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Optimized use of JDBC 3.0 ParameterMetaData.getParameterType, caching information about drivers which do not support that feature

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Issue: SPR-11100
This commit is contained in:
Juergen Hoeller
2013-12-10 01:38:57 +01:00
parent 26d143868f
commit 4c8a7899f2
2 changed files with 148 additions and 32 deletions
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63
spring-jdbc/src/main/java/org/springframework/jdbc/core/StatementCreatorUtils.java
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@@ -28,8 +28,11 @@ import java.sql.Types;
import java.util.Arrays;
import java.util.Calendar;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
@@ -60,7 +63,10 @@ public abstract class StatementCreatorUtils {
private static final Log logger = LogFactory.getLog(StatementCreatorUtils.class);
private static Map<Class<?>, Integer> javaTypeToSqlTypeMap = new HashMap<Class<?>, Integer>(32);
static final Set<String> driversWithNoSupportForGetParameterType =
Collections.newSetFromMap(new ConcurrentHashMap<String, Boolean>(1));
private static final Map<Class<?>, Integer> javaTypeToSqlTypeMap = new HashMap<Class<?>, Integer>(32);
static {
/* JDBC 3.0 only - not compatible with e.g. MySQL at present
@@ -219,19 +225,44 @@ public abstract class StatementCreatorUtils {
private static void setNull(PreparedStatement ps, int paramIndex, int sqlType, String typeName) throws SQLException {
if (sqlType == SqlTypeValue.TYPE_UNKNOWN) {
boolean useSetObject = false;
sqlType = Types.NULL;
try {
sqlType = ps.getParameterMetaData().getParameterType(paramIndex);
}
catch (Throwable ex) {
if (logger.isDebugEnabled()) {
logger.debug("JDBC 3.0 getParameterType call not supported - using fallback method instead: " + ex);
}
// JDBC driver not compliant with JDBC 3.0 -> proceed with database-specific checks
Integer sqlTypeToUse = null;
DatabaseMetaData dbmd = null;
String jdbcDriverName = null;
boolean checkGetParameterType = true;
if (!driversWithNoSupportForGetParameterType.isEmpty()) {
try {
DatabaseMetaData dbmd = ps.getConnection().getMetaData();
dbmd = ps.getConnection().getMetaData();
jdbcDriverName = dbmd.getDriverName();
checkGetParameterType = !driversWithNoSupportForGetParameterType.contains(jdbcDriverName);
}
catch (Throwable ex) {
logger.debug("Could not check connection metadata", ex);
}
}
if (checkGetParameterType) {
try {
sqlTypeToUse = ps.getParameterMetaData().getParameterType(paramIndex);
}
catch (Throwable ex) {
if (logger.isDebugEnabled()) {
logger.debug("JDBC 3.0 getParameterType call not supported - using fallback method instead: " + ex);
}
}
}
if (sqlTypeToUse == null) {
// JDBC driver not compliant with JDBC 3.0 -> proceed with database-specific checks
sqlTypeToUse = Types.NULL;
try {
if (dbmd == null) {
dbmd = ps.getConnection().getMetaData();
}
if (jdbcDriverName == null) {
jdbcDriverName = dbmd.getDriverName();
}
if (checkGetParameterType) {
driversWithNoSupportForGetParameterType.add(jdbcDriverName);
}
String databaseProductName = dbmd.getDatabaseProductName();
String jdbcDriverName = dbmd.getDriverName();
if (databaseProductName.startsWith("Informix") ||
jdbcDriverName.startsWith("Microsoft SQL Server")) {
useSetObject = true;
@@ -240,18 +271,18 @@ public abstract class StatementCreatorUtils {
jdbcDriverName.startsWith("jConnect") ||
jdbcDriverName.startsWith("SQLServer")||
jdbcDriverName.startsWith("Apache Derby")) {
sqlType = Types.VARCHAR;
sqlTypeToUse = Types.VARCHAR;
}
}
catch (Throwable ex2) {
logger.debug("Could not check database or driver name", ex2);
catch (Throwable ex) {
logger.debug("Could not check connection metadata", ex);
}
}
if (useSetObject) {
ps.setObject(paramIndex, null);
}
else {
ps.setNull(paramIndex, sqlType);
ps.setNull(paramIndex, sqlTypeToUse);
}
}
else if (typeName != null) {