Example usage for java.util Collections singletonList

Introduction

In this page you can find the example usage for java.util Collections singletonList.

Prototype

public static <T> List<T> singletonList(T o) 

Source Link

Document

Returns an immutable list containing only the specified object.

Usage

From source file:MainClass.java

public static void main(String[] a) {
    System.out.println(Collections.singletonList("a"));
    System.out.println(Collections.singleton("a"));
    System.out.println(Collections.singletonMap("a", "b"));

}

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From source file:Main.java

public static void main(String args[]) {
    // create an array of string objs
    String init[] = { "One", "Two", "Three", "One", "Two", "Three", "from java2s.com" };

    // create one list
    List<String> list = new ArrayList<String>(Arrays.asList(init));

    System.out.println("List value before: " + list);

    // create singleton list
    list = Collections.singletonList("One");

    System.out.println("List value after: " + list);
}

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From source file:Main.java

public static void main(String[] args) throws Exception {
    XMLEventFactory eventFactory = XMLEventFactory.newInstance();
    XMLEventWriter writer = XMLOutputFactory.newInstance().createXMLEventWriter(System.out);

    Namespace ns1 = eventFactory.createNamespace("ns1", "http://www.e.com/ns1");
    Namespace ns2 = eventFactory.createNamespace("ns2", "http://www.e.com/ns2");
    List<Namespace> namespaceList = new ArrayList<Namespace>();
    namespaceList.add(ns1);//  w w w.ja va 2 s.  co  m
    namespaceList.add(ns2);

    Attribute attribute = eventFactory.createAttribute(ns2.getPrefix(), ns2.getNamespaceURI(), "attribute",
            "true");

    writer.add(eventFactory.createStartElement(ns1.getPrefix(), ns1.getNamespaceURI(), "sample",
            Collections.singletonList(attribute).iterator(), namespaceList.iterator()));
    writer.add(eventFactory.createEndDocument());
    writer.flush();
}

---

From source file:Main.java

public static void main(String[] args) throws Exception {
    String source = "<p xmlns='http://www.java2s.com/nfe' versao='2.00'></p>";

    XPathFactory xPathFactory = XPathFactory.newInstance();
    XPath xPath = xPathFactory.newXPath();

    NamespaceContext context = new NamespaceContext() {
        String PREFIX = "nfe";
        String URI = "http://www.java2s.com/nfe";

        @Override//from  w w w.  j  a va  2s  .co  m
        public String getNamespaceURI(String prefix) {
            return (PREFIX.equals(prefix)) ? URI : XMLConstants.NULL_NS_URI;
        }

        @Override
        public String getPrefix(String namespaceUri) {
            return (URI.equals(namespaceUri)) ? PREFIX : XMLConstants.DEFAULT_NS_PREFIX;
        }

        @Override
        public Iterator getPrefixes(String namespaceUri) {
            return Collections.singletonList(this.getPrefix(namespaceUri)).iterator();
        }
    };
    xPath.setNamespaceContext(context);
    InputSource inputSource = new InputSource(new StringReader(source));
    String versao = xPath.evaluate("//nfe:p/@versao", inputSource);
    System.out.println(versao.toString());
}

---

From source file:Main.java

public static void main(String[] args) throws Exception {
    KeyPairGenerator kpg = KeyPairGenerator.getInstance("DSA");
    kpg.initialize(1024, new SecureRandom());
    KeyPair dsaKeyPair = kpg.generateKeyPair();

    XMLSignatureFactory sigFactory = XMLSignatureFactory.getInstance();
    Reference ref = sigFactory.newReference("#Body", sigFactory.newDigestMethod(DigestMethod.SHA1, null));
    SignedInfo signedInfo = sigFactory.newSignedInfo(
            sigFactory.newCanonicalizationMethod(CanonicalizationMethod.INCLUSIVE_WITH_COMMENTS,
                    (C14NMethodParameterSpec) null),
            sigFactory.newSignatureMethod(SignatureMethod.DSA_SHA1, null), Collections.singletonList(ref));
    KeyInfoFactory kif = sigFactory.getKeyInfoFactory();
    KeyValue kv = kif.newKeyValue(dsaKeyPair.getPublic());
    KeyInfo keyInfo = kif.newKeyInfo(Collections.singletonList(kv));

    XMLSignature xmlSig = sigFactory.newXMLSignature(signedInfo, keyInfo);
}

---

From source file:MainClass.java

public static void main(String[] args) throws Exception {

    KeyPairGenerator kpg = KeyPairGenerator.getInstance("DSA");
    kpg.initialize(1024, new SecureRandom());
    KeyPair dsaKeyPair = kpg.generateKeyPair();

    XMLSignatureFactory sigFactory = XMLSignatureFactory.getInstance();
    Reference ref = sigFactory.newReference("#Body", sigFactory.newDigestMethod(DigestMethod.SHA1, null));
    SignedInfo signedInfo = sigFactory.newSignedInfo(
            sigFactory.newCanonicalizationMethod(CanonicalizationMethod.INCLUSIVE_WITH_COMMENTS,
                    (C14NMethodParameterSpec) null),
            sigFactory.newSignatureMethod(SignatureMethod.DSA_SHA1, null), Collections.singletonList(ref));
    KeyInfoFactory kif = sigFactory.getKeyInfoFactory();
    KeyValue kv = kif.newKeyValue(dsaKeyPair.getPublic());
    KeyInfo keyInfo = kif.newKeyInfo(Collections.singletonList(kv));

    XMLSignature xmlSig = sigFactory.newXMLSignature(signedInfo, keyInfo);
}

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From source file:io.ingenieux.lambda.shell.LambdaShell.java

public static void main(String[] args) throws Exception {
    final Map<String, List<String>> result = new LambdaShell()
            .runCommands(Collections.singletonList("ps -aux"));

    System.err.println(result);//  w w w.  j a v a2 s.  c  o  m
}

---

From source file:com.example.bigtable.sample.CreateTable.java

public static void main(String[] args) throws Exception {
    Configuration conf = HBaseConfiguration.create();
    String[] otherArgs = new GenericOptionsParser(conf, args).getRemainingArgs();
    if (otherArgs.length != 1) {
        System.err.println("Usage: <table-name>");
        System.exit(2);//from   w w w.j a v a2  s .c  o  m
    }

    TableName tableName = TableName.valueOf(otherArgs[otherArgs.length - 1]);
    createTable(tableName, conf, Collections.singletonList("cf"));
}

---

From source file:de.tudarmstadt.ukp.experiments.dip.wp1.documents.Step1PrepareContainers.java

public static void main(String[] args) throws IOException {
    // queries with narratives in CSV
    File queries = new File(args[0]);
    File relevantInformationExamplesFile = new File(args[1]);

    Map<Integer, Map<Integer, List<String>>> relevantInformationMap = parseRelevantInformationFile(
            relevantInformationExamplesFile);

    // output dir
    File outputDir = new File(args[2]);
    if (!outputDir.exists()) {
        outputDir.mkdirs();/* w ww. j  a  v  a 2  s .  c  o  m*/
    }

    // iterate over queries
    CSVParser csvParser = CSVParser.parse(queries, Charset.forName("utf-8"), CSVFormat.DEFAULT);
    for (CSVRecord record : csvParser) {
        // create new container, fill, and store
        QueryResultContainer container = new QueryResultContainer();
        container.qID = record.get(0);
        container.query = record.get(1);

        // Fill some dummy text first
        container.relevantInformationExamples.addAll(Collections.singletonList("ERROR. Information missing."));
        container.irrelevantInformationExamples
                .addAll(Collections.singletonList("ERROR. Information missing."));

        // and now fill it with existing information if available
        Integer queryID = Integer.valueOf(container.qID);
        if (relevantInformationMap.containsKey(queryID)) {
            if (relevantInformationMap.get(queryID).containsKey(0)) {
                container.irrelevantInformationExamples = new ArrayList<>(
                        relevantInformationMap.get(queryID).get(0));
            }

            if (relevantInformationMap.get(queryID).containsKey(1)) {
                container.relevantInformationExamples = new ArrayList<>(
                        relevantInformationMap.get(queryID).get(1));
            }
        }

        File outputFile = new File(outputDir, container.qID + ".xml");
        FileUtils.writeStringToFile(outputFile, container.toXML());
        System.out.println("Finished " + outputFile);
    }
}

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From source file:kafka.examples.consumer.BasicConsumerExample.java

public static void main(String[] args) {
    ArgumentParser parser = argParser();

    try {//from  ww  w .  j  av  a2 s  . c  o m
        Namespace res = parser.parseArgs(args);

        /* parse args */
        String brokerList = res.getString("bootstrap.servers");
        String topic = res.getString("topic");
        String serializer = res.getString("serializer");

        Properties consumerConfig = new Properties();
        consumerConfig.put("group.id", "my-group");
        consumerConfig.put("bootstrap.servers", brokerList);
        consumerConfig.put("auto.offset.reset", "earliest");
        consumerConfig.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG,
                "org.apache.kafka.common.serialization.ByteArrayDeserializer");
        consumerConfig.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG,
                "org.apache.kafka.common.serialization.ByteArrayDeserializer");

        KafkaConsumer<byte[], byte[]> consumer = new KafkaConsumer<>(consumerConfig);
        consumer.subscribe(Collections.singletonList(topic));

        while (true) {
            ConsumerRecords<byte[], byte[]> records = consumer.poll(1000);
            for (ConsumerRecord<byte[], byte[]> record : records) {
                System.out.printf(
                        "Received Message topic =%s, partition =%s, offset = %d, key = %s, value = %s\n",
                        record.topic(), record.partition(), record.offset(), deserialize(record.key()),
                        deserialize(record.value()));
            }

            consumer.commitSync();
        }

    } catch (ArgumentParserException e) {
        if (args.length == 0) {
            parser.printHelp();
            System.exit(0);
        } else {
            parser.handleError(e);
            System.exit(1);
        }
    }

}

---

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