codes.thischwa.c5c.util.StringUtils.java Source code

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Here is the source code for codes.thischwa.c5c.util.StringUtils.java

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/*
 * C5Connector.Java - The Java backend for the filemanager of corefive.
 * It's a bridge between the filemanager and a storage backend and 
 * works like a transparent VFS or proxy.
 * Copyright (C) Thilo Schwarz
 * 
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */
package codes.thischwa.c5c.util;

import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.net.URLEncoder;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;

import org.apache.commons.io.FilenameUtils;

import codes.thischwa.c5c.PropertiesLoader;

/**
 * Some static string helper methods.
 */
public class StringUtils {

    /** The empty string {@code ""}. */
    public static final String EMPTY_STRING = "";

    public static final boolean isNullOrEmpty(final String... strings) {
        for (String string : strings) {
            if (!_isNullOrEmpty(string))
                return false;
        }
        return true;
    }

    private static boolean _isNullOrEmpty(final String str) {
        return (str == null || str.length() == 0);
    }

    public static final boolean isNullOrEmptyOrBlank(final String str) {
        if (_isNullOrEmpty(str))
            return true;
        for (int i = 0; i < str.length(); i++) {
            if (!Character.isWhitespace(str.charAt(i)))
                return false;
        }
        return true;
    }

    public static final String encode(final String str) {
        try {
            return URLEncoder.encode(str, PropertiesLoader.getDefaultEncoding());
        } catch (UnsupportedEncodingException e) {
            throw new RuntimeException(e);
        }
    }

    public static String decode(String str) {
        try {
            return URLDecoder.decode(str, PropertiesLoader.getDefaultEncoding());
        } catch (UnsupportedEncodingException e) {
            throw new RuntimeException(e);
        }
    }

    public static Map<String, String> divideAndDecodeQueryString(String query) {
        Map<String, String> params = new HashMap<>();
        if (isNullOrEmptyOrBlank(query))
            return params;
        String[] keyValues = query.split("&");
        for (String keyValue : keyValues) {
            String[] kv = keyValue.split("=");
            String key = kv[0];
            String val = (kv.length == 2) ? decode(kv[1]) : "";
            params.put(key, val);
        }
        return params;
    }

    public static String getUniqueName(Set<String> existingNames, String name) {
        if (!existingNames.contains(name))
            return name;

        int count = 1;
        String ext = FilenameUtils.getExtension(name);
        String baseName = FilenameUtils.getBaseName(name);
        String tmpName;
        do {
            tmpName = String.format("%s_%d", baseName, count);
            if (!_isNullOrEmpty(ext))
                tmpName = String.format("%s.%s", tmpName, ext);
            count++;
        } while (existingNames.contains(tmpName));
        return tmpName;
    }
}