/*
* Copyright (c) 2000, 2009, 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.
*
* 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 sun.jvm.hotspot.code;
import java.io.*;
import sun.jvm.hotspot.utilities.*;
/** <P> Classes used for serializing debugging information. These
abstractions are introducted to provide symmetric read and write
operations. </P>
<P>
<UL>
<LI> ScopeValue: describes the value of a variable/expression in a scope
<UL>
<LI> LocationValue: describes a value in a given location (in frame or register)
<LI> ConstantValue: describes a constant
</UL>
</UL>
</P> */
public abstract class ScopeValue {
// Package private enumeration values (FIXME: read from target VM)
static final int LOCATION_CODE = 0;
static final int CONSTANT_INT_CODE = 1;
static final int CONSTANT_OOP_CODE = 2;
static final int CONSTANT_LONG_CODE = 3;
static final int CONSTANT_DOUBLE_CODE = 4;
static final int CONSTANT_OBJECT_CODE = 5;
static final int CONSTANT_OBJECT_ID_CODE = 6;
public boolean isLocation() { return false; }
public boolean isConstantInt() { return false; }
public boolean isConstantDouble() { return false; }
public boolean isConstantLong() { return false; }
public boolean isConstantOop() { return false; }
public boolean isObject() { return false; }
public static ScopeValue readFrom(DebugInfoReadStream stream) {
switch (stream.readInt()) {
case LOCATION_CODE:
return new LocationValue(stream);
case CONSTANT_INT_CODE:
return new ConstantIntValue(stream);
case CONSTANT_OOP_CODE:
return new ConstantOopReadValue(stream);
case CONSTANT_LONG_CODE:
return new ConstantLongValue(stream);
case CONSTANT_DOUBLE_CODE:
/**代码未完, 请加载全部代码(NowJava.com).**/