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/*******************************************************************************
* Copyright (c) 2009, 2019 Mountainminds GmbH & Co. KG and Contributors
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Marc R. Hoffmann - initial API and implementation
*
*******************************************************************************/
package org.jacoco.cli.internal;
import java.util.AbstractList;
import org.jacoco.cli.internal.commands.AllCommands;
import org.kohsuke.args4j.CmdLineException;
import org.kohsuke.args4j.CmdLineParser;
import org.kohsuke.args4j.OptionDef;
import org.kohsuke.args4j.spi.Messages;
import org.kohsuke.args4j.spi.OptionHandler;
import org.kohsuke.args4j.spi.Parameters;
import org.kohsuke.args4j.spi.Setter;
/**
* {@link OptionHandler} which uses {@link CommandParser} internally to provide
* help context also for sub-commands.
*/
public class CommandHandler extends OptionHandler<Command> {
/**
* This constructor is required by the args4j framework.
*
* @param parser
* @param option
* @param setter
*/
public CommandHandler(final CmdLineParser parser, final OptionDef option,
final Setter<Object> setter) {
super(parser,
new OptionDef(AllCommands.names(), "<command>",
option.required(), option.help(), option.hidden(),
CommandHandler.class, option.isMultiValued()) {
}, setter);
}
@Override
public int parseArguments(final Parameters params) throws CmdLineException {
final String subCmd = params.getParameter(0);
for (final Command c : AllCommands.get()) {
if (c.name().equals(subCmd)) {
parseSubArguments(c, params);
setter.addValue(c);
return params.size(); // consume all the remaining tokens
}
}
throw new CmdLineException(owner,
Messages.ILLEGAL_OPERAND.format(option.toString(), subCmd));
}
private void parseSubArguments(final Command c, final Parameters params)
throws CmdLineException {
final CmdLineParser p = new CommandParser(c);
p.parseArgument(new AbstractList<String>() {
@Override
public String get(final int index) {
try {
return params.getParameter(index + 1);
} catch (final CmdLineException e) {
// invalid index was accessed.
throw new IndexOutOfBoundsException();
}
}
@Override
public int size() {
return params.size() - 1;
}
});
}
@Override
public String getDefaultMetaVariable() {
return "<command>";
}
}
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