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Parallel programming on the go

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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.gh.bmd.jrt.routine;

import com.gh.bmd.jrt.builder.RoutineBuilder;
import com.gh.bmd.jrt.builder.RoutineConfiguration;
import com.gh.bmd.jrt.invocation.InvocationFactory;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;

/**
 * Class implementing a builder of routine objects based on an invocation class token.
 * 
 * Created by davide on 9/21/14.
 *
 * @param   the input data type.
 * @param  the output data type.
 */
class DefaultRoutineBuilder implements RoutineBuilder {

    //TODO: interface

    private final InvocationFactory mFactory;

    private RoutineConfiguration mConfiguration;

    /**
     * Constructor.
     *
     * @param factory the invocation factory.
     * @throws java.lang.NullPointerException if the class token is null.
     */
    @SuppressWarnings("ConstantConditions")
    DefaultRoutineBuilder(@Nonnull final InvocationFactory factory) {

        if (factory == null) {

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

        mFactory = factory;
    }

    @Nonnull
    @Override
    public Routine buildRoutine() {

        return new DefaultRoutine(RoutineConfiguration.notNull(mConfiguration),
                                                 mFactory);
    }

    @Nonnull
    @Override
    public RoutineBuilder withConfiguration(
            @Nullable final RoutineConfiguration configuration) {

        mConfiguration = configuration;
        return this;
    }
}