PatternClassNameTransformer.java

/*
 * Copyright (c) 2013 Farata Systems  http://www.faratasystems.com
 *
 * Licensed under The MIT License
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 * @license http://www.opensource.org/licenses/mit-license.php The MIT License
 */

package clear.cdb.support.template.xslt;

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

public class PatternClassNameTransformer implements INameTransformer {
    final private Pattern pattern;
    final private String replacement;

    public PatternClassNameTransformer(final String arguments) {
        final int separatorIdx = arguments.indexOf(SEPARATOR);
        if (separatorIdx >= 0) {
            replacement = arguments.substring(0, separatorIdx);
            final String patternText = arguments.substring(separatorIdx + SEPARATOR.length());
            if (patternText.length() > 0) {
                pattern = Pattern.compile(patternText);
            } else {
                pattern = IDENTITY_PATTERN;
            }
        } else {
            replacement = arguments + ".$1";
            pattern = IDENTITY_PATTERN;
        }
    }

    public PatternClassNameTransformer(final Pattern pattern, final String replacement) {
        this.pattern = pattern;
        this.replacement = replacement;
    }

    public String transform(final String originalName) {
        final Matcher matcher = pattern.matcher(originalName);
        if (matcher.matches()) {
            return matcher.replaceAll(replacement);
        } else {
            return originalName;
        }
    }


    final public static String SEPARATOR = "<<";
    final public static Pattern IDENTITY_PATTERN = Pattern.compile("^(.*)$");
}