xyz.funjava.functional.validation.fieldprovider.MapStringProvider Maven / Gradle / Ivy

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This is a typesafe validation library with an aim on composition, reuse and safety. Tools are provided to create, compose or enrich validator while maintaining type safety.

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 xyz.funjava.functional.validation.fieldprovider;

import xyz.funjava.functional.validation.Fail;
import xyz.funjava.functional.validation.Validator;

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

/**
 * @author Carlos Sierra Andrés
 */
public class MapStringProvider implements StringProvider {

    private Map _map;

    public MapStringProvider(Map map) {
        _map = map;
    }

    @Override
    public Optional get(String name) {
        return Optional.ofNullable(_map.get(name));
    }

    @Override
    public Validator safeFieldProvider() {
        return FieldProvider.safeCast(Map.class).map(MapStringProvider::new);
    }

}