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Micro Distribution of the Payara Project
There is a newer version: 7.2024.1.Alpha1
/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 * 
 *    Copyright (c) [2018] Payara Foundation and/or its affiliates. All rights reserved.
 * 
 *     The contents of this file are subject to the terms of either the GNU
 *     General Public License Version 2 only ("GPL") or the Common Development
 *     and Distribution License("CDDL") (collectively, the "License").  You
 *     may not use this file except in compliance with the License.  You can
 *     obtain a copy of the License at
 *     https://github.com/payara/Payara/blob/master/LICENSE.txt
 *     See the License for the specific
 *     language governing permissions and limitations under the License.
 * 
 *     When distributing the software, include this License Header Notice in each
 *     file and include the License file at glassfish/legal/LICENSE.txt.
 * 
 *     GPL Classpath Exception:
 *     The Payara Foundation designates this particular file as subject to the "Classpath"
 *     exception as provided by the Payara Foundation in the GPL Version 2 section of the License
 *     file that accompanied this code.
 * 
 *     Modifications:
 *     If applicable, add the following below the License Header, with the fields
 *     enclosed by brackets [] replaced by your own identifying information:
 *     "Portions Copyright [year] [name of copyright owner]"
 * 
 *     Contributor(s):
 *     If you wish your version of this file to be governed by only the CDDL or
 *     only the GPL Version 2, indicate your decision by adding "[Contributor]
 *     elects to include this software in this distribution under the [CDDL or GPL
 *     Version 2] license."  If you don't indicate a single choice of license, a
 *     recipient has the option to distribute your version of this file under
 *     either the CDDL, the GPL Version 2 or to extend the choice of license to
 *     its licensees as provided above.  However, if you add GPL Version 2 code
 *     and therefore, elected the GPL Version 2 license, then the option applies
 *     only if the new code is made subject to such option by the copyright
 *     holder.
 */
package fish.payara.microprofile.metrics;

import java.util.AbstractMap.SimpleEntry;
import java.util.Map;
import java.util.Objects;

public class Tag {

    private String key;

    private String value;

    public Tag() {
    }

    public Tag(String kvString) {
        Map.Entry entry = of(kvString);
        key = entry.getKey();
        value = entry.getValue();
    }

    public Tag(String key, String value) {
        this.key = key.trim();
        this.value = value.trim();
    }

    public static Map.Entry of(String kvString) {
        if (kvString == null || kvString.isEmpty() || !kvString.contains("=")) {
            throw new IllegalArgumentException("Not a key=value pair: " + kvString);
        }
        String[] kvArray = kvString.split("=");
        if (kvArray.length != 2) {
            throw new IllegalArgumentException("Not a key=value pair: " + kvString);
        }
        return new SimpleEntry<>(kvArray[0].trim(), kvArray[1].trim());
    }

    /**
     * @return the key
     */
    public String getKey() {
        return key;
    }

    /**
     * @param key the key to set
     */
    public void setKey(String key) {
        this.key = key;
    }

    /**
     * @return the value
     */
    public String getValue() {
        return value;
    }

    /**
     * @param value the value to set
     */
    public void setValue(String value) {
        this.value = value;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null) {
            return false;
        }
        if (getClass() != obj.getClass()) {
            return false;
        }
        final Tag other = (Tag) obj;
        if (!Objects.equals(this.key, other.key)) {
            return false;
        }
        return Objects.equals(this.value, other.value);
    }

    @Override
    public int hashCode() {
        int hash = 7;
        hash = 17 * hash + Objects.hashCode(this.key);
        hash = 17 * hash + Objects.hashCode(this.value);
        return hash;
    }

    public String toKVString() {
        return new StringBuilder(key).append('=').append(value).toString();
    }

    @Override
    public String toString() {
        return new StringBuilder("Tag{").append(toKVString()).append('}').toString();
    }
}