/*
* Copyright 2002-2018 the original author or authors.
*
* 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.springframework.jdbc.core;
import java.io.StringReader;
import java.io.StringWriter;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.sql.Blob;
import java.sql.Clob;
import java.sql.DatabaseMetaData;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.sql.Types;
import java.util.Arrays;
import java.util.Calendar;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.core.SpringProperties;
import org.springframework.jdbc.support.SqlValue;
import org.springframework.lang.Nullable;
/**
* Utility methods for PreparedStatementSetter/Creator and CallableStatementCreator
* implementations, providing sophisticated parameter management (including support
* for LOB values).
*
* <p>Used by PreparedStatementCreatorFactory and CallableStatementCreatorFactory,
* but also available for direct use in custom setter/creator implementations.
*
* @author Thomas Risberg
* @author Juergen Hoeller
* @since 1.1
* @see PreparedStatementSetter
* @see PreparedStatementCreator
* @see CallableStatementCreator
* @see PreparedStatementCreatorFactory
* @see CallableStatementCreatorFactory
* @see SqlParameter
* @see SqlTypeValue
* @see org.springframework.jdbc.core.support.SqlLobValue
*/
public abstract class StatementCreatorUtils {
/**
* System property that instructs Spring to ignore {@link java.sql.ParameterMetaData#getParameterType}
* completely, i.e. to never even attempt to retrieve {@link PreparedStatement#getParameterMetaData()}
* for {@link StatementCreatorUtils#setNull} calls.
* <p>The default is "false", trying {@code getParameterType} calls first and falling back to
* {@link PreparedStatement#setNull} / {@link PreparedStatement#setObject} calls based on well-known
* behavior of common databases. Spring records JDBC drivers with non-working {@code getParameterType}
* implementations and won't attempt to call that method for that driver again, always falling back.
* <p>Consider switching this flag to "true" if you experience misbehavior at runtime, e.g. with
* a connection pool setting back the {@link PreparedStatement} instance in case of an exception
* thrown from {@code getParameterType} (as reported on JBoss AS 7).
*/
public static final String IGNORE_GETPARAMETERTYPE_PROPERTY_NAME = "spring.jdbc.getParameterType.ignore";
static boolean shouldIgnoreGetParameterType = SpringProperties.getFlag(IGNORE_GETPARAMETERTYPE_PROPERTY_NAME);
private static final Log logger = LogFactory.getLog(StatementCreatorUtils.class);
private static final Map<Class<?>, Integer> javaTypeToSqlTypeMap = new HashMap<>(32);
static {
javaTypeToSqlTypeMap.put(boolean.class, Types.BOOLEAN);
javaTypeToSqlTypeMap.put(Boolean.class, Types.BOOLEAN);
javaTypeToSqlTypeMap.put(byte.class, Types.TINYINT);
javaTypeToSqlTypeMap.put(Byte.class, Types.TINYINT);
javaTypeToSqlTypeMap.put(short.class, Types.SMALLINT);
javaTypeToSqlTypeMap.put(Short.class, Types.SMALLINT);
javaTypeToSqlTypeMap.put(int.class, Types.INTEGER);
javaTypeToSqlTypeMap.put(Integer.class, Types.INTEGER);
javaTypeToSqlTypeMap.put(long.class, Types.BIGINT);
javaTypeToSqlTypeMap.put(Long.class, Types.BIGINT);
javaTypeToSqlTypeMap.put(BigInteger.class, Types.BIGINT);
javaTypeToSqlTypeMap.put(float.class, Types.FLOAT);
javaTypeToSqlTypeMap.put(Float.class, Types.FLOAT);
javaTypeToSqlTypeMap.put(double.class, Types.DOUBLE);
javaTypeToSqlTypeMap.put(Double.class, Types.DOUBLE);
javaTypeToSqlTypeMap.put(BigDecimal.class, Types.DECIMAL);
javaTypeToSqlTypeMap.put(java.sql.Date.class, Types.DATE);
javaTypeToSqlTypeMap.put(java.sql.Time.class, Types.TIME);
javaTypeToSqlTypeMap.put(java.sql.Timestamp.class, Types.TIMESTAMP);
javaTypeToSqlTypeMap.put(Blob.class, Types.BLOB);
javaTypeToSqlTypeMap.put(Clob.class, Types.CLOB);
}
/**
* Derive a default SQL type from the given Java type.
* @param javaType the Java type to translate
* @return the corresponding SQL type, or {@link SqlTypeValue#TYPE_UNKNOWN} if none found
*/
public static int javaTypeToSqlParameterType(@Nullable Class<?> javaType) {
if (javaType == null) {
return SqlTypeValue.TYPE_UNKNOWN;
}
Integer sqlType = javaTypeToSqlTypeMap.get(javaType);
if (sqlType != null) {
return sqlType;
}
if (Number.class.isAssignableFrom(javaType)) {
return Types.NUMERIC;
}
if (isStringValue(javaType)) {
return Types.VARCHAR;
}
if (isDateValue(javaType) || Calendar.class.isAssignableFrom(javaType)) {
return Types.TIMESTAMP;
}
return SqlTypeValue.TYPE_UNKNOWN;
}
/**
* Set the value for a parameter. The method used is based on the SQL type
* of the parameter and we can handle complex types like arrays and LOBs.
* @param ps the prepared statement or callable statement
* @param paramIndex index of the parameter we are setting
* @param param the parameter as it is declared including type
* @param inValue the value to set
* @throws SQLException if thrown by PreparedStatement methods
*/
public static void setParameterValue(PreparedStatement ps, int paramIndex, SqlParameter param,
@Nullable Object inValue) throws SQLException {
setParameterValueInternal(ps, paramIndex, param.getSqlType(), param.getTypeName(), param.getScale(), inValue);
}
/**
* Set the value for a parameter. The method used is based on the SQL type
* of the parameter and we can handle complex types like arrays and LOBs.
* @param ps the prepared statement or callable statement
* @param paramIndex index of the parameter we are setting
* @param sqlType the SQL type of the parameter
* @param inValue the value to set (plain value or a SqlTypeValue)
* @throws SQLException if thrown by PreparedStatement methods
* @see SqlTypeValue
*/
public static void setParameterValue(PreparedStatement ps, int paramIndex, int sqlType,
@Nullable Object inValue) throws SQLException {
setParameterValueInternal(ps, paramIndex, sqlType, null, null, inValue);
}
/**
* Set the value for a parameter. The method used is based on the SQL type
* of the parameter and we can handle complex types like arrays and LOBs.
* @param ps the prepared statement or callable statement
* @param paramIndex index of the parameter we are setting
* @param sqlType the SQL type of the parameter
* @param typeName the type name of the parameter
* (optional, only used for SQL NULL and SqlTypeValue)
* @param inValue the value to set (plain value or a SqlTypeValue)
* @throws SQLException if thrown by PreparedStatement methods
* @see SqlTypeValue
*/
public static void setParameterValue(PreparedStatement ps, int paramIndex, int sqlType, String typeName,
@Nullable Object inValue) throws SQLException {
setParameterValueInternal(ps, paramIndex, sqlType, typeName, null, inValue);
}
/**
* Set the value for a parameter. The method used is based on the SQL type
* of the parameter and we can handle complex types like arrays and LOBs.
* @param ps the prepared statement or callable statement
* @param paramIndex index of the parameter we are setting
* @param sqlType the SQL type of the parameter
* @param typeName the type name of the parameter
* (optional, only used for SQL NULL and SqlTypeValue)
* @param scale the number of digits after the decimal point
* (for DECIMAL and NUMERIC types)
* @param inValue the value to set (plain value or a SqlTypeValue)
* @throws SQLException if thrown by PreparedStatement methods
* @see SqlTypeValue
*/
private static void setParameterValueInternal(PreparedStatement ps, int paramIndex, int sqlType,
@Nullable String typeName, @Nullable Integer scale, @Nullable Object inValue) throws SQLException {
String typeNameToUse = typeName;
int sqlTypeToUse = sqlType;
Object inValueToUse = inValue;
// override type info?
if (inValue instanceof SqlParameterValue) {
SqlParameterValue parameterValue = (SqlParameterValue) inValue;
if (logger.isDebugEnabled()) {
logger.debug("Overriding type info with runtime info from SqlParameterValue: column index " + paramIndex +
", SQL type " + parameterValue.getSqlType() + ", type name " + parameterValue.getTypeName());
}
if (parameterValue.getSqlType() != SqlTypeValue.TYPE_UNKNOWN) {
sqlTypeToUse = parameterValue.getSqlType();
}
if (parameterValue.getTypeName() != null) {
typeNameToUse = parameterValue.getTypeName();
}
inValueToUse = parameterValue.getValue();
}
if (logger.isTraceEnabled()) {
logger.trace("Setting SQL statement parameter value: column index " + paramIndex +
", parameter value [" + inValueToUse +
"], value class [" + (inValueToUse != null ? inValueToUse.getClass().getName() : "null") +
"], SQL type " + (sqlTypeToUse == SqlTypeValue.TYPE_UNKNOWN ? "unknown" : Integer.toString(sqlTypeToUse)));
}
if (inValueToUse == null) {
setNull(ps, paramIndex, sqlTypeToUse, typeNameToUse);
}
else {
setValue(ps, paramIndex, sqlTypeToUse, typeNameToUse, scale, inValueToUse);
}
}
/**
* Set the specified PreparedStatement parameter to null,
* respecting database-specific peculiarities.
*/
private static void setNull(PreparedStatement ps, int paramIndex, int sqlType, @Nullable String typeName)
throws SQLException {
if (sqlType == SqlTypeValue.TYPE_UNKNOWN || (sqlType == Types.OTHER && typeName == null)) {
boolean useSetObject = false;
Integer sqlTypeToUse = null;
if (!shouldIgnoreGetParameterType) {
try {
sqlTypeToUse = ps.getParameterMetaData().getParameterType(paramIndex);
}
catch (SQLException ex) {
if (logger.isDebugEnabled()) {
logger.debug("JDBC getParameterType call failed - using fallback method instead: " + ex);
}
}
}
if (sqlTypeToUse == null) {
// Proceed with database-specific checks
sqlTypeToUse = Types.NULL;
DatabaseMetaData dbmd = ps.getConnection().getMetaData();
String jdbcDriverName = dbmd.getDriverName();
String databaseProductName = dbmd.getDatabaseProductName();
if (databaseProductName.startsWith("Informix") ||
(jdbcDriverName.startsWith("Microsoft") && jdbcDriverName.contains("SQL Server"))) {
// "Microsoft SQL Server JDBC Driver 3.0" versus "Microsoft JDBC Driver 4.0 for SQL Server"
useSetObject = true;
}
else if (databaseProductName.startsWith("DB2") ||
jdbcDriverName.startsWith("jConnect") ||
jdbcDriverName.startsWith("SQLServer")||
jdbcDriverName.startsWith("Apache Derby")) {
sqlTypeToUse = Types.VARCHAR;
}
}
if (useSetObject) {
ps.setObject(paramIndex, null);
}
else {
ps.setNull(paramIndex, sqlTypeToUse);
}
}
else if (typeName != null) {
ps.setNull(paramIndex, sqlType, typeName);
}
else {
ps.setNull(paramIndex, sqlType);
}
}
private static void setValue(PreparedStatement ps, int paramIndex, int sqlType,
@Nullable String typeName, @Nullable Integer scale, Object inValue) throws SQLException {
if (inValue instanceof SqlTypeValue) {
((SqlTypeValue) inValue).setTypeValue(ps, paramIndex, sqlType, typeName);
}
else if (inValue instanceof SqlValue) {
((SqlValue) inValue).setValue(ps, paramIndex);
}
else if (sqlType == Types.VARCHAR || sqlType == Types.LONGVARCHAR ) {
ps.setString(paramIndex, inValue.toString());
}
else if (sqlType == Types.NVARCHAR || sqlType == Types.LONGNVARCHAR) {
ps.setNString(paramIndex, inValue.toString());
}
else if ((sqlType == Types.CLOB || sqlType == Types.NCLOB) && isStringValue(inValue.getClass())) {
String strVal = inValue.toString();
if (strVal.length() > 4000) {
// Necessary for older Oracle drivers, in particular when running against an Oracle 10 database.
// Should also work fine against other drivers/databases since it uses standard JDBC 4.0 API.
if (sqlType == Types.NCLOB) {
ps.setNClob(paramIndex, new StringReader(strVal), strVal.length());
}
else {
ps.setClob(paramIndex, new StringReader(strVal), strVal.length());
}
return;
}
else {
// Fallback: setString or setNString binding
if (sqlType == Types.NCLOB) {
ps.setNString(paramIndex, strVal);
}
else {
ps.setString(paramIndex, strVal);
}
}
}
else if (sqlType == Types.DECIMAL || sqlType == Types.NUMERIC) {
if (inValue instanceof BigDecimal) {
ps.setBigDecimal(paramIndex, (BigDecimal) inValue);
}
else if (scale != null) {
ps.setObject(paramIndex, inValue, sqlType, scale);
}
else {
ps.setObject(paramIndex, inValue, sqlType);
}
}
else if (sqlType == Types.BOOLEAN) {
if (inValue instanceof Boolean) {
ps.setBoolean(paramIndex, (Boolean) inValue);
}
else {
ps.setObject(paramIndex, inValue, Types.BOOLEAN);
}
}
else if (sqlType == Types.DATE) {
if (inValue instanceof java.util.Date) {
if (inValue instanceof java.sql.Date) {
ps.setDate(paramIndex, (java.sql.Date) inValue);
}
else {
ps.setDate(paramIndex, new java.sql.Date(((java.util.Date) inValue).getTime()));
}
}
else if (inValue instanceof Calendar) {
Calendar cal = (Calendar) inValue;
ps.setDate(paramIndex, new java.sql.Date(cal.getTime().getTime()), cal);
}
else {
ps.setObject(paramIndex, inValue, Types.DATE);
}
}
else if (sqlType == Types.TIME) {
if (inValue instanceof java.util.Date) {
if (inValue instanceof java.sql.Time) {
ps.setTime(paramIndex, (java.sql.Time) inValue);
}
else {
ps.setTime(paramIndex, new java.sql.Time(((java.util.Date) inValue).getTime()));
}
}
else if (inValue instanceof Calendar) {
Calendar cal = (Calendar) inValue;
ps.setTime(paramIndex, new java.sql.Time(cal.getTime().getTime()), cal);
}
else {
ps.setObject(paramIndex, inValue, Types.TIME);
}
}
else if (sqlType == Types.TIMESTAMP) {
if (inValue instanceof java.util.Date) {
if (inValue instanceof java.sql.Timestamp) {
ps.setTimestamp(paramIndex, (java.sql.Timestamp) inValue);
}
else {
ps.setTimestamp(paramIndex, new java.sql.Timestamp(((java.util.Date) inValue).getTime()));
}
}
else if (inValue instanceof Calendar) {
Calendar cal = (Calendar) inValue;
ps.setTimestamp(paramIndex, new java.sql.Timestamp(cal.getTime().getTime()), cal);
}
else {
ps.setObject(paramIndex, inValue, Types.TIMESTAMP);
}
}
else if (sqlType == SqlTypeValue.TYPE_UNKNOWN || (sqlType == Types.OTHER &&
"Oracle".equals(ps.getConnection().getMetaData().getDatabaseProductName()))) {
if (isStringValue(inValue.getClass())) {
ps.setString(paramIndex, inValue.toString());
}
else if (isDateValue(inValue.getClass())) {
ps.setTimestamp(paramIndex, new java.sql.Timestamp(((java.util.Date) inValue).getTime()));
}
else if (inValue instanceof Calendar) {
Calendar cal = (Calendar) inValue;
ps.setTimestamp(paramIndex, new java.sql.Timestamp(cal.getTime().getTime()), cal);
}
else {
// Fall back to generic setObject call without SQL type specified.
ps.setObject(paramIndex, inValue);
}
}
else {
// Fall back to generic setObject call with SQL type specified.
ps.setObject(paramIndex, inValue, sqlType);
}
}
/**
* Check whether the given value can be treated as a String value.
*/
private static boolean isStringValue(Class<?> inValueType) {
// Consider any CharSequence (including StringBuffer and StringBuilder) as a String.
return (CharSequence.class.isAssignableFrom(inValueType) ||
StringWriter.class.isAssignableFrom(inValueType));
}
/**
* Check whether the given value is a {@code java.util.Date}
* (but not one of the JDBC-specific subclasses).
*/
private static boolean isDateValue(Class<?> inValueType) {
return (java.util.Date.class.isAssignableFrom(inValueType) &&
!(java.sql.Date.class.isAssignableFrom(inValueType) ||
java.sql.Time.class.isAssignableFrom(inValueType) ||
java.sql.Timestamp.class.isAssignableFrom(inValueType)));
}
/**
* Clean up all resources held by parameter values which were passed to an
* execute method. This is for example important for closing LOB values.
* @param paramValues parameter values supplied. May be {@code null}.
* @see DisposableSqlTypeValue#cleanup()
* @see org.springframework.jdbc.core.support.SqlLobValue#cleanup()
*/
public static void cleanupParameters(@Nullable Object... paramValues) {
if (paramValues != null) {
cleanupParameters(Arrays.asList(paramValues));
}
}
/**
* Clean up all resources held by parameter values which were passed to an
* execute method. This is for example important for closing LOB values.
* @param paramValues parameter values supplied. May be {@code null}.
* @see DisposableSqlTypeValue#cleanup()
* @see org.springframework.jdbc.core.support.SqlLobValue#cleanup()
*/
public static void cleanupParameters(@Nullable Collection<?> paramValues) {
if (paramValues != null) {
for (Object inValue : paramValues) {
if (inValue instanceof DisposableSqlTypeValue) {
((DisposableSqlTypeValue) inValue).cleanup();
}
else if (inValue instanceof SqlValue) {
((SqlValue) inValue).cleanup();
}
}
}
}
}
