/**
* Copyright (c) 2011-2012, James Zhan 詹波 (jfinal@126.com).
*
* 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.jfinal.plugin.activerecord.dialect;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.Map.Entry;
import com.jfinal.plugin.activerecord.Record;
import com.jfinal.plugin.activerecord.TableInfo;
/**
* MysqlDialect.
*/
public class MysqlDialect extends Dialect {
public String forTableInfoBuilderDoBuildTableInfo(String tableName) {
return "select * from `" + tableName + "` where 1 = 2";
}
public void forModelSave(TableInfo tableInfo, Map<String, Object> attrs, StringBuilder sql, List<Object> paras) {
sql.append("insert into `").append(tableInfo.getTableName()).append("`(");
StringBuilder temp = new StringBuilder(") values(");
for (Entry<String, Object> e: attrs.entrySet()) {
String colName = e.getKey();
if (tableInfo.hasColumnLabel(colName)) {
if (paras.size() > 0) {
sql.append(", ");
temp.append(", ");
}
sql.append("`").append(colName).append("`");
temp.append("?");
paras.add(e.getValue());
}
}
sql.append(temp.toString()).append(")");
}
public String forModelDeleteById(TableInfo tInfo) {
String primaryKey = tInfo.getPrimaryKey();
StringBuilder sql = new StringBuilder(45);
sql.append("delete from `");
sql.append(tInfo.getTableName());
sql.append("` where `").append(primaryKey).append("` = ?");
return sql.toString();
}
public void forModelUpdate(TableInfo tableInfo, Map<String, Object> attrs, Set<String> modifyFlag, String primaryKey, Object id, StringBuilder sql, List<Object> paras) {
sql.append("update `").append(tableInfo.getTableName()).append("` set ");
for (Entry<String, Object> e : attrs.entrySet()) {
String colName = e.getKey();
if (!primaryKey.equalsIgnoreCase(colName) && modifyFlag.contains(colName) && tableInfo.hasColumnLabel(colName)) {
if (paras.size() > 0)
sql.append(", ");
sql.append("`").append(colName).append("` = ? ");
paras.add(e.getValue());
}
}
sql.append(" where `").append(primaryKey).append("` = ?"); // .append(" limit 1");
paras.add(id);
}
public String forModelFindById(TableInfo tInfo, String columns) {
StringBuilder sql = new StringBuilder("select ");
if (columns.trim().equals("*")) {
sql.append(columns);
}
else {
String[] columnsArray = columns.split(",");
for (int i=0; i<columnsArray.length; i++) {
if (i > 0)
sql.append(", ");
sql.append("`");
sql.append(columnsArray[i].trim());
sql.append("`");
}
}
sql.append(" from `");
sql.append(tInfo.getTableName());
sql.append("` where `").append(tInfo.getPrimaryKey()).append("` = ?");
return sql.toString();
}
public String forDbFindById(String tableName, String primaryKey, String columns) {
StringBuilder sql = new StringBuilder("select ");
if (columns.trim().equals("*")) {
sql.append(columns);
}
else {
String[] columnsArray = columns.split(",");
for (int i=0; i<columnsArray.length; i++) {
if (i > 0)
sql.append(", ");
sql.append("`").append(columnsArray[i].trim()).append("`");
}
}
sql.append(" from `");
sql.append(tableName.trim());
sql.append("` where `").append(primaryKey).append("` = ?");
return sql.toString();
}
public String forDbDeleteById(String tableName, String primaryKey) {
StringBuilder sql = new StringBuilder("delete from `");
sql.append(tableName.trim());
sql.append("` where `").append(primaryKey).append("` = ?");
return sql.toString();
}
public void forDbSave(StringBuilder sql, List<Object> paras, String tableName, Record record) {
sql.append("insert into `");
sql.append(tableName.trim()).append("`(");
StringBuilder temp = new StringBuilder();
temp.append(") values(");
for (Entry<String, Object> e: record.getColumns().entrySet()) {
if (paras.size() > 0) {
sql.append(", ");
temp.append(", ");
}
sql.append("`").append(e.getKey()).append("`");
temp.append("?");
paras.add(e.getValue());
}
sql.append(temp.toString()).append(")");
}
public void forDbUpdate(String tableName, String primaryKey, Object id, Record record, StringBuilder sql, List<Object> paras) {
sql.append("update `").append(tableName.trim()).append("` set ");
for (Entry<String, Object> e: record.getColumns().entrySet()) {
String colName = e.getKey();
if (!primaryKey.equalsIgnoreCase(colName)) {
if (paras.size() > 0) {
sql.append(", ");
}
sql.append("`").append(colName).append("` = ? ");
paras.add(e.getValue());
}
}
sql.append(" where `").append(primaryKey).append("` = ?"); // .append(" limit 1");
paras.add(id);
}
public void forPaginate(StringBuilder sql, int pageNumber, int pageSize, String select, String sqlExceptSelect) {
int offset = pageSize * (pageNumber - 1);
sql.append(select).append(" ");
sql.append(sqlExceptSelect);
sql.append(" limit ").append(offset).append(", ").append(pageSize); // limit can use one or two '?' to pass paras
}
public boolean isSupportAutoIncrementKey() {
return true;
}
}