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1
11 package org.eclipse.jdt.internal.corext.refactoring.typeconstraints.types;
12
13 import java.util.Map  ;
14
15 import org.eclipse.core.runtime.Assert;
16
17 import org.eclipse.jdt.core.IType;
18 import org.eclipse.jdt.core.dom.ITypeBinding;
19
20
21 public abstract class HierarchyType extends TType {
22 private HierarchyType fSuperclass;
23 private HierarchyType[] fInterfaces;
24 private IType fJavaElementType;
25
26 protected HierarchyType(TypeEnvironment environment) {
27 super(environment);
28 }
29
30 protected void initialize(ITypeBinding binding, IType javaElementType) {
31 super.initialize(binding);
32 Assert.isNotNull(javaElementType);
33 fJavaElementType= javaElementType;
34 TypeEnvironment environment= getEnvironment();
35 ITypeBinding superclass= binding.getSuperclass();
36 if (superclass != null) {
37 fSuperclass= (HierarchyType)environment.create(superclass);
38 }
39 ITypeBinding[] interfaces= binding.getInterfaces();
40 fInterfaces= new HierarchyType[interfaces.length];
41 for (int i= 0; i < interfaces.length; i++) {
42 fInterfaces[i]= (HierarchyType)environment.create(interfaces[i]);
43 }
44 }
45
46 public TType getSuperclass() {
47 return fSuperclass;
48 }
49
50 public TType[] getInterfaces() {
51 return fInterfaces;
52 }
53
54 public IType getJavaElementType() {
55 return fJavaElementType;
56 }
57
58 public boolean isSubType(HierarchyType other) {
59 if (getEnvironment() == other.getEnvironment()) {
60 Map cache= getEnvironment().getSubTypeCache();
61 TypeTuple key= new TypeTuple(this, other);
62 Boolean value= (Boolean )cache.get(key);
63 if (value != null)
64 return value.booleanValue();
65 boolean isSub= doIsSubType(other);
66 value= Boolean.valueOf(isSub);
67 cache.put(key, value);
68 return isSub;
69 }
70 return doIsSubType(other);
71 }
72
73 private boolean doIsSubType(HierarchyType other) {
74 if (fSuperclass != null && (other.isTypeEquivalentTo(fSuperclass) || fSuperclass.doIsSubType(other)))
75 return true;
76 for (int i= 0; i < fInterfaces.length; i++) {
77 if (other.isTypeEquivalentTo(fInterfaces[i]) || fInterfaces[i].doIsSubType(other))
78 return true;
79 }
80 return false;
81 }
82
83 protected boolean canAssignToStandardType(StandardType target) {
84 if (target.isJavaLangObject())
85 return true;
86 return isSubType(target);
87 }
88 }
89 |
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