From f886a617cb2ac74f24a782d978d691d8285b50f7 Mon Sep 17 00:00:00 2001
From: Adam Wardynski <award@.(B-4.4.46a)>
Date: Fri, 11 Mar 2011 16:26:41 +0100
Subject: [PATCH] MatchOperator - operator for match rules.
---
libwccl/CMakeLists.txt | 1 +
libwccl/ops/match/matchoperator.cpp | 56 ++++++++++++++++++++++++++
libwccl/ops/match/matchoperator.h | 61 +++++++++++++++++++++++++++++
3 files changed, 118 insertions(+)
create mode 100644 libwccl/ops/match/matchoperator.cpp
create mode 100644 libwccl/ops/match/matchoperator.h
diff --git a/libwccl/CMakeLists.txt b/libwccl/CMakeLists.txt
index 09413f3..f868a40 100644
--- a/libwccl/CMakeLists.txt
+++ b/libwccl/CMakeLists.txt
@@ -55,6 +55,7 @@ SET(libwccl_STAT_SRC
ops/functions/tset/getsymbols.cpp
ops/functions/tset/getsymbolsinrange.cpp
ops/match/conditions/tokencondition.cpp
+ ops/match/matchoperator.cpp
ops/rulesequence.cpp
ops/tagaction.cpp
ops/tagactions/delete.cpp
diff --git a/libwccl/ops/match/matchoperator.cpp b/libwccl/ops/match/matchoperator.cpp
new file mode 100644
index 0000000..f18a8e2
--- /dev/null
+++ b/libwccl/ops/match/matchoperator.cpp
@@ -0,0 +1,56 @@
+#include <libwccl/ops/match/matchoperator.h>
+#include <libpwrutils/foreach.h>
+#include <sstream>
+
+namespace Wccl {
+
+const char* MatchOperator::IterationPosVarName = "$_";
+
+boost::shared_ptr<MatchVector> MatchOperator::execute(
+ boost::shared_ptr<Position> iter_pos,
+ const ActionExecContext &context) const
+{
+ boost::shared_ptr<MatchVector> matches(new MatchVector());
+ int orig_iter_pos = iter_pos->get_value();
+
+ foreach (const boost::shared_ptr<const MatchCondition>& cond, _conditions) {
+ MatchResult res = cond->apply(iter_pos, context);
+ if(res.matched()) {
+ matches->append(res.get_match());
+ } else {
+ matches.reset(new MatchVector());
+ iter_pos->set_value(orig_iter_pos + 1);
+ return matches;
+ }
+ }
+ return matches;
+}
+
+std::string MatchOperator::to_string(const Corpus2::Tagset& tagset) const
+{
+ std::ostringstream ostream;
+ ostream << name() << "(";
+ for(size_t i = 0; i < _conditions.size(); ++i) {
+ if (i != 0) {
+ ostream << ", ";
+ }
+ ostream << _conditions[i]->to_string(tagset);
+ }
+ ostream << ")";
+ return ostream.str();
+}
+
+std::ostream& MatchOperator::write_to(std::ostream &ostream) const
+{
+ ostream << name() << "(";
+ for(size_t i = 0; i < _conditions.size(); ++i) {
+ if (i != 0) {
+ ostream << ", ";
+ }
+ ostream << *_conditions[i];
+ }
+ ostream << ")";
+ return ostream;
+}
+
+} /* end ns Wccl */
diff --git a/libwccl/ops/match/matchoperator.h b/libwccl/ops/match/matchoperator.h
new file mode 100644
index 0000000..348b416
--- /dev/null
+++ b/libwccl/ops/match/matchoperator.h
@@ -0,0 +1,61 @@
+#ifndef LIBWCCL_OPS_MATCH_MATCHOPERATOR_H
+#define LIBWCCL_OPS_MATCH_MATCHOPERATOR_H
+
+#include <libwccl/ops/match/matchcondition.h>
+#include <libwccl/values/matchvector.h>
+
+namespace Wccl {
+
+/**
+ * Operator that realizes "match" functionality for match rules
+ */
+class MatchOperator : public Expression
+{
+public:
+ static const char* IterationPosVarName;
+
+ MatchOperator(const std::vector< boost::shared_ptr<const MatchCondition> >& conditions)
+ : _conditions(conditions) {
+ }
+
+ /**
+ * @returns Name of the operator.
+ */
+ std::string name() const {
+ return "match";
+ }
+
+ /**
+ * @returns String representation of the Action
+ */
+ std::string to_string(const Corpus2::Tagset& tagset) const;
+
+protected:
+ /**
+ * Writes string representation of the operator 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 operator on given context.
+ * @returns Vector of matches corresponding to match conditions,
+ * if all conditions were met. In such case position $_ is advanced past matched tokens.
+ * Empty MatchVector is returned if any of conditions was not met.
+ * In such case Position $_ is advanced by 1.
+ * @param iter_pos Pointer to the variable $_ from context's Variables
+ * @param context Execution context - current sentence and Variables to operate on
+ */
+ boost::shared_ptr<MatchVector> execute(
+ boost::shared_ptr<Position> iter_pos,
+ const ActionExecContext &context) const;
+
+private:
+ const std::vector<boost::shared_ptr<const MatchCondition> > _conditions;
+};
+
+} /* end ns Wccl */
+
+#endif // LIBWCCL_OPS_MATCH_MATCHOPERATOR_H
--
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