From 03883ac585b8ca2f3d295790cd54b5fde209a55d Mon Sep 17 00:00:00 2001
From: Andrew Stitcher <astitcher@apache.org>
Date: Mon, 18 Mar 2013 21:08:34 +0000
Subject: QPID-4624: Implement IN operator for C++ broker selectors -
 Implemented parser for IN operator - Implement In operator evaluator and unit
 tests - Syntax is a bit wider than the spec allowing full expressions   in
 the contents of the IN expression not just strings.

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1457998 13f79535-47bb-0310-9956-ffa450edef68
---
 qpid/cpp/src/qpid/broker/SelectorExpression.cpp | 52 ++++++++++++++++++++++++-
 qpid/cpp/src/tests/Selector.cpp                 |  7 ++++
 2 files changed, 57 insertions(+), 2 deletions(-)

diff --git a/qpid/cpp/src/qpid/broker/SelectorExpression.cpp b/qpid/cpp/src/qpid/broker/SelectorExpression.cpp
index 58ab756a12..2eaffd7ccb 100644
--- a/qpid/cpp/src/qpid/broker/SelectorExpression.cpp
+++ b/qpid/cpp/src/qpid/broker/SelectorExpression.cpp
@@ -31,8 +31,9 @@
 #include <memory>
 #include <ostream>
 
-#include <boost/scoped_ptr.hpp>
 #include <boost/lexical_cast.hpp>
+#include <boost/scoped_ptr.hpp>
+#include <boost/ptr_container/ptr_vector.hpp>
 
 /*
  * Syntax for JMS style selector expressions (informal):
@@ -379,6 +380,40 @@ public:
     }
 };
 
+class InExpression : public BoolExpression {
+    boost::scoped_ptr<Expression> e;
+    boost::ptr_vector<Expression> l;
+
+public:
+    InExpression(Expression* e_, boost::ptr_vector<Expression>& l_) :
+        e(e_)
+    {
+        l.swap(l_);
+    }
+
+    void repr(ostream& os) const {
+        os << *e << " IN (";
+        for (std::size_t i = 0; i<l.size(); ++i){
+            os << l[i] << (i<l.size()-1 ? ", " : ")");
+        }
+    }
+
+    BoolOrNone eval_bool(const SelectorEnv& env) const {
+        Value ve(e->eval(env));
+        if (unknown(ve)) return BN_UNKNOWN;
+        BoolOrNone r = BN_FALSE;
+        for (std::size_t i = 0; i<l.size(); ++i){
+            Value li(l[i].eval(env));
+            if (unknown(li)) {
+                r = BN_UNKNOWN;
+                continue;
+            }
+            if (ve==li) return BN_TRUE;
+        }
+        return r;
+    }
+};
+
 // Arithmetic Expression types
 
 class ArithmeticExpression : public Expression {
@@ -751,6 +786,18 @@ BoolExpression* parseSpecialComparisons(Tokeniser& tokeniser, std::auto_ptr<Expr
         if ( !upper.get() ) return 0;
         return new BetweenExpression(e1.release(), lower.release(), upper.release());
     }
+    case T_IN: {
+        if ( tokeniser.nextToken().type!=T_LPAREN ) return 0;
+        boost::ptr_vector<Expression> list;
+        do {
+            std::auto_ptr<Expression> e(parseAddExpression(tokeniser));
+            if (!e.get()) return 0;
+            list.push_back(e.release());
+        } while (tokeniser.nextToken().type==T_COMMA);
+        tokeniser.returnTokens();
+        if ( tokeniser.nextToken().type!=T_RPAREN ) return 0;
+        return new InExpression(e1.release(), list);
+    }
     default:
         return 0;
     }
@@ -788,7 +835,8 @@ Expression* parseComparisonExpression(Tokeniser& tokeniser)
         return new UnaryBooleanExpression<Expression>(&notOp, e.release());
     }
     case T_BETWEEN:
-    case T_LIKE: {
+    case T_LIKE:
+    case T_IN: {
         tokeniser.returnTokens();
         return parseSpecialComparisons(tokeniser, e1);
     }
diff --git a/qpid/cpp/src/tests/Selector.cpp b/qpid/cpp/src/tests/Selector.cpp
index 7758e3e5b0..1fc9a9b7bb 100644
--- a/qpid/cpp/src/tests/Selector.cpp
+++ b/qpid/cpp/src/tests/Selector.cpp
@@ -297,6 +297,7 @@ QPID_AUTO_TEST_CASE(parseString)
     BOOST_CHECK_NO_THROW(qb::Selector e("(354.6)"));
     BOOST_CHECK_NO_THROW(qb::Selector e("A is null and 'hello out there'"));
     BOOST_CHECK_NO_THROW(qb::Selector e("17/4>4"));
+    BOOST_CHECK_NO_THROW(qb::Selector e("A IN ('hello', 'there', 1 , true, (1-17))"));
 }
 
 class TestSelectorEnv : public qpid::broker::SelectorEnv {
@@ -401,6 +402,12 @@ QPID_AUTO_TEST_CASE(comparisonEval)
     BOOST_CHECK(!qb::Selector("'hello'>42 and 'hello'<42 and 'hello'=42 and 'hello'<>42").eval(env));
     BOOST_CHECK(qb::Selector("20 >= 19.0 and 20 > 19").eval(env));
     BOOST_CHECK(qb::Selector("42 <= 42.0 and 37.0 >= 37").eval(env));
+    BOOST_CHECK(qb::Selector("(A IN ('hello', 'there', 1 , true, (1-17))) IS NULL").eval(env));
+    BOOST_CHECK(qb::Selector("'hello' IN ('hello', 'there', 1 , true, (1-17))").eval(env));
+    BOOST_CHECK(qb::Selector("TRUE IN ('hello', 'there', 1 , true, (1-17))").eval(env));
+    BOOST_CHECK(qb::Selector("-16 IN ('hello', 'there', 1 , true, (1-17))").eval(env));
+    BOOST_CHECK(!qb::Selector("'hell' IN ('hello', 'there', 1 , true, (1-17))").eval(env));
+    BOOST_CHECK(qb::Selector("('hell' IN ('hello', 'there', 1 , true, (1-17), A)) IS NULL").eval(env));
 }
 
 QPID_AUTO_TEST_CASE(NullEval)
-- 
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