/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.loader.module;
import java.util.ArrayList;
import java.util.Collections;
import com.caucho.loader.Environment;
import com.caucho.loader.EnvironmentClassLoader;
import com.caucho.loader.EnvironmentLocal;
/**
* A jar artifact in the repository
*/
public class ArtifactRepository
{
private static final EnvironmentLocal<ArtifactRepository> _local
= new EnvironmentLocal<ArtifactRepository>();
private ArtifactRepository _parent;
private EnvironmentClassLoader _loader;
private ArrayList<ArtifactResolver> _resolverList
= new ArrayList<ArtifactResolver>();
private ArtifactRepository(EnvironmentClassLoader loader)
{
_loader = loader;
if (loader != null) {
EnvironmentClassLoader parentLoader
= Environment.getEnvironmentClassLoader(loader.getParent());
if (parentLoader != null && parentLoader != loader)
_parent = create(parentLoader);
}
}
public static ArtifactRepository create()
{
return create(Thread.currentThread().getContextClassLoader());
}
public static ArtifactRepository create(ClassLoader loader)
{
synchronized (_local) {
ArtifactRepository repository = _local.getLevel(loader);
if (repository == null) {
ClassLoader parentLoader = null;
if (loader != null)
parentLoader = loader.getParent();
EnvironmentClassLoader envLoader
= Environment.getEnvironmentClassLoader(parentLoader);
repository = new ArtifactRepository(envLoader);
_local.set(repository);
}
return repository;
}
}
public static ArtifactRepository getCurrent()
{
return _local.get();
}
public void addResolver(ArtifactResolver resolver)
{
_resolverList.add(resolver);
}
public ArrayList<Artifact> resolve(ArtifactDependency dependency)
{
ArrayList<ArtifactDependency> peers = new ArrayList<ArtifactDependency>();
return resolve(dependency, peers);
}
public ArrayList<Artifact> resolve(ArtifactDependency dependency,
ArtifactDependency []peerDependencyList)
{
ArrayList<ArtifactDependency> peers = new ArrayList<ArtifactDependency>();
for (ArtifactDependency peer : peerDependencyList)
peers.add(peer);
return resolve(dependency, peers);
}
public ArrayList<Artifact> resolve(ArtifactDependency dependency,
ArrayList<ArtifactDependency> peerDependencyList)
{
ArrayList<Artifact> artifactList = new ArrayList<Artifact>();
resolve(artifactList, dependency);
ArrayList<ArtifactDependency> peerDeps
= resolvePeer(dependency, peerDependencyList);
ArrayList<Artifact> filteredArtifactList = new ArrayList<Artifact>();
for (Artifact artifact : artifactList) {
if (isValid(artifact, peerDeps)) {
filteredArtifactList.add(artifact);
}
}
if (filteredArtifactList.size() > 0)
artifactList = filteredArtifactList;
Collections.sort(artifactList);
Collections.reverse(artifactList);
return artifactList;
}
private boolean isValid(Artifact artifact,
ArrayList<ArtifactDependency> dependencyList)
{
for (ArtifactDependency dep : dependencyList) {
if (! artifact.isMatch(dep))
return false;
}
return true;
}
protected void resolve(ArrayList<Artifact> artifactList,
ArtifactDependency dependency)
{
if (_parent != null)
_parent.resolve(artifactList, dependency);
for (ArtifactResolver resolver : _resolverList)
resolver.resolve(artifactList, dependency);
}
protected ArrayList<ArtifactDependency>
resolvePeer(ArtifactDependency dependency,
ArrayList<ArtifactDependency> peerList)
{
ArrayList<ArtifactDependency> commonDeps
= new ArrayList<ArtifactDependency>();
for (ArtifactDependency peer : peerList) {
if (peer == dependency)
continue;
ArrayList<Artifact> peerArtifacts = resolve(peer);
for (Artifact peerArtifact : peerArtifacts) {
for (ArtifactDependency peerDependency
: peerArtifact.getDependencies()) {
if (peerDependency.isSameArtifact(dependency)) {
commonDeps.add(peerDependency);
}
}
}
}
return commonDeps;
}
@Override
public String toString()
{
return (getClass().getSimpleName() + "[" + _loader + "]");
}
}