src/main/java/org/apache/james/mime4j/field/ContentTransferEncodingField.java

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 * 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   *
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package org.apache.james.mime4j.field;

import org.apache.james.mime4j.util.MimeUtil;



/**
 * Represents a <code>Content-Transfer-Encoding</code> field.
 *
 * 
 * @version $Id: ContentTransferEncodingField.java,v 1.2 2004/10/02 12:41:11 ntherning Exp $
 */
public class ContentTransferEncodingField extends Field {
    private String encoding;
    
    protected ContentTransferEncodingField(String name, String body, String raw, String encoding) {
        super(name, body, raw);
        this.encoding = encoding;
    }

    /**
     * Gets the encoding defined in this field.
     * 
     * @return the encoding or an empty string if not set.
     */
    public String getEncoding() {
        return encoding;
    }
    
    /**
     * Gets the encoding of the given field if. Returns the default 
     * <code>7bit</code> if not set or if
     * <code>f</code> is <code>null</code>.
     * 
     * @return the encoding.
     */
    public static String getEncoding(ContentTransferEncodingField f) {
        if (f != null && f.getEncoding().length() != 0) {
            return f.getEncoding();
        }
        return MimeUtil.ENC_7BIT;
    }
    
    public static class Parser implements FieldParser {
        public Field parse(final String name, final String body, final String raw) {
            final String encoding = body.trim().toLowerCase();
            return new ContentTransferEncodingField(name, body, raw, encoding);
        }
    }
}