| 1 | /* |
| 2 | * Copyright 2006-2013 the original author or authors. |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | package org.springframework.batch.core.resource; |
| 17 | |
| 18 | import java.sql.PreparedStatement; |
| 19 | import java.sql.SQLException; |
| 20 | import java.util.List; |
| 21 | |
| 22 | import org.springframework.batch.item.database.JdbcCursorItemReader; |
| 23 | import org.springframework.beans.factory.InitializingBean; |
| 24 | import org.springframework.jdbc.core.PreparedStatementSetter; |
| 25 | import org.springframework.jdbc.core.SqlTypeValue; |
| 26 | import org.springframework.jdbc.core.StatementCreatorUtils; |
| 27 | import org.springframework.util.Assert; |
| 28 | |
| 29 | /** |
| 30 | * Implementation of the {@link PreparedStatementSetter} interface that accepts |
| 31 | * a list of values to be set on a PreparedStatement. This is usually used in |
| 32 | * conjunction with the {@link JdbcCursorItemReader} to allow for the replacement |
| 33 | * of bind variables when generating the cursor. The order of the list will be |
| 34 | * used to determine the ordering of setting variables. For example, the first |
| 35 | * item in the list will be the first bind variable set. (i.e. it will |
| 36 | * correspond to the first '?' in the SQL statement) |
| 37 | * |
| 38 | * @author Lucas Ward |
| 39 | * |
| 40 | */ |
| 41 | public class ListPreparedStatementSetter implements |
| 42 | PreparedStatementSetter, InitializingBean { |
| 43 | |
| 44 | private List<?> parameters; |
| 45 | |
| 46 | @Override |
| 47 | public void setValues(PreparedStatement ps) throws SQLException { |
| 48 | for (int i = 0; i < parameters.size(); i++) { |
| 49 | StatementCreatorUtils.setParameterValue(ps, i + 1, SqlTypeValue.TYPE_UNKNOWN, parameters.get(i)); |
| 50 | } |
| 51 | } |
| 52 | |
| 53 | /** |
| 54 | * The parameter values that will be set on the PreparedStatement. |
| 55 | * It is assumed that their order in the List is the order of the parameters |
| 56 | * in the PreparedStatement. |
| 57 | */ |
| 58 | public void setParameters(List<?> parameters) { |
| 59 | this.parameters = parameters; |
| 60 | } |
| 61 | |
| 62 | @Override |
| 63 | public void afterPropertiesSet() throws Exception { |
| 64 | Assert.notNull(parameters, "Parameters must be provided"); |
| 65 | } |
| 66 | } |