org.openmastery.publisher.core.activity.MetadataContainer.java Source code

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Here is the source code for org.openmastery.publisher.core.activity.MetadataContainer.java

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/**
 * Copyright 2017 New Iron Group, Inc.
 *
 * Licensed under the GNU GENERAL PUBLIC LICENSE, Version 3 (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.gnu.org/licenses/gpl-3.0.en.html
 *
 * 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.openmastery.publisher.core.activity;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import lombok.extern.slf4j.Slf4j;

import java.io.IOException;
import java.util.HashMap;

@Slf4j
public class MetadataContainer {

    private HashMap container = new HashMap();
    private ObjectMapper mapper = new ObjectMapper();

    public void setMetadataField(String key, Object value) {
        container.put(key, value);
    }

    public boolean getMetadataValueAsBoolean(String key) {
        Object value = container.get(key);
        return value != null ? (Boolean) value : false;
    }

    public int getMetadataValueAsInteger(String key) {
        Object value = container.get(key);
        return value != null ? (Integer) value : Integer.MIN_VALUE;
    }

    public String getMetadataValue(String key) {
        Object value = container.get(key);
        return value != null ? value.toString() : null;
    }

    public void fromJson(String metadata) {
        try {
            container = toMetadataMap(metadata);
        } catch (IOException ex) {
            log.error("Failed to convert metadata into map, json=" + metadata, ex);
        }
    }

    private HashMap toMetadataMap(String metadata) throws IOException {
        if (metadata == null) {
            return new HashMap();
        } else {
            return mapper.readValue(metadata, HashMap.class);
        }
    }

    public String toJson() {
        try {
            return mapper.writeValueAsString(container);
        } catch (JsonProcessingException ex) {
            log.error("Failed to convert metadata into json, map=" + container, ex);
            return "";
        }
    }

}