Create rule S6745(java): Detection of the Local Butterfly object dependencies anti-pattern (#3007)

rules/S6745/java/metadata.json

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+{
+  "title": "Detection of the Local Butterfly object dependencies anti-pattern",
+  "type": "CODE_SMELL",
+  "status": "ready",
+  "remediation": {
+    "func": "Constant\/Issue",
+    "constantCost": "5min"
+  },
+  "tags": [
+  ],
+  "defaultSeverity": "Info",
+  "ruleSpecification": "RSPEC-6745",
+  "sqKey": "S6745",
+  "scope": "All",
+  "defaultQualityProfiles": ["Sonar way"],
+  "quickfix": "infeasible",
+  "code": {
+    "impacts": {
+      "MAINTAINABILITY": "LOW",
+      "RELIABILITY": "LOW",
+      "SECURITY": "LOW"
+    },
+    "attribute": "CONVENTIONAL"
+  }
+}

rules/S6745/java/rule.adoc

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+Local Butterfly is a structural anti-pattern for a component with many immediate dependents.
+The scope of dependents is limited to immediate dependents that directly access, use, reference, or contain the Local Butterfly.
+
+These issues arise from the tight coupling between the component and its dependents, which can lead to a lack of flexibility, maintainability, and scalability in the system.
+
+== Why is this an issue?
+
+Any changes or modifications to the component with a large number of immediate dependents may require updates in multiple places.
+This can make it challenging to introduce new features or make changes without impacting the entire system.
+The lack of flexibility can hinder adapting to evolving requirements or business needs.
+
+The tight coupling between the component and its immediate dependents can make the codebase more complex and harder to understand.
+This can lead to difficulties in maintaining and debugging the system.
+When a change is required, it may be challenging to identify all the affected areas, increasing the risk of introducing bugs or unintended side effects.
+
+As the number of immediate dependents increases, the component's scalability can be compromised.
+
+Only basic Interfaces or utility classes should be allowed to become Local Butterflies.
+
+== How to fix it
+
+To mitigate these issues, it is recommended to consider alternative design patterns that promote loose coupling and separation of concerns.
+By decoupling the component from its immediate dependents, such as using interfaces or abstractions, it becomes easier to modify, maintain, and test the system.
+This promotes better flexibility, maintainability, and scalability in the long run.
+

rules/S6745/metadata.json

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+{
+}