CODEWITHSUNDEEP
javamaven-2yamlsnakeyaml
Hank Gay
Hank Gay

Reputation: 71939

Has anyone succesfully loaded a YAML file using SnakeYAML from a local Maven repo?

If I reference the SnakeYAML jar directly from a test program (see bottom), everything works. If I'm inside my Maven-created project, I get the following output from my unit tests:

java.lang.NoSuchMethodError: java.util.LinkedList.push(Ljava/lang/Object;)V
    at org.yaml.snakeyaml.scanner.ScannerImpl.addIndent(ScannerImpl.java:482)
    at org.yaml.snakeyaml.scanner.ScannerImpl.fetchBlockEntry(ScannerImpl.java:653)
    at org.yaml.snakeyaml.scanner.ScannerImpl.fetchMoreTokens(ScannerImpl.java:268)
    at org.yaml.snakeyaml.scanner.ScannerImpl.checkToken(ScannerImpl.java:178)
    at org.yaml.snakeyaml.parser.ParserImpl$ParseImplicitDocumentStart.produce(ParserImpl.java:213)
    at org.yaml.snakeyaml.parser.ParserImpl.peekEvent(ParserImpl.java:172)
    at org.yaml.snakeyaml.parser.ParserImpl.checkEvent(ParserImpl.java:143)
    at org.yaml.snakeyaml.parser.ParserImpl.checkEvent(ParserImpl.java:163)
    at org.yaml.snakeyaml.composer.Composer.getSingleNode(Composer.java:66)
    at org.yaml.snakeyaml.constructor.BaseConstructor.getSingleData(BaseConstructor.java:60)
    at org.yaml.snakeyaml.Loader.load(Loader.java:35)
    at org.yaml.snakeyaml.Yaml.load(Yaml.java:134)

Since Maven couldn't find SnakeYAML in the central repos, I manually installed it into my local repo. In case it matters, I'm on a Mac using SnakeYAML 0.9, and Maven 2.0.9.

Sample YAML File

- 
    accountCode: foo
    accountId: 1
    email: [email protected]
    userId: 1

Working Test Program

import java.io.*;
import java.util.*;

import org.yaml.snakeyaml.Yaml;

/**
 * Testing SnakeYAML.
 *
 * @author Hank Gay
 */
public final class Foo {
    public static void main(final String[] args) throws Exception {
        final Yaml yaml = new Yaml();
        Reader reader = null;
        try {
            reader = new FileReader("/tmp/foo.yaml");
            System.out.println(yaml.load(reader));
        } catch (final FileNotFoundException fnfe) {
            System.err.println("We had a problem reading the YAML from the file because we couldn't find the file." + fnfe);
        } finally {
            if (null != reader) {
                try {
                    reader.close();
                } catch (final IOException ioe) {
                    System.err.println("We got the following exception trying to clean up the reader: " + ioe);
                }
            }
        }
    }
}

Upvotes: 1

Views: 5401

Answers (2)

Andrey
Andrey

Reputation: 3001

fixed in release 1.0rc1

All Java 6 dependencies are removed from SnakeYAML.

Upvotes: 2

Olivier
Olivier

Reputation: 1232

Seems like a JDK version issue: LinkedList#push was introduced in Java 6.

Try setting JAVA_HOME to the correct version before running Maven.

Upvotes: 3

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