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.jclouds.compute.util; import com.google.common.base.Optional; import com.google.common.base.Splitter; import java.util.Map; public class AutomaticHardwareIdSpec { private double cores; private int ram; private Optional<Float> disk = Optional.absent(); public static boolean isAutomaticId(String id) { return id.startsWith("automatic:"); } public static AutomaticHardwareIdSpec parseId(String hardwareId) { AutomaticHardwareIdSpec spec = new AutomaticHardwareIdSpec(); String hardwareSpec = hardwareId.substring(10); Map<String, String> specValues = Splitter.on(';').trimResults().omitEmptyStrings() .withKeyValueSeparator('=').split(hardwareSpec); if (!specValues.containsKey("ram") || !specValues.containsKey("cores")) { throw new IllegalArgumentException(String.format( "Omitted keys on hardwareId: %s. Please set number " + "of cores and ram amount.", hardwareId)); } if (specValues.containsKey("disk")) { float disk = Float.parseFloat(specValues.get("disk")); if (disk > 0.0f) { spec.disk = Optional.of(disk); } else { throw new IllegalArgumentException(String.format("Invalid disk value: %s", hardwareId)); } } spec.ram = Integer.parseInt(specValues.get("ram")); spec.cores = Double.parseDouble(specValues.get("cores")); return spec; } public static AutomaticHardwareIdSpec automaticHardwareIdSpecBuilder(double cores, int ram, Optional<Float> disk) { AutomaticHardwareIdSpec spec = new AutomaticHardwareIdSpec(); if (cores <= 0 || ram == 0) { throw new IllegalArgumentException(String.format( "Omitted or wrong minCores and minRam. If you want to" + " use exact values, please set the minCores and minRam values: cores=%s, ram=%s", cores, ram)); } if (disk.isPresent() && disk.get() <= 0.0f) { throw new IllegalArgumentException(String.format("Invalid disk value: %.0f", disk.get())); } spec.disk = disk; spec.cores = cores; spec.ram = ram; return spec; } @Override public String toString() { if (disk.isPresent()) { return String.format("automatic:cores=%s;ram=%s;disk=%.0f", cores, ram, disk.get().floatValue()); } else { return String.format("automatic:cores=%s;ram=%s", cores, ram); } } public double getCores() { return cores; } public int getRam() { return ram; } public Optional<Float> getDisk() { return disk; } }