
sb.append(key);
sb.append_c('=');
sb.append(uri_to_name[key]);
sb.append_c(',');
}
sb.append("current=");
sb.append(current_ns_uri);
sb.append_c('}');
return sb.str;
}
}
}
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