1 files changed, 183 insertions, 0 deletions
diff --git a/javaparser-core/src/main/java/com/github/javaparser/resolution/types/ResolvedWildcard.java b/javaparser-core/src/main/java/com/github/javaparser/resolution/types/ResolvedWildcard.java
new file mode 100644
index 000000000..51fd099e4
--- /dev/null
+++ b/javaparser-core/src/main/java/com/github/javaparser/resolution/types/ResolvedWildcard.java
@@ -0,0 +1,183 @@
+/*
+ * 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;
+
+import com.github.javaparser.resolution.declarations.ResolvedTypeParameterDeclaration;
+
+import java.util.List;
+import java.util.Map;
+
+/**
+ * A wildcard can be:
+ * - unbounded (?)
+ * - have a lower bound (? super Number)
+ * - have an upper bound (? extends Number)
+ * It is not possible to have both a lower and an upper bound at the same time.
+ *
+ * @author Federico Tomassetti
+ */
+public class ResolvedWildcard implements ResolvedType {
+
+    public static ResolvedWildcard UNBOUNDED = new ResolvedWildcard(null, null);
+
+    private BoundType type;
+    private ResolvedType boundedType;
+
+    private ResolvedWildcard(BoundType type, ResolvedType boundedType) {
+        if (type == null && boundedType != null) {
+            throw new IllegalArgumentException();
+        }
+        if (type != null && boundedType == null) {
+            throw new IllegalArgumentException();
+        }
+        this.type = type;
+        this.boundedType = boundedType;
+    }
+
+    public static ResolvedWildcard superBound(ResolvedType type) {
+        return new ResolvedWildcard(BoundType.SUPER, type);
+    }
+
+    public static ResolvedWildcard extendsBound(ResolvedType type) {
+        return new ResolvedWildcard(BoundType.EXTENDS, type);
+    }
+
+    @Override
+    public String toString() {
+        return "WildcardUsage{" +
+                "type=" + type +
+                ", boundedType=" + boundedType +
+                '}';
+    }
+
+    public boolean isWildcard() {
+        return true;
+    }
+
+    public ResolvedWildcard asWildcard() {
+        return this;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (!(o instanceof ResolvedWildcard)) return false;
+
+        ResolvedWildcard that = (ResolvedWildcard) o;
+
+        if (boundedType != null ? !boundedType.equals(that.boundedType) : that.boundedType != null) return false;
+        if (type != that.type) return false;
+
+        return true;
+    }
+
+    @Override
+    public int hashCode() {
+        int result = type != null ? type.hashCode() : 0;
+        result = 31 * result + (boundedType != null ? boundedType.hashCode() : 0);
+        return result;
+    }
+
+    @Override
+    public String describe() {
+        if (type == null) {
+            return "?";
+        } else if (type == BoundType.SUPER) {
+            return "? super " + boundedType.describe();
+        } else if (type == BoundType.EXTENDS) {
+            return "? extends " + boundedType.describe();
+        } else {
+            throw new UnsupportedOperationException();
+        }
+    }
+
+    public boolean isSuper() {
+        return type == BoundType.SUPER;
+    }
+
+    public boolean isExtends() {
+        return type == BoundType.EXTENDS;
+    }
+
+    public boolean isBounded() {
+        return isSuper() || isExtends();
+    }
+
+    public ResolvedType getBoundedType() {
+        if (boundedType == null) {
+            throw new IllegalStateException();
+        }
+        return boundedType;
+    }
+
+    @Override
+    public boolean isAssignableBy(ResolvedType other) {
+        if (boundedType == null) {
+            //return other.isReferenceType() && other.asReferenceType().getQualifiedName().equals(Object.class.getCanonicalName());
+            return false;
+        } else if (type == BoundType.SUPER) {
+            return boundedType.isAssignableBy(other);
+        } else if (type == BoundType.EXTENDS) {
+            return false;
+        } else {
+            throw new RuntimeException();
+        }
+    }
+
+    @Override
+    public ResolvedType replaceTypeVariables(ResolvedTypeParameterDeclaration tpToReplace, ResolvedType replaced, Map<ResolvedTypeParameterDeclaration, ResolvedType> inferredTypes) {
+        if (replaced == null) {
+            throw new IllegalArgumentException();
+        }
+        if (boundedType == null) {
+            return this;
+        }
+        ResolvedType boundedTypeReplaced = boundedType.replaceTypeVariables(tpToReplace, replaced, inferredTypes);
+        if (boundedTypeReplaced == null) {
+            throw new RuntimeException();
+        }
+        if (boundedTypeReplaced != boundedType) {
+            return new ResolvedWildcard(type, boundedTypeReplaced);
+        } else {
+            return this;
+        }
+    }
+
+    @Override
+    public boolean mention(List<ResolvedTypeParameterDeclaration> typeParameters) {
+        return boundedType != null && boundedType.mention(typeParameters);
+    }
+
+    public boolean isUpperBounded() {
+        return isSuper();
+    }
+
+    public boolean isLowerBounded() {
+        return isExtends();
+    }
+
+    public enum BoundType {
+        SUPER,
+        EXTENDS
+    }
+
+}