/**
 * Copyright © 2016-2018 The Thingsboard Authors
 *
 * 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 org.thingsboard.server.extensions.api.rules;

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

public class RuleProcessingMetaData {

    private final Map<String, Object> md;

    public RuleProcessingMetaData() {
        super();
        this.md = new HashMap<>();
    }

    public <T> void put(String key, T value) {
        md.put(key, value);
    }

    public <T> Optional<T> get(String key) {
        return Optional.ofNullable((T) md.get(key));
    }

    public Map<String, Object> getValues() {
        return Collections.unmodifiableMap(md);
    }
}
