com.facebook.buck.rules.coercer.concat.ImmutableListConcatable.java Source code

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Here is the source code for com.facebook.buck.rules.coercer.concat.ImmutableListConcatable.java

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/*
 * Copyright 2018-present Facebook, Inc.
 *
 * 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.facebook.buck.rules.coercer.concat;

import com.google.common.collect.ImmutableList;
import java.util.List;

/** Concatenates multiple {@link ImmutableList}s. */
public class ImmutableListConcatable<T> implements Concatable<ImmutableList<T>> {

    @Override
    public ImmutableList<T> concat(Iterable<ImmutableList<T>> elements) {
        ImmutableList.Builder<T> builder = ImmutableList.builder();
        for (List<T> list : elements) {
            builder.addAll(list);
        }
        return builder.build();
    }
}