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Graylog
There is a newer version: 5.2.7
/**
 * This file is part of Graylog.
 *
 * Graylog is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Graylog is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Graylog.  If not, see .
 */
package org.graylog2.plugin.configuration.fields;

import com.google.common.collect.Lists;

import java.util.List;
import java.util.Locale;

public class TextField extends AbstractConfigurationField {
    public static final String FIELD_TYPE = "text";

    public enum Attribute {
        IS_PASSWORD,
        TEXTAREA
    }

    private String defaultValue;

    private final List attributes;

    public TextField(String name, String humanName, String defaultValue, String description, Optional isOptional) {
        this(name, humanName, defaultValue, description, isOptional, new Attribute[0]);
    }

    public TextField(String name, String humanName, String defaultValue, String description, Attribute... attributes) {
        this(name, humanName, defaultValue, description, Optional.NOT_OPTIONAL, attributes);
    }

    public TextField(String name, String humanName, String defaultValue, String description, Optional isOptional, Attribute... attrs) {
        super(FIELD_TYPE, name, humanName, description, isOptional);
        this.defaultValue = defaultValue;

        this.attributes = Lists.newArrayList();
        if (attrs != null) {
            for (Attribute attribute : attrs) {
                this.attributes.add(attribute.toString().toLowerCase(Locale.ENGLISH));
            }
        }
    }
    public TextField(String name, String humanName, String defaultValue, String description, Optional isOptional, int position, Attribute... attrs) {
        super(FIELD_TYPE, name, humanName, description, isOptional, position);
        this.defaultValue = defaultValue;
        this.attributes = Lists.newArrayList();
        if (attrs != null) {
            for (Attribute attribute : attrs) {
                this.attributes.add(attribute.toString().toLowerCase(Locale.ENGLISH));
            }
        }
    }

    @Override
    public Object getDefaultValue() {
        return defaultValue;
    }

    @Override
    public void setDefaultValue(Object defaultValue) {
        if (defaultValue instanceof String) {
            this.defaultValue = (String) defaultValue;
        }
    }

    @Override
    public List getAttributes() {
        return attributes;
    }
}