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com.jfinal.plugin.activerecord.dialect.AnsiSqlDialect Maven / Gradle / Ivy
/**
* Copyright (c) 2011-2021, James Zhan 詹波 ([email protected] ).
*
* 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.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Types;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import com.jfinal.plugin.activerecord.ActiveRecordException;
import com.jfinal.plugin.activerecord.CPI;
import com.jfinal.plugin.activerecord.Model;
import com.jfinal.plugin.activerecord.ModelBuilder;
import com.jfinal.plugin.activerecord.Page;
import com.jfinal.plugin.activerecord.Record;
import com.jfinal.plugin.activerecord.Table;
import com.jfinal.plugin.activerecord.builder.TimestampProcessedModelBuilder;
import com.jfinal.plugin.activerecord.builder.TimestampProcessedRecordBuilder;
/**
* AnsiSqlDialect. Try to use ANSI SQL dialect with ActiveRecordPlugin.
*
* A clever person solves a problem. A wise person avoids it.
*/
public class AnsiSqlDialect extends Dialect {
public AnsiSqlDialect() {
this.modelBuilder = TimestampProcessedModelBuilder.me;
this.recordBuilder = TimestampProcessedRecordBuilder.me;
}
public String forTableBuilderDoBuild(String tableName) {
return "select * from " + tableName + " where 1 = 2";
}
public void forModelSave(Table table, Map attrs, StringBuilder sql, List paras) {
sql.append("insert into ").append(table.getName()).append('(');
StringBuilder temp = new StringBuilder(") values(");
for (Entry e: attrs.entrySet()) {
String colName = e.getKey();
if (table.hasColumnLabel(colName)) {
if (paras.size() > 0) {
sql.append(", ");
temp.append(", ");
}
sql.append(colName);
temp.append('?');
paras.add(e.getValue());
}
}
sql.append(temp.toString()).append(')');
}
public String forModelDeleteById(Table table) {
String[] pKeys = table.getPrimaryKey();
StringBuilder sql = new StringBuilder(45);
sql.append("delete from ");
sql.append(table.getName());
sql.append(" where ");
for (int i=0; i 0) {
sql.append(" and ");
}
sql.append(pKeys[i]).append(" = ?");
}
return sql.toString();
}
public void forModelUpdate(Table table, Map attrs, Set modifyFlag, StringBuilder sql, List paras) {
sql.append("update ").append(table.getName()).append(" set ");
String[] pKeys = table.getPrimaryKey();
for (Entry e : attrs.entrySet()) {
String colName = e.getKey();
if (modifyFlag.contains(colName) && !isPrimaryKey(colName, pKeys) && table.hasColumnLabel(colName)) {
if (paras.size() > 0) {
sql.append(", ");
}
sql.append(colName).append(" = ? ");
paras.add(e.getValue());
}
}
sql.append(" where ");
for (int i=0; i 0) {
sql.append(" and ");
}
sql.append(pKeys[i]).append(" = ?");
paras.add(attrs.get(pKeys[i]));
}
}
public String forModelFindById(Table table, String columns) {
StringBuilder sql = new StringBuilder("select ").append(columns).append(" from ");
sql.append(table.getName());
sql.append(" where ");
String[] pKeys = table.getPrimaryKey();
for (int i=0; i 0) {
sql.append(" and ");
}
sql.append(pKeys[i]).append(" = ?");
}
return sql.toString();
}
public String forDbFindById(String tableName, String[] pKeys) {
tableName = tableName.trim();
trimPrimaryKeys(pKeys);
StringBuilder sql = new StringBuilder("select * from ").append(tableName).append(" where ");
for (int i=0; i 0) {
sql.append(" and ");
}
sql.append(pKeys[i]).append(" = ?");
}
return sql.toString();
}
public String forDbDeleteById(String tableName, String[] pKeys) {
tableName = tableName.trim();
trimPrimaryKeys(pKeys);
StringBuilder sql = new StringBuilder("delete from ").append(tableName).append(" where ");
for (int i=0; i 0) {
sql.append(" and ");
}
sql.append(pKeys[i]).append(" = ?");
}
return sql.toString();
}
public void forDbSave(String tableName, String[] pKeys, Record record, StringBuilder sql, List paras) {
tableName = tableName.trim();
trimPrimaryKeys(pKeys);
sql.append("insert into ");
sql.append(tableName).append('(');
StringBuilder temp = new StringBuilder();
temp.append(") values(");
for (Entry e: record.getColumns().entrySet()) {
if (paras.size() > 0) {
sql.append(", ");
temp.append(", ");
}
sql.append(e.getKey());
temp.append('?');
paras.add(e.getValue());
}
sql.append(temp.toString()).append(')');
}
public void forDbUpdate(String tableName, String[] pKeys, Object[] ids, Record record, StringBuilder sql, List paras) {
tableName = tableName.trim();
trimPrimaryKeys(pKeys);
sql.append("update ").append(tableName).append(" set ");
for (Entry e: record.getColumns().entrySet()) {
String colName = e.getKey();
if (!isPrimaryKey(colName, pKeys)) {
if (paras.size() > 0) {
sql.append(", ");
}
sql.append(colName).append(" = ? ");
paras.add(e.getValue());
}
}
sql.append(" where ");
for (int i=0; i 0) {
sql.append(" and ");
}
sql.append(pKeys[i]).append(" = ?");
paras.add(ids[i]);
}
}
/**
* SELECT * FROM subject t1 WHERE (SELECT count(*) FROM subject t2 WHERE t2.id < t1.id AND t2.key = '123') > = 10 AND (SELECT count(*) FROM subject t2 WHERE t2.id < t1.id AND t2.key = '123') < 20 AND t1.key = '123'
*/
public String forPaginate(int pageNumber, int pageSize, StringBuilder findSql) {
throw new ActiveRecordException("Your should not invoke this method because takeOverDbPaginate(...) will take over it.");
}
public boolean isTakeOverDbPaginate() {
return true;
}
@SuppressWarnings("rawtypes")
public Page takeOverDbPaginate(Connection conn, int pageNumber, int pageSize, Boolean isGroupBySql, String totalRowSql, StringBuilder findSql, Object... paras) throws SQLException {
// String totalRowSql = "select count(*) " + replaceOrderBy(sqlExceptSelect);
List result = CPI.query(conn, totalRowSql, paras);
int size = result.size();
if (isGroupBySql == null) {
isGroupBySql = size > 1;
}
long totalRow;
if (isGroupBySql) {
totalRow = size;
} else {
totalRow = (size > 0) ? ((Number)result.get(0)).longValue() : 0;
}
if (totalRow == 0) {
return new Page(new ArrayList(0), pageNumber, pageSize, 0, 0);
}
int totalPage = (int) (totalRow / pageSize);
if (totalRow % pageSize != 0) {
totalPage++;
}
if (pageNumber > totalPage) {
return new Page(new ArrayList(0), pageNumber, pageSize, totalPage, (int)totalRow);
}
// StringBuilder sql = new StringBuilder();
// sql.append(select).append(" ").append(sqlExceptSelect);
PreparedStatement pst = conn.prepareStatement(findSql.toString(), ResultSet.TYPE_FORWARD_ONLY, ResultSet.CONCUR_READ_ONLY);
for (int i=0; i list = buildRecord(rs, pageSize);
if (rs != null) rs.close();
if (pst != null) pst.close();
return new Page(list, pageNumber, pageSize, totalPage, (int) totalRow);
}
private List buildRecord(ResultSet rs, int pageSize) throws SQLException {
List result = new ArrayList();
ResultSetMetaData rsmd = rs.getMetaData();
int columnCount = rsmd.getColumnCount();
String[] labelNames = new String[columnCount + 1];
int[] types = new int[columnCount + 1];
buildLabelNamesAndTypes(rsmd, labelNames, types);
for (int k=0; k columns = record.getColumns();
for (int i=1; i<=columnCount; i++) {
Object value;
if (types[i] < Types.BLOB) {
value = rs.getObject(i);
} else if (types[i] == Types.CLOB) {
value = ModelBuilder.me.handleClob(rs.getClob(i));
} else if (types[i] == Types.NCLOB) {
value = ModelBuilder.me.handleClob(rs.getNClob(i));
} else if (types[i] == Types.BLOB) {
value = ModelBuilder.me.handleBlob(rs.getBlob(i));
} else {
value = rs.getObject(i);
}
columns.put(labelNames[i], value);
}
result.add(record);
}
return result;
}
private void buildLabelNamesAndTypes(ResultSetMetaData rsmd, String[] labelNames, int[] types) throws SQLException {
for (int i=1; i takeOverModelPaginate(Connection conn, Class modelClass, int pageNumber, int pageSize, Boolean isGroupBySql, String totalRowSql, StringBuilder findSql, Object... paras) throws Exception {
// String totalRowSql = "select count(*) " + replaceOrderBy(sqlExceptSelect);
List result = CPI.query(conn, totalRowSql, paras);
int size = result.size();
if (isGroupBySql == null) {
isGroupBySql = size > 1;
}
long totalRow;
if (isGroupBySql) {
totalRow = size;
} else {
totalRow = (size > 0) ? ((Number)result.get(0)).longValue() : 0;
}
if (totalRow == 0) {
return new Page(new ArrayList(0), pageNumber, pageSize, 0, 0); // totalRow = 0;
}
int totalPage = (int) (totalRow / pageSize);
if (totalRow % pageSize != 0) {
totalPage++;
}
if (pageNumber > totalPage) {
return new Page(new ArrayList(0), pageNumber, pageSize, totalPage, (int)totalRow);
}
// --------
// StringBuilder sql = new StringBuilder();
// sql.append(select).append(" ").append(sqlExceptSelect);
PreparedStatement pst = conn.prepareStatement(findSql.toString(), ResultSet.TYPE_FORWARD_ONLY, ResultSet.CONCUR_READ_ONLY);
for (int i=0; i List buildModel(ResultSet rs, Class modelClass, int pageSize) throws SQLException, ReflectiveOperationException {
List result = new ArrayList();
ResultSetMetaData rsmd = rs.getMetaData();
int columnCount = rsmd.getColumnCount();
String[] labelNames = new String[columnCount + 1];
int[] types = new int[columnCount + 1];
buildLabelNamesAndTypes(rsmd, labelNames, types);
for (int k=0; k ar = modelClass.newInstance();
Map attrs = CPI.getAttrs(ar);
for (int i=1; i<=columnCount; i++) {
Object value;
if (types[i] < Types.BLOB) {
value = rs.getObject(i);
} else if (types[i] == Types.CLOB) {
value = ModelBuilder.me.handleClob(rs.getClob(i));
} else if (types[i] == Types.NCLOB) {
value = ModelBuilder.me.handleClob(rs.getNClob(i));
} else if (types[i] == Types.BLOB) {
value = ModelBuilder.me.handleBlob(rs.getBlob(i));
} else {
value = rs.getObject(i);
}
attrs.put(labelNames[i], value);
}
result.add((T)ar);
}
return result;
}
public void fillStatement(PreparedStatement pst, List paras) throws SQLException {
fillStatementHandleDateType(pst, paras);
}
public void fillStatement(PreparedStatement pst, Object... paras) throws SQLException {
fillStatementHandleDateType(pst, paras);
}
}
