/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.log4j.pattern;

/**
 *
 * Base class for other pattern converters which can return only parts of their
 * name.
 *
 * @author Ceki G&uuml;lc&uuml;
 * @author Curt Arnold
 *
 */
public abstract class NamePatternConverter extends LoggingEventPatternConverter {
    /**
     * Abbreviator.
     */
    private final NameAbbreviator abbreviator;

    /**
     * Constructor.
     * 
     * @param name    name of converter.
     * @param style   style name for associated output.
     * @param options options, may be null, first element will be interpreted as an
     *                abbreviation pattern.
     */
    protected NamePatternConverter(final String name, final String style, final String[] options) {
	super(name, style);

	if ((options != null) && (options.length > 0)) {
	    abbreviator = NameAbbreviator.getAbbreviator(options[0]);
	} else {
	    abbreviator = NameAbbreviator.getDefaultAbbreviator();
	}
    }

    /**
     * Abbreviate name in string buffer.
     * 
     * @param nameStart starting position of name to abbreviate.
     * @param buf       string buffer containing name.
     */
    protected final void abbreviate(final int nameStart, final StringBuffer buf) {
	abbreviator.abbreviate(nameStart, buf);
    }
}
