issue878: add a check in all setters

1 files changed, 3 insertions, 0 deletions

diff --git a/javaparser-core-generators/src/main/java/com/github/javaparser/generator/core/node/PropertyGenerator.java b/javaparser-core-generators/src/main/java/com/github/javaparser/generator/core/node/PropertyGenerator.java
index 6f139556b..4ceb6d7b1 100644
--- a/javaparser-core-generators/src/main/java/com/github/javaparser/generator/core/node/PropertyGenerator.java
+++ b/javaparser-core-generators/src/main/java/com/github/javaparser/generator/core/node/PropertyGenerator.java
@@ -60,6 +60,7 @@ public class PropertyGenerator extends NodeGenerator {
 
         final BlockStmt body = setter.getBody().get();
         body.getStatements().clear();
+
         if (property.isRequired()) {
             Class<?> type = property.getType();
             if (property.isNonEmpty() && property.isSingular()) {
@@ -68,6 +69,8 @@ public class PropertyGenerator extends NodeGenerator {
                 body.addStatement(f("assertNotNull(%s);", name));
             }
         }
+        body.addStatement(f("if (%s == this.%s) { return (%s) this; }", name, name, setter.getType()));
+
         body.addStatement(f("notifyPropertyChange(ObservableProperty.%s, this.%s, %s);", observableName, name, name));
         if (property.isNode()) {
             body.addStatement(f("if (this.%s != null) this.%s.setParentNode(null);", name, name));