org.jclouds.compute.util.AutomaticHardwareIdSpec.java Source code

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/*
 * 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;
    }
}