/*
 * 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.pattern;

import org.apache.logging.log4j.core.LogEvent;


/**
 *
 */
public class PatternFormatter {
    private final LogEventPatternConverter converter;
    private final FormattingInfo field;
    private final boolean skipFormattingInfo;

    public PatternFormatter(final LogEventPatternConverter converter, final FormattingInfo field) {
        this.converter = converter;
        this.field = field;
        this.skipFormattingInfo = field == FormattingInfo.getDefault();
    }

    public void format(final LogEvent event, final StringBuilder buf) {
        if (skipFormattingInfo) {
            converter.format(event, buf);
        } else {
            formatWithInfo(event, buf);
        }
    }
    private void formatWithInfo(final LogEvent event, final StringBuilder buf) {
        final int startField = buf.length();
        converter.format(event, buf);
        field.format(startField, buf);
    }

    public LogEventPatternConverter getConverter() {
        return converter;
    }

    public FormattingInfo getFormattingInfo() {
        return field;
    }

    
Normally pattern formatters are not meant to handle Exceptions although few pattern formatters might.

By examining the return values for this method, the containing layout will determine whether it handles
throwables or not.

Returns:
true if this PatternConverter handles throwables/**
     * Normally pattern formatters are not meant to handle Exceptions although few pattern formatters might.
     * <p>
     * By examining the return values for this method, the containing layout will determine whether it handles
     * throwables or not.
     * </p>
     *
     * @return true if this PatternConverter handles throwables
     */
    public boolean handlesThrowable() {
        return converter.handlesThrowable();
    }

    
Returns a String suitable for debugging.
Returns:
a String suitable for debugging./**
     * Returns a String suitable for debugging.
     *
     * @return a String suitable for debugging.
     */
    @Override
    public String toString() {
        final StringBuilder sb = new StringBuilder();
        sb.append(super.toString());
        sb.append("[converter=");
        sb.append(converter);
        sb.append(", field=");
        sb.append(field);
        sb.append(']');
        return sb.toString();
    }
}