J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1998-2006 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package com.sun.tools.jdi; |
| 27 | |
| 28 | import com.sun.jdi.*; |
| 29 | |
| 30 | public abstract class PrimitiveValueImpl extends ValueImpl |
| 31 | implements PrimitiveValue { |
| 32 | |
| 33 | PrimitiveValueImpl(VirtualMachine aVm) { |
| 34 | super(aVm); |
| 35 | } |
| 36 | |
| 37 | abstract public boolean booleanValue(); |
| 38 | abstract public byte byteValue(); |
| 39 | abstract public char charValue(); |
| 40 | abstract public short shortValue(); |
| 41 | abstract public int intValue(); |
| 42 | abstract public long longValue(); |
| 43 | abstract public float floatValue(); |
| 44 | abstract public double doubleValue(); |
| 45 | |
| 46 | /* |
| 47 | * The checked versions of the value accessors throw |
| 48 | * InvalidTypeException if the required conversion is |
| 49 | * narrowing and would result in the loss of information |
| 50 | * (either magnitude or precision). |
| 51 | * |
| 52 | * Default implementations here do no checking; subclasses |
| 53 | * override as necessary to do the proper checking. |
| 54 | */ |
| 55 | byte checkedByteValue() throws InvalidTypeException { |
| 56 | return byteValue(); |
| 57 | } |
| 58 | char checkedCharValue() throws InvalidTypeException { |
| 59 | return charValue(); |
| 60 | } |
| 61 | short checkedShortValue() throws InvalidTypeException { |
| 62 | return shortValue(); |
| 63 | } |
| 64 | int checkedIntValue() throws InvalidTypeException { |
| 65 | return intValue(); |
| 66 | } |
| 67 | long checkedLongValue() throws InvalidTypeException { |
| 68 | return longValue(); |
| 69 | } |
| 70 | float checkedFloatValue() throws InvalidTypeException { |
| 71 | return floatValue(); |
| 72 | } |
| 73 | |
| 74 | final boolean checkedBooleanValue() throws InvalidTypeException { |
| 75 | /* |
| 76 | * Always disallow a conversion to boolean from any other |
| 77 | * primitive |
| 78 | */ |
| 79 | if (this instanceof BooleanValue) { |
| 80 | return booleanValue(); |
| 81 | } else { |
| 82 | throw new InvalidTypeException("Can't convert non-boolean value to boolean"); |
| 83 | } |
| 84 | } |
| 85 | |
| 86 | final double checkedDoubleValue() throws InvalidTypeException { |
| 87 | /* |
| 88 | * Can't overflow by converting to double, so this method |
| 89 | * is never overridden |
| 90 | */ |
| 91 | return doubleValue(); |
| 92 | } |
| 93 | |
| 94 | ValueImpl prepareForAssignmentTo(ValueContainer destination) |
| 95 | throws InvalidTypeException { |
| 96 | |
| 97 | return convertForAssignmentTo(destination); |
| 98 | } |
| 99 | |
| 100 | ValueImpl convertForAssignmentTo(ValueContainer destination) |
| 101 | throws InvalidTypeException { |
| 102 | |
| 103 | /* |
| 104 | * TO DO: Centralize JNI signature knowledge |
| 105 | */ |
| 106 | if (destination.signature().length() > 1) { |
| 107 | throw new InvalidTypeException("Can't assign primitive value to object"); |
| 108 | } |
| 109 | |
| 110 | if ((destination.signature().charAt(0) == 'Z') && |
| 111 | (type().signature().charAt(0) != 'Z')) { |
| 112 | throw new InvalidTypeException("Can't assign non-boolean value to a boolean"); |
| 113 | } |
| 114 | |
| 115 | if ((destination.signature().charAt(0) != 'Z') && |
| 116 | (type().signature().charAt(0) == 'Z')) { |
| 117 | throw new InvalidTypeException("Can't assign boolean value to an non-boolean"); |
| 118 | } |
| 119 | |
| 120 | if ("void".equals(destination.typeName())) { |
| 121 | throw new InvalidTypeException("Can't assign primitive value to a void"); |
| 122 | } |
| 123 | |
| 124 | try { |
| 125 | PrimitiveTypeImpl primitiveType = (PrimitiveTypeImpl)destination.type(); |
| 126 | return (ValueImpl)(primitiveType.convert(this)); |
| 127 | } catch (ClassNotLoadedException e) { |
| 128 | throw new InternalException("Signature and type inconsistent for: " + |
| 129 | destination.typeName()); |
| 130 | } |
| 131 | } |
| 132 | } |