/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF 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.
 */

package org.apache.sshd.common.kex.extension.parser;

import java.io.IOException;

import org.apache.sshd.common.kex.extension.KexExtensionParser;
import org.apache.sshd.common.util.ValidateUtils;
import org.apache.sshd.common.util.buffer.Buffer;

/**
 * @param  <T> Generic extension type
 * @author     <a href="mailto:dev@mina.apache.org">Apache MINA SSHD Project</a>
 */
public abstract class AbstractKexExtensionParser<T> implements KexExtensionParser<T> {
    private final String name;

    protected AbstractKexExtensionParser(String name) {
        this.name = ValidateUtils.checkNotNullAndNotEmpty(name, "No name provided");
    }

    @Override
    public String getName() {
        return name;
    }

    @Override
    public void putExtension(T value, Buffer buffer) throws IOException {
        buffer.putString(getName());
        encode(value, buffer);
    }

    protected abstract void encode(T value, Buffer buffer) throws IOException;
}
