From 710ff253caec4dce83e888a499958e7ff643f9dc Mon Sep 17 00:00:00 2001
From: Adam Wardynski <award@.(win7-laptop)>
Date: Fri, 29 Apr 2011 18:41:49 +0200
Subject: [PATCH] lex() operator, to translate strings via a lexicon.
---
libwccl/CMakeLists.txt | 1 +
.../ops/functions/strset/lextranslator.cpp | 28 ++++++++++
libwccl/ops/functions/strset/lextranslator.h | 55 +++++++++++++++++++
3 files changed, 84 insertions(+)
create mode 100644 libwccl/ops/functions/strset/lextranslator.cpp
create mode 100644 libwccl/ops/functions/strset/lextranslator.h
diff --git a/libwccl/CMakeLists.txt b/libwccl/CMakeLists.txt
index 7d27222..165786b 100644
--- a/libwccl/CMakeLists.txt
+++ b/libwccl/CMakeLists.txt
@@ -56,6 +56,7 @@ SET(libwccl_STAT_SRC
ops/functions/strset/affix.cpp
ops/functions/strset/getlemmas.cpp
ops/functions/strset/getorth.cpp
+ ops/functions/strset/lextranslator.cpp
ops/functions/strset/tolower.cpp
ops/functions/strset/toupper.cpp
ops/functions/tset/agrfilter.cpp
diff --git a/libwccl/ops/functions/strset/lextranslator.cpp b/libwccl/ops/functions/strset/lextranslator.cpp
new file mode 100644
index 0000000..424520b
--- /dev/null
+++ b/libwccl/ops/functions/strset/lextranslator.cpp
@@ -0,0 +1,28 @@
+#include <libwccl/ops/functions/strset/lextranslator.h>
+#include <sstream>
+
+namespace Wccl {
+
+std::string LexTranslator::to_string(const Corpus2::Tagset& tagset) const
+{
+ std::ostringstream os;
+ os << name(tagset) << "("
+ << strset_expr_->to_string(tagset) << ", \""
+ << lexicon_->name() << "\")";
+ return os.str();
+}
+
+std::ostream& LexTranslator::write_to(std::ostream& os) const
+{
+ os << raw_name() << "(" << *strset_expr_ << ", \"" << lexicon_->name() << "\")";
+ return os;
+}
+
+LexTranslator::BaseRetValPtr LexTranslator::apply_internal(
+ const FunExecContext& context) const
+{
+ boost::shared_ptr<const StrSet> set = strset_expr_->apply(context);
+ return lexicon_->translate(*set);
+}
+
+} /* end ns Wccl */
diff --git a/libwccl/ops/functions/strset/lextranslator.h b/libwccl/ops/functions/strset/lextranslator.h
new file mode 100644
index 0000000..4cfab9d
--- /dev/null
+++ b/libwccl/ops/functions/strset/lextranslator.h
@@ -0,0 +1,55 @@
+#ifndef LIBWCCL_OPS_FUNCTIONS_STRSET_LEXTRANSLATOR_H
+#define LIBWCCL_OPS_FUNCTIONS_STRSET_LEXTRANSLATOR_H
+
+#include <libwccl/values/strset.h>
+#include <libwccl/ops/function.h>
+#include <libwccl/lexicon/lexicon.h>
+
+namespace Wccl {
+
+/**
+ * WCCL functional operator "lex", translates strings via a lexicon.
+ */
+class LexTranslator : public Function<StrSet>
+{
+public:
+ LexTranslator(
+ const boost::shared_ptr<Function<StrSet> >& strset_expr,
+ const boost::shared_ptr<const Lexicon>& lexicon)
+ : strset_expr_(strset_expr),
+ lexicon_(lexicon)
+ {
+ BOOST_ASSERT(strset_expr_);
+ BOOST_ASSERT(lexicon_);
+ }
+
+ /**
+ * @returns String representation of the function in the form of
+ */
+ std::string to_string(const Corpus2::Tagset& tagset) const;
+
+ /**
+ * @returns Name of the function
+ */
+ std::string raw_name() const {
+ return "orth";
+ }
+protected:
+ std::ostream& write_to(std::ostream& os) const;
+
+ /**
+ * Get a string set from the argument expression and return a copy,
+ * translated using the lexicon given at construction. Strings that don't
+ * exist in the lexicon are removed from output, whereas strings that
+ * exist as keys are replaced with corresponding values.
+ */
+ BaseRetValPtr apply_internal(const FunExecContext& context) const;
+
+private:
+ const boost::shared_ptr<Function<StrSet> > strset_expr_;
+ const boost::shared_ptr<const Lexicon> lexicon_;
+};
+
+} /* end ns Wccl */
+
+#endif // LIBWCCL_OPS_FUNCTIONS_STRSET_LEXTRANSLATOR_H
--
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