Examples with Iterables.getOnlyElement com.google.common.collect.Iterables.getOnlyElement used on opensource projects

Example 1 with Iterables.getOnlyElement

use of com.google.common.collect.Iterables.getOnlyElement in project error-prone by google.

the class FormatStringValidation method validate.

@Nullable
public static ValidationResult validate(Collection<? extends ExpressionTree> arguments, final VisitorState state) {
    Deque<ExpressionTree> args = new ArrayDeque<>(arguments);
    Stream<String> formatStrings = constValues(args.removeFirst());
    if (formatStrings == null) {
        return null;
    }
    // Bail out, since we don't know what the actual argument types are.
    if (args.size() == 1) {
        Type type = ASTHelpers.getType(Iterables.getOnlyElement(args));
        if (type instanceof Type.ArrayType && ASTHelpers.isSameType(((Type.ArrayType) type).elemtype, state.getSymtab().objectType, state)) {
            return null;
        }
    }
    Iterable<Object> instances = Iterables.transform(args, new Function<ExpressionTree, Object>() {

        @Override
        public Object apply(ExpressionTree input) {
            try {
                return getInstance(input, state);
            } catch (Throwable t) {
                // ignore symbol completion failures
                return null;
            }
        }
    });
    return formatStrings.map(formatString -> validate(formatString, instances)).filter(x -> x != null).findFirst().orElse(null);
}

Example 2 with Iterables.getOnlyElement

use of com.google.common.collect.Iterables.getOnlyElement in project auto by google.

the class MoreTypesIsTypeOfTest method extractReturnTypeFromHolder.

// Utility methods for this test.
private TypeMirror extractReturnTypeFromHolder(TypeElement typeElement) {
    Element element = Iterables.getOnlyElement(typeElement.getEnclosedElements());
    TypeMirror arrayType = MoreElements.asExecutable(element).getReturnType();
    return arrayType;
}