/* * Copyright (c) 1998, 1999, 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.sun.tools.jdi; import com.sun.jdi.*; abstract class ValueImpl extends MirrorImpl implements Value {     ValueImpl(VirtualMachine aVm) {        super(aVm);    }     static ValueImpl prepareForAssignment(Value value,                                          ValueContainer destination)                  throws InvalidTypeException, ClassNotLoadedException {        if (value == null) {            /*             * TO DO: Centralize JNI signature knowledge             */            if (destination.signature().length() == 1) {                throw new InvalidTypeException("Can't set a primitive type to null");            }            return null;    // no further checking or conversion necessary        } else {            return ((ValueImpl)value).prepareForAssignmentTo(destination);        }    }     static byte typeValueKey(Value val) {        if (val == null) {            return JDWP.Tag.OBJECT;        } else {            return ((ValueImpl)val).typeValueKey();        }    }     abstract ValueImpl prepareForAssignmentTo(ValueContainer destination)                 throws InvalidTypeException, ClassNotLoadedException;     abstract byte typeValueKey();}