Accumulating filtered values

[mohan.radhakrishnan at polarisFT.com]

Hi,
            I have two streams. One is the log line and another stream is 
the pattern list. I was trying to accumulate the result of 'm.find()' in a 
List because this function returns multiple values in a while loop. I 
think here instead of a Predicate I need some type of accumulator ? I 
searched but didn't find an example.

This code compiles and runs but I couldn't access the list of accumulated 
matches.

The result now is a set of Matchers.But not the matches. Each Matcher is 
printed two times.

[java.util.regex.Matcher[pattern=Current.*?[/|] region=0,447 lastmatch=]]
java.util.regex.Matcher[pattern=Current.*?[/|] region=0,447 lastmatch=]
[java.util.regex.Matcher[pattern=Current.*?[/|] region=0,447 lastmatch=]]
java.util.regex.Matcher[pattern=Current.*?[/|] region=0,447 lastmatch=]
[java.util.regex.Matcher[pattern=[0-9]+(/,|/|) region=0,447 lastmatch=]]
java.util.regex.Matcher[pattern=[0-9]+(/,|/|) region=0,447 lastmatch=]
[java.util.regex.Matcher[pattern=[0-9]+(/,|/|) region=0,447 lastmatch=]]
java.util.regex.Matcher[pattern=[0-9]+(/,|/|) region=0,447 lastmatch=]

Thanks.

        Predicate<Matcher> matches = m -> {
            List<String> list = new ArrayList();
            while(m.find()){
                String match = m.group();
                list.add(match);
            }
            return true;
        };

        //Style 1
        patterns.stream()
                .flatMap(new Function<Pattern, Stream<Matcher>>() {
                    @Override
                    public Stream<Matcher> apply(Pattern p) {
                        return source.stream()
                                .map(p::matcher)
                                .filter(matches).map(l -> {
                                    System.out.println( "[" + l + "]" );
                                    return l;
                                });
                    }
                })
                .forEach(System.out::println);


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