SONARJAVA-7236 Mark the optional pattern type as nullable

Author: rombirli

java-frontend/src/main/java/org/sonar/java/model/pattern/DefaultPatternTreeImpl.java

@@ -18,6 +18,7 @@
 
 import java.util.Collections;
 import java.util.List;
+import javax.annotation.Nullable;
 import org.sonar.plugins.java.api.semantic.Type;
 import org.sonar.plugins.java.api.tree.DefaultPatternTree;
 import org.sonar.plugins.java.api.tree.SyntaxToken;
@@ -35,7 +36,7 @@ public DefaultPatternTreeImpl(SyntaxToken defaultToken) {
     this(defaultToken, null);
   }
 
-  public DefaultPatternTreeImpl(SyntaxToken defaultToken, Type type) {
+  public DefaultPatternTreeImpl(SyntaxToken defaultToken, @Nullable Type type) {
     super(Tree.Kind.DEFAULT_PATTERN);
     this.defaultToken = defaultToken;
     this.type = type;

java-frontend/src/main/java/org/sonar/java/model/pattern/GuardedPatternTreeImpl.java

@@ -18,6 +18,7 @@
 
 import java.util.Arrays;
 import java.util.List;
+import javax.annotation.Nullable;
 import org.sonar.plugins.java.api.semantic.Type;
 import org.sonar.plugins.java.api.tree.ExpressionTree;
 import org.sonar.plugins.java.api.tree.GuardedPatternTree;
@@ -39,7 +40,7 @@ public GuardedPatternTreeImpl(PatternTree pattern, SyntaxToken whenOperator, Exp
     this(pattern, whenOperator, expression, null);
   }
 
-  public GuardedPatternTreeImpl(PatternTree pattern, SyntaxToken whenOperator, ExpressionTree expression, Type type) {
+  public GuardedPatternTreeImpl(PatternTree pattern, SyntaxToken whenOperator, ExpressionTree expression, @Nullable Type type) {
     super(Tree.Kind.GUARDED_PATTERN);
     this.pattern = pattern;
     this.whenOperator = whenOperator;