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package act.app;
/*-
* #%L
* ACT Framework
* %%
* Copyright (C) 2014 - 2017 ActFramework
* %%
* 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.
* #L%
*/
import act.Act;
import act.internal.util.AppDescriptor;
import org.osgl.$;
import org.osgl.logging.L;
import org.osgl.logging.Logger;
import org.osgl.util.C;
import org.osgl.util.E;
import org.osgl.util.IO;
import org.osgl.util.Iterators;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Properties;
/**
* Scan file system and construct {@link App} instances
*/
public class AppScanner {
private static Logger logger = L.get(AppScanner.class);
public static AppScanner DEF_SCANNER = new AppScanner();
public static AppScanner SINGLE_APP_SCANNER = new SingleAppScanner();
private final Map<String, ProjectLayoutProbe> buildFileProbeMap = C.newMap();
private final List<ProjectLayoutProbe> projectLayoutProbes = C.newList();
protected AppScanner() {
}
public AppScanner register(ProjectLayoutProbe probe) {
if (probe instanceof BuildFileProbe) {
buildFileProbeMap.put(((BuildFileProbe) probe).buildFileName(), probe);
} else {
projectLayoutProbes.add(probe);
}
return this;
}
public int test_probeCnt() {
return buildFileProbeMap.size() + projectLayoutProbes.size();
}
void scan(AppDescriptor descriptor, $.Func1<App, ?> callback) {
File[] appBases = appBases();
int size = appBases.length;
for (int i = 0; i < size; ++i) {
File appBase = appBases[i];
scan(descriptor, appBase, callback);
}
}
protected File[] appBases() {
File appBase = Act.conf().appBase();
return appBase.listFiles();
}
private void scan(AppDescriptor descriptor, File appBase, $.Func1<App, ?> callback) {
App app;
ProjectLayout layout = probe(appBase);
if (null == layout && !Act.isDev()) {
layout = ProjectLayout.PredefinedLayout.PKG;
}
if (null != layout) {
app = App.create(appBase, descriptor.getVersion(), layout);
if (null != descriptor.getAppName()) {
app.name(descriptor.getAppName());
}
callback.apply(app);
} else {
logger.warn("%s is not a valid app base", appBase.getPath());
}
}
private ProjectLayout probe(File appBase) {
ProjectLayout layout = probeLayoutPropertiesFile(appBase);
if (null != layout) {
return layout;
}
layout = probeLayoutPlugin(appBase);
if (null != layout) {
return layout;
}
return probeDefaultLayouts(appBase);
}
private ProjectLayout probeLayoutPlugin(File appBase) {
Iterator<ProjectLayoutProbe> probes = pluginProbes();
while (probes.hasNext()) {
ProjectLayoutProbe probe = probes.next();
ProjectLayout layout = probe.probe(appBase);
if (null != layout) {
return layout;
}
}
return null;
}
private ProjectLayout probeDefaultLayouts(File appBase) {
ProjectLayout[] predefined = ProjectLayout.PredefinedLayout.values();
for (int i = predefined.length - 1; i >= 0; --i) {
ProjectLayout layout = predefined[i];
if (ProjectLayout.util.probeAppBase(appBase, layout)) {
return layout;
}
}
return null;
}
private ProjectLayout probeLayoutPropertiesFile(File appBase) {
File f = new File(appBase, ProjectLayout.PROJ_LAYOUT_FILE);
if (f.exists() && f.canRead()) {
Properties p = new Properties();
InputStream is = IO.is(f);
try {
p.load(is);
} catch (IOException e) {
throw E.ioException(e);
} finally {
IO.close(is);
}
return ProjectLayout.util.build(p);
} else {
return null;
}
}
private Iterator<ProjectLayoutProbe> pluginProbes() {
return Iterators.composite(buildFileProbeMap.values().iterator(), projectLayoutProbes.iterator());
}
}