org.pentaho.platform.plugin.services.importexport.CmdParser.java Source code

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Here is the source code for org.pentaho.platform.plugin.services.importexport.CmdParser.java

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/*
 * This program is free software; you can redistribute it and/or modify it under the
 * terms of the GNU General Public License, version 2 as published by the Free Software
 * Foundation.
 *
 * You should have received a copy of the GNU General Public License along with this
 * program; if not, you can obtain a copy at http://www.gnu.org/licenses/gpl-2.0.html
 * or from the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 *
 *
 * Copyright 2006 - 2017 Pentaho Corporation.  All rights reserved.
 */

package org.pentaho.platform.plugin.services.importexport;

import org.apache.commons.cli.Option;
import org.apache.commons.cli.Options;
import org.apache.commons.cli.Parser;
import org.pentaho.platform.plugin.services.messages.Messages;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;

public class CmdParser extends Parser {

    private List<Object> tokens = new ArrayList<>();
    private boolean eatTheRest;
    private Option currentOption;
    private Options options;

    @Override
    protected String[] flatten(Options options, String[] arguments, boolean stopAtNonOption) {
        init();
        this.options = options;

        // an iterator for the command line tokens
        Iterator iter = Arrays.asList(arguments).iterator();

        // process each command line token
        while (iter.hasNext()) {
            // get the next command line token
            String token = (String) iter.next();

            // handle long option --foo or --foo=bar
            if (token.startsWith("--")) {
                handleToken(options, stopAtNonOption, token);
            } else if ("-".equals(token)) { // single hyphen
                tokens.add(token);
            } else if (token.startsWith("-")) {
                if (token.length() == 2 || options.hasOption(token)) {
                    processOptionToken(token, stopAtNonOption);
                } else {
                    handleToken(options, stopAtNonOption, token);
                }
            } else {
                processNonOptionToken(token, stopAtNonOption);
            }

            gobble(iter);
        }
        return (String[]) tokens.toArray(new String[tokens.size()]);
    }

    private void handleToken(Options options, boolean stopAtNonOption, String token) {
        int pos = token.indexOf('=');
        String opt = pos == -1 ? token : token.substring(0, pos); // --foo

        if (!options.hasOption(opt)) {
            processNonOptionToken(token, stopAtNonOption);
        } else {
            Option option = options.getOption(opt);
            boolean isLongOptAndExists = opt.startsWith("--")
                    && option.getLongOpt().equals(opt.substring(2, opt.length()));
            boolean isShortOptAndExists = opt.startsWith("-")
                    && option.getOpt().equals(opt.substring(1, opt.length()));
            if (isLongOptAndExists || isShortOptAndExists) {
                currentOption = option;
                tokens.add(opt);
                if (pos != -1) {
                    tokens.add(token.substring(pos + 1));
                }
            } else {
                throw new IllegalArgumentException(Messages.getInstance()
                        .getErrorString("CommandLineProcessor.ERROR_0008_INVALID_PARAMETER", opt));
            }
        }
    }

    private void init() {
        eatTheRest = false;
        tokens.clear();
    }

    private void processNonOptionToken(String value, boolean stopAtNonOption) {
        if (stopAtNonOption && (currentOption == null || !currentOption.hasArg())) {
            eatTheRest = true;
            tokens.add("--");
        }
        tokens.add(value);
    }

    private void processOptionToken(String token, boolean stopAtNonOption) {
        if (stopAtNonOption && !options.hasOption(token)) {
            eatTheRest = true;
        }
        if (options.hasOption(token)) {
            currentOption = options.getOption(token);
        }
        tokens.add(token);
    }

    private void gobble(Iterator iter) {
        if (eatTheRest) {
            while (iter.hasNext()) {
                tokens.add(iter.next());
            }
        }
    }
}