sdedic commented on a change in pull request #314: Add a new fix to
BoxedIdentityComparison
URL: https://github.com/apache/incubator-netbeans/pull/314#discussion_r154865421
##########
File path:
java.hints/src/org/netbeans/modules/java/hints/bugs/BoxedIdentityComparison.java
##########
@@ -82,31 +85,94 @@
})
public static ErrorDescription wrapperComparisonUsingIdentity(HintContext
ctx) {
- TreePath logExprPath = ctx.getPath();
- BinaryTree bt = (BinaryTree)logExprPath.getLeaf();
+ TreePath comparisonExprPath = ctx.getPath();
+ BinaryTree bt = (BinaryTree)comparisonExprPath.getLeaf();
TreePath wrapperPath = ctx.getVariables().get("$x"); // NOI18N
- Tree otherOperand = bt.getRightOperand();
+ assert bt.getLeftOperand() == wrapperPath.getLeaf();
+ TreePath otherPath = ctx.getVariables().get("$y"); // NOI18N
+ assert bt.getRightOperand() == otherPath.getLeaf();
+
+ CompilationInfo info = ctx.getInfo();
+ Trees trees = info.getTrees();
// JLS 15.21; if the other type is primitive, the comparison is correct
- TypeMirror t = ctx.getInfo().getTrees().getTypeMirror(new
TreePath(logExprPath, otherOperand));
+ TypeMirror t = trees.getTypeMirror(otherPath);
if (t == null || t.getKind() != TypeKind.DECLARED) {
return null;
}
- t = ctx.getInfo().getTrees().getTypeMirror(wrapperPath);
+ t = trees.getTypeMirror(wrapperPath);
// primitive type is assignable to the wrapper, so it will trigger the
hint
if (t == null || t.getKind() != TypeKind.DECLARED) {
return null;
}
+
final Fix fix;
-
- if
(ctx.getInfo().getSourceVersion().compareTo(SourceVersion.RELEASE_7) < 0) {
- fix = null;
+ if (NPECheck.isSafeToDereference(info, wrapperPath)) {
+ fix = new CallEqualsFix(info, comparisonExprPath,
true).toEditorFix();
+ } else if (NPECheck.isSafeToDereference(info, otherPath)) {
+ fix = new CallEqualsFix(info, comparisonExprPath,
false).toEditorFix();
+ } else if (info.getSourceVersion().compareTo(SourceVersion.RELEASE_7)
< 0) {
+ fix = null;
} else {
- fix = new NullSafeEqualsFix(TreePathHandle.create(logExprPath,
ctx.getInfo())).toEditorFix();
+ fix = new
NullSafeEqualsFix(TreePathHandle.create(comparisonExprPath,
info)).toEditorFix();
+ }
+
+ return ErrorDescriptionFactory.forTree(ctx, comparisonExprPath,
+
TEXT_BoxedValueIdentityComparison(info.getTypeUtilities().getTypeName(t)), fix);
+ }
+
+ @NbBundle.Messages({
+ "# {0} - stringified receiver expression tree",
+ "# {1} - stringified equals() arg expression tree",
+ "FIX_CallEquals=Replace with ''{0}.equals({1})''",
+ "# {0} - stringified receiver expression tree",
+ "# {1} - stringified equals() arg expression tree",
+ "FIX_NegateCallEquals=Replace with ''!{0}.equals({1})''",
+ })
+ private static class CallEqualsFix extends JavaFix {
+
+ private final boolean lhsIsReceiver;
+ private final String receiverString;
+ private final String argString;
+ private final boolean invert;
+
+ public CallEqualsFix(CompilationInfo info, TreePath
comparisonExprPath, boolean lhsIsReceiver) {
+ super(info, comparisonExprPath);
+ this.lhsIsReceiver = lhsIsReceiver;
+ BinaryTree bt = (BinaryTree) comparisonExprPath.getLeaf();
+ ExpressionTree receiver = (lhsIsReceiver ? bt.getLeftOperand() :
bt.getRightOperand());
+ @SuppressWarnings("LocalVariableHidesMemberVariable")
+ String receiverString = receiver.toString();
+ this.receiverString = (JavaFixUtilities.isPrimary(receiver) ?
receiverString : "(" + receiverString + ")");
Review comment:
add // NOI18N
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