private synchronized ClassRealm getMavenRealm() {
if (mavenRealm == null) {
mavenRealm = newRealm("maven.api");
importMavenApi(mavenRealm);
mavenRealm.setParentClassLoader(ClassLoader.getSystemClassLoader());
List<ClassRealmManagerDelegate> delegates = getDelegates();
if (!delegates.isEmpty()) {
List<ClassRealmConstituent> constituents = new ArrayList<ClassRealmConstituent>();
ClassRealmRequest request =
new DefaultClassRealmRequest(
RealmType.Core, null, new ArrayList<String>(), constituents);
for (ClassRealmManagerDelegate delegate : delegates) {
delegate.setupRealm(mavenRealm, request);
}
populateRealm(mavenRealm, constituents);
}
}
return mavenRealm;
}
/**
* Creates a new class realm with the specified parent and imports.
*
* @param baseRealmId The base id to use for the new realm, must not be {@code null}.
* @param type The type of the class realm, must not be {@code null}.
* @param parent The parent realm for the new realm, may be {@code null} to use the Maven core
* realm.
* @param imports The packages/types to import from the parent realm, may be {@code null}.
* @param artifacts The artifacts to add to the realm, may be {@code null}. Unresolved artifacts
* (i.e. with a missing file) will automatically be excluded from the realm.
* @return The created class realm, never {@code null}.
*/
private ClassRealm createRealm(
String baseRealmId,
RealmType type,
ClassLoader parent,
List<String> imports,
boolean importXpp3Dom,
List<Artifact> artifacts) {
Set<String> artifactIds = new LinkedHashSet<String>();
List<ClassRealmConstituent> constituents = new ArrayList<ClassRealmConstituent>();
if (artifacts != null) {
for (Artifact artifact : artifacts) {
artifactIds.add(getId(artifact));
if (artifact.getFile() != null) {
constituents.add(new ArtifactClassRealmConstituent(artifact));
}
}
}
if (imports != null) {
imports = new ArrayList<String>(imports);
} else {
imports = new ArrayList<String>();
}
ClassRealm classRealm = newRealm(baseRealmId);
if (parent != null) {
classRealm.setParentClassLoader(parent);
} else {
classRealm.setParentRealm(getMavenRealm());
}
List<ClassRealmManagerDelegate> delegates = getDelegates();
if (!delegates.isEmpty()) {
ClassRealmRequest request = new DefaultClassRealmRequest(type, parent, imports, constituents);
for (ClassRealmManagerDelegate delegate : delegates) {
delegate.setupRealm(classRealm, request);
}
}
if (importXpp3Dom) {
importXpp3Dom(classRealm);
}
if (!imports.isEmpty()) {
ClassLoader importedRealm = classRealm.getParentClassLoader();
if (logger.isDebugEnabled()) {
logger.debug("Importing packages into class realm " + classRealm.getId());
}
for (String imp : imports) {
if (logger.isDebugEnabled()) {
logger.debug(" Imported: " + imp);
}
classRealm.importFrom(importedRealm, imp);
}
}
Set<String> includedIds = populateRealm(classRealm, constituents);
if (logger.isDebugEnabled()) {
artifactIds.removeAll(includedIds);
for (String id : artifactIds) {
logger.debug(" Excluded: " + id);
}
}
return classRealm;
}
