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CliDispatcher.java
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package act.cli;
/*-
* #%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.app.App;
import act.app.AppServiceBase;
import act.cli.builtin.Exit;
import act.cli.builtin.Help;
import act.cli.builtin.IterateCursor;
import act.cli.meta.CommandMethodMetaInfo;
import act.cli.meta.CommanderClassMetaInfo;
import act.handler.CliHandler;
import act.handler.builtin.cli.CliHandlerProxy;
import org.osgl.Osgl;
import org.osgl.logging.LogManager;
import org.osgl.logging.Logger;
import org.osgl.util.C;
import org.osgl.util.E;
import org.osgl.util.S;
import java.util.List;
import java.util.Map;
/**
* Dispatch console command to CLI command handler
*/
public class CliDispatcher extends AppServiceBase<CliDispatcher> {
private static Logger logger = LogManager.get(CliDispatcher.class);
private static final String NAME_PART_SEPARATOR = "[\\.\\-_]+";
private Map<String, CliHandler> registry = C.newMap();
private Map<String, String> shortCuts = C.newMap();
private Map<String, List<CliHandler>> ambiguousShortCuts = C.newMap();
private Map<CliHandler, List<String>> nameMap = C.newMap();
private Map<CliHandler, List<String>> shortCutMap = C.newMap();
public CliDispatcher(App app) {
super(app);
registerBuiltInHandlers();
}
public CliDispatcher registerCommandHandler(String command, CommandMethodMetaInfo methodMetaInfo, CommanderClassMetaInfo classMetaInfo) {
String sa[] = command.split(CommanderClassMetaInfo.NAME_SEPARATOR);
for (String s : sa) {
if (registry.containsKey(s)) {
throw E.invalidConfiguration("Command %s already registered", command);
}
addToRegistry(s, new CliHandlerProxy(classMetaInfo, methodMetaInfo, app()));
logger.debug("Command registered: %s", s);
}
return this;
}
public boolean registered(String command) {
return registry.containsKey(command);
}
public CliHandler handler(String command) {
String command0 = command;
command = shortCuts.get(command);
if (null == command) {
command = command0;
}
CliHandler handler = registry.get(command);
if (null == handler && !command.startsWith("act.")) {
handler = registry.get("act." + command);
}
Act.Mode mode = Act.mode();
if (null != handler && handler.appliedIn(mode)) {
return handler;
}
return null;
}
/**
* Returns a list of system commands in alphabetic order
*
* @return the system command list
*/
public List<String> systemCommands() {
return commands(true, false);
}
/**
* Returns a list of application commands in alphabetic order
*
* @return the application command list
*/
public List<String> applicationCommands() {
return commands(false, true);
}
/**
* Returns all commands in alphabetic order
*
* @return the list of commands
*/
public List<String> commands(boolean sys, boolean app) {
C.List<String> list = C.newList();
Act.Mode mode = Act.mode();
boolean all = !sys && !app;
for (String s : registry.keySet()) {
boolean isSysCmd = s.startsWith("act.");
if (isSysCmd && !sys && !all) {
continue;
}
if (!isSysCmd && !app && !all) {
continue;
}
CliHandler h = registry.get(s);
if (h.appliedIn(mode)) {
list.add(s);
}
}
return list.sorted(new Osgl.Comparator<String>() {
@Override
public int compare(String o1, String o2) {
boolean b1 = (o1.startsWith("act."));
boolean b2 = (o2.startsWith("act."));
if (b1 & !b2) {
return -1;
}
if (!b1 & b2) {
return 1;
}
return o1.compareTo(o2);
}
});
}
public List<String> names(CliHandler handler) {
return nameMap.get(handler);
}
public List<String> shortCuts(CliHandler handler) {
return shortCutMap.get(handler);
}
@Override
protected void releaseResources() {
registry.clear();
}
private void addToRegistry(String name, CliHandler handler) {
registry.put(name, handler);
Help.updateMaxWidth(name.length());
updateNameIndex(name, handler);
registerShortCut(name, handler);
}
private void updateNameIndex(String name, CliHandler handler) {
List<String> nameList = nameMap.get(handler);
if (null == nameList) {
nameList = C.newList();
nameMap.put(handler, nameList);
}
nameList.add(name);
}
private void registerShortCut(String name, CliHandler handler) {
List<String> shortCutNames = shortCutMap.get(handler);
if (null == shortCutNames) {
shortCutNames = C.newList();
shortCutMap.put(handler, shortCutNames);
}
for (int i = 0; i < 5; ++i) {
String shortCut = shortCut(name, i);
if (null == shortCut) {
continue;
}
if (ambiguousShortCuts.containsKey(shortCut)) {
List<CliHandler> list = ambiguousShortCuts.get(shortCut);
list.add(handler);
} else if (shortCuts.containsKey(shortCut)) {
shortCuts.remove(shortCut);
List<CliHandler> list = C.newList();
ambiguousShortCuts.put(shortCut, list);
for (List<String> ls : shortCutMap.values()) {
ls.remove(shortCut);
}
} else {
shortCuts.put(shortCut, name);
shortCutNames.add(shortCut);
}
}
}
/**
* level:
*
* 0 - "foo.bar.zee" -> ".fbz"
* 1 - "foo.bar.zee" -> "f.b.z"
* 2 - "foo.bar.zee" -> "f.b.zee"
* 3 - "foo.bar.zee" -> "f.bar.z"
* 4 - "foo.bar.zee" -> "fo.ba.ze"
*/
private static String shortCut(String name, int level) {
String sa[] = name.split(NAME_PART_SEPARATOR);
if (sa.length < 2) {
return null;
}
S.Buffer sb = S.buffer();
switch (level) {
case 0:
sb.append(".");
for (String s : sa) {
sb.append(s.charAt(0));
}
return sb.toString();
case 1:
for (String s : sa) {
sb.append(s.charAt(0)).append(".");
}
sb.deleteCharAt(sb.length() - 1);
return sb.toString();
case 2:
for (int i = 0; i < sa.length - 1; ++i) {
sb.append(sa[i].charAt(0)).append(".");
}
sb.append(sa[sa.length - 1]);
return sb.toString();
case 3:
for (int i = 0; i < sa.length - 2; ++i) {
sb.append(sa[i].charAt(0)).append(".");
}
sb.append(sa[sa.length - 2]).append(".");
sb.append(sa[sa.length - 1].charAt(0));
return sb.toString();
case 4:
for (String s : sa) {
sb.append(s.charAt(0));
if (s.length() > 1) {
sb.append(s.charAt(1));
}
sb.append(".");
}
sb.deleteCharAt(sb.length() - 1);
return sb.toString();
default:
throw E.unsupport();
}
}
private void registerBuiltInHandlers() {
addToRegistry("act.exit", Exit.INSTANCE);
addToRegistry("act.quit", Exit.INSTANCE);
addToRegistry("act.bye", Exit.INSTANCE);
addToRegistry("act.help", Help.INSTANCE);
addToRegistry("act.it", IterateCursor.INSTANCE);
}
}