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The Urban Airship Java client library

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/*
 * Copyright (c) 2013-2016.  Urban Airship and Contributors
 */

package com.urbanairship.api.common.parse;

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

public class MapFieldParserRegistry> implements FieldParserRegistry {

    private final Map> registryMap;
    private final Optional> defaultParser;

    public MapFieldParserRegistry(Map> registryMap) {
        this(registryMap, null);
    }

    public MapFieldParserRegistry(Map> registryMap, FieldParser defaultParser) {
        this.registryMap = registryMap;
        this.defaultParser = Optional.ofNullable(defaultParser);
    }

    @Override
    public Optional> getFieldParser(String fieldName) {
        FieldParser parser = registryMap.get(fieldName);
        if (parser == null && defaultParser.isPresent()) {
            return defaultParser;
        }

        return Optional.ofNullable(registryMap.get(fieldName));
    }
}