org.codehaus.groovy.tools.shell.util.XmlCommandRegistrar.groovy Maven / Gradle / Ivy
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Groovy: A powerful, dynamic language for the JVM
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.codehaus.groovy.tools.shell.util
import org.codehaus.groovy.tools.shell.Command
import org.codehaus.groovy.tools.shell.Shell
/**
* Registers {@link Command} classes from an XML file like:
*
*
{@literal
org.codehaus.groovy.tools.shell.commands.HelpCommand
org.codehaus.groovy.tools.shell.commands.ExitCommand
org.codehaus.groovy.tools.shell.commands.ImportCommand
org.codehaus.groovy.tools.shell.commands.DisplayCommand
org.codehaus.groovy.tools.shell.commands.ClearCommand
org.codehaus.groovy.tools.shell.commands.ShowCommand
org.codehaus.groovy.tools.shell.commands.InspectCommand
org.codehaus.groovy.tools.shell.commands.PurgeCommand
org.codehaus.groovy.tools.shell.commands.EditCommand
org.codehaus.groovy.tools.shell.commands.LoadCommand
org.codehaus.groovy.tools.shell.commands.SaveCommand
org.codehaus.groovy.tools.shell.commands.RecordCommand
org.codehaus.groovy.tools.shell.commands.HistoryCommand
org.codehaus.groovy.tools.shell.commands.AliasCommand
org.codehaus.groovy.tools.shell.commands.SetCommand
org.codehaus.groovy.tools.shell.commands.ShadowCommand
org.codehaus.groovy.tools.shell.commands.RegisterCommand
org.codehaus.groovy.tools.shell.commands.DocCommand
* }
*
*
* @author Jason Dillon
*/
class XmlCommandRegistrar
{
private final Logger log = Logger.create(this.class)
private final Shell shell
private final ClassLoader classLoader
XmlCommandRegistrar(final Shell shell, final ClassLoader classLoader) {
assert shell != null
assert classLoader != null
this.shell = shell
this.classLoader = classLoader
}
void register(final URL url) {
assert url
if (log.debugEnabled) {
log.debug("Registering commands from: $url")
}
url.withReader {Reader reader ->
groovy.util.Node doc = new groovy.util.XmlParser().parse(reader)
doc.children().each {groovy.util.Node element ->
String classname = element.text()
Class type = classLoader.loadClass(classname)
Command command = type.newInstance(shell) as Command
if (log.debugEnabled) {
log.debug("Created command '${command.name}': $command")
}
shell << command
}
}
}
}