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Parameter Source

There is a newer version: 1.0

package com.laamella.parameter_source;

import java.util.HashMap;
import java.util.Map;
import java.util.Optional;

import static java.util.Objects.requireNonNull;

/**
 * This source has no external storage.
 * It only contains key-value pairs that have been put in using the "put" method.
 */
public class InMemoryParameterSource implements ParameterSource {
    private final Map storage = new HashMap<>();

    @Override
    public Optional