com.arpnetworking.metrics.jvm.collectors.MetricsUtil Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of jvm-extra Show documentation

Extension to metrics-java-client for collecting JVM metrics.

There is a newer version: 0.13.1

/**
 * Copyright 2015 Groupon.com
 *
 * Licensed 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 com.arpnetworking.metrics.jvm.collectors;

/**
 * An utility class of JVM metrics.
 *
 * @author Deepika Misra (deepika at groupon dot com)
 */
/* package private */ final class MetricsUtil {

    /**
     * Converts blank spaced strings to camel case with upper case.
     *
     * @param string An instance of String to be converted.
     * @return A camel cased version of the given string.
     */
    /* package private */ static String convertToSnakeCase(final String string) {
        final StringBuilder builder = new StringBuilder();
        boolean isPrevCharLowerCase = false;
        for (int index = 0; index < string.length(); index++) {
            final char character = string.charAt(index);
            if (character == ' ') {
                builder.append("_");
            } else if (Character.isUpperCase(character) && isPrevCharLowerCase) {
                builder.append("_").append(Character.toLowerCase(character));
            } else {
                builder.append(Character.toLowerCase(character));
            }
            isPrevCharLowerCase = Character.isLowerCase(character);
        }
        return builder.toString();
    }

    private MetricsUtil() {}
}