aboutsummaryrefslogtreecommitdiff
path: root/src/net/sourceforge/opentracking/helper/NamedParameterStatement.java
blob: 4e5ffc4fc3a8f0b21fa15d12bef56c1e639e6364 (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
package net.sourceforge.opentracking.helper;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Timestamp;

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 final PreparedStatement statement;

    /**
     * Index mapping
     */
    private final Map indexMap;

    /**
     * Initialize statement
     */
    public NamedParameterStatement(Connection connection, String query)
            throws SQLException {

        indexMap = new HashMap();
        String parsedQuery = parse(query, indexMap);
        statement = connection.prepareStatement(parsedQuery);
    }

    /**
     * Parse query
     */
    static final String parse(String query, Map paramMap) {

        int length = query.length();
        StringBuffer parsedQuery = new StringBuffer(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();
    }

    /**
     * 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, int value) throws SQLException {

        List indexList = (List) indexMap.get(name);
        if (indexList != null) for (Object index: indexList) {
            statement.setInt((Integer) index, value);
        }
    }

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

        List indexList = (List) indexMap.get(name);
        if (indexList != null) for (Object index: indexList) {
            statement.setLong((Integer) index, value);
        }
    }

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

        List indexList = (List) indexMap.get(name);
        if (indexList != null) for (Object index: indexList) {
            statement.setBoolean((Integer) index, value);
        }
    }

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

        List indexList = (List) indexMap.get(name);
        if (indexList != null) for (Object index: indexList) {
            statement.setDouble((Integer) index, value);
        }
    }

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

        List indexList = (List) indexMap.get(name);
        if (indexList != null) for (Object index: indexList) {
            statement.setTimestamp(
                    (Integer) index,
                    new Timestamp(value.getTime()));
        }
    }

}