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

Introduction

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

Prototype

public abstract <V> Optional<V> transform(Function<? super T, V> function);

Source Link

Document

If the instance is present, it is transformed with the given Function ; otherwise, Optional#absent is returned.

Usage

From source file:org.jclouds.openstack.marconi.v1.domain.MessageStream.java

@Override
public Optional<Object> nextMarker() {
    Optional<Link> nextMarkerLink = Iterables.tryFind(getLinks(), IS_NEXT_LINK);
    return nextMarkerLink.transform(TO_LIST_OPTIONS);
}

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From source file:com.facebook.buck.java.PrebuiltJarBuildRuleFactory.java

@Override
protected void amendBuilder(PrebuiltJarRule.Builder builder, BuildRuleFactoryParams params) {
    // binary_jar
    String binaryJar = params.getRequiredStringAttribute("binary_jar");
    String binaryJarFile = params.resolveFilePathRelativeToBuildFileDirectory(binaryJar);
    builder.setBinaryJar(binaryJarFile);

    // source_jar
    Optional<String> sourceJar = params.getOptionalStringAttribute("source_jar");
    builder.setSourceJar(sourceJar.transform(params.getResolveFilePathRelativeToBuildFileDirectoryTransform()));

    // javadoc_url
    Optional<String> javadocUrl = params.getOptionalStringAttribute("javadoc_url");
    builder.setJavadocUrl(javadocUrl);//w w  w . j  av a 2  s.c o m
}

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From source file:com.facebook.buck.android.AndroidLibraryBuildRuleFactory.java

@Override
protected void amendBuilder(DefaultJavaLibraryRule.Builder abstractBuilder, BuildRuleFactoryParams params)
        throws NoSuchBuildTargetException {
    super.amendBuilder(abstractBuilder, params);
    AndroidLibraryRule.Builder builder = (AndroidLibraryRule.Builder) abstractBuilder;

    // manifest/*from  ww  w.j a va 2  s  .co m*/
    Optional<String> manifestFile = params.getOptionalStringAttribute("manifest");
    builder.setManifestFile(
            manifestFile.transform(params.getResolveFilePathRelativeToBuildFileDirectoryTransform()));
}

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From source file:com.mirantis.opendaylight.route.RouteBuilderServiceImpl.java

private ListenableFuture<Short> allocateVlan(ReadWriteTransaction tx, Uri srcNode, Uri dstNode) {
    if (Objects.equals(srcNode, dstNode)) {
        return immediateFuture(null);
    }/*from  w  w w. ja  v a2s.  c o m*/
    InstanceIdentifier<VlanCounter> counterId = InstanceIdentifier.create(VlanCounter.class);
    return transform(tx.read(CONFIGURATION, counterId), (Optional<VlanCounter> counter) -> {
        short curVal = counter.transform(cnt -> cnt.getNextVlan().getValue()).or(1L).shortValue();
        Counter32 nextVal = new Counter32(curVal < 4094 ? curVal + 1L : 1L);
        tx.put(CONFIGURATION, counterId, new VlanCounterBuilder().setNextVlan(nextVal).build());
        return curVal;
    }, executor);
}

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From source file:springfox.documentation.swagger.readers.operation.SwaggerOperationTagsReader.java

private Set<String> operationTags(OperationContext context) {
    Optional<ApiOperation> annotation = context.findAnnotation(ApiOperation.class);
    return annotation.transform(tagsFromOperation()).or(Sets.<String>newHashSet());
}

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From source file:com.facebook.buck.parser.ProjectConfigRuleFactory.java

@Override
protected void amendBuilder(ProjectConfigRule.Builder builder, BuildRuleFactoryParams params)
        throws NoSuchBuildTargetException {
    Function<String, BuildTarget> contextualBuildParser = createBuildTargetParseFunction(params);

    // src_target
    Optional<String> srcTargetId = params.getOptionalStringAttribute("src_target");
    builder.setSrcTarget(srcTargetId.transform(contextualBuildParser));

    // src_roots/*ww w . j  a v  a  2 s .  c  o m*/
    // Note that the values in this array are passed as-is, rather than resolved to local project
    // paths.
    List<String> srcRoots = params.getNullableListAttribute("src_roots");
    builder.setSrcRoots(srcRoots);

    // test_target
    Optional<String> testTargetId = params.getOptionalStringAttribute("test_target");
    builder.setTestTarget(testTargetId.transform(contextualBuildParser));

    // test_roots
    // Note that this value is passed as-is, rather than resolved to a project local path.
    List<String> testRoots = params.getNullableListAttribute("test_roots");
    builder.setTestRoots(testRoots);

    // is_intellij_plugin
    builder.setIsIntelliJPlugin(params.getBooleanAttribute("is_intellij_plugin"));
}

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From source file:springfox.documentation.swagger.readers.operation.SwaggerOperationTagsReader.java

private Set<String> controllerTags(OperationContext context) {
    Optional<Api> controllerAnnotation = context.findControllerAnnotation(Api.class);
    return controllerAnnotation.transform(tagsFromController()).or(Sets.<String>newHashSet());
}

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From source file:springfox.documentation.swagger.web.SwaggerApiListingReader.java

@Override
public void apply(ApiListingContext apiListingContext) {
    Class<?> controllerClass = apiListingContext.getResourceGroup().getControllerClass();
    Optional<Api> apiAnnotation = fromNullable(findAnnotation(controllerClass, Api.class));
    String description = emptyToNull(apiAnnotation.transform(descriptionExtractor()).orNull());

    Set<String> tagSet = apiAnnotation.transform(tags()).or(Sets.<String>newTreeSet());
    if (tagSet.isEmpty()) {
        tagSet.add(apiListingContext.getResourceGroup().getGroupName());
    }/* ww  w .j  av  a 2s .  c o  m*/
    apiListingContext.apiListingBuilder().description(description).tagNames(tagSet);
}

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From source file:org.locationtech.geogig.rocksdb.RocksdbBlobStore.java

@Override
public Optional<InputStream> getBlobAsStream(String namespace, String path) {
    Optional<byte[]> blob = getBlob(path);
    return blob.transform((b) -> new ByteArrayInputStream(b));
}

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From source file:com.google.testing.junit.runner.junit4.JUnit4Config.java

/**
 * Returns the XML output path, or null if not specified.
 *//*from  w  w  w.  j  av  a  2s .  c  o  m*/
public Optional<Path> getXmlOutputPath() {
    if (!xmlOutputPath.isPresent()) {
        Optional<String> envXmlOutputPath = Optional.fromNullable(System.getenv(XML_OUTPUT_FILE_ENV_VAR));
        return envXmlOutputPath.transform(new Function<String, Path>() {
            @Override
            public Path apply(String path) {
                return FileSystems.getDefault().getPath(path);
            }
        });
    }

    return xmlOutputPath;
}

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