Example usage for com.google.common.base Optional fromNullable

Introduction

In this page you can find the example usage for com.google.common.base Optional fromNullable.

Prototype

public static <T> Optional<T> fromNullable(@Nullable T nullableReference)

Source Link

Document

If nullableReference is non-null, returns an Optional instance containing that reference; otherwise returns Optional#absent .

Usage

From source file:dagger2.internal.codegen.writer.WildcardName.java

static WildcardName forTypeMirror(WildcardType mirror) {
    return new WildcardName(Optional.fromNullable(mirror.getExtendsBound()).transform(FOR_TYPE_MIRROR),
            Optional.fromNullable(mirror.getSuperBound()).transform(FOR_TYPE_MIRROR));
}

From source file:org.locationtech.geogig.api.plumbing.diff.AttributeDiffFactory.java

public static AttributeDiff attributeDiffFromText(Class<?> clazz, String s) {

    String[] tokens = s.split("\t");
    AttributeDiff ad;//from w ww  .  ja v a 2 s  . co m
    if (Geometry.class.isAssignableFrom(clazz)) {
        ad = new GeometryAttributeDiff(s);
    } else {
        if (AttributeDiff.TYPE.REMOVED.name().startsWith(tokens[0])) {
            Preconditions.checkArgument(tokens.length == 2, "Wrong difference definition:", s);
            Object oldValue = TextValueSerializer.fromString(FieldType.forBinding(clazz), tokens[1]);
            ad = new GenericAttributeDiffImpl(Optional.fromNullable(oldValue), null);
        } else if (AttributeDiff.TYPE.ADDED.name().startsWith(tokens[0])) {
            Preconditions.checkArgument(tokens.length == 2, "Wrong difference definition:", s);
            Object newValue = TextValueSerializer.fromString(FieldType.forBinding(clazz), tokens[1]);
            ad = new GenericAttributeDiffImpl(null, Optional.fromNullable(newValue));
        } else if (AttributeDiff.TYPE.MODIFIED.name().startsWith(tokens[0])) {
            Preconditions.checkArgument(tokens.length == 3, "Wrong difference definition:", s);
            Object oldValue = TextValueSerializer.fromString(FieldType.forBinding(clazz), tokens[1]);
            Object newValue = TextValueSerializer.fromString(FieldType.forBinding(clazz), tokens[2]);
            ad = new GenericAttributeDiffImpl(Optional.fromNullable(oldValue), Optional.fromNullable(newValue));
        } else {
            throw new IllegalArgumentException("Wrong difference definition:" + s);
        }
    }
    return ad;

}

From source file:com.jythonui.server.RUtils.java

private static Optional<Date> retrieveD(Object o, String propName) {
    Date d = null;//from  ww w . ja va2 s . c  o m
    try {
        d = (Date) PropertyUtils.getProperty(o, propName);
    } catch (IllegalAccessException | InvocationTargetException | NoSuchMethodException e) {
        return null;
    }
    return Optional.fromNullable(d);
}

From source file:ninja.leaping.permissionsex.backend.DataStoreFactories.java

public static Optional<DataStoreFactory> get(String type) {
    return Optional.fromNullable(REGISTRY.get(type));
}

From source file:com.google.cloud.trace.jdbc.ThreadLocalTracerStore.java

/** Returns the current thread's {@link Tracer}. */
public static Optional<Tracer> getCurrent() {
    return Optional.fromNullable(perThreadTracer.get());
}

From source file:com.qcadoo.commons.functional.FluentOptional.java

public static <V> FluentOptional<V> fromNullable(final V valueOrNull) {
    return new FluentOptional<V>(Optional.fromNullable(valueOrNull));
}

From source file:org.locationtech.geogig.api.RevFeatureBuilder.java

/**
 * Constructs a new {@link RevFeature} from the provided {@link Feature}.
 * /*from  www . j  a va  2 s  .c  o  m*/
 * @param feature the feature to build from
 * @return the newly constructed RevFeature
 */
public static RevFeature build(Feature feature) {
    if (feature == null) {
        throw new IllegalStateException("No feature set");
    }

    Collection<Property> props = feature.getProperties();

    ImmutableList.Builder<Optional<Object>> valuesBuilder = new ImmutableList.Builder<Optional<Object>>();

    for (Property prop : props) {
        valuesBuilder.add(Optional.fromNullable(prop.getValue()));
    }

    return RevFeatureImpl.build(valuesBuilder.build());
}

From source file:com.qcadoo.commons.functional.Optionals.java

public static <F> Function<F, Optional<F>> lift() {
    return new Function<F, Optional<F>>() {

        @Override/*  w  w w.  java2 s. co m*/
        public Optional<F> apply(final F input) {
            return Optional.fromNullable(input);
        }
    };
}

From source file:org.parboiled.support.Chars.java

public static String escape(final char c) {
    return Optional.fromNullable(ESCAPE_MAP.get(c)).or(String.valueOf(c));
}

From source file:google.registry.tools.server.ToolsServerModule.java

@Provides
@Parameter("clientId")
static Optional<String> provideClientId(HttpServletRequest req) {
    return Optional.fromNullable(emptyToNull(req.getParameter(CreateGroupsAction.CLIENT_ID_PARAM)));
}