org.apache.james.mailbox.backup.FlagsExtraField.java Source code

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Here is the source code for org.apache.james.mailbox.backup.FlagsExtraField.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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 * software distributed under the License is distributed on an  *
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package org.apache.james.mailbox.backup;

import java.util.Optional;
import java.util.stream.Collectors;
import java.util.stream.Stream;

import javax.mail.Flags;

import org.apache.commons.compress.archivers.zip.ZipShort;
import org.apache.james.util.StreamUtils;

public class FlagsExtraField extends StringExtraField {

    public static final ZipShort ID_AP = new ZipShort(0x7061); // "ap" in little-endian

    private static String serializeFlags(Flags flags) {
        return Stream
                .concat(StreamUtils.ofNullable(flags.getSystemFlags()).map(FlagsExtraField::systemFlagToString),
                        StreamUtils.ofNullable(flags.getUserFlags()))
                .collect(Collectors.joining("%"));
    }

    public FlagsExtraField() {
        super();
    }

    public FlagsExtraField(Flags flags) {
        super(Optional.of(serializeFlags(flags)));
    }

    @Override
    public ZipShort getHeaderId() {
        return ID_AP;
    }

    private static String systemFlagToString(Flags.Flag flag) throws RuntimeException {
        if (flag == Flags.Flag.ANSWERED) {
            return "\\ANSWERED";
        } else if (flag == Flags.Flag.DELETED) {
            return "\\DELETED";
        } else if (flag == Flags.Flag.DRAFT) {
            return "\\DRAFT";
        } else if (flag == Flags.Flag.FLAGGED) {
            return "\\FLAGGED";
        } else if (flag == Flags.Flag.RECENT) {
            return "\\RECENT";
        } else if (flag == Flags.Flag.SEEN) {
            return "\\SEEN";
        }
        throw new RuntimeException("Unknown system flag");
    }
}