com.sap.prd.mobile.ios.ota.lib.LibUtils.java Source code

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Here is the source code for com.sap.prd.mobile.ios.ota.lib.LibUtils.java

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/*
 * #%L
 * Over-the-air deployment library
 * %%
 * Copyright (C) 2012 SAP AG
 * %%
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * #L%
 */
package com.sap.prd.mobile.ios.ota.lib;

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

import org.apache.commons.lang.StringUtils;
import org.sonatype.plexus.components.cipher.Base64;

public class LibUtils {

    public static URL buildUrl(String urlPrefix, String urlSuffix) throws MalformedURLException {
        String urlPrefixFixed = urlPrefix.trim();
        while (urlPrefixFixed.endsWith("/")) { //Remove trailing '/'
            urlPrefixFixed = urlPrefixFixed.substring(0, urlPrefixFixed.length() - 1);
        }
        URL url = new URL(urlPrefixFixed + "/" + urlSuffix);
        return url;
    }

    /**
     * Generates the link to the IPA file based on the referer to the HTML file, the used
     * ipaClassifier and otaClassifier. If no classifiers are specified the IPA URL will have the same
     * value as the referer, except of the file extension.
     * 
     * @param referer
     *          Referer to the HTML file located next to the IPA file
     * @param ipaClassifier
     *          classifier used in the IPA file. Can be null.
     * @param otaClassifier
     *          classifier used in the OTA HTML file. Can be null.
     * @return
     * @throws MalformedURLException
     */
    public static URL generateDirectIpaUrl(String referer, String ipaClassifier, String otaClassifier)
            throws MalformedURLException {
        int idx = referer.lastIndexOf(".");
        if (idx > 0 && idx > referer.length() - 6) {
            String ipaUrl = referer.substring(0, idx) + ".ipa";
            if (!StringUtils.isEmpty(otaClassifier)) {
                if (!StringUtils.isEmpty(ipaClassifier)) {
                    ipaUrl = replaceLast(ipaUrl, "-" + otaClassifier, "-" + ipaClassifier);
                } else {
                    ipaUrl = replaceLast(ipaUrl, "-" + otaClassifier, "");
                }
            } else {
                if (!StringUtils.isEmpty(ipaClassifier)) {
                    ipaUrl = ipaUrl.substring(0, idx) + "-" + ipaClassifier + ".ipa";
                }
            }
            return new URL(ipaUrl);
        } else {
            throw new MalformedURLException("Referer does not end with a file (e.g. .htm): " + referer);
        }
    }

    public static String replaceLast(String string, String searchString, String replaceString) {
        if (string == null || searchString == null || replaceString == null) {
            throw new NullPointerException();
        }
        if (StringUtils.isEmpty(searchString)) {
            return string;
        }
        if (StringUtils.countMatches(string, searchString) <= 1) {
            return string.replace(searchString, replaceString);
        } else {
            int idx = string.lastIndexOf(searchString);
            return string.substring(0, idx) + string.substring(idx).replace(searchString, replaceString);
        }
    }

    public static String urlEncode(String string) {
        if (string == null) {
            return null;
        }
        try {
            return URLEncoder.encode(string, "UTF-8");
        } catch (UnsupportedEncodingException e) {
            throw new RuntimeException(e); //should never happen
        }
    }

    public static String urlDecode(String string) {
        if (string == null) {
            return null;
        }
        try {
            return URLDecoder.decode(string, "UTF-8");
        } catch (UnsupportedEncodingException e) {
            throw new RuntimeException(e); //should never happen
        }
    }

    public static String encode(String string) {
        if (string == null) {
            return null;
        }
        try {
            byte[] bytes = string.getBytes("UTF-8");
            byte[] base64Bytes = Base64.encodeBase64(bytes);
            String base64String = new String(base64Bytes, "US-ASCII");
            return URLEncoder.encode(base64String, "UTF-8");
        } catch (UnsupportedEncodingException e) {
            throw new RuntimeException(e); //should never happen
        }
    }

    public static String decode(String string) {
        if (string == null) {
            return null;
        }
        try {
            String urlDecodedString = URLDecoder.decode(string, "UTF-8");
            byte[] urlDecodedBytes = urlDecodedString.getBytes("US-ASCII");
            byte[] decodedBase64Bytes = Base64.decodeBase64(urlDecodedBytes);
            return new String(decodedBase64Bytes, "UTF-8");
        } catch (UnsupportedEncodingException e) {
            throw new RuntimeException(e); //should never happen
        }
    }

    /**
     * Builds a map of key/value pairs.
     * @param keyValuePairs array containing the key value pairs in the way {key, value, key, value, ...}
     * @return
     */
    public static Map<String, String> buildMap(String... keyValuePairs) {
        if (keyValuePairs.length % 2 != 0)
            throw new IllegalArgumentException("keyValuePairs array not dividable by 2 (key + value)");
        Map<String, String> map = new HashMap<String, String>();
        for (int i = 0; i < keyValuePairs.length; i += 2) {
            map.put(keyValuePairs[i], keyValuePairs[i + 1]);
        }
        return map;
    }

}