Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Open Source License 

import android.support.annotation.NonNull;

import java.util.ArrayList;
import java.util.List;

public class Main {
    @NonNull
    public static String cleanupTagList(@NonNull final Object value, final char firstCharacter) {
        String tags = (String) value;

        String[] lines = ((String) value).split("[\\p{Space}\\p{Punct}\\r?\\n]");
        List<String> nonTrivialLines = new ArrayList<>();
        for (String line : lines) {
            String s = cleanupTag(line, firstCharacter);
            if (s.length() > 1) {
                nonTrivialLines.add(s);
            }
        }
        StringBuffer sb = new StringBuffer(tags.length());
        for (String line : nonTrivialLines) {
            sb.append(line);
            sb.append("\n");
        }
        String cleanedUpTagList = sb.toString().trim();
        if (!tags.equals(cleanedUpTagList)) {
            return cleanedUpTagList;
        }

        return tags;
    }

    /**
     * Return the original object if no cleanup is done, or for example "" if there are zero characters worth
     * keeping after cleanup
     * <p>
     * Cleanup means conformance to "#tagnumberlowercasedigitsnotinfirstposition"
     *
     * @param value
     * @return
     */
    @NonNull
    public static String cleanupTag(@NonNull final Object value, final char firstCharacter) {
        final String tag = ((String) value);
        String cleanedTag = tag.trim().toLowerCase();

        while (cleanedTag.startsWith("##") || cleanedTag.startsWith("@@")) {
            cleanedTag = cleanedTag.substring(1);
        }
        final StringBuffer sb = new StringBuffer(cleanedTag.length());
        boolean first = true;
        for (char c : cleanedTag.toCharArray()) {
            if (!Character.isLetter(c)) {
                // Is not a letter
                if (!first && Character.isDigit(c)) {
                    sb.append(c);
                }
                continue;
            }
            sb.append(c);
            first = false;
        }
        String s = sb.toString();
        if (!s.startsWith("" + firstCharacter)) {
            s = firstCharacter + s;
        }
        if (!s.equals(tag)) {
            return s;
        }

        return tag;
    }
}