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<TITLE>Getting the Name of a JDBC Type (Java Developers Almanac Example)
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<h3>e291. Getting the Name of a JDBC Type</h3>
This example implements a convenient method for converting a
<code>java.sql.Types</code> integer value into a printable name. This method
is useful for debugging. The method uses reflection to get all the
field names from <code>java.sql.Types.</code> It then retrieves their values
and creates a map of values to names.
<pre> // This method returns the name of a JDBC type.
// Returns null if jdbcType is not recognized.
public static String getJdbcTypeName(int jdbcType) {
// Use reflection to populate a map of int values to names
if (map == null) {
map = new HashMap();
// Get all field in java.sql.Types
Field[] fields = java.sql.Types.class.getFields();
for (int i=0; i<fields.length; i++) {
try {
// Get field name
String name = fields[i].getName();
// Get field value
Integer value = (Integer)fields[i].get(null);
// Add to map
map.put(value, name);
} catch (IllegalAccessException e) {
}
}
}
// Return the JDBC type name
return (String)map.get(new Integer(jdbcType));
}
static Map map;
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