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.
/**
 * 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.
Type parameters:
<E> – 
Since:
1.0.5/**
 * 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.
Returns:
 the foreground color for this instance/**
     * 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);
}