add various utility methods to SQLParserResult like releaseStatements

src/SQLParser.cpp

@@ -27,7 +27,9 @@ namespace hsql {
 
     // Parse the tokens.
     // If parsing fails, the result will contain an error object.
-    hsql_parse(result, scanner);
+    int ret = hsql_parse(result, scanner);
+    bool success = (ret == 0);
+    result->setIsValid(success);
 
     hsql__delete_buffer(state, scanner);
     hsql_lex_destroy(scanner);

src/SQLParser.h

@@ -10,16 +10,21 @@ namespace hsql {
   class SQLParser {
    public:
     // Parses a given constant character SQL string into the result object.
+    // Returns true if the lexer and parser could run without internal errors.
+    // This does NOT mean that the SQL string was valid SQL. To check that
+    // you need to check result->isValid();
     static bool parseSQLString(const char* sql, SQLParserResult* result);
 
     // Parses a given SQL string into the result object.
     static bool parseSQLString(const std::string& sql, SQLParserResult* result);
 
+    // Deprecated:
     // Parses a given constant character SQL string.
     // Note: This is kept for legacy reasons. It is recommended to use
     //       the (const char*, SQLParserResult*) implementation.
     static SQLParserResult* parseSQLString(const char* sql);
 
+    // Deprecated:
     // Parses an SQL std::string.
     // Note: This is kept for legacy reasons. It is recommended to use
     //       the (const std::string&, SQLParserResult*) implementation.

src/SQLParserResult.cpp

@@ -4,21 +4,17 @@
 namespace hsql {
 
   SQLParserResult::SQLParserResult() :
-    isValid_(true),
+    isValid_(false),
     errorMsg_(NULL) {};
 
   SQLParserResult::SQLParserResult(SQLStatement* stmt) :
-    isValid_(true),
+    isValid_(false),
     errorMsg_(NULL) {
     addStatement(stmt);
   };
 
   SQLParserResult::~SQLParserResult() {
-    for (SQLStatement* statement : statements_) {
-      delete statement;
-    }
-
-    free(errorMsg_);
+    reset();
   }
 
   void SQLParserResult::addStatement(SQLStatement* stmt) {
@@ -63,4 +59,30 @@ namespace hsql {
     errorColumn_ = errorColumn;
   }
 
+  const std::vector<SQLStatement*>& SQLParserResult::getStatements() const {
+    return statements_;
+  }
+
+  std::vector<SQLStatement*> SQLParserResult::releaseStatements() {
+    std::vector<SQLStatement*> copy = statements_;
+
+    statements_.clear();
+
+    return copy;
+  }
+
+  void SQLParserResult::reset() {
+    for (SQLStatement* statement : statements_) {
+      delete statement;
+    }
+    statements_.clear();
+
+    isValid_ = false;
+
+    free(errorMsg_);
+    errorMsg_ = NULL;
+    errorLine_ = -1;
+    errorColumn_ = -1;
+  }
+
 } // namespace hsql

src/SQLParserResult.h

@@ -18,12 +18,19 @@ namespace hsql {
     // Deletes all statements in the result.
     virtual ~SQLParserResult();
 
+    // Set whether parsing was successful.
+    void setIsValid(bool isValid);
+
     // Returns true if parsing was successful.
     bool isValid() const;
 
     // Returns the number of statements in the result.
     size_t size() const;
 
+    // Set the details of the error, if available.
+    // Takes ownership of errorMsg.
+    void setErrorDetails(char* errorMsg, int errorLine, int errorColumn);
+
     // Returns the error message, if an error occurred.
     const char* errorMsg() const;
 
@@ -33,23 +40,25 @@ namespace hsql {
     // Returns the column number of the occurrance of the error in the query.
     int errorColumn() const;
 
+    // Adds a statement to the result list of statements.
+    // SQLParserResult takes ownership of the statement.
+    void addStatement(SQLStatement* stmt);
+
     // Gets the SQL statement with the given index.
     const SQLStatement* getStatement(int index) const;
 
     // Gets the non const SQL statement with the given index.
     SQLStatement* getMutableStatement(int index);
 
-    // Adds a statement to the result list of statements.
-    // SQLParserResult takes ownership of the statement.
-    void addStatement(SQLStatement* stmt);
+    // Get the list of all statements.
+    const std::vector<SQLStatement*>& getStatements() const;
 
-    // Set whether parsing was successful.
-    void setIsValid(bool isValid);
-
-    // Set the details of the error, if available.
-    // Takes ownership of errorMsg.
-    void setErrorDetails(char* errorMsg, int errorLine, int errorColumn);
+    // Returns a copy of the list of all statements in this result.
+    // Removes them from this result.
+    std::vector<SQLStatement*> releaseStatements();
 
+    // Deletes all statements and other data within the result.
+    void reset();
 
    private:
     // List of statements within the result.

test/sql_tests.cpp

@@ -161,4 +161,24 @@ TEST(ExecuteStatementTest) {
   ASSERT_EQ(stmt->parameters->size(), 2);
 }
 
+TEST(ReleaseStatementTest) {
+  TEST_PARSE_SINGLE_SQL(
+    "SELECT * FROM students;",
+    kStmtSelect,
+    SelectStatement,
+    result,
+    stmt);
+
+  ASSERT_EQ(1, result.size());
+  ASSERT_NULL(stmt->whereClause);
+
+  std::vector<SQLStatement*> statements = result.releaseStatements();
+
+  ASSERT_EQ(0, result.size());
+
+  for (SQLStatement* stmt : statements) {
+    delete stmt;
+  }
+}
+
 TEST_MAIN();