Ensure non-null checks in constructor arguments

Author: nakamura-to

doma-processor/src/main/java/org/seasar/doma/internal/apt/ProcessingContext.java

@@ -15,6 +15,7 @@
  */
 package org.seasar.doma.internal.apt;
 
+import java.util.Objects;
 import javax.annotation.processing.ProcessingEnvironment;
 
 public class ProcessingContext {
@@ -29,7 +30,7 @@ public class ProcessingContext {
   private Resources resources;
 
   public ProcessingContext(ProcessingEnvironment env) {
-    this.env = env;
+    this.env = Objects.requireNonNull(env);
   }
 
   public void init() {

doma-processor/src/main/java/org/seasar/doma/internal/apt/annot/Annotations.java

@@ -20,6 +20,7 @@
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
+import java.util.Objects;
 import java.util.function.BiFunction;
 import java.util.function.Function;
 import java.util.stream.Collectors;
@@ -68,7 +69,7 @@ public class Annotations {
   private final RoundContext ctx;
 
   public Annotations(RoundContext ctx) {
-    this.ctx = ctx;
+    this.ctx = Objects.requireNonNull(ctx);
   }
 
   public AggregateStrategyAnnot newAggregateStrategyAnnot(TypeElement typeElement) {

doma-processor/src/main/java/org/seasar/doma/internal/apt/cttype/CtTypes.java

@@ -122,7 +122,7 @@ public class CtTypes {
   private final RoundContext ctx;
 
   public CtTypes(RoundContext ctx) {
-    this.ctx = ctx;
+    this.ctx = Objects.requireNonNull(ctx);
   }
 
   public AggregateStrategyCtType newAggregateStrategyCtType(TypeMirror type) {