implement substring generation

alib2algo/src/string/generate/RandomStringFactory.cpp

@@ -9,6 +9,9 @@
 #include <algorithm>
 #include <random>
+#include <vector>
+
+#include <exception/AlibException.h>
 namespace string {

alib2algo/src/string/generate/RandomStringFactory.h

 /*
- * RandomAutomatonFactory.h
+ * RandomStringFactory.h
  *
  *  Created on: 27. 3. 2014
  *      Author: Jan Travnicek
@@ -9,9 +9,6 @@
 #define RANDOM_STRING_FACTORY_H_
 #include <set>
-#include <vector>
-
-#include <exception/AlibException.h>
 #include <string/LinearString.h>
 namespace string {

alib2algo/src/string/generate/RandomSubstringFactory.cpp

+/*
+ * RandomSubstringFactory.cpp
+ *
+ *  Created on: 27. 3. 2014
+ *	  Author: Jan Travnicek
+ */
+
+#include "RandomSubstringFactory.h"
+
+#include <algorithm>
+#include <random>
+#include <exception/AlibException.h>
+
+#include <string/LinearString.h>
+
+namespace string {
+
+namespace generate {
+
+string::LinearString RandomSubstringFactory::generateSubstring( size_t size, const string::LinearString & string) {
+	if(size > string.getContent().size())
+		throw exception::AlibException("String not long enough");
+
+	srand( time( NULL ) );
+
+	size_t begin = std::random_devices::semirandom() % (string.getContent().size() - size + 1);
+
+	std::vector<alphabet::Symbol> data(string.getContent().begin() + begin, string.getContent().begin() + begin + size);
+
+	return LinearString {string.getAlphabet(), data};
+}
+
+auto RandomSubstringFactoryLinearString = RandomSubstringFactory::RegistratorWrapper < string::LinearString, string::LinearString > ( RandomSubstringFactory::getInstance ( ), RandomSubstringFactory::generateSubstring );
+
+} /* namespace generate */
+
+} /* namespace string */

alib2algo/src/string/generate/RandomSubstringFactory.h

+/*
+ * RandomSubstringFactory.h
+ *
+ *  Created on: 27. 3. 2014
+ *      Author: Jan Travnicek
+ */
+
+#ifndef RANDOM_SUBSTRING_FACTORY_H_
+#define RANDOM_SUBSTRING_FACTORY_H_
+
+#include <core/multipleDispatch.hpp>
+#include <string/String.h>
+#include <string/StringFeatures.h>
+
+namespace string {
+
+namespace generate {
+
+class RandomSubstringFactory : public std::SingleDispatchFirstStaticParam < string::LinearString, size_t, string::StringBase > {
+public:
+	static string::LinearString generateSubstring( size_t size, const string::LinearString & );
+
+	static RandomSubstringFactory& getInstance() {
+		static RandomSubstringFactory res;
+		return res;
+	}
+};
+
+} /* namespace generate */
+
+} /* namespace string */
+
+#endif /* RANDOM_SUBSTRING_FACTORY_H_ */