1 files changed, 72 insertions, 0 deletions
diff --git a/javaparser-core/src/main/java/com/github/javaparser/resolution/types/parametrization/ResolvedTypeParameterValueProvider.java b/javaparser-core/src/main/java/com/github/javaparser/resolution/types/parametrization/ResolvedTypeParameterValueProvider.java
new file mode 100644
index 000000000..c310fb5f7
--- /dev/null
+++ b/javaparser-core/src/main/java/com/github/javaparser/resolution/types/parametrization/ResolvedTypeParameterValueProvider.java
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2007-2010 Júlio Vilmar Gesser.
+ * Copyright (C) 2011, 2013-2016 The JavaParser Team.
+ *
+ * This file is part of JavaParser.
+ *
+ * JavaParser can be used either under the terms of
+ * a) the GNU Lesser General Public License as published by
+ *     the Free Software Foundation, either version 3 of the License, or
+ *     (at your option) any later version.
+ * b) the terms of the Apache License
+ *
+ * You should have received a copy of both licenses in LICENCE.LGPL and
+ * LICENCE.APACHE. Please refer to those files for details.
+ *
+ * JavaParser is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ */
+
+package com.github.javaparser.resolution.types.parametrization;
+
+import com.github.javaparser.resolution.declarations.ResolvedTypeParameterDeclaration;
+import com.github.javaparser.resolution.types.ResolvedType;
+import com.github.javaparser.resolution.types.ResolvedWildcard;
+
+import java.util.Optional;
+
+/**
+ * @author Federico Tomassetti
+ */
+public interface ResolvedTypeParameterValueProvider {
+
+    /**
+     * Calculate the value for the given type parameter.
+     * It could be inherited.
+     */
+    Optional<ResolvedType> typeParamValue(ResolvedTypeParameterDeclaration typeParameterDeclaration);
+
+    /**
+     * Replace the type typeParametersValues present in the given type with the ones for which this type
+     * has a value.
+     */
+    default ResolvedType useThisTypeParametersOnTheGivenType(ResolvedType type) {
+        if (type.isTypeVariable()) {
+            ResolvedTypeParameterDeclaration typeParameter = type.asTypeParameter();
+            if (typeParameter.declaredOnType()) {
+                Optional<ResolvedType> typeParam = typeParamValue(typeParameter);
+                if (typeParam.isPresent()) {
+                    type = typeParam.get();
+                }
+            }
+        }
+
+        if (type.isWildcard() && type.asWildcard().isBounded()) {
+            if (type.asWildcard().isExtends()) {
+                return ResolvedWildcard.extendsBound(useThisTypeParametersOnTheGivenType(type.asWildcard().getBoundedType()));
+            } else {
+                return ResolvedWildcard.superBound(useThisTypeParametersOnTheGivenType(type.asWildcard().getBoundedType()));
+            }
+        }
+
+        if (type.isReferenceType()) {
+            type = type.asReferenceType().transformTypeParameters(this::useThisTypeParametersOnTheGivenType);
+        }
+
+        return type;
+    }
+
+    Optional<ResolvedType> getGenericParameterByName(String name);
+}