/*
* Copyright 2014 Google Inc. All rights reserved.
*
* 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.
*/
package com.google.samples.apps.iosched.server.schedule.model.validator;
import com.google.gson.JsonPrimitive;
import java.util.Random;
public class StringObfuscateConverter extends Converter {
static Random r = new Random();
public static String obfuscate(String src) {
r.setSeed(src.hashCode()); // static seed to keep output stable
char[] str = src.toCharArray();
for (int i=0; i<str.length; i++) {
char ch = str[i];
if (Character.isLowerCase(ch)) {
str[i] = (char) ('a' + r.nextInt(25));
} else if (Character.isUpperCase(ch)) {
str[i] = (char) ('A' + r.nextInt(25));
} else if (Character.isDigit(ch)) {
str[i] = (char) ('0' + r.nextInt(10));
}
}
return new String(str);
}
@Override
public JsonPrimitive convert(JsonPrimitive value) {
if (value == null) {
return null;
}
return new JsonPrimitive(obfuscate(value.getAsString()));
}
}