ch.digitalfondue.npjt.mapper.InstantMapper.java Source code

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Here is the source code for ch.digitalfondue.npjt.mapper.InstantMapper.java

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/**
 * Copyright (C) 2015 digitalfondue (info@digitalfondue.ch)
 *
 * 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 ch.digitalfondue.npjt.mapper;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Timestamp;
import java.sql.Types;
import java.time.Instant;

import org.springframework.jdbc.core.RowMapper;
import org.springframework.jdbc.core.namedparam.MapSqlParameterSource;

import ch.digitalfondue.npjt.mapper.ColumnMapperFactory;
import ch.digitalfondue.npjt.mapper.ParameterConverter;

public class InstantMapper extends ColumnMapper {

    private static final int ORDER = Integer.MAX_VALUE - 5;

    public InstantMapper(String name, Class<?> paramType) {
        super(name, paramType);
    }

    @Override
    public Object getObject(ResultSet rs) throws SQLException {
        return toInstant(rs.getTimestamp(name));
    }

    private static Instant toInstant(Timestamp ts) {
        return ts != null ? ts.toInstant() : null;
    }

    public static class Converter implements ParameterConverter {

        @Override
        public boolean accept(Class<?> parameterType) {
            return Instant.class.equals(parameterType);
        }

        @Override
        public void processParameter(String parameterName, Object arg, Class<?> parameterType,
                MapSqlParameterSource ps) {
            ps.addValue(parameterName, arg != null ? Timestamp.from((Instant) arg) : null, Types.TIMESTAMP);
        }

        @Override
        public int order() {
            return ORDER;
        }
    }

    public static class Factory implements ColumnMapperFactory {

        @Override
        public ColumnMapper build(String name, Class<?> paramType) {
            return new InstantMapper(name, paramType);
        }

        @Override
        public int order() {
            return ORDER;
        }

        @Override
        public boolean accept(Class<?> paramType) {
            return Instant.class.equals(paramType);
        }

        @Override
        public RowMapper<Object> getSingleColumnRowMapper(Class<Object> clzz) {
            return new RowMapper<Object>() {
                @Override
                public Object mapRow(ResultSet rs, int rowNum) throws SQLException {
                    return toInstant(rs.getTimestamp(1));
                }
            };
        }
    }
}