/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

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 */

package com.sun.tools.internal.xjc.reader;

import java.io.File;

import java.io.IOException;

import java.net.MalformedURLException;

import java.net.URL;

import org.xml.sax.InputSource;

public class Util

{

    /**

     * Parses the specified string either as an {@link URL} or as a {@link File}.

     *

     * @throws IOException

     *      if the parameter is neither.

     */

    public static Object getFileOrURL(String fileOrURL) throws IOException {

        try {

            return new URL(fileOrURL);

        } catch (MalformedURLException e) {

            return new File(fileOrURL).getCanonicalFile();

        }

    }

    /**

     * Gets an InputSource from a string, which contains either

     * a file name or an URL.

     */

    public static InputSource getInputSource(String fileOrURL) {

        try {

            Object o = getFileOrURL(fileOrURL);

            if(o instanceof URL) {

                return new InputSource(escapeSpace(((URL)o).toExternalForm()));

            } else {

                String url = ((File)o).toURL().toExternalForm();

                return new InputSource(escapeSpace(url));

            }

        } catch (IOException e) {

            return new InputSource(fileOrURL);

        }

    }

    public static String escapeSpace( String url ) {

        // URLEncoder didn't work.

        StringBuffer buf = new StringBuffer();

        for (int i = 0; i < url.length(); i++) {

            // TODO: not sure if this is the only character that needs to be escaped.

            if (url.charAt(i) == ' ')

                buf.append("%20");

            else

                buf.append(url.charAt(i));

        }

        return buf.toString();

    }

}