Main.java Source code

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Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Apache License 

import java.util.LinkedHashMap;

public class Main {
    public static final String DEFAULT_CATEGORIES = "no category";

    /**
     * We are parsing a string like animal,-dog,--chihuahua*,-cat,--siamese
     * into a list of strings to put into ListBox and values. The strings
     * are used as keys and use tabs/whatever system to show hierarchy.
     * The values are the values themselves, with no dashes at the beginning.
     * A trailing asterisk denotes a default value and is parsed by a different function.
     *
     * @param categoryString Category string to parse.
     * @return Map with the parsed categories.
     */
    public static LinkedHashMap<String, String> parseCategories(final String categoryString) {
        final LinkedHashMap<String, String> result = new LinkedHashMap<String, String>();
        final String[] categories = splitCategoryString(categoryString);
        for (final String cat : categories) {
            final String category = cat.trim();
            final int i = getNumDashes(category);
            final int isDefault = isDefault(category) ? 1 : 0;
            final String value = category.substring(i, category.length() - isDefault);
            final String key = repeat(i, " - ") + value;
            result.put(key, value);
        }

        return result;
    }

    private static String[] splitCategoryString(final String categoryString) {
        final String catStr = (categoryString == null ? DEFAULT_CATEGORIES : categoryString);
        return catStr.split(",");
    }

    static int getNumDashes(final String category) {
        int i = 0;
        while (i < category.length() && (int) category.charAt(i) == (int) '-') {
            i++;
        }
        return i;
    }

    static boolean isDefault(final String category) {
        return category.endsWith("*");
    }

    private static String repeat(final int i, final CharSequence text) {
        return new String(new char[i]).replace("\0", text);
    }
}