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An open library used to connect to the ecFeed service. It can be also used as a standalone testing tool. It is integrated with Junit5 and generates a stream of test cases using a selected algorithm (e.g. Cartesian, N-Wise). There are no limitations associated with the off-line version but the user cannot access the on-line computation servers and the model database.

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/*******************************************************************************
 *
 * Copyright (c) 2016 ecFeed AS.                                                
 * All rights reserved. This program and the accompanying materials              
 * are made available under the terms of the Eclipse Public License v1.0         
 * which accompanies this distribution, and is available at                      
 * http://www.eclipse.org/legal/epl-v10.html 
 *  
 *******************************************************************************/

package com.ecfeed.core.utils;

import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;


public class RegexHelper {
	
	public static final String REGEX_SPECIAL_CHARACTER = "\u039B";
	
	public static final String REGEX_JAVA_IDENTIFIER = "[" + REGEX_SPECIAL_CHARACTER + "A-Za-z_$][" + REGEX_SPECIAL_CHARACTER + "A-Za-z0-9_$]*";
	public static final String REGEX_ALPHANUMERIC_WITH_SPACES_64 = "[" + REGEX_SPECIAL_CHARACTER + "A-Za-z0-9_\\-][" + REGEX_SPECIAL_CHARACTER + "A-Za-z0-9_\\- ]{0,63}";	
	public static final String REGEX_ROOT_NODE_NAME = REGEX_ALPHANUMERIC_WITH_SPACES_64;
	public static final String REGEX_PACKAGE_NAME = "(\\.|((" + REGEX_JAVA_IDENTIFIER + ")\\.)*)";
	public static final String REGEX_CLASS_NODE_NAME = REGEX_PACKAGE_NAME + "*"+ REGEX_JAVA_IDENTIFIER;
	public static final String REGEX_METHOD_NODE_NAME = REGEX_JAVA_IDENTIFIER;
	public static final String REGEX_CATEGORY_NODE_NAME = REGEX_JAVA_IDENTIFIER;
	public static final String REGEX_CATEGORY_TYPE_NAME = REGEX_CLASS_NODE_NAME;
	public static final String REGEX_CONSTRAINT_NODE_NAME = REGEX_ALPHANUMERIC_WITH_SPACES_64;
	public static final String REGEX_TEST_CASE_NODE_NAME = REGEX_ALPHANUMERIC_WITH_SPACES_64;
	public static final String REGEX_PARTITION_NODE_NAME = REGEX_ALPHANUMERIC_WITH_SPACES_64;
	public static final String REGEX_PARTITION_LABEL = REGEX_ALPHANUMERIC_WITH_SPACES_64;

	public static final String REGEX_USER_TYPE_VALUE = REGEX_JAVA_IDENTIFIER;
	public static final String REGEX_STRING_TYPE_VALUE = "[" + REGEX_SPECIAL_CHARACTER + "A-Za-z1-9 !@#$%^&*()_+=;':,.<>/?]{0,1024}";
	public static final String REGEX_CHAR_TYPE_VALUE = "[" + REGEX_SPECIAL_CHARACTER + "A-Za-z1-9 !@#$%^&*()_+=;':,.<>/?]";
	
	public static final String PARTITION_NAME_REGEX_PROBLEM = "Choice name must be 1 to 64 characters long.\nIt should contain alphanumeric characters, spaces, or -_ .\nIt must not start with space.";
	public static final String MODEL_NAME_REGEX_PROBLEM = "Model name must contain between 1 and 64 alphanumeric characters or spaces.\n The model name must not start with space.";
	public static final String CLASS_NAME_REGEX_PROBLEM = "The provided name must fulfill all rules for a qualified name of a class in Java";	

	public static List getMatchingSubstrings(String sourceString, String regexPattern) {

		List substrings = new ArrayList();

		Pattern pattern = Pattern.compile(regexPattern);
		Matcher matcher = pattern.matcher(sourceString);

		while(matcher.find()) {
			substrings.add(matcher.group());
		}

		return substrings;
	}


	public static String getOneMatchingSubstring(String sourceString, String regexPattern) {

		List substrings = getMatchingSubstrings(sourceString, regexPattern);

		if (substrings.size() == 1) {
			return substrings.get(0);
		}

		return null;
	}

}