/*
* 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.logging.log4j.core.filter;
import org.apache.logging.log4j.Level;
import org.apache.logging.log4j.Marker;
import org.apache.logging.log4j.core.LogEvent;
import org.apache.logging.log4j.core.Logger;
import org.apache.logging.log4j.core.config.plugins.Plugin;
import org.apache.logging.log4j.core.config.plugins.PluginAttr;
import org.apache.logging.log4j.core.config.plugins.PluginElement;
import org.apache.logging.log4j.core.config.plugins.PluginFactory;
import org.apache.logging.log4j.core.helpers.KeyValuePair;
import org.apache.logging.log4j.message.MapMessage;
import org.apache.logging.log4j.message.Message;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* A Filter that operates on a Map.
*/
@Plugin(name = "MapFilter", category = "Core", elementType = "filter", printObject = true)
public class MapFilter extends AbstractFilter {
private final Map<String, List<String>> map;
private final boolean isAnd;
protected MapFilter(final Map<String, List<String>> map, final boolean oper, final Result onMatch,
final Result onMismatch) {
super(onMatch, onMismatch);
if (map == null) {
throw new NullPointerException("key cannot be null");
}
this.isAnd = oper;
this.map = map;
}
@Override
public Result filter(final Logger logger, final Level level, final Marker marker, final Message msg,
final Throwable t) {
if (msg instanceof MapMessage) {
return filter(((MapMessage) msg).getData()) ? onMatch : onMismatch;
}
return Result.NEUTRAL;
}
@Override
public Result filter(final LogEvent event) {
final Message msg = event.getMessage();
if (msg instanceof MapMessage) {
return filter(((MapMessage) msg).getData()) ? onMatch : onMismatch;
}
return Result.NEUTRAL;
}
protected boolean filter(final Map<String, String> data) {
boolean match = false;
for (final Map.Entry<String, List<String>> entry : map.entrySet()) {
final String toMatch = data.get(entry.getKey());
if (toMatch != null) {
match = entry.getValue().contains(toMatch);
} else {
match = false;
}
if ((!isAnd && match) || (isAnd && !match)) {
break;
}
}
return match;
}
@Override
public String toString() {
final StringBuilder sb = new StringBuilder();
sb.append("isAnd=").append(isAnd);
if (map.size() > 0) {
sb.append(", {");
boolean first = true;
for (final Map.Entry<String, List<String>> entry : map.entrySet()) {
if (!first) {
sb.append(", ");
}
first = false;
final List<String> list = entry.getValue();
final String value = list.size() > 1 ? list.get(0) : list.toString();
sb.append(entry.getKey()).append("=").append(value);
}
sb.append("}");
}
return sb.toString();
}
protected boolean isAnd() {
return isAnd;
}
protected Map<String, List<String>> getMap() {
return map;
}
@PluginFactory
public static MapFilter createFilter(@PluginElement("pairs") final KeyValuePair[] pairs,
@PluginAttr("operator") final String oper,
@PluginAttr("onmatch") final String match,
@PluginAttr("onmismatch") final String mismatch) {
if (pairs == null || pairs.length == 0) {
LOGGER.error("keys and values must be specified for the MapFilter");
return null;
}
final Map<String, List<String>> map = new HashMap<String, List<String>>();
for (final KeyValuePair pair : pairs) {
final String key = pair.getKey();
if (key == null) {
LOGGER.error("A null key is not valid in MapFilter");
continue;
}
final String value = pair.getValue();
if (value == null) {
LOGGER.error("A null value for key " + key + " is not allowed in MapFilter");
continue;
}
List<String> list = map.get(pair.getKey());
if (list != null) {
list.add(value);
} else {
list = new ArrayList<String>();
list.add(value);
map.put(pair.getKey(), list);
}
}
if (map.size() == 0) {
LOGGER.error("MapFilter is not configured with any valid key value pairs");
return null;
}
final boolean isAnd = oper == null || !oper.equalsIgnoreCase("or");
final Result onMatch = Result.toResult(match);
final Result onMismatch = Result.toResult(mismatch);
return new MapFilter(map, isAnd, onMatch, onMismatch);
}
}