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The MyBatis SQL mapper framework makes it easier to use a relational database with object-oriented
applications. MyBatis couples objects with stored procedures or SQL statements using a XML descriptor or
annotations. Simplicity is the biggest advantage of the MyBatis data mapper over object relational mapping
tools.
/*
* Copyright 2009-2023 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
*
* https://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.apache.ibatis.logging.jdbc;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.sql.ResultSet;
import java.sql.Statement;
import org.apache.ibatis.logging.Log;
import org.apache.ibatis.reflection.ExceptionUtil;
/**
* Statement proxy to add logging.
*
* @author Clinton Begin
* @author Eduardo Macarron
*/
public final class StatementLogger extends BaseJdbcLogger implements InvocationHandler {
private final Statement statement;
private StatementLogger(Statement stmt, Log statementLog, int queryStack) {
super(statementLog, queryStack);
this.statement = stmt;
}
@Override
public Object invoke(Object proxy, Method method, Object[] params) throws Throwable {
try {
if (Object.class.equals(method.getDeclaringClass())) {
return method.invoke(this, params);
}
if (EXECUTE_METHODS.contains(method.getName())) {
if (isDebugEnabled()) {
debug(" Executing: " + removeExtraWhitespace((String) params[0]), true);
}
if ("executeQuery".equals(method.getName())) {
ResultSet rs = (ResultSet) method.invoke(statement, params);
return rs == null ? null : ResultSetLogger.newInstance(rs, statementLog, queryStack);
} else {
return method.invoke(statement, params);
}
}
if ("getResultSet".equals(method.getName())) {
ResultSet rs = (ResultSet) method.invoke(statement, params);
return rs == null ? null : ResultSetLogger.newInstance(rs, statementLog, queryStack);
} else {
return method.invoke(statement, params);
}
} catch (Throwable t) {
throw ExceptionUtil.unwrapThrowable(t);
}
}
/**
* Creates a logging version of a Statement.
*
* @param stmt
* the statement
* @param statementLog
* the statement log
* @param queryStack
* the query stack
*
* @return the proxy
*/
public static Statement newInstance(Statement stmt, Log statementLog, int queryStack) {
InvocationHandler handler = new StatementLogger(stmt, statementLog, queryStack);
ClassLoader cl = Statement.class.getClassLoader();
return (Statement) Proxy.newProxyInstance(cl, new Class[] { Statement.class }, handler);
}
/**
* return the wrapped statement.
*
* @return the statement
*/
public Statement getStatement() {
return statement;
}
}
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