experimental/trunk_core_with_pluggable_logger/optional-support/logging/commons-logging-support/src/main/java/org/apache/myfaces/extensions/validator/support/logging/commons/CachingCommonsLoggingLoggerFactory.java

/*
 * 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.myfaces.extensions.validator.support.logging.commons;

import org.apache.myfaces.extensions.validator.internal.UsageInformation;
import org.apache.myfaces.extensions.validator.internal.UsageCategory;
import org.apache.myfaces.extensions.validator.core.logging.AbstractLoggerFactory;
import org.apache.myfaces.extensions.validator.core.logging.Logger;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import java.util.Map;
import java.util.HashMap;

/**
 * @author Gerhard Petracek
 * @since 1.x.1
 */
@UsageInformation(UsageCategory.INTERNAL)
public class CachingCommonsLoggingLoggerFactory extends AbstractLoggerFactory
{
    private Map<Class, Log> classToLoggerMapping = new HashMap<Class, Log>();

    protected Logger createLogger(Class targetClass)
    {
        if(!this.classToLoggerMapping.containsKey(targetClass))
        {
            this.classToLoggerMapping.put(targetClass, LogFactory.getLog(targetClass));
        }
        return new CommonsLoggingLoggerAdapter(this.classToLoggerMapping.get(targetClass));
    }
}