org.jclouds.ec2.domain.InstanceState.java Source code

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Here is the source code for org.jclouds.ec2.domain.InstanceState.java

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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.ec2.domain;

import static com.google.common.base.Preconditions.checkNotNull;

import com.google.common.base.CaseFormat;

/**
 * 
 * The current state of the instance..
 * 
 * @author Adrian Cole
 * @see EC2AsyncClient#describeInstances
 * @see EC2AsyncClient#runInstances
 * @see EC2AsyncClient#terminateInstances
 * 
 */
public enum InstanceState {

    /**
     * the instance is in the process of being launched
     */
    PENDING,

    /**
     * the instance launched (although the boot process might not be completed)
     */
    RUNNING,

    /**
     * the instance started shutting down
     */
    SHUTTING_DOWN,
    /**
     * the instance terminated
     */
    TERMINATED,
    /**
     * the instance is stopping
     */
    STOPPING,
    /**
     * the instance is stopped
     */
    STOPPED, UNRECOGNIZED;

    public String value() {
        return CaseFormat.UPPER_UNDERSCORE.to(CaseFormat.LOWER_HYPHEN, name());
    }

    @Override
    public String toString() {
        return value();
    }

    public static InstanceState fromValue(String state) {
        try {
            return valueOf(CaseFormat.LOWER_HYPHEN.to(CaseFormat.UPPER_UNDERSCORE, checkNotNull(state, "state")));
        } catch (IllegalArgumentException e) {
            return UNRECOGNIZED;
        }
    }

    public static InstanceState fromValue(int v) {
        switch (v) {
        case 0:
            return PENDING;
        case 16:
            return RUNNING;
        case 32:
            return SHUTTING_DOWN;
        case 48:
            return TERMINATED;
        case 64:
            return STOPPING;
        case 80:
            return STOPPED;
        default:
            return UNRECOGNIZED;
        }
    }
}