From e7c57a86e55868e3563e023a6dc70e7848c55d20 Mon Sep 17 00:00:00 2001
From: Anton Tananaev <anton.tananaev@gmail.com>
Date: Fri, 11 Nov 2011 13:46:52 +0000
Subject:

---
 .../traccar/helper/NamedParameterStatement.java    | 158 +++++++++++++++++++++
 1 file changed, 158 insertions(+)
 create mode 100644 src/org/traccar/helper/NamedParameterStatement.java

(limited to 'src/org/traccar/helper/NamedParameterStatement.java')

diff --git a/src/org/traccar/helper/NamedParameterStatement.java b/src/org/traccar/helper/NamedParameterStatement.java
new file mode 100644
index 000000000..4e5ffc4fc
--- /dev/null
+++ b/src/org/traccar/helper/NamedParameterStatement.java
@@ -0,0 +1,158 @@
+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()));
+        }
+    }
+
+}
-- 
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