simple swig icu UnicodeString wrapper with __str__, __unicode__ and length()

swig/corpus2.i

@@ -4,6 +4,7 @@
 %module corpus2
 
 %include "boost_shared_ptr.i"
+%include "unicodestring.i"
 %include "libcorpus2exception.i"
 %include "libcorpusannotatedsentence.i"
 %include "libcorpusannotationchannel.i"

swig/unicodestring.i

+#ifndef SWIG_UNICODESTRING_I
+#define SWIG_UNICODESTRING_I
+
+%module unicodestring
+%{
+  #include <unicode/unistr.h>
+%} 
+
+%include "std_string.i"
+%include "std_except.i"
+
+
+class UnicodeString {
+  public:
+    int length();
+    UChar* getBuffer();
+    UChar* getTerminatedBuffer();
+
+%pythoncode %{
+	def __unicode__(self):
+		return self.as_utf16().decode('utf16')
+
+	def __str__(self):
+		return self.as_utf8()
+%}
+
+};
+
+%extend UnicodeString {
+    std::string as_utf16() {
+        return std::string((char*)self->getTerminatedBuffer(), self->length()*2);
+    }
+
+	std::string as_utf8() {
+		std::string r;
+		self->toUTF8String(r);
+		return r;
+	}
+}
+
+
+#endif /* SWIG_UNICODESTRING_I */