Java tutorial
/**************************************************************** * Licensed to the Apache Software Foundation (ASF) under one * * or more contributor license agreements. See the NOTICE file * * distributed with this work for additional information * * regarding copyright ownership. The ASF licenses this file * * to you 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 org.apache.james.blob.objectstorage.crypto; import com.amazonaws.util.StringUtils; import com.google.common.base.Preconditions; import com.google.crypto.tink.subtle.Hex; public class CryptoConfigBuilder { private String salt; private char[] password; CryptoConfigBuilder() { } public CryptoConfigBuilder salt(String salt) { this.salt = salt; return this; } public CryptoConfigBuilder password(char[] password) { this.password = password; return this; } public CryptoConfig build() { Preconditions.checkState(!StringUtils.isNullOrEmpty(salt)); Preconditions.checkState(password != null && password.length > 0); return new CryptoConfig(Hex.encode(Hex.decode(salt)), password); } }