/*
 *  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.tools.ant.listener;

import org.apache.tools.ant.BuildEvent;
import org.apache.tools.ant.DefaultLogger;

/**
 * A logger which logs nothing but build failure and what task might output
 *
 * @since 1.9.0
 */
public class SilentLogger extends DefaultLogger {

    @Override
    public void buildStarted(BuildEvent event) {
        // log nothing
    }

    @Override
    public void buildFinished(BuildEvent event) {
        if (event.getException() != null) {
            super.buildFinished(event);
        }
    }

    @Override
    public void targetStarted(BuildEvent event) {
        // log nothing
    }

    @Override
    public void targetFinished(BuildEvent event) {
        // log nothing
    }

    @Override
    public void taskStarted(BuildEvent event) {
        // log nothing
    }

    @Override
    public void taskFinished(BuildEvent event) {
        // log nothing
    }

}