it.cnr.icar.eric.client.admin.AdminShellUtility.java Source code

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Here is the source code for it.cnr.icar.eric.client.admin.AdminShellUtility.java

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/*
 * ====================================================================
 * This file is part of the ebXML Registry by Icar Cnr v3.2 
 * ("eRICv32" in the following disclaimer).
 *
 * "eRICv32" is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * "eRICv32" 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.
 *
 * You should have received a copy of the GNU General Public License Version 3
 * along with "eRICv32".  If not, see <http://www.gnu.org/licenses/>.
 *
 * eRICv32 is a forked, derivative work, based on:
 *    - freebXML Registry, a royalty-free, open source implementation of the ebXML Registry standard,
 *      which was published under the "freebxml License, Version 1.1";
 *   - ebXML OMAR v3.2 Edition, published under the GNU GPL v3 by S. Krushe & P. Arwanitis.
 * 
 * All derivative software changes and additions are made under
 *
 * Copyright (C) 2013 Ing. Antonio Messina <messina@pa.icar.cnr.it>
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the freebxml Software Foundation.  For more
 * information on the freebxml Software Foundation, please see
 * "http://www.freebxml.org/".
 *
 * This product includes software developed by the Apache Software
 * Foundation (http://www.apache.org/).
 *
 * ====================================================================
 */
package it.cnr.icar.eric.client.admin;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import java.util.regex.Pattern;
import java.util.regex.Matcher;

public class AdminShellUtility {
    private static final Log log = LogFactory.getLog(AdminShellUtility.class.getName());
    private static AdminShellUtility instance; //singleton instance

    protected AdminResourceBundle rb = AdminResourceBundle.getInstance();

    /** Creates a new instance of AdminShellFactory */
    protected AdminShellUtility() {
    }

    public synchronized static AdminShellUtility getInstance() {
        if (instance == null) {
            instance = new AdminShellUtility();
        }

        return instance;
    }

    public String normalizeArgs(String args) {
        /*
         * Pattern is choice of:
         *  - '"' (not preceded by '\') followed zero or more of:
         *     - Not a '"' or
         *     - '\"'
         *  - '"' that is preceded by '\'
         *  - Not a '"'
         */
        Pattern p = Pattern.compile("(?<!\\\\)\"(([^\"]|\\\\\")*)\"|(?<=\\\\)\"|[^\"]+");

        Matcher m = p.matcher(args);

        String matcherUseArgs = "";

        int prevEnd = 0;
        while (m.find()) {
            prevEnd = m.end();

            log.debug(rb.getString(AdminShell.ADMIN_SHELL_RESOURCES_PREFIX + "debug.group",
                    new Object[] { m.group() }));
            String quotedString = m.group(1);

            if (quotedString != null) {
                matcherUseArgs += quotedString.replaceAll(" ", "\\\\ ");
                log.debug(rb.getString(AdminShell.ADMIN_SHELL_RESOURCES_PREFIX + "debug.quoted",
                        new Object[] { quotedString.replaceAll(" ", "\\\\ ") }));
            } else {
                matcherUseArgs += m.group();
                log.debug(rb.getString(AdminShell.ADMIN_SHELL_RESOURCES_PREFIX + "debug.unquoted",
                        new Object[] { m.group() }));
            }
        }

        if (prevEnd < args.length()) {
            String remainder = args.substring(prevEnd);
            log.debug(rb.getString(AdminShell.ADMIN_SHELL_RESOURCES_PREFIX + "debug.remainder",
                    new Object[] { remainder }));

            if (remainder.matches(".*(?<!\\\\)\".*")) {
                log.debug(rb.getString(AdminShell.ADMIN_SHELL_RESOURCES_PREFIX + "unbalancedQuotes"));
            } else {
                matcherUseArgs += remainder;
            }
        }

        log.debug(rb.getString(AdminShell.ADMIN_SHELL_RESOURCES_PREFIX + "debug.matcher",
                new Object[] { matcherUseArgs }));

        String useArgs = args;

        String[] useArgsArray = useArgs.split("(?<=^|[^\\\\])\"", -1);

        useArgs = useArgsArray[0];

        if (log.isDebugEnabled()) {
            log.debug(args);

            for (int i = 0; i < useArgsArray.length; i++) {
                log.debug(useArgsArray[i] + ":");
            }
            log.debug("");
        }

        if ((useArgsArray.length > 1)) {
            // An even number of quotes results in an odd-number array length
            if (useArgsArray.length % 2 == 0) {
                log.error(rb.getString(AdminShell.ADMIN_SHELL_RESOURCES_PREFIX + "unbalancedQuotes"));
                return null;
            }

            for (int i = 1; i < useArgsArray.length; i += 2) {
                useArgsArray[i] = useArgsArray[i].replaceAll(" ", "\\\\ ");
            }

            for (int i = 1; i < useArgsArray.length; i++) {
                useArgs += useArgsArray[i];
            }
        }

        useArgs = useArgs.replaceAll("\\\\\"", "\"");
        useArgs = useArgs.replaceAll("\\\\ ", " ");

        if (log.isDebugEnabled()) {
            log.debug(":" + useArgs + ":");
        }

        return useArgs;
    }
}