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comparison graal/com.oracle.truffle.codegen.processor/src/com/oracle/truffle/codegen/processor/template/TemplateMethod.java @ 8592:a80bf36c6a1e

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Refactor to shared template method signature comparison.
author Christian Humer <christian.humer@gmail.com>
date Mon, 01 Apr 2013 11:52:38 +0200
parents 89006c76f737
children 8a1115c92271
comparison
equal deleted inserted replaced
8591:5c58da5b8233 8592:a80bf36c6a1e
26 26
27 import javax.lang.model.element.*; 27 import javax.lang.model.element.*;
28 import javax.lang.model.type.*; 28 import javax.lang.model.type.*;
29 29
30 import com.oracle.truffle.codegen.processor.*; 30 import com.oracle.truffle.codegen.processor.*;
31 import com.oracle.truffle.codegen.processor.typesystem.*;
31 32
32 public class TemplateMethod extends MessageContainer { 33 public class TemplateMethod extends MessageContainer {
33 34
34 private String id; 35 private String id;
35 private final Template template; 36 private final Template template;
159 } 160 }
160 prev = param; 161 prev = param;
161 } 162 }
162 return prev; 163 return prev;
163 } 164 }
165
166 public List<TypeData> getSignature(TypeSystemData typeSystem) {
167 List<TypeData> types = new ArrayList<>();
168 for (ActualParameter parameter : getReturnTypeAndParameters()) {
169 if (!parameter.getSpecification().isSignature()) {
170 continue;
171 }
172 TypeData typeData = parameter.getActualTypeData(typeSystem);
173 if (typeData != null) {
174 types.add(typeData);
175 }
176 }
177 return types;
178 }
179
180 public int compareBySignature(TemplateMethod compareMethod) {
181 TypeSystemData typeSystem = getTemplate().getTypeSystem();
182 if (typeSystem != compareMethod.getTemplate().getTypeSystem()) {
183 throw new IllegalStateException("Cannot compare two methods with different type systems.");
184 }
185
186 List<TypeData> signature1 = getSignature(typeSystem);
187 List<TypeData> signature2 = compareMethod.getSignature(typeSystem);
188 if (signature1.size() != signature2.size()) {
189 return signature1.size() - signature2.size();
190 }
191
192 int result = 0;
193 for (int i = 0; i < signature1.size(); i++) {
194 int typeResult = compareActualParameter(typeSystem, signature1.get(i), signature2.get(i));
195 if (result == 0) {
196 result = typeResult;
197 } else if (Math.signum(result) != Math.signum(typeResult)) {
198 // We cannot define an order.
199 return 0;
200 }
201 }
202
203 return result;
204 }
205
206 private static int compareActualParameter(TypeSystemData typeSystem, TypeData t1, TypeData t2) {
207 int index1 = typeSystem.findType(t1);
208 int index2 = typeSystem.findType(t2);
209 return index1 - index2;
210 }
211
164 } 212 }