DNSOperationCode.java

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package javax.jmdns.impl.constants;

public enum DNSOperationCode {
    Query("Query", 0),
    IQuery("Inverse Query", 1),
    Status("Status", 2),
    Unassigned("Unassigned", 3),
    Notify("Notify", 4),
    Update("Update", 5);

    static final int     OpCode_MASK = 0x7800;

    private final String _externalName;

    private final int    _index;

    DNSOperationCode(String name, int index) {
        _externalName = name;
        _index = index;
    }

    public String externalName() {
        return _externalName;
    }

    public int indexValue() {
        return _index;
    }

    public static DNSOperationCode operationCodeForFlags(int flags) {
        int maskedIndex = (flags & OpCode_MASK) >> 11;
        for (DNSOperationCode aCode : DNSOperationCode.values()) {
            if (aCode._index == maskedIndex) return aCode;
        }
        return Unassigned;
    }

    @Override
    public String toString() {
        return this.name() + " index " + this.indexValue();
    }

}