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/*-
 * ============LICENSE_START=======================================================
 * openECOMP : SDN-C
 * ================================================================================
 * Copyright (C) 2017 AT&T Intellectual Property. All rights
 * 							reserved.
 * ================================================================================
 * 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.
 * ============LICENSE_END=========================================================
 */

package org.openecomp.sdnc.rm.dao.jdbc;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Timestamp;
import java.util.Collections;
import java.util.List;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.PreparedStatementCreator;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.jdbc.support.GeneratedKeyHolder;
import org.springframework.jdbc.support.KeyHolder;

public class AllocationItemJdbcDaoImpl implements AllocationItemJdbcDao {

	@SuppressWarnings("unused")
	private static final Logger log = LoggerFactory.getLogger(ResourceJdbcDaoImpl.class);

	private static final String INSERT_SQL = "INSERT INTO ALLOCATION_ITEM (\n"
	        + "  resource_id, application_id, resource_set_id, resource_union_id, resource_share_group_list,\n"
	        + "  lt_used, ll_label, rr_used, allocation_time)\nVALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)";

	private static final String UPDATE_SQL = "UPDATE ALLOCATION_ITEM SET\n"
	        + "  resource_share_group_list = ?, lt_used = ?, ll_label = ?, rr_used = ?, allocation_time = ?\n"
	        + "WHERE allocation_item_id = ?";

	private static final String DELETE_SQL = "DELETE FROM ALLOCATION_ITEM WHERE allocation_item_id = ?";

	private static final String GET_SQL = "SELECT * FROM ALLOCATION_ITEM WHERE resource_id = ?";

	private JdbcTemplate jdbcTemplate;
	private AllocationItemRowMapper allocationItemRowMapper = new AllocationItemRowMapper();

	@Override
	public void add(final AllocationItem ai) {
		PreparedStatementCreator psc = new PreparedStatementCreator() {

			@Override
			public PreparedStatement createPreparedStatement(Connection dbc) throws SQLException {
				PreparedStatement ps = dbc.prepareStatement(INSERT_SQL, new String[] { "allocation_item_id" });
				ps.setLong(1, ai.resourceId);
				ps.setString(2, ai.applicationId);
				ps.setString(3, ai.resourceSetId);
				ps.setString(4, ai.resourceUnionId);
				ps.setString(5, ai.resourceShareGroupList);
				ps.setLong(6, ai.ltUsed);
				ps.setString(7, ai.llLabel);
				ps.setString(8, ai.rrUsed);
				ps.setTimestamp(9, new Timestamp(ai.allocationTime.getTime()));
				return ps;
			}
		};
		KeyHolder keyHolder = new GeneratedKeyHolder();
		jdbcTemplate.update(psc, keyHolder);
		ai.id = keyHolder.getKey().longValue();
	}

	@Override
	public void update(AllocationItem ai) {
		Long ltUsed = ai.ltUsed <= 0 ? null : ai.ltUsed;
		jdbcTemplate.update(UPDATE_SQL, ai.resourceShareGroupList, ltUsed, ai.llLabel, ai.rrUsed, ai.allocationTime,
		        ai.id);
	}

	@Override
	public void delete(long id) {
		jdbcTemplate.update(DELETE_SQL, id);
	}

	@Override
	public List<AllocationItem> getAllocationItems(long resourceId) {
		if (resourceId <= 0)
			return Collections.emptyList();

		return jdbcTemplate.query(GET_SQL, new Object[] { resourceId }, allocationItemRowMapper);
	}

	private static class AllocationItemRowMapper implements RowMapper<AllocationItem> {

		@Override
		public AllocationItem mapRow(ResultSet rs, int n) throws SQLException {
			AllocationItem ai = new AllocationItem();
			ai.id = rs.getLong("allocation_item_id");
			ai.resourceId = rs.getLong("resource_id");
			ai.applicationId = rs.getString("application_id");
			ai.resourceSetId = rs.getString("resource_set_id");
			ai.resourceUnionId = rs.getString("resource_union_id");
			ai.resourceShareGroupList = rs.getString("resource_share_group_list");
			ai.ltUsed = rs.getLong("lt_used");
			ai.llLabel = rs.getString("ll_label");
			ai.rrUsed = rs.getString("rr_used");
			ai.allocationTime = rs.getTimestamp("allocation_time");
			return ai;
		}
	}

	public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {
		this.jdbcTemplate = jdbcTemplate;
	}
}