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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.jsieve.mail.optional;

import java.util.List;

import org.apache.jsieve.mail.SieveMailException;

/**
 * Interface EnvelopeAccessors specifies the method signatures required to
 * support the Envelope Test.
 */
public interface EnvelopeAccessors {
    /**
     * Method getEnvelope answers a List of all of the envelope values in the
     * receiver whose name is equal to the passed name. If no values are found
     * an empty List is returned.
     * 
     * @param name
     * @return List
     * @throws SieveMailException
     */
    public List<String> getEnvelope(String name) throws SieveMailException;

    /**
     * Method getEnvelopeNames answers a List of the names of the envelope
     * values in the receiver. No duplicates are allowed.
     * 
     * @return List
     * @throws SieveMailException
     */
    public List<String> getEnvelopeNames() throws SieveMailException;

    /**
     * <p>
     * Method getMatchingEnvelope answers a List of all of the envelope values
     * in the receiver with the passed name. If no matching names are found an
     * empty List is returned.
     * </p>
     * 
     * <p>
     * This method differs from getEnvelope(String) in that it ignores case and
     * the whitespace prefixes and suffixes of an envelope value name when
     * performing the match, as required by RFC 3028. Thus "From", "from ", "
     * From" and " from " are considered equal.
     * </p>
     * 
     * @param name
     * @return List
     * @throws SieveMailException
     */
    public List<String> getMatchingEnvelope(String name) throws SieveMailException;

}