io.coala.persist.JsonToStringConverter.java Source code

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Here is the source code for io.coala.persist.JsonToStringConverter.java

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/* $Id: 331c7dd53896011e4a64255440c25cbc83b09883 $
 * 
 * Part of ZonMW project no. 50-53000-98-156
 * 
 * @license
 * 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.
 * 
 * Copyright (c) 2016 RIVM National Institute for Health and Environment 
 */
package io.coala.persist;

import javax.persistence.AttributeConverter;

import com.fasterxml.jackson.core.TreeNode;

import io.coala.json.JsonUtil;

/**
 * {@link JsonToStringConverter} converts Strings to/from Json trees, an
 * intermediate form useful for lazy deserialization, e.g. into run-time or
 * abstract types
 * 
 * @version $Id: 331c7dd53896011e4a64255440c25cbc83b09883 $
 * @author Rick van Krevelen
 */
public class JsonToStringConverter implements AttributeConverter<TreeNode, String> {
    @Override
    public String convertToDatabaseColumn(final TreeNode attribute) {
        return JsonUtil.stringify(attribute);
    }

    @Override
    public TreeNode convertToEntityAttribute(final String dbData) {
        return JsonUtil.toTree(dbData);
    }
}