Stanford CoreNLP Simple API Error

Question

Im just trying to run a simple example to get started with CoreNLP from here. I have added coreNLP and models 3.6 to my pom.xml. I have also added com.google.protobuf(3.0.0-beta-3) to my pom as well.

This what my code looks like:

 Document doc = new Document("add your text here! It can contain multiple sentences.");
        for (Sentence sent : doc.sentences()) {  // Will iterate over two sentences
            // We're only asking for words -- no need to load any models yet

            System.out.println("The second word of the sentence '" + sent + "' is " + sent.word(1));
            // When we ask for the lemma, it will load and run the part of speech tagger
            System.out.println("The third lemma of the sentence '" + sent + "' is " + sent.lemma(2));
            // When we ask for the parse, it will load and run the parser
            System.out.println("The parse of the sentence '" + sent + "' is " + sent.parse());
            // ...
        }

And here's the exception:

java.lang.NoSuchMethodError: edu.stanford.nlp.util.ArrayCoreMap.keySetNotNull()Ljava/util/Set; at edu.stanford.nlp.pipeline.ProtobufAnnotationSerializer.toProtoBuilder(ProtobufAnnotationSerializer.java:377) at edu.stanford.nlp.pipeline.ProtobufAnnotationSerializer.toProtoBuilder(ProtobufAnnotationSerializer.java:332) at edu.stanford.nlp.simple.Document.sentences(Document.java:480) at edu.stanford.nlp.simple.Document.sentences(Document.java:499)

UPDATE:

I just downgraded protobuf to 2.6.1 and still the same issue. Here what my pom looks like:

<dependencies>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.38</version>
    </dependency>
    <dependency>
        <groupId>com.google.inject</groupId>
        <artifactId>guice</artifactId>
        <version>4.0</version>
    </dependency>
    <dependency>
        <groupId>com.google.inject.extensions</groupId>
        <artifactId>guice-servlet</artifactId>
        <version>4.0</version>
    </dependency>

    <dependency>
        <groupId>org.apache.commons</groupId>
        <artifactId>commons-io</artifactId>
        <version>1.3.2</version>
    </dependency>
    <dependency>
        <groupId>javax.persistence</groupId>
        <artifactId>persistence-api</artifactId>
        <version>1.0.2</version>
    </dependency>
        <dependency>
        <groupId>javax.transaction</groupId>
        <artifactId>jta</artifactId>
        <version>1.1</version>
    </dependency>
    <dependency>
        <groupId>org.jsoup</groupId>
        <artifactId>jsoup</artifactId>
        <version>1.8.3</version>
    </dependency>
    <dependency>
        <groupId>edu.stanford.nlp</groupId>
        <artifactId>stanford-corenlp</artifactId>
        <version>3.6.0</version>
    </dependency>
    <dependency>
        <groupId>edu.stanford.nlp</groupId>
        <artifactId>stanford-corenlp</artifactId>
        <version>3.6.0</version>
        <classifier>models</classifier>
    </dependency>
    <dependency>
        <groupId>com.google.protobuf</groupId>
        <artifactId>protobuf-java</artifactId>
        <version>2.6.0</version>
    </dependency>

  </dependencies>

Answer 1

The simple API doesn't work with Proto v.3. It was compiled with 2.6.1, though anything in version 2 should work.