org.asoem.greyfish.utils.collect.ImmutableMapBuilder.java Source code

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Here is the source code for org.asoem.greyfish.utils.collect.ImmutableMapBuilder.java

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/*
 * Copyright (C) 2015 The greyfish authors
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.asoem.greyfish.utils.collect;

import com.google.common.base.Function;
import com.google.common.collect.ImmutableMap;

import java.util.Map;

public class ImmutableMapBuilder<K, V> extends ImmutableMap.Builder<K, V> {

    public static <K, V> ImmutableMapBuilder<K, V> newInstance() {
        return new ImmutableMapBuilder<K, V>();
    }

    public <E> ImmutableMapBuilder<K, V> putAll(final Iterable<? extends E> iterable,
            final Function<? super E, K> keyFunction, final Function<? super E, V> valueFunction) {

        for (final E e : iterable) {
            put(keyFunction.apply(e), valueFunction.apply(e));
        }

        return this;
    }

    @Override
    public ImmutableMapBuilder<K, V> put(final K key, final V value) {
        super.put(key, value);
        return this;
    }

    @Override
    public ImmutableMapBuilder<K, V> putAll(final Map<? extends K, ? extends V> map) {
        super.putAll(map);
        return this;
    }
}