1 files changed, 83 insertions, 0 deletions
diff --git a/javaparser-core/src/main/java/com/github/javaparser/ast/nodeTypes/NodeWithTypeArguments.java b/javaparser-core/src/main/java/com/github/javaparser/ast/nodeTypes/NodeWithTypeArguments.java
new file mode 100644
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+++ b/javaparser-core/src/main/java/com/github/javaparser/ast/nodeTypes/NodeWithTypeArguments.java
@@ -0,0 +1,83 @@
+/*
+ * 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.ast.nodeTypes;
+
+import com.github.javaparser.ast.Node;
+import com.github.javaparser.ast.NodeList;
+import com.github.javaparser.ast.type.Type;
+import com.github.javaparser.metamodel.DerivedProperty;
+
+import java.util.Optional;
+
+import static com.github.javaparser.ast.NodeList.nodeList;
+
+/**
+ * A node that can have type arguments.
+ * <p>
+ * <pre>
+ *     new X();        --> typeArguments == Optional is empty
+ *     new X&lt;>();      --> typeArguments = [], diamondOperator = true
+ *     new X&lt;C,D>();   --> typeArguments = [C,D], diamondOperator = false
+ * </pre>
+ */
+public interface NodeWithTypeArguments<N extends Node> {
+    /**
+     * @return the types that can be found in the type arguments: &lt;String, Integer&gt;.
+     */
+    Optional<NodeList<Type>> getTypeArguments();
+
+    /**
+     * Allows you to set the generic arguments
+     *
+     * @param typeArguments The list of types of the generics, can be null
+     */
+    N setTypeArguments(NodeList<Type> typeArguments);
+
+    /**
+     * @return whether the type arguments look like &lt;>.
+     */
+    @DerivedProperty
+    default boolean isUsingDiamondOperator() {
+        return getTypeArguments().isPresent() && getTypeArguments().get().isEmpty();
+    }
+
+    /**
+     * Sets the type arguments to &lt>.
+     */
+    @SuppressWarnings("unchecked")
+    default N setDiamondOperator() {
+        return setTypeArguments(new NodeList<>());
+    }
+
+    /**
+     * Removes all type arguments, including the surrounding &lt;>.
+     */
+    @SuppressWarnings("unchecked")
+    default N removeTypeArguments() {
+        return setTypeArguments((NodeList<Type>) null);
+    }
+
+    @SuppressWarnings("unchecked")
+    default N setTypeArguments(Type... typeArguments) {
+        return setTypeArguments(nodeList(typeArguments));
+    }
+}