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1 /*
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2 * Copyright 2000 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 package sun.jvm.hotspot.types.basic;
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26
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27 import sun.jvm.hotspot.debugger.*;
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28 import sun.jvm.hotspot.types.*;
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29
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30 /** A basic implementation of Field which should be suitable for
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31 cross-platform use. */
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32
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33 public class BasicField implements Field {
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34 protected BasicTypeDataBase db;
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35 protected Type type;
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36
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37 private Type containingType;
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38 private String name;
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39 private long size;
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40 private boolean isStatic;
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41 /** Used for nonstatic fields only */
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42 private long offset;
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43 /** Used for static fields only */
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44 private Address staticFieldAddress;
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45
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46 /** offsetInBytes is ignored if the field is static;
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47 staticFieldAddress is used only if the field is static. */
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48 public BasicField(BasicTypeDataBase db, Type containingType, String name, Type type,
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49 boolean isStatic, long offsetInBytes, Address staticFieldAddress) {
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50 this.db = db;
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51 this.containingType = containingType;
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52 this.name = name;
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53 this.type = type;
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54 this.size = type.getSize();
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55 this.isStatic = isStatic;
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56 this.offset = offsetInBytes;
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57 this.staticFieldAddress = staticFieldAddress;
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58 }
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59
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60 public String getName() {
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61 return name;
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62 }
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63
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64 public Type getType() {
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65 return type;
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66 }
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67
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68 public long getSize() {
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69 return size;
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70 }
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71
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72 public boolean isStatic() {
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73 return isStatic;
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74 }
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75
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76 public long getOffset() throws WrongTypeException {
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77 if (isStatic) {
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78 throw new WrongTypeException("field \"" + name + "\" in class " +
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79 containingType.getName() + " is static");
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80 }
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81 return offset;
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82 }
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83
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84 public Address getStaticFieldAddress() throws WrongTypeException {
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85 if (!isStatic) {
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86 throw new WrongTypeException("field \"" + name + "\" in class " +
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87 containingType.getName() + " is not static");
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88 }
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89 return staticFieldAddress;
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90 }
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91
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92 //--------------------------------------------------------------------------------
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93 // Dereferencing operations for non-static fields
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94 //
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95
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96 public boolean getJBoolean (Address addr) throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
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97 if (isStatic) {
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98 throw new WrongTypeException();
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99 }
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100 return addr.getJBooleanAt(offset);
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101 }
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102 public byte getJByte (Address addr) throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
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103 if (isStatic) {
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104 throw new WrongTypeException();
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105 }
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106 return addr.getJByteAt(offset);
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107 }
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108 public char getJChar (Address addr) throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
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109 if (isStatic) {
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110 throw new WrongTypeException();
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111 }
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112 return addr.getJCharAt(offset);
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113 }
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114 public double getJDouble (Address addr) throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
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115 if (isStatic) {
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116 throw new WrongTypeException();
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117 }
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118 return addr.getJDoubleAt(offset);
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119 }
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120 public float getJFloat (Address addr) throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
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121 if (isStatic) {
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122 throw new WrongTypeException();
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123 }
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124 return addr.getJFloatAt(offset);
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125 }
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126 public int getJInt (Address addr) throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
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127 if (isStatic) {
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128 throw new WrongTypeException();
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129 }
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130 return addr.getJIntAt(offset);
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131 }
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132 public long getJLong (Address addr) throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
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133 if (isStatic) {
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134 throw new WrongTypeException();
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135 }
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136 return addr.getJLongAt(offset);
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137 }
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138 public short getJShort (Address addr) throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
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139 if (isStatic) {
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140 throw new WrongTypeException();
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141 }
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142 return addr.getJShortAt(offset);
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143 }
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144 public long getCInteger (Address addr, CIntegerType type)
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145 throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
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146 if (isStatic) {
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147 throw new WrongTypeException();
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148 }
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149 return addr.getCIntegerAt(offset, type.getSize(), type.isUnsigned());
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150 }
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151 public Address getAddress (Address addr) throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
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152 if (isStatic) {
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153 throw new WrongTypeException();
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154 }
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155 return addr.getAddressAt(offset);
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156 }
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157 public OopHandle getOopHandle(Address addr)
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158 throws UnmappedAddressException, UnalignedAddressException, WrongTypeException, NotInHeapException {
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159 if (isStatic) {
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160 throw new WrongTypeException();
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161 }
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162 return addr.getOopHandleAt(offset);
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163 }
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164
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165 //--------------------------------------------------------------------------------
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166 // Dereferencing operations for static fields
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167 //
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168
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169 public boolean getJBoolean () throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
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170 if (!isStatic) {
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171 throw new WrongTypeException();
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172 }
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173 return staticFieldAddress.getJBooleanAt(0);
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174 }
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175 public byte getJByte () throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
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176 if (!isStatic) {
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177 throw new WrongTypeException();
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178 }
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179 return staticFieldAddress.getJByteAt(0);
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180 }
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181 public char getJChar () throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
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182 if (!isStatic) {
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183 throw new WrongTypeException();
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184 }
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185 return staticFieldAddress.getJCharAt(0);
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186 }
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187 public double getJDouble () throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
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188 if (!isStatic) {
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189 throw new WrongTypeException();
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190 }
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191 return staticFieldAddress.getJDoubleAt(0);
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192 }
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193 public float getJFloat () throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
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194 if (!isStatic) {
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195 throw new WrongTypeException();
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196 }
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197 return staticFieldAddress.getJFloatAt(0);
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198 }
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199 public int getJInt () throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
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200 if (!isStatic) {
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201 throw new WrongTypeException();
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202 }
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203 return staticFieldAddress.getJIntAt(0);
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204 }
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205 public long getJLong () throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
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206 if (!isStatic) {
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207 throw new WrongTypeException();
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208 }
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209 return staticFieldAddress.getJLongAt(0);
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210 }
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211 public short getJShort () throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
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212 if (!isStatic) {
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213 throw new WrongTypeException();
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214 }
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215 return staticFieldAddress.getJShortAt(0);
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216 }
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217 public long getCInteger (CIntegerType type)
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218 throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
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219 if (!isStatic) {
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220 throw new WrongTypeException();
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221 }
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222 return staticFieldAddress.getCIntegerAt(0, type.getSize(), type.isUnsigned());
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223 }
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224 public Address getAddress () throws UnmappedAddressException, UnalignedAddressException, WrongTypeException {
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225 if (!isStatic) {
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226 throw new WrongTypeException();
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227 }
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228 return staticFieldAddress.getAddressAt(0);
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229 }
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230 public OopHandle getOopHandle()
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231 throws UnmappedAddressException, UnalignedAddressException, WrongTypeException, NotInHeapException {
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232 if (!isStatic) {
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233 throw new WrongTypeException();
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234 }
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235 return staticFieldAddress.getOopHandleAt(0);
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236 }
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237 }
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