| 1 | /* |
|---|---|
| 2 | * Copyright (C) 2007-2010 Júlio Vilmar Gesser. |
| 3 | * Copyright (C) 2011, 2013-2020 The JavaParser Team. |
| 4 | * |
| 5 | * This file is part of JavaParser. |
| 6 | * |
| 7 | * JavaParser can be used either under the terms of |
| 8 | * a) the GNU Lesser General Public License as published by |
| 9 | * the Free Software Foundation, either version 3 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * b) the terms of the Apache License |
| 12 | * |
| 13 | * You should have received a copy of both licenses in LICENCE.LGPL and |
| 14 | * LICENCE.APACHE. Please refer to those files for details. |
| 15 | * |
| 16 | * JavaParser is distributed in the hope that it will be useful, |
| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 19 | * GNU Lesser General Public License for more details. |
| 20 | */ |
| 21 | |
| 22 | package com.github.javaparser.resolution.types.parametrization; |
| 23 | |
| 24 | import com.github.javaparser.resolution.declarations.ResolvedTypeParameterDeclaration; |
| 25 | import com.github.javaparser.resolution.types.ResolvedType; |
| 26 | import com.github.javaparser.resolution.types.ResolvedWildcard; |
| 27 | |
| 28 | import java.util.Optional; |
| 29 | |
| 30 | /** |
| 31 | * @author Federico Tomassetti |
| 32 | */ |
| 33 | public interface ResolvedTypeParameterValueProvider { |
| 34 | |
| 35 | /** |
| 36 | * Calculate the value for the given type parameter. |
| 37 | * It could be inherited. |
| 38 | */ |
| 39 | Optional<ResolvedType> typeParamValue(ResolvedTypeParameterDeclaration typeParameterDeclaration); |
| 40 | |
| 41 | /** |
| 42 | * Replace the type typeParametersValues present in the given type with the ones for which this type |
| 43 | * has a value. |
| 44 | */ |
| 45 | default ResolvedType useThisTypeParametersOnTheGivenType(ResolvedType type) { |
| 46 | if (type.isTypeVariable()) { |
| 47 | ResolvedTypeParameterDeclaration typeParameter = type.asTypeParameter(); |
| 48 | if (typeParameter.declaredOnType()) { |
| 49 | Optional<ResolvedType> typeParam = typeParamValue(typeParameter); |
| 50 | if (typeParam.isPresent()) { |
| 51 | type = typeParam.get(); |
| 52 | } |
| 53 | } |
| 54 | } |
| 55 | |
| 56 | if (type.isWildcard() && type.asWildcard().isBounded()) { |
| 57 | if (type.asWildcard().isExtends()) { |
| 58 | return ResolvedWildcard.extendsBound(useThisTypeParametersOnTheGivenType(type.asWildcard().getBoundedType())); |
| 59 | } else { |
| 60 | return ResolvedWildcard.superBound(useThisTypeParametersOnTheGivenType(type.asWildcard().getBoundedType())); |
| 61 | } |
| 62 | } |
| 63 | |
| 64 | if (type.isReferenceType()) { |
| 65 | type = type.asReferenceType().transformTypeParameters(this::useThisTypeParametersOnTheGivenType); |
| 66 | } |
| 67 | |
| 68 | return type; |
| 69 | } |
| 70 | |
| 71 | Optional<ResolvedType> getGenericParameterByName(String name); |
| 72 | } |
| 73 |
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