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Date Handlers #11

Merged
merged 1 commit into from
Jan 15, 2025
Merged

Date Handlers #11

merged 1 commit into from
Jan 15, 2025

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bageshwar
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@bageshwar bageshwar commented Jan 15, 2025

Fixes #8

Summary by CodeRabbit

  • Documentation

    • Enhanced documentation for the Handler concept in README.md
    • Added detailed documentation about handlers in Handlers.md
  • New Features

    • Added support for Date type handling in serialization and deserialization
    • Introduced DateHandler for managing Date object conversions
  • Tests

    • Updated test cases to include new Date field in ClassWithReferences
    • Simplified object equality assertions in test methods

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coderabbitai bot commented Jan 15, 2025

Walkthrough

The pull request introduces support for handling Date objects in the Pibify library. A new DateHandler class is added to the com.flipkart.pibify.codegen.stub package, which provides serialization and deserialization capabilities for Date objects. The AbstractPibifyHandlerCache is updated to include the DateHandler for Date class mapping. Corresponding test classes are modified to validate the new functionality, including adding a date field to the ClassWithReferences test class and updating test methods to accommodate this new field.

Changes

File Change Summary
Handlers.md Introduced documentation for Handler concept, custom handler creation, and out-of-the-box handlers
README.md Added reference to Handlers.md for more details about Handlers
pibify-core/.../AbstractPibifyHandlerCache.java Added import for java.util.Date and registered DateHandler for Date class
pibify-core/.../DateHandler.java New class added to handle serialization and deserialization of Date objects
pibify-maven-plugin/.../BeanIntrospectorBasedCodeGenSpecCreatorTest.java Updated test to verify date field in CodeGenSpec
pibify-maven-plugin/.../CodeGeneratorImplTest.java Simplified object equality assertion
pibify-maven-plugin/.../ClassWithReferences.java Added date field, getter, setter, and updated equals and hashCode methods

Assessment against linked issues

Objective Addressed Explanation
Support for Date Handler out of the box

Poem

🐰 A rabbit's tale of dates so bright,
Serialized with CodeRabbit's might!
From epoch to bytes, we dance and play,
Handlers transform in a magical way 🕰️
Pibify's magic, oh so neat! 🎩

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Actionable comments posted: 3

🧹 Nitpick comments (7)
pibify-maven-plugin/src/test/java/com/flipkart/pibify/test/data/ClassWithReferences.java (2)

40-41: Add documentation for the date field.

Consider adding a Javadoc comment to describe the purpose and format of the date field.

+    /**
+     * The date field to store timestamp information.
+     */
     @Pibify(3)
     private Date date;

45-45: Consider using a fixed timestamp for testing.

Using System.currentTimeMillis() makes tests non-deterministic. Consider using a fixed timestamp for consistent test results.

-        date = new Date(System.currentTimeMillis());
+        date = new Date(1704067200000L); // 2025-01-01 00:00:00 UTC
pibify-core/src/main/java/com/flipkart/pibify/codegen/stub/DateHandler.java (2)

28-33: Enhance class documentation.

The current documentation is minimal. Consider adding more details about the serialization format and usage.

 /**
- * This class is used for serde of Date
+ * Handler for serializing and deserializing java.util.Date objects.
+ * 
+ * Serialization format:
+ * - Writes the date as milliseconds since epoch using tag 1
+ * - Deserialization reads the milliseconds using tag 8
+ * 
+ * Usage:
+ * This handler is automatically registered in AbstractPibifyHandlerCache
+ * for handling Date fields annotated with @Pibify
+ *
  * Author bageshwar.pn
  * Date 15/01/25
  */

46-65: Simplify deserialization logic.

The current implementation can be simplified using early returns and removing unnecessary variables.

     @Override
     public Date deserialize(IDeserializer deserializer, Class<Date> type, SerializationContext context) throws PibifyCodeExecException {
         try {
-            int tag = deserializer.getNextTag();
-            Date date = null;
-            while (tag != 0 && tag != PibifyGenerated.getEndObjectTag()) {
-                switch (tag) {
-                    case 8:
-                        date = new Date(deserializer.readLong());
-                        break;
-                    default:
-                        break;
-                }
-                tag = deserializer.getNextTag();
+            while (true) {
+                int tag = deserializer.getNextTag();
+                if (tag == 0 || tag == PibifyGenerated.getEndObjectTag()) {
+                    return null;
+                }
+                if (tag == 8) {
+                    return new Date(deserializer.readLong());
+                }
             }
-            return date;
         } catch (IOException e) {
             throw new PibifyCodeExecException(e);
         }
     }
Handlers.md (3)

1-11: LGTM! Consider adding return type documentation.

The Handler concept is well explained. Consider adding documentation for the return types and possible exceptions.

 public abstract T deserialize(IDeserializer deserializer, Class<T> type, SerializationContext context)
-        throws PibifyCodeExecException;
+        throws PibifyCodeExecException;  // Throws when deserialization fails
+        // Returns: Deserialized object of type T

 public abstract void serialize(T object, ISerializer serializer, SerializationContext context)
-        throws PibifyCodeExecException;
+        throws PibifyCodeExecException;  // Throws when serialization fails

18-27: LGTM! Consider adding handler examples.

The out-of-the-box handlers section is clear. Consider adding simple usage examples for each handler type.


35-43: Add error handling in the example.

The custom handler example should demonstrate proper error handling.

 public class CustomHandlerCache extends AbstractPibifyHandlerCache {
     public CustomHandlerCache() {
         super();
-        // Type is the class type of the object
-        super.mapBuilder.put(type, new CustomHandler());
+        try {
+            // Type is the class type of the object
+            super.mapBuilder.put(type, new CustomHandler());
+        } catch (Exception e) {
+            throw new IllegalStateException("Failed to register custom handler", e);
+        }
     }
 }
📜 Review details

Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 2dd4472 and fd39b59.

📒 Files selected for processing (7)
  • Handlers.md (1 hunks)
  • README.md (1 hunks)
  • pibify-core/src/main/java/com/flipkart/pibify/codegen/stub/AbstractPibifyHandlerCache.java (2 hunks)
  • pibify-core/src/main/java/com/flipkart/pibify/codegen/stub/DateHandler.java (1 hunks)
  • pibify-maven-plugin/src/test/java/com/flipkart/pibify/codegen/BeanIntrospectorBasedCodeGenSpecCreatorTest.java (1 hunks)
  • pibify-maven-plugin/src/test/java/com/flipkart/pibify/codegen/CodeGeneratorImplTest.java (1 hunks)
  • pibify-maven-plugin/src/test/java/com/flipkart/pibify/test/data/ClassWithReferences.java (3 hunks)
👮 Files not reviewed due to content moderation or server errors (2)
  • pibify-maven-plugin/src/test/java/com/flipkart/pibify/codegen/CodeGeneratorImplTest.java
  • README.md
🧰 Additional context used
🪛 LanguageTool
Handlers.md

[misspelling] ~30-~30: This word is normally spelled as one.
Context: ...tected constructor. #### Adding custom hand-written handlers If you want to add custom han...

(EN_COMPOUNDS_HAND_WRITTEN)

🔇 Additional comments (7)
pibify-maven-plugin/src/test/java/com/flipkart/pibify/test/data/ClassWithReferences.java (3)

24-24: LGTM!

The import statement for java.util.Date is correctly placed.


77-79: LGTM!

The equals method correctly includes the date field in the comparison using Objects.equals().


84-84: LGTM!

The hashCode method correctly includes the date field using Objects.hash().

pibify-core/src/main/java/com/flipkart/pibify/codegen/stub/AbstractPibifyHandlerCache.java (2)

27-27: LGTM!

The import statement for java.util.Date is correctly placed.


79-79: LGTM!

The DateHandler is correctly registered alongside other built-in type handlers.

pibify-maven-plugin/src/test/java/com/flipkart/pibify/codegen/BeanIntrospectorBasedCodeGenSpecCreatorTest.java (2)

327-327: LGTM!

The field count assertion is correctly updated to include the new date field.


332-341: LGTM!

The assertions comprehensively verify all aspects of the date field:

  • Field name and index
  • Getter and setter methods
  • Data type and reference type

Comment on lines +71 to +73
public void setDate(Date date) {
this.date = date;
}
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🛠️ Refactor suggestion

Implement defensive copying in the setter.

Setting the Date object directly makes the class vulnerable to external modifications. Consider using a defensive copy.

     public void setDate(Date date) {
-        this.date = date;
+        this.date = date != null ? new Date(date.getTime()) : null;
     }
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
public void setDate(Date date) {
this.date = date;
}
public void setDate(Date date) {
this.date = date != null ? new Date(date.getTime()) : null;
}

Comment on lines +67 to +69
public Date getDate() {
return date;
}
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🛠️ Refactor suggestion

Implement defensive copying in the getter.

Returning the Date object directly allows callers to modify its state. Consider returning a defensive copy.

     public Date getDate() {
-        return date;
+        return date != null ? new Date(date.getTime()) : null;
     }
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
public Date getDate() {
return date;
}
public Date getDate() {
return date != null ? new Date(date.getTime()) : null;
}

Comment on lines +35 to +44
@Override
public void serialize(Date object, ISerializer serializer, SerializationContext context) throws PibifyCodeExecException {
if (object != null) {
try {
serializer.writeLong(1, object.getTime());
} catch (IOException e) {
throw new RuntimeException(e);
}
}
}
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⚠️ Potential issue

Fix tag inconsistency and improve error handling.

The code has the following issues:

  1. Uses different tags for serialization (1) and deserialization (8).
  2. Wraps IOException in RuntimeException instead of PibifyCodeExecException.
     @Override
     public void serialize(Date object, ISerializer serializer, SerializationContext context) throws PibifyCodeExecException {
         if (object != null) {
             try {
-                serializer.writeLong(1, object.getTime());
+                serializer.writeLong(8, object.getTime());
             } catch (IOException e) {
-                throw new RuntimeException(e);
+                throw new PibifyCodeExecException(e);
             }
         }
     }
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
@Override
public void serialize(Date object, ISerializer serializer, SerializationContext context) throws PibifyCodeExecException {
if (object != null) {
try {
serializer.writeLong(1, object.getTime());
} catch (IOException e) {
throw new RuntimeException(e);
}
}
}
@Override
public void serialize(Date object, ISerializer serializer, SerializationContext context) throws PibifyCodeExecException {
if (object != null) {
try {
serializer.writeLong(8, object.getTime());
} catch (IOException e) {
throw new PibifyCodeExecException(e);
}
}
}

coderabbitai bot added a commit that referenced this pull request Jan 15, 2025
Docstrings generation was requested by @bageshwar.

* #11 (comment)

The following files were modified:

* `pibify-core/src/main/java/com/flipkart/pibify/codegen/stub/AbstractPibifyHandlerCache.java`
* `pibify-core/src/main/java/com/flipkart/pibify/codegen/stub/DateHandler.java`
* `pibify-maven-plugin/src/test/java/com/flipkart/pibify/codegen/BeanIntrospectorBasedCodeGenSpecCreatorTest.java`
* `pibify-maven-plugin/src/test/java/com/flipkart/pibify/codegen/CodeGeneratorImplTest.java`
* `pibify-maven-plugin/src/test/java/com/flipkart/pibify/test/data/ClassWithReferences.java`
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coderabbitai bot commented Jan 15, 2025

Note

We have generated docstrings for this pull request, at #12

@bageshwar bageshwar merged commit 0b9c56d into main Jan 15, 2025
2 checks passed
@bageshwar bageshwar deleted the date-handler branch January 15, 2025 17:18
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Support for Date Handler
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