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/*
 * Copyright 2016 The Netty Project
 *
 * The Netty Project 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:
 *
 *   https://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 io.netty.bootstrap;

import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.ServerChannel;
import io.netty.util.AttributeKey;
import io.netty.util.internal.StringUtil;

import java.util.Map;

/**
 * Exposes the configuration of a {@link ServerBootstrapConfig}.
 */
public final class ServerBootstrapConfig extends AbstractBootstrapConfig {

    ServerBootstrapConfig(ServerBootstrap bootstrap) {
        super(bootstrap);
    }

    /**
     * Returns the configured {@link EventLoopGroup} which will be used for the child channels or {@code null}
     * if non is configured yet.
     */
    @SuppressWarnings("deprecation")
    public EventLoopGroup childGroup() {
        return bootstrap.childGroup();
    }

    /**
     * Returns the configured {@link ChannelHandler} be used for the child channels or {@code null}
     * if non is configured yet.
     */
    public ChannelHandler childHandler() {
        return bootstrap.childHandler();
    }

    /**
     * Returns a copy of the configured options which will be used for the child channels.
     */
    public Map, Object> childOptions() {
        return bootstrap.childOptions();
    }

    /**
     * Returns a copy of the configured attributes which will be used for the child channels.
     */
    public Map, Object> childAttrs() {
        return bootstrap.childAttrs();
    }

    @Override
    public String toString() {
        StringBuilder buf = new StringBuilder(super.toString());
        buf.setLength(buf.length() - 1);
        buf.append(", ");
        EventLoopGroup childGroup = childGroup();
        if (childGroup != null) {
            buf.append("childGroup: ");
            buf.append(StringUtil.simpleClassName(childGroup));
            buf.append(", ");
        }
        Map, Object> childOptions = childOptions();
        if (!childOptions.isEmpty()) {
            buf.append("childOptions: ");
            buf.append(childOptions);
            buf.append(", ");
        }
        Map, Object> childAttrs = childAttrs();
        if (!childAttrs.isEmpty()) {
            buf.append("childAttrs: ");
            buf.append(childAttrs);
            buf.append(", ");
        }
        ChannelHandler childHandler = childHandler();
        if (childHandler != null) {
            buf.append("childHandler: ");
            buf.append(childHandler);
            buf.append(", ");
        }
        if (buf.charAt(buf.length() - 1) == '(') {
            buf.append(')');
        } else {
            buf.setCharAt(buf.length() - 2, ')');
            buf.setLength(buf.length() - 1);
        }

        return buf.toString();
    }
}