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/*
 * Licensed 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 com.github.dm.jrt.core;

import com.github.dm.jrt.builder.ChannelConfiguration;
import com.github.dm.jrt.builder.ChannelConfiguration.Builder;
import com.github.dm.jrt.builder.ChannelConfiguration.Configurable;
import com.github.dm.jrt.builder.IOChannelBuilder;
import com.github.dm.jrt.channel.IOChannel;

import org.jetbrains.annotations.NotNull;

/**
 * Class implementing a builder of I/O channel objects.
 * 
 * Created by davide-maestroni on 10/25/2014.
 */
class DefaultIOChannelBuilder implements IOChannelBuilder, Configurable {

    private ChannelConfiguration mConfiguration = ChannelConfiguration.DEFAULT_CONFIGURATION;

    /**
     * Avoid direct instantiation.
     */
    DefaultIOChannelBuilder() {

    }

    @NotNull
    public  IOChannel buildChannel() {

        return new DefaultIOChannel(mConfiguration);
    }

    @NotNull
    public Builder channels() {

        return new Builder(this, mConfiguration);
    }

    @NotNull
    @SuppressWarnings("ConstantConditions")
    public IOChannelBuilder setConfiguration(@NotNull final ChannelConfiguration configuration) {

        if (configuration == null) {

            throw new NullPointerException("the invocation configuration must not be null");
        }

        mConfiguration = configuration;
        return this;
    }
}