Delete and Select actions (WIP, not implemented).

libwccl/CMakeLists.txt

@@ -28,6 +28,8 @@ endif(WIN32)
 SET(libwccl_STAT_SRC
 	exception.cpp
 	ops/action.cpp
+	ops/actions/delete.cpp
+	ops/actions/select.cpp
 	ops/formatters.cpp
 	ops/functions/bool/iteration.cpp
 	ops/functions/bool/iterations/atleast.cpp

libwccl/ops/actions/delete.cpp

+#include <libwccl/ops/actions/delete.h>
+#include <libwccl/ops/functions/constant.h>
+#include <sstream>
+
+namespace Wccl {
+
+Bool Delete::execute(const ActionExecContext& context) const
+{
+	Bool changed(false);
+	//@todo: implement
+	return changed;
+}
+
+std::string Delete::to_string(const Corpus2::Tagset& tagset) const
+{
+	std::ostringstream os;
+	os << name() << "(" << pos_->to_string(tagset) << ", "
+			<< condition_->to_string(tagset) << ")";
+	return os.str();
+}
+
+std::ostream& Delete::write_to(std::ostream& os) const
+{
+	os << name() << "(" << *pos_ << ", " << *condition_ << ")";
+	return os;
+}
+
+
+} /* end ns Wccl */

libwccl/ops/actions/delete.h

+#ifndef LIBWCCL_OPS_ACTIONS_DELETE_H
+#define LIBWCCL_OPS_ACTIONS_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 delete lexemes that meet a condition
+ * (unless no lexemes would be left, in which case
+ * token is left alone with no changes)
+ */
+class Delete : public Action
+{
+public:
+	typedef boost::shared_ptr<Function<Position> > PosFunctionPtr;
+	typedef boost::shared_ptr<Function<Bool> > BoolFunctionPtr;
+
+	Delete(const BoolFunctionPtr& condition, const PosFunctionPtr& pos = detail::CurrentPos())
+		: pos_(pos),
+		  condition_(condition)
+	{
+		BOOST_ASSERT(pos_);
+		BOOST_ASSERT(condition_);
+	}
+
+	/**
+	 * @returns Name of the function.
+	 */
+	std::string name() const {
+		return "delete";
+	}
+
+	/**
+	 * @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: it deletes
+	 * all lexemes of the token at given position that meet
+	 * the condition, unless all of them meet the condition.
+	 * In such case no action is commited to avoid a token
+	 * that would otherwise have no lexemes remaining.
+	 * Also, 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_;
+};
+
+} /* end ns Wccl */
+
+#endif // LIBWCCL_OPS_ACTIONS_DELETE_H

libwccl/ops/actions/select.cpp

+#include <libwccl/ops/actions/select.h>
+#include <libwccl/ops/functions/constant.h>
+#include <sstream>
+
+namespace Wccl {
+
+Bool Select::execute(const ActionExecContext& context) const
+{
+	Bool changed(false);
+	//@todo: implement
+	return changed;
+}
+
+std::string Select::to_string(const Corpus2::Tagset& tagset) const
+{
+	std::ostringstream os;
+	os << name() << "(" << pos_->to_string(tagset) << ", "
+			<< condition_->to_string(tagset) << ")";
+	return os.str();
+}
+
+std::ostream& Select::write_to(std::ostream& os) const
+{
+	os << name() << "(" << *pos_ << ", " << *condition_ << ")";
+	return os;
+}
+
+
+} /* end ns Wccl */

libwccl/ops/actions/select.h

+#ifndef LIBWCCL_OPS_ACTIONS_SELECT_H
+#define LIBWCCL_OPS_ACTIONS_SELECT_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 keep only lexemes that meet a condition
+ * (unless no lexemes would be left, in which case
+ * token is left alone with no changes)
+ */
+class Select : public Action
+{
+public:
+	typedef boost::shared_ptr<Function<Position> > PosFunctionPtr;
+	typedef boost::shared_ptr<Function<Bool> > BoolFunctionPtr;
+
+	Select(const BoolFunctionPtr& condition, const PosFunctionPtr& pos = detail::CurrentPos())
+		: pos_(pos),
+		  condition_(condition)
+	{
+		BOOST_ASSERT(pos_);
+		BOOST_ASSERT(condition_);
+	}
+
+	/**
+	 * @returns Name of the function.
+	 */
+	std::string name() const {
+		return "select";
+	}
+
+	/**
+	 * @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: it deletes
+	 * all lexemes of the token at given position that do not meet
+	 * the condition, unless none of them meets the condition.
+	 * In such case no action is commited to avoid a token
+	 * that would otherwise have no lexemes remaining.
+	 * Also, 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_;
+};
+
+} /* end ns Wccl */
+
+#endif // LIBWCCL_OPS_ACTIONS_SELECT_H