package innovimax.mixthem.join;

import innovimax.mixthem.exceptions.MixException;
import innovimax.mixthem.interfaces.IJoinLine;

import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;

/**
* <p>Joins two lines on a common field.</p>
* <p>This is the default implementation of IJoinLine.</p>
* @see IJoinLine
* @author Innovimax
* @version 1.0
*/
public class DefaultLineJoining implements IJoinLine {

	@Override
	public String join(String line1, String line2) throws MixException {
		if (line1 != null && line2 != null) {
			List<String> list1 = Arrays.asList(line1.split("\\s"));
			List<String> list2 = Arrays.asList(line2.split("\\s"));
			if (list1.size() > 0 && list2.contains(list1.get(0))) {
				String part1 = list1.stream().collect(Collectors.joining(" "));
				String part2 = list2.stream().filter(s -> !list1.contains(s)).collect(Collectors.joining(" "));
				return part1 + " " + part2;				
			}
		}
		return null;
	}

	@Override
	public String join(String line1, String line2, int index) throws MixException {
		if (line1 != null && line2 != null) {
			List<String> list1 = Arrays.asList(line1.split("\\s"));
			List<String> list2 = Arrays.asList(line2.split("\\s"));
			if (list1.size() <= index && list2.size() <= index) {
				if (list1.get(index).equals(list2.get(index))) {
					//merge lines
				}
			}
		}
		return null;
	}

	@Override
	public String join(String line1, String line2, int index1, int index2) throws MixException {
		System.out.println("join col1 col2 todo");
		return null;
	}

}

@@ -1325,21 +1325,290 @@
 %09%09%09%09
-//merge lines
+String part1 = list1.get(index);%09%09%09%09%09%0A%09%09%09%09%09String part2 = list1.stream().filter(s -%3E !s.equals(col).collect(Collectors.joining(%22 %22));%0A%09%09%09%09%09String part3 = list2.stream().filter(s -%3E !list1.contains(s)).collect(Collectors.joining(%22 %22));%0A%09%09%09%09%09return part1 + %22 %22 + part2 + %22 %22 + part3;%09
 %0A%09%09%09

Update DefaultLineJoining.java