Fix entity becoming a bean

inject-java/src/main/java/io/micronaut/annotation/processing/BeanDefinitionInjectProcessor.java

@@ -961,7 +961,7 @@ public Object visitExecutable(ExecutableElement method, Object o) {
                         writer.setValidated(validatedMethod);
                     }
                 }
-            } else if (validatedMethod) {
+            } else if (validatedMethod && isDeclaredBean) {
                 if (isPrivate) {
                     error(method, "Method annotated with constraints but is declared private. Change the method to be non-private in order for AOP advice to be applied.");
                     return null;

inject-java/src/test/groovy/io/micronaut/inject/validation/Account1.java

@@ -0,0 +1,43 @@
+package io.micronaut.inject.validation;
+
+import javax.annotation.Nullable;
+import javax.persistence.Entity;
+import javax.validation.constraints.NotBlank;
+
+@Entity
+public class Account1 {
+
+    private Long id;
+
+    @Nullable
+    @NotBlank
+    private String username;
+
+    @Nullable
+    @NotBlank
+    private String password;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getUsername() {
+        return username;
+    }
+
+    public void setUsername(String username) {
+        this.username = username;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+
+    public void setPassword(String password) {
+        this.password = password;
+    }
+}

inject-java/src/test/groovy/io/micronaut/inject/validation/Account2.java

@@ -0,0 +1,39 @@
+package io.micronaut.inject.validation;
+
+import javax.persistence.Entity;
+import javax.validation.constraints.NotBlank;
+
+@Entity
+public class Account2 {
+
+    private Long id;
+
+    private String username;
+
+    private String password;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    @NotBlank
+    public String getUsername() {
+        return username;
+    }
+
+    public void setUsername(String username) {
+        this.username = username;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+
+    public void setPassword(String password) {
+        this.password = password;
+    }
+}

inject-java/src/test/groovy/io/micronaut/inject/validation/Account3.java

@@ -0,0 +1,41 @@
+package io.micronaut.inject.validation;
+
+import javax.annotation.Nullable;
+import javax.persistence.Entity;
+import javax.validation.constraints.NotBlank;
+
+@Entity
+@Nullable
+public class Account3 {
+
+    private Long id;
+
+    private String username;
+
+    private String password;
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    @NotBlank
+    public String getUsername() {
+        return username;
+    }
+
+    public void setUsername(String username) {
+        this.username = username;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+
+    public void setPassword(String password) {
+        this.password = password;
+    }
+}

inject-java/src/test/groovy/io/micronaut/inject/validation/BeanWithValidationSpec.groovy

@@ -0,0 +1,18 @@
+package io.micronaut.inject.validation
+
+import io.micronaut.context.ApplicationContext
+import spock.lang.AutoCleanup
+import spock.lang.Shared
+import spock.lang.Specification
+
+class BeanWithValidationSpec extends Specification {
+
+    @Shared @AutoCleanup ApplicationContext context = ApplicationContext.run()
+
+    void 'test bean definition is not created for a bean with validation'() {
+        expect:
+            context.getBeanDefinitions(Account1.class).isEmpty()
+            context.getBeanDefinitions(Account2.class).isEmpty()
+            context.getBeanDefinitions(Account3.class).isEmpty()
+    }
+}