From c99e415087a36c198765c037ca608086faf4ca07 Mon Sep 17 00:00:00 2001
From: Adam Wardynski <award@.(B-4.4.46a)>
Date: Thu, 13 Jan 2011 12:07:05 +0100
Subject: [PATCH] Relabel Action, replacing POS for lexemes meeting a
condition.
---
libwccl/CMakeLists.txt | 1 +
libwccl/ops/actions/relabel.cpp | 45 +++++++++++++++++++++
libwccl/ops/actions/relabel.h | 72 +++++++++++++++++++++++++++++++++
3 files changed, 118 insertions(+)
create mode 100644 libwccl/ops/actions/relabel.cpp
create mode 100644 libwccl/ops/actions/relabel.h
diff --git a/libwccl/CMakeLists.txt b/libwccl/CMakeLists.txt
index f09edd8..3d265a8 100644
--- a/libwccl/CMakeLists.txt
+++ b/libwccl/CMakeLists.txt
@@ -29,6 +29,7 @@ SET(libwccl_STAT_SRC
exception.cpp
ops/action.cpp
ops/actions/delete.cpp
+ ops/actions/relabel.cpp
ops/actions/select.cpp
ops/formatters.cpp
ops/functions/bool/iteration.cpp
diff --git a/libwccl/ops/actions/relabel.cpp b/libwccl/ops/actions/relabel.cpp
new file mode 100644
index 0000000..46a7ed4
--- /dev/null
+++ b/libwccl/ops/actions/relabel.cpp
@@ -0,0 +1,45 @@
+#include <libwccl/ops/actions/relabel.h>
+#include <libpwrutils/foreach.h>
+#include <sstream>
+
+namespace Wccl {
+
+Bool Relabel::execute(const ActionExecContext& context) const
+{
+ Bool changed(false);
+ Corpus2::mask_t replace_wclass = replace_with_->apply(context)->get_value().get_pos();
+ int abs_pos = context.sentence_context().get_abs_position(*pos_->apply(context));
+ if (context.sentence_context().is_inside(abs_pos)) {
+ Corpus2::Token& token = *context.sentence_context().at(abs_pos);
+ std::vector<Corpus2::Lexeme> original(token.lexemes());
+ token.lexemes().clear();
+ foreach (Corpus2::Lexeme& lexeme, original) {
+ token.add_lexeme(lexeme);
+ if (condition_->apply(context)->get_value()) {
+ changed.set_value(true);
+ lexeme.set_tag(Corpus2::Tag(replace_wclass, lexeme.tag().get_values()));
+ }
+ token.lexemes().pop_back();
+ }
+ token.lexemes() = original;
+ }
+ return changed;
+}
+
+std::string Relabel::to_string(const Corpus2::Tagset& tagset) const
+{
+ std::ostringstream os;
+ os << name() << "(" << pos_->to_string(tagset) << ", "
+ << replace_with_->to_string(tagset) << ", "
+ << condition_->to_string(tagset) << ")";
+ return os.str();
+}
+
+std::ostream& Relabel::write_to(std::ostream& os) const
+{
+ os << name() << "(" << *pos_ << ", " << *replace_with_ << ", " << *condition_ << ")";
+ return os;
+}
+
+
+} /* end ns Wccl */
diff --git a/libwccl/ops/actions/relabel.h b/libwccl/ops/actions/relabel.h
new file mode 100644
index 0000000..79baa93
--- /dev/null
+++ b/libwccl/ops/actions/relabel.h
@@ -0,0 +1,72 @@
+#ifndef LIBWCCL_OPS_RELABEL_DELETE_H
+#define LIBWCCL_OPS_RELABEL_DELETE_H
+
+#include <libwccl/ops/action.h>
+#include <libwccl/values/position.h>
+#include <libwccl/values/bool.h>
+#include <libwccl/ops/function.h>
+
+namespace Wccl {
+
+/**
+ * Action to change part of speech for lexemes that meet a condition.
+ */
+class Relabel : public Action
+{
+public:
+ typedef boost::shared_ptr<Function<Position> > PosFunctionPtr;
+ typedef boost::shared_ptr<Function<Bool> > BoolFunctionPtr;
+ typedef boost::shared_ptr<Function<TSet> > TSetFunctionPtr;
+
+ Relabel(
+ const TSetFunctionPtr& replace_with,
+ const BoolFunctionPtr& condition,
+ const PosFunctionPtr& pos = detail::CurrentPos())
+ : pos_(pos),
+ condition_(condition),
+ replace_with_(replace_with)
+ {
+ BOOST_ASSERT(pos_);
+ BOOST_ASSERT(condition_);
+ BOOST_ASSERT(replace_with_);
+ }
+
+ /**
+ * @returns Name of the function.
+ */
+ std::string name() const {
+ return "relabel";
+ }
+
+ /**
+ * @returns String representation of the Action
+ */
+ std::string to_string(const Corpus2::Tagset& tagset) const;
+
+protected:
+ /**
+ * Writes string representation of the Action to
+ * an output stream.
+ * @returns Stream written to.
+ * @note May be incomplete and/or containt internal info.
+ */
+ std::ostream& write_to(std::ostream& ostream) const;
+
+ /**
+ * Executes the Action on given context: for all lexemes
+ * that meet given condition, change their part of speech
+ * to the part of speech given by provided TSet function.
+ * No action is done if position points outside sentence.
+ * @returns True if there were any changes made; False otherwise
+ */
+ Bool execute(const ActionExecContext &context) const;
+
+private:
+ const PosFunctionPtr pos_;
+ const BoolFunctionPtr condition_;
+ const TSetFunctionPtr replace_with_;
+};
+
+} /* end ns Wccl */
+
+#endif // LIBWCCL_OPS_RELABEL_DELETE_H
--
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