/**
* Logback: the reliable, generic, fast and flexible logging framework.
* Copyright (C) 1999-2015, QOS.ch. All rights reserved.
*
* This program and the accompanying materials are dual-licensed under
* either the terms of the Eclipse Public License v1.0 as published by
* the Eclipse Foundation
*
* or (per the licensee's choosing)
*
* under the terms of the GNU Lesser General Public License version 2.1
* as published by the Free Software Foundation.
*/
package ch.qos.logback.core.pattern.color;
import ch.qos.logback.core.pattern.CompositeConverter;
import static ch.qos.logback.core.pattern.color.ANSIConstants.*;
/**
* Base class for all foreground color setting composite converters.
*
* @param <E>
* @since 1.0.5
*/
abstract public class ForegroundCompositeConverterBase<E> extends CompositeConverter<E> {
final private static String SET_DEFAULT_COLOR = ESC_START + "0;" + DEFAULT_FG + ESC_END;
@Override
protected String transform(E event, String in) {
StringBuilder sb = new StringBuilder();
sb.append(ESC_START);
sb.append(getForegroundColorCode(event));
sb.append(ESC_END);
sb.append(in);
sb.append(SET_DEFAULT_COLOR);
return sb.toString();
}
/**
* Derived classes return the foreground color specific to the derived class instance.
* @return the foreground color for this instance
*/
abstract protected String getForegroundColorCode(E event);
}