1 files changed, 79 insertions, 0 deletions
diff --git a/javaparser-core/src/main/java/com/github/javaparser/resolution/types/ResolvedUnionType.java b/javaparser-core/src/main/java/com/github/javaparser/resolution/types/ResolvedUnionType.java
new file mode 100644
index 000000000..bd5361ac9
--- /dev/null
+++ b/javaparser-core/src/main/java/com/github/javaparser/resolution/types/ResolvedUnionType.java
@@ -0,0 +1,79 @@
+/*
+ * 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 java.util.Collection;
+import java.util.HashSet;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.stream.Collectors;
+
+/**
+ * A union type is defined in java as list of types separates by pipes.
+ *
+ * @author Federico Tomassetti
+ */
+public class ResolvedUnionType implements ResolvedType {
+    private List<ResolvedType> elements;
+
+    public ResolvedUnionType(List<ResolvedType> elements) {
+        if (elements.size() < 2) {
+            throw new IllegalArgumentException("An union type should have at least two elements. This has " + elements.size());
+        }
+        this.elements = new LinkedList<>(elements);
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        ResolvedUnionType that = (ResolvedUnionType) o;
+
+        return new HashSet<>(elements).equals(new HashSet<>(that.elements));
+    }
+
+    @Override
+    public int hashCode() {
+        return new HashSet<>(elements).hashCode();
+    }
+
+    @Override
+    public String describe() {
+        return String.join(" | ", elements.stream().map(ResolvedType::describe).collect(Collectors.toList()));
+    }
+
+    @Override
+    public boolean isAssignableBy(ResolvedType other) {
+        return elements.stream().allMatch(e -> e.isAssignableBy(other));
+    }
+
+    @Override
+    public boolean isUnionType() {
+        return true;
+    }
+
+    @Override
+    public ResolvedUnionType asUnionType() {
+        return this;
+    }
+}