uk.gov.gchq.koryphe.example.function.ExtractKeysExample Maven / Gradle / Ivy

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/*
 * Copyright 2017-2020 Crown Copyright
 *
 * 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 uk.gov.gchq.koryphe.example.function;

import uk.gov.gchq.koryphe.example.KorypheFunctionExample;
import uk.gov.gchq.koryphe.impl.function.ExtractKeys;

import java.util.HashMap;
import java.util.Map;
import java.util.function.Function;
import java.util.stream.Stream;

public class ExtractKeysExample extends KorypheFunctionExample, Iterable> {
    @Override
    public Function, Iterable> getFunction() {
        return new ExtractKeys<>();
    }

    @Override
    public Stream> getInput() {
        final Map first = new HashMap<>();
        first.put("one", 1);
        first.put("two", 2);
        first.put("three", 3);

        final Map second = new HashMap<>();
        second.put("four", 4);
        second.put("five", 5);
        second.put("six", 6);

        final Map third = new HashMap<>();
        third.put("seven", 7);
        third.put("eight", 8);
        third.put("nine", 9);

        return Stream.of(first, second, third);
    }
}