org.apache.ambari.server.state.stack.upgrade.Direction.java Source code

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Here is the source code for org.apache.ambari.server.state.stack.upgrade.Direction.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.apache.ambari.server.state.stack.upgrade;

import org.apache.commons.lang.StringUtils;

/**
 * Indicates if an sequence of Groups should be for an upgrade or a downgrade.
 */
public enum Direction {
    UPGRADE, DOWNGRADE;

    /**
     * @return {@code true} if the direction is for upgrade.  Convenience instead
     * of equality checking.
     */
    public boolean isUpgrade() {
        return this == UPGRADE;
    }

    /**
     * @return {@code true} if the direction is for downgrade.  Convenience instead
     * of equality checking.
     */
    public boolean isDowngrade() {
        return this == DOWNGRADE;
    }

    /**
     * @param proper {@code true} to make the first letter captilized
     * @return "upgrade" or "downgrade"
     */
    public String getText(boolean proper) {
        return proper ? StringUtils.capitalize(name().toLowerCase()) : name().toLowerCase();
    }

    /**
     * @param proper {@code true} to make the first letter captilized
     * @return "upgraded" or "downgraded"
     */
    public String getPast(boolean proper) {
        return getText(proper) + "d";
    }

    /**
     * @param proper {@code true} to make the first letter captilized
     * @return "upgrades" or "downgrades"
     */
    public String getPlural(boolean proper) {
        return getText(proper) + "s";
    }

    /**
     * @param proper {@code true} to make the first letter captilized
     * @return "upgrading" or "downgrading"
     */
    public String getVerb(boolean proper) {
        String verb = (this == UPGRADE) ? "upgrading" : "downgrading";

        return proper ? StringUtils.capitalize(verb) : verb;
    }

}