dom/src/main/java/org/apache/james/mime4j/field/ContentIdFieldImpl.java

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 * 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   *
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 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY       *
 * KIND, either express or implied.  See the License for the    *
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package org.apache.james.mime4j.field;

import org.apache.james.mime4j.codec.DecodeMonitor;
import org.apache.james.mime4j.dom.FieldParser;
import org.apache.james.mime4j.dom.field.ContentIdField;
import org.apache.james.mime4j.stream.Field;

/**
 * Represents a <code>Content-Transfer-Encoding</code> field.
 */
public class ContentIdFieldImpl extends AbstractField implements ContentIdField {

    private boolean parsed = false;
    private String id;

    ContentIdFieldImpl(Field rawField, DecodeMonitor monitor) {
        super(rawField, monitor);
    }

    private void parse() {
        parsed = true;
        String body = getBody();
        if (body != null) {
            id = body.trim();
        } else {
            id = null;
        }
    }
    
    public String getId() {
        if (!parsed) {
            parse();
        }
        return id;
    }

    public static final FieldParser<ContentIdField> PARSER = new FieldParser<ContentIdField>() {
        
        public ContentIdField parse(final Field rawField, final DecodeMonitor monitor) {
            return new ContentIdFieldImpl(rawField, monitor);
        }
        
    };

}