Examples with Converter com.google.common.base.Converter used on opensource projects

Example 1 with Converter

use of com.google.common.base.Converter in project error-prone by google.

the class CanonicalDuration method matchMethodInvocation.

@Override
public Description matchMethodInvocation(MethodInvocationTree tree, VisitorState state) {
    Api api;
    if (JAVA_TIME_MATCHER.matches(tree, state)) {
        api = Api.JAVA;
    } else if (JODA_MATCHER.matches(tree, state)) {
        api = Api.JODA;
    } else {
        return NO_MATCH;
    }
    if (tree.getArguments().size() != 1) {
        // TODO(cushon): ofSeconds w/ nano adjustment?
        return NO_MATCH;
    }
    Tree arg = getOnlyElement(tree.getArguments());
    if (!(arg instanceof LiteralTree)) {
        // don't inline constants
        return NO_MATCH;
    }
    Number value = constValue(arg, Number.class);
    if (value == null) {
        return NO_MATCH;
    }
    if (value.intValue() == 0) {
        switch(api) {
            case JODA:
                ExpressionTree receiver = getReceiver(tree);
                SuggestedFix fix;
                if (receiver == null) {
                    // static import of the method
                    fix = SuggestedFix.builder().addImport(api.getDurationFullyQualifiedName()).replace(tree, "Duration.ZERO").build();
                } else {
                    fix = SuggestedFix.replace(state.getEndPosition(getReceiver(tree)), state.getEndPosition(tree), ".ZERO");
                }
                return buildDescription(tree).setMessage("Duration can be expressed more clearly without units, as Duration.ZERO").addFix(fix).build();
            case JAVA:
                // don't rewrite e.g. `ofMillis(0)` to `ofDays(0)`
                return NO_MATCH;
        }
        throw new AssertionError(api);
    }
    MethodSymbol sym = getSymbol(tree);
    if (!METHOD_NAME_TO_UNIT.containsKey(sym.getSimpleName().toString())) {
        return NO_MATCH;
    }
    TemporalUnit unit = METHOD_NAME_TO_UNIT.get(sym.getSimpleName().toString());
    if (Objects.equals(BLACKLIST.get(unit), value.longValue())) {
        return NO_MATCH;
    }
    Duration duration = Duration.of(value.longValue(), unit);
    // largest unit that can be used to exactly express the duration.
    for (Map.Entry<ChronoUnit, Converter<Duration, Long>> entry : CONVERTERS.entrySet()) {
        ChronoUnit nextUnit = entry.getKey();
        if (unit.equals(nextUnit)) {
            // We reached the original unit, no simplification is possible.
            break;
        }
        Converter<Duration, Long> converter = entry.getValue();
        long nextValue = converter.convert(duration);
        if (converter.reverse().convert(nextValue).equals(duration)) {
            // We reached a larger than original unit that precisely expresses the duration, rewrite to
            // use it instead.
            String name = FACTORIES.get(api, nextUnit);
            String replacement = String.format("%s(%d%s)", name, nextValue, nextValue == ((int) nextValue) ? "" : "L");
            ExpressionTree receiver = getReceiver(tree);
            if (receiver == null) {
                // static import of the method
                SuggestedFix fix = SuggestedFix.builder().addStaticImport(api.getDurationFullyQualifiedName() + "." + name).replace(tree, replacement).build();
                return describeMatch(tree, fix);
            } else {
                return describeMatch(tree, SuggestedFix.replace(state.getEndPosition(receiver), state.getEndPosition(tree), "." + replacement));
            }
        }
    }
    return NO_MATCH;
}