org.gridgain.grid.spi.indexing.GridIndexingFieldsResultAdapter Maven / Gradle / Ivy

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/* 
 Copyright (C) GridGain Systems. All Rights Reserved.
 
 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.
 */

/*  _________        _____ __________________        _____
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 *  \____/   /_/     /_/   \_,__/   \____/   \__,_/  /_/   /_/ /_/
 */

package org.gridgain.grid.spi.indexing;

import org.gridgain.grid.util.lang.*;
import org.jetbrains.annotations.*;

import java.util.*;

/**
 * Convenience adapter for {@link GridIndexingFieldsResult}.
 */
public class GridIndexingFieldsResultAdapter implements GridIndexingFieldsResult {
    /** Meta data. */
    private final List metaData;

    /** Result iterator. */
    private final GridCloseableIterator>> it;

    /**
     * Creates query field result composed of field metadata and iterator
     * over queried fields.
     *
     * @param metaData Meta data.
     * @param it Result iterator.
     */
    public GridIndexingFieldsResultAdapter(@Nullable List metaData,
        GridCloseableIterator>> it) {
        this.metaData = metaData != null ? Collections.unmodifiableList(metaData) : null;
        this.it = it;
    }

    /** {@inheritDoc} */
    @Override public List metaData() {
        return metaData;
    }

    /** {@inheritDoc} */
    @Override public GridCloseableIterator>> iterator() {
        return it;
    }
}