/*
* Copyright 2011 Red Hat inc. and third party contributors as noted
* by the author tags.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package ceylon.modules.jboss.runtime;
import java.util.Collections;
import java.util.List;
import com.redhat.ceylon.cmr.api.ArtifactResult;
import org.jboss.modules.DependencySpec;
import org.jboss.modules.LocalLoader;
import org.jboss.modules.Module;
import org.jboss.modules.ModuleIdentifier;
import org.jboss.modules.ModuleLoadException;
import org.jboss.modules.Resource;
/**
* Load modules on demand.
*
* @author <a href="mailto:ales.justin@jboss.org">Ales Justin</a>
*/
class OnDemandLocalLoader implements LocalLoader {
private ModuleIdentifier target;
private CeylonModuleLoader loader;
private Node<ArtifactResult> root;
OnDemandLocalLoader(ModuleIdentifier target, CeylonModuleLoader loader, Node<ArtifactResult> root) {
this.target = target;
this.loader = loader;
this.root = root;
}
protected LocalLoader doUpdate(String[] tokens) {
Node<ArtifactResult> current = root;
for (String token : tokens) {
current = current.getChild(token);
if (current == null)
return null;
//noinspection SynchronizationOnLocalVariableOrMethodParameter
synchronized (current) {
ArtifactResult i = current.getValue();
if (i != null) {
current.remove(); // remove, so we don't loop; should not happen though
DependencySpec mds = loader.createModuleDependency(i);
try {
Module owner = loader.preloadModule(target);
loader.updateModule(owner, mds); // update / add lazy dep
Module module = loader.loadModule(CeylonModuleLoader.createModuleIdentifier(i));
return new ModuleLocalLoader(module);
} catch (ModuleLoadException ignored) {
return null;
}
}
}
}
return null;
}
public Class<?> loadClassLocal(String name, boolean resolve) {
String[] tokens = name.split("\\.");
LocalLoader ll = doUpdate(tokens);
return (ll != null ? ll.loadClassLocal(name, resolve) : null);
}
public List<Resource> loadResourceLocal(String name) {
String[] tokens = name.split("/");
LocalLoader ll = doUpdate(tokens);
return (ll != null ? ll.loadResourceLocal(name) : Collections.<Resource>emptyList());
}
public Package loadPackageLocal(String name) {
String[] tokens = name.split("\\.");
LocalLoader ll = doUpdate(tokens);
return (ll != null ? ll.loadPackageLocal(name) : null);
}
}