org.ownchan.server.persistence.typehandler.auto.PersistableJsonDataTypeHandler.java Source code

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Here is the source code for org.ownchan.server.persistence.typehandler.auto.PersistableJsonDataTypeHandler.java

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/*******************************************************************************
 * @author Stefan Gndhr <stefan@guendhoer.com>
 *
 * @copyright Copyright (c) 2017, Stefan Gndhr <stefan@guendhoer.com>
 * @license AGPL-3.0
 *
 * This code is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License, version 3,
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License, version 3,
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 *******************************************************************************/
package org.ownchan.server.persistence.typehandler.auto;

import java.io.IOException;
import java.sql.CallableStatement;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

import org.apache.commons.lang3.StringUtils;
import org.apache.ibatis.type.BaseTypeHandler;
import org.apache.ibatis.type.JdbcType;
import org.apache.ibatis.type.MappedTypes;
import org.ownchan.server.joint.persistence.valuetype.PersistableJsonData;
import org.ownchan.server.joint.persistence.valuetype.PhysicalContentMetadataLinkYoutube;
import org.ownchan.server.joint.persistence.valuetype.PhysicalContentMetadataUploadImage;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.ObjectReader;
import com.fasterxml.jackson.databind.ObjectWriter;

@MappedTypes({ PhysicalContentMetadataLinkYoutube.class, PhysicalContentMetadataUploadImage.class,
        PersistableJsonData.class })
public class PersistableJsonDataTypeHandler extends BaseTypeHandler<PersistableJsonData> {

    private ObjectReader reader;

    private ObjectWriter writer;

    public PersistableJsonDataTypeHandler() {
        ObjectMapper objectMapper = new ObjectMapper();
        this.reader = objectMapper.reader();
        this.writer = objectMapper.writer();
    }

    @Override
    public void setNonNullParameter(PreparedStatement ps, int i, PersistableJsonData parameter, JdbcType jdbcType)
            throws SQLException {
        try {
            ps.setString(i, writer.writeValueAsString(parameter));
        } catch (JsonProcessingException e) {
            throw new IllegalArgumentException(e.getMessage(), e);
        }
    }

    @Override
    public PersistableJsonData getNullableResult(ResultSet rs, String columnName) throws SQLException {
        return createDbJsonDataFromString(rs.getString(columnName));
    }

    @Override
    public PersistableJsonData getNullableResult(ResultSet rs, int columnIndex) throws SQLException {
        return createDbJsonDataFromString(rs.getString(columnIndex));
    }

    @Override
    public PersistableJsonData getNullableResult(CallableStatement cs, int columnIndex) throws SQLException {
        return createDbJsonDataFromString(cs.getString(columnIndex));
    }

    private PersistableJsonData createDbJsonDataFromString(String jsonString) {
        if (StringUtils.isNotBlank(jsonString)) {
            try {
                return reader.readValue(jsonString);
            } catch (IOException e) {
                throw new IllegalArgumentException(e.getMessage(), e);
            }
        }

        return null;
    }

}