BioValidator is a schema validator that validates biological file format like Fasta, GFF, etc. Currently, it supports FASTA, GFF3, and CSV file formats

The most simple way to validate supported file types is to use ValidatorHelper provided by library.
Example: Arguments in the below validate method

1. filename: absolute file path
2. validator-type: type of validator
3. isStrict: whether to validate in strict mode or permissive

ValidationResult validationResult = ValidatorHelper.validate("filepath", ValidatorType.FASTA, true);
OR
ValidationResult validationResult = ValidatorHelper.validate("filepath", "fasta-dna", true);
OR
ValidationResult validationResult = ValidatorHelper.validateFasta("filepath");

Check whether file is valid or not:

assertTrue(validationResult.isValid());

If file contain errors or warnings:

if (!validationResult.isValid()) {
    validationResult.getErrorMessages().forEach(System.out::println);
    validationResult.getWarningMessages().forEach(System.out::println);
}

Validator's behaviour and result and can be easily customize, ValidatorBuilder can be used to customize behaviour and result of the validator.
Example: To validate a file by disabling warnings and continue validation even if error occurred

Validator validator = ValidatorBuilder.withFile("path", "fasta-protein")
        .disableWarnings()
        .enableErrors()
        .disableStopAtFirstError()
        .build();

assertTrue(validator.validate().isValid());
OR
validator.validate(result -> {
    assertTrue(result.isValid());
})

String dnaSequence = "> seqId | header name\nACTGACTGACTG";

InputStreamReader isr = new InputStreamReader(new ByteArrayInputStream(dnaSequence.getBytes()));
Validator validator = new FastaValidator(isr, SequenceType.DNA);
ValidationResult result = validator.validate();

assertTrue(result.isValid());

Maven dependency

<dependency>
  <groupId>org.intermine</groupId>
  <artifactId>biovalidator</artifactId>
  <version>0.1.2</version>
  <type>pom</type>
</dependency>

Gradle dependency

compile 'org.intermine:biovalidator:0.1.2'

Step 1: Get biovalidator Fat-Jar(either build from source or dirctly download from bintray

• Build from source : $ ./gradlew createFatJar

  • this will generate a jar named 'biovalidator-fat-x.x.x.jar' in 'build/libs' directory

• Or Download fat-jar version of biovalidator from bintray

Setp 2: run as an executable jar file

java -jar biovalidator-fat-0.1.2.jar --help

Documentation about BioValidator uses and validation rules: https://github.com/intermine/biovalidator/wiki

JavaDocs link : http://intermine.org/biovalidator/javadoc