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/*
* Copyright 2000-2009 JetBrains s.r.o.
*
* 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 com.intellij.openapi.vcs.impl;
import com.intellij.lifecycle.PeriodicalTasksCloser;
import com.intellij.openapi.components.BaseComponent;
import com.intellij.openapi.diagnostic.Logger;
import com.intellij.openapi.extensions.AbstractExtensionPointBean;
import com.intellij.openapi.extensions.ExtensionPointName;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.vcs.AbstractVcs;
import com.intellij.openapi.vcs.VcsActiveEnvironmentsProxy;
import com.intellij.util.xmlb.annotations.Attribute;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
/**
* @author yole
*/
public class VcsEP extends AbstractExtensionPointBean {
private static final Logger LOG = Logger.getInstance("#com.intellij.openapi.vcs.impl.VcsEP");
public static final ExtensionPointName<VcsEP> EP_NAME = ExtensionPointName.create("com.intellij.vcs");
// these must be public for scrambling compatibility
@Attribute("name")
public String name;
@Attribute("vcsClass")
public String vcsClass;
@Attribute("displayName")
public String displayName;
@Attribute("administrativeAreaName")
public String administrativeAreaName;
@Attribute("crawlUpToCheckUnderVcs")
public boolean crawlUpToCheckUnderVcs;
private AbstractVcs myVcs;
private final Object LOCK = new Object();
@Nullable
public AbstractVcs getVcs(@NotNull Project project) {
synchronized (LOCK) {
if (myVcs != null) {
return myVcs;
}
}
AbstractVcs vcs = getInstance(project, vcsClass);
synchronized (LOCK) {
if (myVcs == null) {
myVcs = VcsActiveEnvironmentsProxy.proxyVcs(vcs);
}
return myVcs;
}
}
@Nullable
private AbstractVcs getInstance(@NotNull Project project, @NotNull String vcsClass) {
try {
final Class<? extends AbstractVcs> foundClass = findClass(vcsClass);
final Class<?>[] interfaces = foundClass.getInterfaces();
for (Class<?> anInterface : interfaces) {
if (BaseComponent.class.isAssignableFrom(anInterface)) {
return PeriodicalTasksCloser.getInstance().safeGetComponent(project, foundClass);
}
}
return instantiate(vcsClass, project.getPicoContainer());
}
catch(Exception e) {
LOG.error(e);
return null;
}
}
@NotNull
public VcsDescriptor createDescriptor() {
return new VcsDescriptor(administrativeAreaName, displayName, name, crawlUpToCheckUnderVcs);
}
}
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