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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.android.v4.routine;

import com.gh.bmd.jrt.android.builder.InvocationMissingException;
import com.gh.bmd.jrt.android.invocation.AndroidTemplateInvocation;
import com.gh.bmd.jrt.channel.ResultChannel;
import com.gh.bmd.jrt.invocation.Invocation;
import com.gh.bmd.jrt.invocation.InvocationFactory;

import javax.annotation.Nonnull;

/**
 * Invocation used to know whether a loader with a specific ID is present or not.
 * 
 * Created by davide on 1/14/15.
 *
 * @param   the input data type.
 * @param  the output data type.
 */
class MissingLoaderInvocation extends AndroidTemplateInvocation
        implements InvocationFactory {

    private static final MissingLoaderInvocation sInvocation =
            new MissingLoaderInvocation();

    /**
     * Avoid instantiation.
     */
    private MissingLoaderInvocation() {

    }

    /**
     * Returns a factory of missing loader invocations.
     *
     * @param   the input data type.
     * @param  the output data type.
     * @return the factory.
     */
    @SuppressWarnings("unchecked")
    public static  InvocationFactory factoryOf() {

        return (InvocationFactory) sInvocation;
    }

    @Nonnull
    public Invocation newInvocation() {

        return this;
    }

    @Override
    public void onResult(@Nonnull final ResultChannel result) {

        result.abort(new InvocationMissingException());
    }
}