From ef0ae6b61df0d9911247c69368b42e27a62b878b Mon Sep 17 00:00:00 2001
From: Pekka Helenius <fincer89@hotmail.com>
Date: Sun, 13 Sep 2020 23:48:56 +0300
Subject: [PATCH] Implement CurrentYear validator

Signed-off-by: Pekka Helenius <fincer89@hotmail.com>
---
 .../bookstore/validation/CurrentYear.java     | 24 ++++++++++++++++++
 .../validation/CurrentYearValidator.java      | 25 +++++++++++++++++++
 2 files changed, 49 insertions(+)
 create mode 100644 bookstore/src/main/java/com/fjordtek/bookstore/validation/CurrentYear.java
 create mode 100644 bookstore/src/main/java/com/fjordtek/bookstore/validation/CurrentYearValidator.java

diff --git a/bookstore/src/main/java/com/fjordtek/bookstore/validation/CurrentYear.java b/bookstore/src/main/java/com/fjordtek/bookstore/validation/CurrentYear.java
new file mode 100644
index 0000000..04a7c6b
--- /dev/null
+++ b/bookstore/src/main/java/com/fjordtek/bookstore/validation/CurrentYear.java
@@ -0,0 +1,24 @@
+//Pekka Helenius <fincer89@hotmail.com>, Fjordtek 2020
+
+package com.fjordtek.bookstore.validation;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import java.lang.annotation.ElementType;
+
+import javax.validation.Constraint;
+import javax.validation.Payload;
+
+@Documented
+@Constraint(validatedBy = CurrentYearValidator.class)
+@Target(value={ElementType.TYPE_USE, ElementType.ANNOTATION_TYPE, ElementType.CONSTRUCTOR, ElementType.FIELD, ElementType.METHOD, ElementType.PARAMETER})
+@Retention(RetentionPolicy.RUNTIME)
+
+public @interface CurrentYear {
+	String message() default "Year must not be in the future";
+	Class<?>[] groups() default { };
+	Class<? extends Payload>[] payload() default { };
+
+}
\ No newline at end of file
diff --git a/bookstore/src/main/java/com/fjordtek/bookstore/validation/CurrentYearValidator.java b/bookstore/src/main/java/com/fjordtek/bookstore/validation/CurrentYearValidator.java
new file mode 100644
index 0000000..0b5a76e
--- /dev/null
+++ b/bookstore/src/main/java/com/fjordtek/bookstore/validation/CurrentYearValidator.java
@@ -0,0 +1,25 @@
+//Pekka Helenius <fincer89@hotmail.com>, Fjordtek 2020
+
+package com.fjordtek.bookstore.validation;
+
+import java.time.Year;
+
+import javax.validation.ConstraintValidator;
+import javax.validation.ConstraintValidatorContext;
+
+import org.springframework.stereotype.Component;
+
+@Component
+public class CurrentYearValidator implements ConstraintValidator<CurrentYear, Integer> {
+	
+	private static final int yearNow = Year.now().getValue();
+	
+	@Override
+    public void initialize(CurrentYear year) {
+    }
+	
+	@Override
+	public boolean isValid(Integer year, ConstraintValidatorContext constraintValidatorContext) {
+		return year <= yearNow;
+	}
+}
\ No newline at end of file