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/*
* Copyright 2010 Anton Tananaev (anton@tananaev.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 org.traccar.helper;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Timestamp;
import java.sql.Types;
import java.util.Map;
import java.util.HashMap;
import java.util.List;
import java.util.LinkedList;
import java.util.Date;
public class NamedParameterStatement {
/**
* Native statement
*/
private PreparedStatement statement;
/**
* Index mapping
*/
private final Map indexMap;
/**
* Query string
*/
private final String parsedQuery;
/**
* Database connection
*/
private AdvancedConnection connection;
/**
* Initialize statement
*/
public NamedParameterStatement(AdvancedConnection connection, String query) {
indexMap = new HashMap();
parsedQuery = parse(query, indexMap);
this.connection = connection;
}
/**
* Parse query
*/
static String parse(String query, Map paramMap) {
int length = query.length();
StringBuilder parsedQuery = new StringBuilder(length);
boolean inSingleQuote = false;
boolean inDoubleQuote = false;
int index = 1;
for(int i = 0; i < length; i++) {
char c = query.charAt(i);
// String end
if (inSingleQuote) {
if (c == '\'') inSingleQuote = false;
} else if (inDoubleQuote) {
if (c == '"') inDoubleQuote = false;
} else {
// String begin
if (c == '\'') {
inSingleQuote = true;
} else if (c == '"') {
inDoubleQuote = true;
} else if (c == ':' && i + 1 < length &&
Character.isJavaIdentifierStart(query.charAt(i + 1))) {
// Identifier name
int j = i + 2;
while (j < length && Character.isJavaIdentifierPart(query.charAt(j))) j++;
String name = query.substring(i + 1, j);
c = '?';
i += name.length();
// Add to list
List indexList = (List) paramMap.get(name);
if (indexList == null) {
indexList = new LinkedList();
paramMap.put(name, indexList);
}
indexList.add(new Integer(index));
index++;
}
}
parsedQuery.append(c);
}
return parsedQuery.toString();
}
public void prepare() throws SQLException {
try {
if (statement == null) {
statement = connection.getInstance().prepareStatement(parsedQuery);
}
} catch (SQLException error) {
connection.reset();
statement = connection.getInstance().prepareStatement(parsedQuery);
}
}
/**
* Execute query with result
*/
public ResultSet executeQuery() throws SQLException {
return statement.executeQuery();
}
/**
* Executes query without result
*/
public int executeUpdate() throws SQLException {
return statement.executeUpdate();
}
/**
* Immediately closes the statement
*/
public void close() throws SQLException {
statement.close();
}
public void setInt(String name, Integer value) throws SQLException {
List indexList = (List) indexMap.get(name);
if (indexList != null) for (Object index: indexList) {
if (value != null) {
statement.setInt((Integer) index, value);
} else {
statement.setNull((Integer) index, Types.INTEGER);
}
}
}
public void setLong(String name, Long value) throws SQLException {
List indexList = (List) indexMap.get(name);
if (indexList != null) for (Object index: indexList) {
if (value != null) {
statement.setLong((Integer) index, value);
} else {
statement.setNull((Integer) index, Types.INTEGER);
}
}
}
public void setBoolean(String name, Boolean value) throws SQLException {
List indexList = (List) indexMap.get(name);
if (indexList != null) for (Object index: indexList) {
if (value != null) {
statement.setBoolean((Integer) index, value);
} else {
statement.setNull((Integer) index, Types.BOOLEAN);
}
}
}
public void setDouble(String name, Double value) throws SQLException {
List indexList = (List) indexMap.get(name);
if (indexList != null) for (Object index: indexList) {
if (value != null) {
statement.setDouble((Integer) index, value);
} else {
statement.setNull((Integer) index, Types.DOUBLE);
}
}
}
public void setTimestamp(String name, Date value) throws SQLException {
List indexList = (List) indexMap.get(name);
if (indexList != null) for (Object index: indexList) {
if (value != null) {
statement.setTimestamp(
(Integer) index, new Timestamp(value.getTime()));
} else {
statement.setNull((Integer) index, Types.TIMESTAMP);
}
}
}
}
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