org.apache.ibatis.logging.jdbc.ResultSetLogger Maven / Gradle / Ivy
/**
* Copyright 2009-2017 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.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.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Types;
import java.util.HashSet;
import java.util.Set;
import org.apache.ibatis.logging.Log;
import org.apache.ibatis.reflection.ExceptionUtil;
/**
* ResultSet proxy to add logging
*
* @author Clinton Begin
* @author Eduardo Macarron
*
*/
public final class ResultSetLogger extends BaseJdbcLogger implements InvocationHandler {
private static Set BLOB_TYPES = new HashSet();
private boolean first = true;
private int rows;
private final ResultSet rs;
private final Set blobColumns = new HashSet();
static {
BLOB_TYPES.add(Types.BINARY);
BLOB_TYPES.add(Types.BLOB);
BLOB_TYPES.add(Types.CLOB);
BLOB_TYPES.add(Types.LONGNVARCHAR);
BLOB_TYPES.add(Types.LONGVARBINARY);
BLOB_TYPES.add(Types.LONGVARCHAR);
BLOB_TYPES.add(Types.NCLOB);
BLOB_TYPES.add(Types.VARBINARY);
}
private ResultSetLogger(ResultSet rs, Log statementLog, int queryStack) {
super(statementLog, queryStack);
this.rs = rs;
}
@Override
public Object invoke(Object proxy, Method method, Object[] params) throws Throwable {
try {
if (Object.class.equals(method.getDeclaringClass())) {
return method.invoke(this, params);
}
Object o = method.invoke(rs, params);
if ("next".equals(method.getName())) {
if (((Boolean) o)) {
rows++;
if (isTraceEnabled()) {
ResultSetMetaData rsmd = rs.getMetaData();
final int columnCount = rsmd.getColumnCount();
if (first) {
first = false;
printColumnHeaders(rsmd, columnCount);
}
printColumnValues(columnCount);
}
} else {
debug(" Total: " + rows, false);
}
}
clearColumnInfo();
return o;
} catch (Throwable t) {
throw ExceptionUtil.unwrapThrowable(t);
}
}
private void printColumnHeaders(ResultSetMetaData rsmd, int columnCount) throws SQLException {
StringBuilder row = new StringBuilder();
row.append(" Columns: ");
for (int i = 1; i <= columnCount; i++) {
if (BLOB_TYPES.contains(rsmd.getColumnType(i))) {
blobColumns.add(i);
}
String colname = rsmd.getColumnLabel(i);
row.append(colname);
if (i != columnCount) {
row.append(", ");
}
}
trace(row.toString(), false);
}
private void printColumnValues(int columnCount) {
StringBuilder row = new StringBuilder();
row.append(" Row: ");
for (int i = 1; i <= columnCount; i++) {
String colname;
try {
if (blobColumns.contains(i)) {
colname = "<>";
} else {
colname = rs.getString(i);
}
} catch (SQLException e) {
// generally can't call getString() on a BLOB column
colname = "<>";
}
row.append(colname);
if (i != columnCount) {
row.append(", ");
}
}
trace(row.toString(), false);
}
/*
* Creates a logging version of a ResultSet
*
* @param rs - the ResultSet to proxy
* @return - the ResultSet with logging
*/
public static ResultSet newInstance(ResultSet rs, Log statementLog, int queryStack) {
InvocationHandler handler = new ResultSetLogger(rs, statementLog, queryStack);
ClassLoader cl = ResultSet.class.getClassLoader();
return (ResultSet) Proxy.newProxyInstance(cl, new Class[]{ResultSet.class}, handler);
}
/*
* Get the wrapped result set
*
* @return the resultSet
*/
public ResultSet getRs() {
return rs;
}
}