Examples with TryTree com.sun.source.tree.TryTree used on opensource projects

Example 11 with TryTree

use of com.sun.source.tree.TryTree in project error-prone by google.

the class TryFailThrowable method fixWithReturnOrBoolean.

private static Fix fixWithReturnOrBoolean(TryTree tryTree, StatementTree failStatement, VisitorState state) {
    Tree parent = state.getPath().getParentPath().getLeaf();
    Tree grandparent = state.getPath().getParentPath().getParentPath().getLeaf();
    if (parent.getKind() == BLOCK && grandparent.getKind() == METHOD && tryTree == getLastStatement((BlockTree) parent)) {
        return fixWithReturn(tryTree, failStatement, state);
    } else {
        return fixWithBoolean(tryTree, failStatement, state);
    }
}

Example 12 with TryTree

use of com.sun.source.tree.TryTree in project error-prone by google.

the class CatchFail method deleteFix.

// Extract the argument to a call to assertWithMessage, e.g. in:
// assertWithMessage("message").fail();
Optional<Fix> deleteFix(TryTree tree, ImmutableList<CatchTree> catchBlocks, VisitorState state) {
    SuggestedFix.Builder fix = SuggestedFix.builder();
    if (tree.getFinallyBlock() != null || catchBlocks.size() < tree.getCatches().size()) {
        // If the try statement has a finally region, or other catch blocks, delete only the
        // unnecessary blocks.
        catchBlocks.stream().forEachOrdered(fix::delete);
    } else {
        // The try statement has no finally region and all catch blocks are unnecessary. Replace it
        // with the try statements, deleting all catches.
        List<? extends StatementTree> tryStatements = tree.getBlock().getStatements();
        String source = state.getSourceCode().toString();
        // Replace the full region to work around a GJF partial formatting bug that prevents it from
        // re-indenting unchanged lines. This means that fixes may overlap, but that's (hopefully)
        // unlikely.
        // TODO(b/24140798): emit more precise replacements if GJF is fixed
        fix.replace(tree, source.substring(((JCTree) tryStatements.get(0)).getStartPosition(), state.getEndPosition(Iterables.getLast(tryStatements))));
    }
    MethodTree enclosing = findEnclosing(state.getPath());
    if (enclosing == null) {
        // There isn't an enclosing method, possibly because we're in a lambda or initializer block.
        return Optional.empty();
    }
    if (isExpectedExceptionTest(ASTHelpers.getSymbol(enclosing), state)) {
        // tests, so don't use that fix for methods annotated with @Test(expected=...).
        return Optional.empty();
    }
    // Fix up the enclosing method's throws declaration to include the new thrown exception types.
    Collection<Type> thrownTypes = ASTHelpers.getSymbol(enclosing).getThrownTypes();
    Types types = state.getTypes();
    // Find all types in the deleted catch blocks that are not already in the throws declaration.
    ImmutableList<Type> toThrow = catchBlocks.stream().map(c -> ASTHelpers.getType(c.getParameter())).flatMap(t -> t instanceof UnionClassType ? ImmutableList.copyOf(((UnionClassType) t).getAlternativeTypes()).stream() : Stream.of(t)).filter(t -> thrownTypes.stream().noneMatch(x -> types.isAssignable(t, x))).collect(toImmutableList());
    if (!toThrow.isEmpty()) {
        if (!TEST_CASE.matches(enclosing, state)) {
            // not be a safe local refactoring.
            return Optional.empty();
        }
        String throwsString = toThrow.stream().map(t -> SuggestedFixes.qualifyType(state, fix, t)).distinct().collect(joining(", "));
        if (enclosing.getThrows().isEmpty()) {
            // Add a new throws declaration.
            fix.prefixWith(enclosing.getBody(), "throws " + throwsString);
        } else {
            // Append to an existing throws declaration.
            fix.postfixWith(Iterables.getLast(enclosing.getThrows()), ", " + throwsString);
        }
    }
    return Optional.of(fix.build());
}