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/*-
 * #%L
 * Java ECS logging
 * %%
 * Copyright (C) 2019 - 2020 Elastic and contributors
 * %%
 * Licensed to Elasticsearch B.V. under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch B.V. 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.
 * #L%
 */
package co.elastic.logging;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

public class AdditionalField {
    private String key;
    private String value = "";

    public AdditionalField() {
    }

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

    public static List parse(String additionalFields) {
        if (additionalFields == null) {
            return Collections.emptyList();
        }
        String[] split = additionalFields.split(",");
        ArrayList result = new ArrayList(split.length);
        for (String additionalField : split) {
            AdditionalField field = of(additionalField);
            result.add(field);
        }
        return result;
    }

    public static AdditionalField of(String additionalField) {
        String[] keyValue = additionalField.split("=");
        if (keyValue.length != 2) {
            throw new IllegalArgumentException("Could not parse " + additionalField);
        }
        return new AdditionalField(keyValue[0].trim(), keyValue[1].trim());
    }

    public String getKey() {
        return key;
    }

    public void setKey(String key) {
        this.key = key;
    }

    public String getValue() {
        return value;
    }

    public void setValue(String value) {
        this.value = value;
    }
}