com.facebook.presto.jdbc.internal.jol.datamodel.CurrentDataModel Maven / Gradle / Ivy
/*
* Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package com.facebook.presto.jdbc.internal.jol.datamodel;
import com.facebook.presto.jdbc.internal.jol.util.VMSupport;
/**
* Current data model as detected by JVM.
*
* @author Aleksey Shipilev
*/
public class CurrentDataModel implements DataModel {
@Override
public int headerSize() {
return VMSupport.OBJ_HEADER_SIZE;
}
@Override
public int sizeOf(String klass) {
if (klass.equals("byte")) return VMSupport.BYTE_SIZE;
if (klass.equals("boolean")) return VMSupport.BOOLEAN_SIZE;
if (klass.equals("short")) return VMSupport.SHORT_SIZE;
if (klass.equals("char")) return VMSupport.CHAR_SIZE;
if (klass.equals("int")) return VMSupport.INT_SIZE;
if (klass.equals("float")) return VMSupport.FLOAT_SIZE;
if (klass.equals("long")) return VMSupport.LONG_SIZE;
if (klass.equals("double")) return VMSupport.DOUBLE_SIZE;
return VMSupport.REF_SIZE;
}
}