aboutsummaryrefslogtreecommitdiff
path: root/src/org/traccar/helper/NamedParameterStatement.java
blob: 0dfbb95518537b9b69d1f84afca5c41d9e7bc8d1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
/*
 * Copyright 2012 Anton Tananaev (anton.tananaev@gmail.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.*;
import java.util.Date;
import java.util.*;

public class NamedParameterStatement {

    /**
     * Native statement
     */
    private PreparedStatement statement;

    /**
     * Index mapping
     */
    private final Map<String, List<Integer>> indexMap;

    /**
     * Query string
     */
    private final String parsedQuery;

    /**
     * Database connection
     */
    private AdvancedConnection connection;

    /**
     * Initialize statement
     */
    public NamedParameterStatement(AdvancedConnection connection, String query) {

        indexMap = new HashMap<String, List<Integer>>();
        parsedQuery = parse(query, indexMap);
        this.connection = connection;
    }

    /**
     * Parse query
     */
    static String parse(String query, Map<String, List<Integer>> 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<Integer> indexList = paramMap.get(name);
                    if (indexList == null) {
                        indexList = new LinkedList<Integer>();
                        paramMap.put(name, indexList);
                    }
                    indexList.add(index);

                    index++;
                }
            }

            parsedQuery.append(c);
        }

        return parsedQuery.toString();
    }

    public void prepare(int autoGeneratedKeys) throws SQLException {
        try {
            if (statement == null) {
                statement = connection.getInstance().prepareStatement(parsedQuery, autoGeneratedKeys);
            }
        } catch (SQLException error) {
            connection.reset();
            statement = connection.getInstance().prepareStatement(parsedQuery, autoGeneratedKeys);
        }
    }

    public void prepare() throws SQLException {
        prepare(Statement.NO_GENERATED_KEYS);
    }

    /**
     * Execute query with result
     */
    public ResultSet executeQuery() throws SQLException {
        return statement.executeQuery();
    }


    /**
     * Executes query without result
     */
    public int executeUpdate() throws SQLException {
        return statement.executeUpdate();
    }

    /**
     * Return generated keys
     */
    public ResultSet getGeneratedKeys() throws SQLException {
        return statement.getGeneratedKeys();
    }

    /**
     * Immediately closes the statement
     */
    public void close() throws SQLException {
        statement.close();
    }

    public void setInt(String name, Integer value) throws SQLException {

        List<Integer> indexList = indexMap.get(name);
        if (indexList != null) for (Integer index: indexList) {
            if (value != null) {
                statement.setInt(index, value);
            } else {
                statement.setNull(index, Types.INTEGER);
            }
        }
    }

    public void setLong(String name, Long value) throws SQLException {

        List<Integer> indexList = indexMap.get(name);
        if (indexList != null) for (Integer index: indexList) {
            if (value != null) {
                statement.setLong(index, value);
            } else {
                statement.setNull(index, Types.INTEGER);
            }
        }
    }

    public void setBoolean(String name, Boolean value) throws SQLException {

        List<Integer> indexList = indexMap.get(name);
        if (indexList != null) for (Integer index: indexList) {
            if (value != null) {
                statement.setBoolean(index, value);
            } else {
                statement.setNull(index, Types.BOOLEAN);
            }
        }
    }

    public void setDouble(String name, Double value) throws SQLException {

        List<Integer> indexList = indexMap.get(name);
        if (indexList != null) for (Integer index: indexList) {
            if (value != null) {
                statement.setDouble(index, value);
            } else {
                statement.setNull(index, Types.DOUBLE);
            }
        }
    }

    public void setTimestamp(String name, Date value) throws SQLException {

        List<Integer> indexList = indexMap.get(name);
        if (indexList != null) for (Integer index: indexList) {
            if (value != null) {
                statement.setTimestamp(index, new Timestamp(value.getTime()));
            } else {
                statement.setNull(index, Types.TIMESTAMP);
            }
        }
    }

    public void setString(String name, String value) throws SQLException {

        List<Integer> indexList = indexMap.get(name);
        if (indexList != null) for (Integer index: indexList) {
            if (value != null) {
                statement.setString(index, value);
            } else {
                statement.setNull(index, Types.VARCHAR);
            }
        }
    }

}