This article from Peter Grund describes how to use Maven directly in Java. Recently I looked for an analog way to resolute and download Maven repository artifacts. But I wanted to use Ivy. The following example shows how to embed and use Ivy directy in Java.
1. Add Ivy dependenvy to pom.xml:
org.apache.ivy ivy 2.2.0
2. Java code to resolve and download artifacts:
public class IvyArtifactResolver {
public File resolveArtifact(String groupId, String artifactId, String version) throws Exception {
//creates clear ivy settings
IvySettings ivySettings = new IvySettings();
//url resolver for configuration of maven repo
URLResolver resolver = new URLResolver();
resolver.setM2compatible(true);
resolver.setName("central");
//you can specify the url resolution pattern strategy
resolver.addArtifactPattern(
"http://repo1.maven.org/maven2/"
+ "[organisation]/[module]/[revision]/[artifact](-[revision]).[ext]");
//adding maven repo resolver
ivySettings.addResolver(resolver);
//set to the default resolver
ivySettings.setDefaultResolver(resolver.getName());
//creates an Ivy instance with settings
Ivy ivy = Ivy.newInstance(ivySettings);
File ivyfile = File.createTempFile("ivy", ".xml");
ivyfile.deleteOnExit();
String[] dep = null;
dep = new String[]{groupId, artifactId, version};
DefaultModuleDescriptor md =
DefaultModuleDescriptor.newDefaultInstance(ModuleRevisionId.newInstance(dep[0],
dep[1] + "-caller", "working"));
DefaultDependencyDescriptor dd = new DefaultDependencyDescriptor(md,
ModuleRevisionId.newInstance(dep[0], dep[1], dep[2]), false, false, true);
md.addDependency(dd);
//creates an ivy configuration file
XmlModuleDescriptorWriter.write(md, ivyfile);
String[] confs = new String[]{"default"};
ResolveOptions resolveOptions = new ResolveOptions().setConfs(confs);
//init resolve report
ResolveReport report = ivy.resolve(ivyfile.toURL(), resolveOptions);
//so you can get the jar library
File jarArtifactFile = report.getAllArtifactsReports()[0].getLocalFile();
return jarArtifactFile;
}
Regards
Rafael Sobek
Technorati Tags: Ivy Ivy in Java Maven Artifact Dependency Resolution
Thanks, Rafael, it helped me in my project. I saw the code is mostly taken from Ivy command-line main() - I'm surprised one needs to write temp "ivy.xml" to disk and read it back rather than use an API, but it's a minor drawback which I can live with
Reposted it at makandracards: http://goo.gl/fPb1t.