/*
* Copyright 2014 Red Hat Inc. and/or its affiliates and other contributors.
*
* 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 org.switchyard.deploy.karaf;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.regex.Pattern;
import org.apache.felix.service.command.CommandSession;
import org.apache.karaf.shell.console.Completer;
import org.apache.karaf.shell.console.completer.ArgumentCompleter;
import org.apache.karaf.shell.console.completer.StringsCompleter;
import org.apache.karaf.shell.console.jline.CommandSessionHolder;
import org.switchyard.admin.Application;
import org.switchyard.admin.Service;
import org.switchyard.admin.SwitchYard;
/**
* Generates completion set for Application arguments.
*/
public class ServiceNameCompleter implements Completer {
private SwitchYard _switchYard;
private Integer _applicationArgumentIndex;
private String[] _applicationOptions;
private Set<String> _optionsWithParameters = Collections.emptySet();
@Override
public int complete(String buffer, int cursor, List<String> candidates) {
final StringsCompleter delegate = new StringsCompleter();
final Pattern applicationNamePattern = getApplicationNamePattern();
final List<Application> applications = _switchYard.getApplications();
for (Application application : applications) {
if (applicationNamePattern.matcher(application.getName().toString()).find()) {
for (Service service : application.getServices()) {
delegate.getStrings().add(service.getName().toString());
}
}
}
return delegate.complete(buffer, cursor, candidates);
}
/**
* @param switchYard the SwitchYard admin service
*/
public void setSwitchYard(SwitchYard switchYard) {
_switchYard = switchYard;
}
/**
* @param applicationArgumentIndex the index for the application argument
*/
public void setApplicationArgumentIndex(Integer applicationArgumentIndex) {
_applicationArgumentIndex = applicationArgumentIndex;
}
/**
* @param applicationOptions option strings for application name
*/
public void setApplicationOptions(String[] applicationOptions) {
_applicationOptions = applicationOptions;
}
/**
* @param optionsWithParameters option strings which require parameters
*/
public void setOptionsWithParameters(String[] optionsWithParameters) {
if (optionsWithParameters == null) {
_optionsWithParameters = Collections.emptySet();
} else {
_optionsWithParameters = new HashSet<String>(Arrays.asList(optionsWithParameters));
}
}
private Pattern getApplicationNamePattern() {
final CommandSession session = CommandSessionHolder.getSession();
if (session == null) {
return compilePattern(null, false);
}
final ArgumentCompleter.ArgumentList argList = (ArgumentCompleter.ArgumentList) session
.get(ArgumentCompleter.ARGUMENTS_LIST);
if (argList == null || argList.getArguments() == null || argList.getArguments().length == 0) {
return compilePattern(null, false);
}
final List<String> arguments = Arrays.asList(argList.getArguments());
boolean isRegex = arguments.indexOf("--regex") > 0;
if (_applicationArgumentIndex == null) {
if (_applicationOptions == null || _applicationOptions.length == 0) {
return compilePattern(null, false);
}
for (String option : _applicationOptions) {
final int index = arguments.indexOf(option);
if (index >= 0) {
if (arguments.size() - 1 > index) {
// XXX: do we need to worry about commas delimiting a
// list?
return compilePattern(Collections.singletonList(arguments.get(index + 1)), isRegex);
}
}
}
} else {
int argumentOffset = 1; // command is first argument
for (int index = 0, count = arguments.size(); index < count; ++index) {
if (arguments.get(index).startsWith("-")) {
argumentOffset = index;
if (_optionsWithParameters.contains(arguments.get(index))) {
++argumentOffset;
}
}
}
// XXX: assuming the last option does not accept a value here
if (_applicationArgumentIndex + argumentOffset < arguments.size()) {
return compilePattern(
Collections.singletonList(arguments.get(_applicationArgumentIndex + argumentOffset)), isRegex);
}
}
return compilePattern(null, false);
}
private Pattern compilePattern(List<String> patterns, boolean isRegex) {
if (patterns == null || patterns.size() == 0) {
patterns = Collections.singletonList(".*");
isRegex = true;
}
final StringBuffer regex = new StringBuffer();
for (String name : patterns) {
if (!isRegex) {
regex.append("\\Q");
}
regex.append(name);
if (!isRegex) {
regex.append("\\E");
}
regex.append('|');
}
regex.deleteCharAt(regex.length() - 1);
return Pattern.compile(regex.toString());
}
}