From 098e822150c30b9b3335a3a26190ed0d1f168f79 Mon Sep 17 00:00:00 2001
From: Adam Wardynski <award@.(win7-laptop)>
Date: Tue, 5 Apr 2011 12:48:11 +0200
Subject: [PATCH] first(), last() ops: Position of first/last token of a Match.
---
libwccl/CMakeLists.txt | 2 +
libwccl/ops/functions/position/firsttoken.cpp | 39 +++++++++++++
libwccl/ops/functions/position/firsttoken.h | 56 +++++++++++++++++++
libwccl/ops/functions/position/lasttoken.cpp | 38 +++++++++++++
libwccl/ops/functions/position/lasttoken.h | 56 +++++++++++++++++++
5 files changed, 191 insertions(+)
create mode 100644 libwccl/ops/functions/position/firsttoken.cpp
create mode 100644 libwccl/ops/functions/position/firsttoken.h
create mode 100644 libwccl/ops/functions/position/lasttoken.cpp
create mode 100644 libwccl/ops/functions/position/lasttoken.h
diff --git a/libwccl/CMakeLists.txt b/libwccl/CMakeLists.txt
index 4e2017b..fd26bba 100644
--- a/libwccl/CMakeLists.txt
+++ b/libwccl/CMakeLists.txt
@@ -44,6 +44,8 @@ SET(libwccl_STAT_SRC
ops/functions/bool/predicates/regex.cpp
ops/functions/bool/predicates/strongagreement.cpp
ops/functions/bool/predicates/weakagreement.cpp
+ ops/functions/position/firsttoken.cpp
+ ops/functions/position/lasttoken.cpp
ops/functions/position/relativeposition.cpp
ops/functions/strset/affix.cpp
ops/functions/strset/getlemmas.cpp
diff --git a/libwccl/ops/functions/position/firsttoken.cpp b/libwccl/ops/functions/position/firsttoken.cpp
new file mode 100644
index 0000000..8c90075
--- /dev/null
+++ b/libwccl/ops/functions/position/firsttoken.cpp
@@ -0,0 +1,39 @@
+#include <libwccl/ops/functions/position/firsttoken.h>
+#include <libwccl/ops/functions/constant.h>
+#include <libwccl/exception.h>
+
+#include <sstream>
+
+namespace Wccl {
+
+FirstToken::BaseRetValPtr FirstToken::apply_internal(
+ const FunExecContext &context) const
+{
+ boost::shared_ptr<Corpus2::AnnotatedSentence> s =
+ boost::dynamic_pointer_cast<Corpus2::AnnotatedSentence>(
+ context.sentence_context().get_sentence_ptr());
+ if (!s) {
+ throw InvalidArgument(
+ "context",
+ "Supplied context does not have valid Corpus2::AnnotatedSentence.");
+ }
+ const Function<Match>::RetValPtr match = match_expr_->apply(context);
+ if(match->empty()) {
+ return detail::DefaultFunction<Position>()->apply(context);
+ }
+ return boost::make_shared<Position>(match->first_token(s));
+}
+
+std::string FirstToken::to_string(const Corpus2::Tagset &tagset) const
+{
+ std::ostringstream ostream;
+ ostream << name(tagset) << "(" << match_expr_->to_string(tagset) << ")";
+ return ostream.str();
+}
+
+std::ostream& FirstToken::write_to(std::ostream& ostream) const
+{
+ return ostream << raw_name() << "(" << *match_expr_ << ")";
+}
+
+} /* end ns Wccl */
diff --git a/libwccl/ops/functions/position/firsttoken.h b/libwccl/ops/functions/position/firsttoken.h
new file mode 100644
index 0000000..3081574
--- /dev/null
+++ b/libwccl/ops/functions/position/firsttoken.h
@@ -0,0 +1,56 @@
+#ifndef LIBWCCL_OPS_FUNCTIONS_POSITION_FIRSTTOKEN_H
+#define LIBWCCL_OPS_FUNCTIONS_POSITION_FIRSTTOKEN_H
+
+#include <libwccl/ops/function.h>
+#include <libwccl/values/match.h>
+
+namespace Wccl {
+
+/**
+ * Operator that takes a Match and returns Position of the first token
+ * within the given Match.
+ */
+class FirstToken : public Function<Position>
+{
+public:
+ typedef boost::shared_ptr<Function<Match> > MatchFunctionPtr;
+
+ FirstToken(const MatchFunctionPtr& match_expr)
+ : match_expr_(match_expr)
+ {
+ BOOST_ASSERT(match_expr_);
+ }
+
+ /**
+ * @returns String representation of the function
+ */
+ std::string to_string(const Corpus2::Tagset& tagset) const;
+
+ /**
+ * @returns Name of the function
+ */
+ std::string raw_name() const {
+ return "first";
+ }
+
+protected:
+ const MatchFunctionPtr match_expr_;
+
+ /**
+ * Writes string representation of the function
+ * @returns Stream written to.
+ */
+ std::ostream& write_to(std::ostream& ostream) const;
+
+ /**
+ * Takes the value of a Match from argument expression, and returns
+ * a Position that corresponds to first token of the given Match.
+ * @returns Position corresponding to first token of a Match.
+ * Nowhere in case of an empty Match.
+ */
+ BaseRetValPtr apply_internal(const FunExecContext& context) const;
+};
+
+} /* end ns Wccl */
+
+#endif // LIBWCCL_OPS_FUNCTIONS_POSITION_FIRSTTOKEN_H
diff --git a/libwccl/ops/functions/position/lasttoken.cpp b/libwccl/ops/functions/position/lasttoken.cpp
new file mode 100644
index 0000000..6d4ca00
--- /dev/null
+++ b/libwccl/ops/functions/position/lasttoken.cpp
@@ -0,0 +1,38 @@
+#include <libwccl/ops/functions/position/lasttoken.h>
+#include <libwccl/ops/functions/constant.h>
+#include <libwccl/exception.h>
+#include <sstream>
+
+namespace Wccl {
+
+LastToken::BaseRetValPtr LastToken::apply_internal(
+ const FunExecContext &context) const
+{
+ boost::shared_ptr<Corpus2::AnnotatedSentence> s =
+ boost::dynamic_pointer_cast<Corpus2::AnnotatedSentence>(
+ context.sentence_context().get_sentence_ptr());
+ if (!s) {
+ throw InvalidArgument(
+ "context",
+ "Supplied context does not have valid Corpus2::AnnotatedSentence.");
+ }
+ const Function<Match>::RetValPtr match = match_expr_->apply(context);
+ if(match->empty()) {
+ return detail::DefaultFunction<Position>()->apply(context);
+ }
+ return boost::make_shared<Position>(match->last_token(s));
+}
+
+std::string LastToken::to_string(const Corpus2::Tagset &tagset) const
+{
+ std::ostringstream ostream;
+ ostream << name(tagset) << "(" << match_expr_->to_string(tagset) << ")";
+ return ostream.str();
+}
+
+std::ostream& LastToken::write_to(std::ostream& ostream) const
+{
+ return ostream << raw_name() << "(" << *match_expr_ << ")";
+}
+
+} /* end ns Wccl */
diff --git a/libwccl/ops/functions/position/lasttoken.h b/libwccl/ops/functions/position/lasttoken.h
new file mode 100644
index 0000000..995949e
--- /dev/null
+++ b/libwccl/ops/functions/position/lasttoken.h
@@ -0,0 +1,56 @@
+#ifndef LIBWCCL_OPS_FUNCTIONS_POSITION_LASTTOKEN_H
+#define LIBWCCL_OPS_FUNCTIONS_POSITION_LASTTOKEN_H
+
+#include <libwccl/ops/function.h>
+#include <libwccl/values/match.h>
+
+namespace Wccl {
+
+/**
+ * Operator that takes a Match and returns Position of the last token
+ * within the given Match.
+ */
+class LastToken : public Function<Position>
+{
+public:
+ typedef boost::shared_ptr<Function<Match> > MatchFunctionPtr;
+
+ LastToken(const MatchFunctionPtr& match_expr)
+ : match_expr_(match_expr)
+ {
+ BOOST_ASSERT(match_expr_);
+ }
+
+ /**
+ * @returns String representation of the function
+ */
+ std::string to_string(const Corpus2::Tagset& tagset) const;
+
+ /**
+ * @returns Name of the function
+ */
+ std::string raw_name() const {
+ return "last";
+ }
+
+protected:
+ const MatchFunctionPtr match_expr_;
+
+ /**
+ * Writes string representation of the function
+ * @returns Stream written to.
+ */
+ std::ostream& write_to(std::ostream& ostream) const;
+
+ /**
+ * Takes the value of a Match from argument expression, and returns
+ * a Position that corresponds to the last token of the given Match.
+ * @returns Position corresponding to the last token of a Match.
+ * Nowhere in case of an empty Match.
+ */
+ BaseRetValPtr apply_internal(const FunExecContext& context) const;
+};
+
+} /* end ns Wccl */
+
+#endif // LIBWCCL_OPS_FUNCTIONS_POSITION_LASTTOKEN_H
--
GitLab