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2026-11-06 21:43:25 +05:30
parent dfd3a830cd
commit d7d5689f05
40 changed files with 1359 additions and 0 deletions
@@ -0,0 +1,14 @@
+-- retention: annotations reflection can see on Base
+[@com.ankurm.demo.annotations.Tracked(priority=5, value="", level=NORMAL, tags={})]
+-- members and defaults
+default  value="" priority=5 level=NORMAL tags=[]
+explicit value="billing" priority=9 level=HIGH tags=[pci, money]
+-- @Inherited: Child extends Base, Child itself has no annotations
+getAnnotation(Tracked)         = true
+getDeclaredAnnotation(Tracked) = false
+-- @Repeatable
+Staff direct getAnnotations().length   = 1 (Roles container)
+Staff getAnnotationsByType(Role)       = [admin, auditor]
+Solo  getAnnotation(Role) != null      = true
+Solo  getAnnotation(Roles) != null     = false
+Solo  getAnnotationsByType(Role)       = [admin]
@@ -0,0 +1,2 @@
+[]
+[email: must not be blank, name: name is required]
@@ -0,0 +1,6 @@
+javap -v -p -cp demo/target/classes com.ankurm.demo.RetentionDemo$Base  (filtered)
+RuntimeVisibleAnnotations:
+    com.ankurm.demo.annotations.Tracked
+RuntimeInvisibleAnnotations:
+    com.ankurm.demo.annotations.ClassOnly
+occurrences of SourceOnly in the class file: 0
@@ -0,0 +1,35 @@
+package com.ankurm.demo;
+
+// Generated by com.ankurm.builder.BuilderProcessor - do not edit.
+public final class PersonBuilder {
+
+    private java.lang.String name;
+    private int age;
+    private java.util.List<java.lang.String> nicknames;
+
+    public PersonBuilder name(java.lang.String name) {
+        this.name = name;
+        return this;
+    }
+
+    public PersonBuilder age(int age) {
+        this.age = age;
+        return this;
+    }
+
+    public PersonBuilder nicknames(java.util.List<java.lang.String> nicknames) {
+        this.nicknames = nicknames;
+        return this;
+    }
+
+    public PersonBuilder addToNicknames(java.lang.String element) {
+        java.util.List<java.lang.String> copy = this.nicknames == null ? new java.util.ArrayList<>() : new java.util.ArrayList<>(this.nicknames);
+        copy.add(element);
+        this.nicknames = copy;
+        return this;
+    }
+
+    public com.ankurm.demo.Person build() {
+        return new com.ankurm.demo.Person(name, age, nicknames);
+    }
+}
@@ -0,0 +1,3 @@
+Person[name=Asha, age=34, nicknames=[Ash, A]]
+Pizza[size=large, extraCheese=true, toppings=[olives]]
+Person[name=null, age=0, nicknames=null]
@@ -0,0 +1,6 @@
+$ javac -processorpath processor/target/classes -d <tmp> bad/Shape.java
+bad/Shape.java:5: error: @GenerateBuilder can only be applied to a class or a record, not to interface
+public interface Shape {
+       ^
+1 error
+exit=1
@@ -0,0 +1,30 @@
+$ javac -version
+javac 25.0.5
+
+$ javac -cp processor/target/classes -d <tmp> Person.java Pizza.java BuilderUsageDemo.java
+demo/src/main/java/com/ankurm/demo/BuilderUsageDemo.java:6: error: cannot find symbol
+        Person p = new PersonBuilder()
+                       ^
+  symbol:   class PersonBuilder
+  location: class BuilderUsageDemo
+demo/src/main/java/com/ankurm/demo/BuilderUsageDemo.java:14: error: cannot find symbol
+        Pizza pizza = new PizzaMaker()
+                          ^
+  symbol:   class PizzaMaker
+  location: class BuilderUsageDemo
+demo/src/main/java/com/ankurm/demo/BuilderUsageDemo.java:22: error: cannot find symbol
+        System.out.println(new PersonBuilder().build());
+                               ^
+  symbol:   class PersonBuilder
+  location: class BuilderUsageDemo
+3 errors
+exit=1
+
+$ javac -Xlint:all -cp processor/target/classes -d <tmp> Person.java
+exit=0  (no output at all: nothing warned that a processor was skipped)
+
+$ javac -cp processor/target/classes -proc:full -d <tmp> Person.java Pizza.java BuilderUsageDemo.java
+exit=0
+
+$ javac -cp processor/target/classes -processorpath processor/target/classes -d <tmp> Person.java Pizza.java BuilderUsageDemo.java
+exit=0
@@ -0,0 +1,13 @@
+$ mvn -B clean compile -Pclasspath-only        # no annotationProcessorPaths
+[INFO] Compiling 2 source files with javac [debug release 25] to target/classes
+[INFO] Compiling 12 source files with javac [debug release 25] to target/classes
+[ERROR] COMPILATION ERROR : 
+[ERROR] demo/src/main/java/com/ankurm/demo/BuilderUsageDemo.java:[6,24] cannot find symbol
+[ERROR] demo/src/main/java/com/ankurm/demo/BuilderUsageDemo.java:[14,27] cannot find symbol
+[ERROR] demo/src/main/java/com/ankurm/demo/BuilderUsageDemo.java:[22,32] cannot find symbol
+[INFO] BUILD FAILURE
+
+$ mvn -B clean compile -Pclasspath-proc-full   # same, plus <proc>full</proc>
+[INFO] Compiling 2 source files with javac [debug release 25] to target/classes
+[INFO] Compiling 12 source files with javac [debug release 25] to target/classes
+[INFO] BUILD SUCCESS
@@ -0,0 +1,26 @@
+== 1. in-memory compile: Person + Main, BuilderProcessor supplied directly
+success=true generated=[com.acme.PersonBuilder]
+classes=[com.acme.Main, com.acme.Person, com.acme.PersonBuilder]
+
+== 2. error cases: javac diagnostics produced via Messager
+interface -> ERROR /com/acme/Shape.java:4: @GenerateBuilder can only be applied to a class or a record, not to interface
+abstract class -> ERROR /com/acme/Animal.java:4: @GenerateBuilder cannot be applied to abstract class Animal
+two constructors -> ERROR /com/acme/Point.java:4: Point must have exactly one non-private constructor, but has 2
+generic class -> ERROR /com/acme/Box.java:4: @GenerateBuilder does not support generic types such as Box
+
+== 3. rounds, with -Abuilder.debug=true
+builder round 1: annotations=[com.ankurm.builder.GenerateBuilder] roots=[com.acme.Person] processingOver=false
+builder round 2: annotations=[] roots=[com.acme.PersonBuilder] processingOver=false
+builder round 3: annotations=[] roots=[] processingOver=true
+
+== 4. no setProcessors(): discovered through META-INF/services via -processorpath
+success=true generated=[com.acme.PersonBuilder]
+
+== 5. -proc:none: the processor never runs
+success=false generated=[]
+ERROR /com/acme/Main.java:5: cannot find symbol
+
+== 6. a processor that forgot @SupportedSourceVersion
+WARNING: No SupportedSourceVersion annotation found on com.ankurm.builder.LazyProcessor, returning RELEASE_6.
+WARNING: Supported source version 'RELEASE_6' from annotation processor 'com.ankurm.builder.LazyProcessor' less than -source '25'
+
@@ -0,0 +1,15 @@
+-------------------------------------------------------------------------------
+Test set: com.ankurm.builder.ProcessorCompileTest
+-------------------------------------------------------------------------------
+Tests run: 6, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 4.268 s -- in com.ankurm.builder.ProcessorCompileTest
+
+-------------------------------------------------------------------------------
+Test set: com.ankurm.demo.GeneratedBuilderTest
+-------------------------------------------------------------------------------
+Tests run: 5, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.131 s -- in com.ankurm.demo.GeneratedBuilderTest
+
+-------------------------------------------------------------------------------
+Test set: com.ankurm.demo.RetentionReflectionTest
+-------------------------------------------------------------------------------
+Tests run: 5, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.351 s -- in com.ankurm.demo.RetentionReflectionTest
+
@@ -0,0 +1,6 @@
+$ javac -cp demo/target/classes -d <tmp> bad/WrongTarget.java
+bad/WrongTarget.java:4: error: annotation interface not applicable to this kind of declaration
+@NotBlank
+^
+1 error
+exit=1