com.google.iosched.model.validator.StringObfuscateConverter.java Source code

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Here is the source code for com.google.iosched.model.validator.StringObfuscateConverter.java

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/*
 * 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.iosched.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()));
    }
}