Move search::attribute::ISearchContext to searchcommon in preparation of extending IAttributeVector API.

2 files changed, 98 insertions, 0 deletions

diff --git a/searchcommon/src/vespa/searchcommon/attribute/i_search_context.h b/searchcommon/src/vespa/searchcommon/attribute/i_search_context.h
new file mode 100644
index 00000000000..bb6dfe0daf6
--- /dev/null
+++ b/searchcommon/src/vespa/searchcommon/attribute/i_search_context.h
@@ -0,0 +1,68 @@
+// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+
+#pragma once
+
+#include <vespa/searchcommon/common/range.h>
+
+namespace search {
+
+namespace fef {
+    class TermFieldMatchData;
+}
+namespace queryeval {
+    class SearchIterator;
+}
+
+class QueryTermBase;
+
+namespace attribute {
+
+
+    class ISearchContext {
+    public:
+        virtual ~ISearchContext() {}
+
+        virtual unsigned int approximateHits() const = 0;
+
+        /**
+         * Creates an attribute search iterator associated with this
+         * search context.
+         *
+         * @return attribute search iterator
+         *
+         * @param matchData the attribute match data used when
+         * unpacking data for a hit
+         *
+         * @param strict whether the iterator should be strict or not
+         **/
+        virtual std::unique_ptr<queryeval::SearchIterator>
+        createIterator(fef::TermFieldMatchData *matchData, bool strict) = 0;
+
+        /**
+         * Creates an attribute search iterator associated with this
+         * search context.  Postings lists are not used.
+         *
+         * @return attribute search iterator
+         *
+         * @param matchData the attribute match data used when
+         * unpacking data for a hit
+         *
+         * @param strict whether the iterator should be strict or not
+         **/
+        virtual std::unique_ptr<queryeval::SearchIterator>
+        createFilterIterator(fef::TermFieldMatchData *matchData, bool strict) = 0;
+
+        /*
+         * Create temporary posting lists.  Should be called before
+         * createIterator is called.
+         */
+        virtual void fetchPostings(bool strict) = 0;
+        virtual bool valid() const = 0;
+        virtual Int64Range getAsIntegerTerm() const = 0;
+
+        virtual const QueryTermBase & queryTerm() const = 0;
+
+    };
+
+}
+}
diff --git a/searchcommon/src/vespa/searchcommon/common/range.h b/searchcommon/src/vespa/searchcommon/common/range.h
new file mode 100644
index 00000000000..f33630daaf4
--- /dev/null
+++ b/searchcommon/src/vespa/searchcommon/common/range.h
@@ -0,0 +1,30 @@
+// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+// Copyright (C) 1998-2003 Fast Search & Transfer ASA
+// Copyright (C) 2003 Overture Services Norway AS
+
+#pragma once
+
+namespace search
+{
+
+template <typename T>
+class Range {
+public:
+    Range() :
+        _lower(std::numeric_limits<T>::max()),
+        _upper(std::numeric_limits<T>::min()) { }
+    Range(T v) : _lower(v), _upper(v) { }
+    Range(T low, T high) : _lower(low), _upper(high) { }
+    T lower() const { return _lower; }
+    T upper() const { return _upper; }
+    bool valid() const { return _lower <= _upper; }
+    bool isPoint() const { return _lower == _upper; }
+private:
+    T _lower;
+    T _upper;
+};
+
+using Int64Range = Range<int64_t>;
+
+} // namespace search
+