/*
 * Copyright (c) 2012-2014 Spotify AB
 *
 * Licensed 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 com.spotify.logging.logback;

import ch.qos.logback.classic.spi.ILoggingEvent;
import ch.qos.logback.core.filter.Filter;
import ch.qos.logback.core.spi.FilterReply;
import ch.qos.logback.classic.Level;

/**
 * Comparable to ch.qos.logback.classic.filter.ThresholdFilter, but for a specific logger.
 * Filters out events for the given logger (and its children) below the threshold level;
 * events for all other loggers are neutral.
 */
public class LoggerThresholdFilter extends Filter<ILoggingEvent> {

    private String logger;
    private Level level;
    private String exceptLogger;

    @Override
    public FilterReply decide(ILoggingEvent event) {
        if(!isStarted())
            return FilterReply.NEUTRAL;

        if(logger != null && !event.getLoggerName().startsWith(logger))
            return FilterReply.NEUTRAL;

        if(exceptLogger != null && event.getLoggerName().startsWith(exceptLogger))
            return FilterReply.NEUTRAL;

        if(level != null && !event.getLevel().isGreaterOrEqual(level))
            return FilterReply.DENY;

        return FilterReply.NEUTRAL;
    }

    public void setLogger(String logger) {
        this.logger = logger;
    }

    public void setLevel(Level level) {
        this.level = level;
    }

    public void setExceptLogger(String exceptLogger) {
        this.exceptLogger = exceptLogger;
    }
}