Mercurial > hg > graal-compiler
annotate graal/com.oracle.truffle.api/src/com/oracle/truffle/api/frame/FrameDescriptor.java @ 8517:79cc35a1c2e7
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author | Christos Kotselidis <christos.kotselidis@oracle.com> |
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date | Mon, 25 Mar 2013 22:57:00 +0100 |
parents | f07cafa29db1 |
children | 07f8d136a05e |
rev | line source |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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1 /* |
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2 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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4 * |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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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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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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7 * published by the Free Software Foundation. |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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8 * |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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13 * accompanied this code). |
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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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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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Introduction of the Truffle API for efficient implementation of dynamic languages on top of the Graal VM. New projects com.oracle.truffle.api for the API definition and com.oracle.truffle.api.test for API tests and documentation.
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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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 */ |
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23 package com.oracle.truffle.api.frame; |
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24 |
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25 import java.util.*; |
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26 |
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27 /** |
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28 * Descriptor of the slots of frame objects. Multiple frame instances are associated with one such |
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29 * descriptor. |
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30 */ |
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31 public final class FrameDescriptor { |
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32 |
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33 protected final TypeConversion typeConversion; |
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34 private final ArrayList<FrameSlotImpl> slots; |
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35 private FrameVersionImpl lastVersion; |
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36 private final HashMap<Object, FrameSlotImpl> identifierToSlotMap; |
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37 |
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38 public FrameDescriptor() { |
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39 this(DefaultTypeConversion.getInstance()); |
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40 } |
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41 |
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42 public FrameDescriptor(TypeConversion typeConversion) { |
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43 this.typeConversion = typeConversion; |
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44 slots = new ArrayList<>(); |
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45 identifierToSlotMap = new HashMap<>(); |
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46 lastVersion = new FrameVersionImpl(); |
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47 } |
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48 |
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49 public FrameSlot addFrameSlot(Object identifier) { |
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50 return addFrameSlot(identifier, typeConversion.getTopType()); |
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51 } |
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52 |
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53 public FrameSlot addFrameSlot(Object identifier, Class<?> type) { |
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54 assert !identifierToSlotMap.containsKey(identifier); |
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55 FrameSlotImpl slot = new FrameSlotImpl(this, identifier, slots.size(), type); |
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56 slots.add(slot); |
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57 identifierToSlotMap.put(identifier, slot); |
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58 return slot; |
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59 } |
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60 |
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61 public FrameSlot findFrameSlot(Object identifier) { |
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62 return identifierToSlotMap.get(identifier); |
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63 } |
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64 |
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65 public FrameSlot findOrAddFrameSlot(Object identifier) { |
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66 FrameSlot result = findFrameSlot(identifier); |
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67 if (result != null) { |
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68 return result; |
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69 } |
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70 return addFrameSlot(identifier); |
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71 } |
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72 |
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73 public FrameVersion getCurrentVersion() { |
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74 return lastVersion; |
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75 } |
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76 |
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77 public int getSize() { |
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78 return slots.size(); |
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79 } |
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80 |
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81 public List<? extends FrameSlot> getSlots() { |
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82 return Collections.unmodifiableList(slots); |
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83 } |
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84 |
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85 protected void appendVersion(FrameVersionImpl newVersion) { |
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86 lastVersion.next = newVersion; |
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87 lastVersion = newVersion; |
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88 } |
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89 } |
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90 |
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91 class FrameVersionImpl implements FrameVersion { |
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92 |
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93 protected FrameVersionImpl next; |
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94 |
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95 @Override |
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96 public final FrameVersion getNext() { |
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97 return next; |
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98 } |
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99 } |
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100 |
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101 class TypeChangeFrameVersionImpl extends FrameVersionImpl implements FrameVersion.TypeChange { |
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102 |
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103 private final FrameSlotImpl slot; |
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104 private final Class<?> oldType; |
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105 private final Class<?> newType; |
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106 |
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107 protected TypeChangeFrameVersionImpl(FrameSlotImpl slot, Class<?> oldType, Class<?> newType) { |
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108 this.slot = slot; |
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109 this.oldType = oldType; |
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110 this.newType = newType; |
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111 } |
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112 |
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113 @Override |
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114 public final void applyTransformation(Frame frame) { |
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115 Object value = slot.getValue(oldType, frame); |
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116 slot.setValue(newType, frame, value); |
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117 } |
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118 } |
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119 |
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120 class FrameSlotImpl implements FrameSlot { |
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121 |
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122 private final FrameDescriptor descriptor; |
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123 private final Object identifier; |
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124 private final int index; |
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125 private Class<?> type; |
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126 private ArrayList<FrameSlotTypeListener> listeners; |
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127 |
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128 protected FrameSlotImpl(FrameDescriptor descriptor, Object identifier, int index, Class<?> type) { |
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129 this.descriptor = descriptor; |
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130 this.identifier = identifier; |
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131 this.index = index; |
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132 this.type = type; |
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133 assert type != null; |
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134 } |
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135 |
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136 public Object getIdentifier() { |
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137 return identifier; |
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138 } |
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139 |
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140 public int getIndex() { |
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141 return index; |
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142 } |
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143 |
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144 public Class<?> getType() { |
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145 return type; |
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146 } |
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147 |
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148 protected Object getValue(Class<?> accessType, Frame frame) { |
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149 if (accessType == Integer.class) { |
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150 return frame.getInt(this); |
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151 } else if (accessType == Long.class) { |
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152 return frame.getLong(this); |
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153 } else if (accessType == Float.class) { |
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154 return frame.getFloat(this); |
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155 } else if (accessType == Double.class) { |
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156 return frame.getDouble(this); |
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157 } else { |
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158 return frame.getObject(this); |
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159 } |
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160 } |
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161 |
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162 protected void setValue(Class<?> accessType, Frame frame, Object value) { |
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163 Object newValue = descriptor.typeConversion.convertTo(accessType, value); |
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164 if (accessType == Integer.class) { |
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165 frame.setInt(this, (Integer) newValue); |
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166 } else if (accessType == Long.class) { |
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167 frame.setLong(this, (Long) newValue); |
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168 } else if (accessType == Float.class) { |
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169 frame.setFloat(this, (Float) newValue); |
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170 } else if (accessType == Double.class) { |
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171 frame.setDouble(this, (Double) newValue); |
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172 } else { |
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173 frame.setObject(this, newValue); |
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174 } |
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175 } |
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176 |
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177 public void setType(final Class<?> type) { |
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178 final Class<?> oldType = this.type; |
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179 this.type = type; |
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180 ArrayList<FrameSlotTypeListener> oldListeners = this.listeners; |
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181 this.listeners = null; |
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182 if (oldListeners != null) { |
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183 for (FrameSlotTypeListener listener : oldListeners) { |
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184 listener.typeChanged(this, oldType); |
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185 } |
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186 } |
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187 descriptor.appendVersion(new TypeChangeFrameVersionImpl(this, oldType, type)); |
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188 } |
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189 |
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190 @Override |
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191 public String toString() { |
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192 return "[" + index + "," + identifier + "]"; |
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193 } |
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194 |
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195 @Override |
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196 public void registerOneShotTypeListener(FrameSlotTypeListener listener) { |
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197 if (listeners == null) { |
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198 listeners = new ArrayList<>(); |
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199 } |
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200 listeners.add(listener); |
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201 } |
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202 } |