Use node streams in ASTUnion/Intersection types

pmd-java/src/main/java/net/sourceforge/pmd/lang/java/ast/ASTIntersectionType.java

@@ -5,7 +5,8 @@
 package net.sourceforge.pmd.lang.java.ast;
 
 import java.util.Iterator;
-import java.util.List;
+
+import net.sourceforge.pmd.lang.ast.NodeStream;
 
 
 /**
@@ -42,11 +43,9 @@ public final class ASTIntersectionType extends AbstractJavaTypeNode
 
     }
 
-    /**
-     * Returns the list of component types.
-     */
-    public List<ASTClassOrInterfaceType> getComponents() {
-        return children(ASTClassOrInterfaceType.class).toList();
+    /** Returns a stream of component types. */
+    public NodeStream<ASTClassOrInterfaceType> getComponents() {
+        return children(ASTClassOrInterfaceType.class);
     }
 
 

pmd-java/src/main/java/net/sourceforge/pmd/lang/java/ast/ASTUnionType.java

@@ -5,9 +5,9 @@
 package net.sourceforge.pmd.lang.java.ast;
 
 import java.util.Iterator;
-import java.util.List;
 import java.util.stream.Collectors;
 
+import net.sourceforge.pmd.lang.ast.NodeStream;
 import net.sourceforge.pmd.lang.java.ast.InternalInterfaces.AtLeastOneChildOfType;
 
 
@@ -45,11 +45,9 @@ public final class ASTUnionType extends AbstractJavaTypeNode
         return visitor.visit(this, data);
     }
 
-    /**
-     * Returns the list of component types.
-     */
-    public List<ASTClassOrInterfaceType> getComponents() {
-        return children(ASTClassOrInterfaceType.class).toList();
+    /** Returns a stream of component types. */
+    public NodeStream<ASTClassOrInterfaceType> getComponents() {
+        return children(ASTClassOrInterfaceType.class);
     }
 
     @Override