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authorHieu Hoang <hieuhoang@gmail.com>2012-11-12 23:56:18 +0400
committerHieu Hoang <hieuhoang@gmail.com>2012-11-12 23:56:18 +0400
commit5e3ef23cef6101d2c098eb3445f562e8f595655b (patch)
treeb8c332b6fa82bae84ea4910967a10ba1b08a7107 /moses/PartialTranslOptColl.h
parent8c785cff2b1be3cccd76ea9026f71b649762dfc3 (diff)
move moses/src/* to moses/
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diff --git a/moses/PartialTranslOptColl.h b/moses/PartialTranslOptColl.h
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+// $Id$
+
+/***********************************************************************
+Moses - factored phrase-based language decoder
+Copyright (C) 2006 University of Edinburgh
+
+This library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with this library; if not, write to the Free Software
+Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+***********************************************************************/
+
+#ifndef moses_PartialTranslOptColl_h
+#define moses_PartialTranslOptColl_h
+
+#include <list>
+#include <iostream>
+#include "TranslationOption.h"
+#include "Util.h"
+#include "StaticData.h"
+#include "FactorTypeSet.h"
+
+namespace Moses
+{
+
+/** Contains partial translation options, while these are constructed in the class TranslationOption.
+ * The factored translation model allows for multiple translation and
+ * generation steps during a single Hypothesis expansion. For efficiency,
+ * all these expansions are precomputed and stored as TranslationOption.
+ * The expansion process itself may be still explode, so efficient handling
+ * of partial translation options during expansion is required.
+ * This class assists in this tasks by implementing pruning.
+ * This implementation is similar to the one in HypothesisStack.
+ */
+class PartialTranslOptColl
+{
+protected:
+ std::vector<TranslationOption*> m_list;
+ float m_bestScore; /**< score of the best translation option */
+ float m_worstScore; /**< score of the worse translation option */
+ size_t m_maxSize; /**< maximum number of translation options allowed */
+ size_t m_totalPruned; /**< number of options pruned */
+
+public:
+ PartialTranslOptColl();
+
+ /** destructor, cleans out list */
+ ~PartialTranslOptColl() {
+ RemoveAllInColl( m_list );
+ }
+
+ void AddNoPrune(const TranslationSystem* system, TranslationOption *partialTranslOpt);
+ void Add(const TranslationSystem* system, TranslationOption *partialTranslOpt);
+ void Prune();
+
+ /** returns list of translation options */
+ const std::vector<TranslationOption*>& GetList() const {
+ return m_list;
+ }
+
+ /** clear out the list */
+ void DetachAll() {
+ m_list.clear();
+ }
+
+ /** return number of pruned partial hypotheses */
+ size_t GetPrunedCount() {
+ return m_totalPruned;
+ }
+
+};
+
+}
+#endif