com.nway.spring.jdbc.json.JsonListHandlerNRC.java Source code

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Here is the source code for com.nway.spring.jdbc.json.JsonListHandlerNRC.java

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/*
 * 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 com.nway.spring.jdbc.json;

import java.sql.ResultSet;

import org.springframework.dao.DataAccessException;
import org.springframework.jdbc.core.ResultSetExtractor;

/**
 *
 * @author zdtjss@163.com
 * @param <T>
 *            List
 *
 * @since 2014-03-28
 */
public final class JsonListHandlerNRC implements ResultSetExtractor<String> {
    private static final JsonProcessor JSON_PROCESSOR = new JsonProcessor();

    private String cacheKey;

    public JsonListHandlerNRC(String cacheKey) {

        this.cacheKey = cacheKey;
    }

    @Override
    public String extractData(ResultSet rs) throws DataAccessException {
        try {
            return rs.next() ? JSON_PROCESSOR.toJsonList(rs, cacheKey) : "[]";
        } catch (Exception e) {
            throw new JsonBuildException("JSON ", e);
        }
    }

}