labbcat-java

Client library for communicating with LaBB-CAT servers using Java.

LaBB-CAT is a web-based linguistic annotation store that stores audio or video recordings, text transcripts, and other annotations.

Annotations of various types can be automatically generated or manually added.

LaBB-CAT servers are usually password-protected linguistic corpora, and can be accessed manually via a web browser, or programmatically using a client library like this one.

Detailed documentation is available at https://nzilbb.github.io/labbcat-java/

Dependencies

• nzilbb.ag.jar

Build targets

• mvn package - builds target/nzilbb.labbcat-n.n.n.jar
• mvn test - runs unit tests, which requires a running LaBB-CAT server to work; you must set the URL/credentials in the unit test files in nzilbb/labbcat/test/
• mvn site - produces JavaDoc API documentation.

Usage

The following example shows how to:

1. get some basic corpus structure information,
2. upload a transcript,
3. wait for annotation layer generation to finish,
4. extract the newly-generated annotations, and
5. search for instances of the word "and".

// create LaBB-CAT client
LabbcatView labbcat = new LabbcatView("https://labbcat.canterbury.ac.nz", "demo", "demo");

// get a corpus ID
String[] corpora = labbcat.getCorpusIds();
String corpus = ids[0];

// get a transcript type
Layer typeLayer = labbcat.getLayer("transcript_type");
String transcriptType = typeLayer.getValidLabels().keySet().iterator().next();

// upload a transcript
File transcript = new File("/some/transcript.txt");
String taskId = labbcat.newTranscript(transcript, null, null, transcriptType, corpus, "test");

// wait until all automatic annotations have been generated
TaskStatus layerGenerationTask = labbcat.waitForTask(taskId, 30);

// get all the POS annotations
Annotation[] pos = labbcat.getAnnotations(transcript.getName(), "pos");

// search for tokens of "and"
Matches[] matches = labbcat.getMatches(
    labbcat.search(
       new PatternBuilder().addMatchLayer("orthography", "and").build(),
       participantIds, null, true, false, null), 1);

Developers

Prerequisites

• The JDK for at least Java 8

  sudo apt install default-jdk
  

• Maven

  sudo apt install maven
  

Build nzilbb.labbcat.jar

mvn package

Run all unit tests

mvn test

Build documentation site

mvn site

Deploying to OSSRH

OSSRH is the central Maven repository where nzilbb.ag modules are deployed (published).

There are two type of deployment:

• snapshot: a transient deployment that can be updated during development/testing
• release: an official published version that cannot be changed once it's deployed

A snapshot deployment is done when the module version (version tag in pom.xml) ends with -SNAPSHOT. Otherwise, any deployment is a release.

Snapshot Deployment

To perform a snapshot deployment:

1. Ensure the version in pom.xml is suffixed with -SNAPSHOT
2. Execute the command:

   mvn clean deploy
   

Release Deployment

To perform a release deployment:

1. Ensure the version in pom.xml isn't suffixed with -SNAPSHOT e.g. use something like the following command from within the ag directory:

   mvn versions:set -DnewVersion=1.1.0
   

2. Execute the command:

   mvn clean deploy -P release
   

3. Happy with everything? Complete the release with:

   mvn nexus-staging:release -P release
   

   Otherwise:

   mvn nexus-staging:drop -P release
   

   ...and start again.
4. Regenerate the citation file:

   mvn cff:create
   

5. Commit/push all changes and create a release in GitHub