| /* |
| * Copyright (C) 2008 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.harmony.luni.lang.reflect; |
| |
| import java.lang.reflect.Constructor; |
| import java.lang.reflect.GenericDeclaration; |
| import java.lang.reflect.Method; |
| import java.lang.reflect.Type; |
| import java.lang.reflect.TypeVariable; |
| |
| |
| public final class ImplForVariable<D extends GenericDeclaration> |
| implements TypeVariable<D> { |
| private ImplForVariable<D> formalVar; |
| private final GenericDeclaration declOfVarUser; |
| private final String name; |
| private D genericDeclaration; |
| private ListOfTypes bounds; |
| |
| |
| @Override |
| public boolean equals(Object o) { |
| if(!(o instanceof TypeVariable)) { |
| return false; |
| } |
| TypeVariable<?> that = (TypeVariable<?>) o; |
| return getName().equals(that.getName()) && |
| getGenericDeclaration().equals(that.getGenericDeclaration()); |
| } |
| |
| |
| @Override |
| public int hashCode() { |
| return 31 * getName().hashCode() + getGenericDeclaration().hashCode(); |
| } |
| |
| /** |
| * @param genericDecl declaration where a type variable is declared |
| * @param name type variable name |
| * @param bounds class and interface bounds |
| * @api2vm |
| */ |
| ImplForVariable(D genericDecl, String name, ListOfTypes bounds) { |
| this.genericDeclaration = genericDecl; |
| this.name = name; |
| this.bounds = bounds; |
| this.formalVar = this; |
| this.declOfVarUser = null; |
| } |
| |
| /** |
| * @param genericDecl declaration where a type variable is used |
| * @param name type variable name |
| * @api2vm |
| */ |
| ImplForVariable(D genericDecl, String name) { |
| this.name = name; |
| this.declOfVarUser = genericDecl; |
| } |
| |
| static TypeVariable findFormalVar(GenericDeclaration layer, String name) { |
| TypeVariable[] formalVars = layer.getTypeParameters(); |
| for (TypeVariable var : formalVars) { |
| if (name.equals(var.getName())) { |
| return var; |
| } |
| } |
| // resolve() looks up the next level only, if null is returned |
| return null; |
| } |
| |
| static GenericDeclaration nextLayer(GenericDeclaration decl) { |
| if (decl instanceof Class) { |
| // FIXME: Is the following hierarchy correct?: |
| Class cl = (Class)decl; |
| decl = cl.getEnclosingMethod(); |
| if (decl != null) { |
| return decl; |
| } |
| decl = cl.getEnclosingConstructor(); |
| if (decl != null) { |
| return decl; |
| } |
| return cl.getEnclosingClass(); |
| } else if (decl instanceof Method) { |
| return ((Method)decl).getDeclaringClass(); |
| } else if (decl instanceof Constructor) { |
| return ((Constructor)decl).getDeclaringClass(); |
| } |
| throw new RuntimeException("unknown GenericDeclaration2: " |
| + decl.toString()); |
| } |
| |
| void resolve() { |
| if (formalVar == null) { |
| GenericDeclaration curLayer = declOfVarUser; |
| TypeVariable var = null; |
| do { |
| var = findFormalVar(curLayer, name); |
| if (var != null) break; |
| else { |
| curLayer = nextLayer(curLayer); |
| if (curLayer == null) break; // FIXME: SHOULD NEVER HAPPEN! |
| // throw exception: illegal |
| // type variable reference. |
| } |
| } while (true); |
| formalVar = (ImplForVariable<D>)var; |
| this.genericDeclaration = formalVar.genericDeclaration; |
| this.bounds = formalVar.bounds; |
| } |
| } |
| |
| public Type[] getBounds() { |
| resolve(); |
| return bounds.getResolvedTypes().clone(); |
| } |
| |
| public D getGenericDeclaration() { |
| resolve(); |
| return genericDeclaration; |
| } |
| |
| public String getName() { |
| return name; |
| } |
| |
| @Override |
| public String toString() { |
| return name; |
| } |
| } |