// This Source Code is in the Public Domain per: http://unlicense.org
package org.litesoft.orsup.nonpublic;

public enum TransState
{
    ACTIVE
            {
                @Override
                public TransState commitInit()
                {
                    return COMMITING;
                }
            },
    COMMITING
            {
                @Override
                public TransState clearCommitting()
                {
                    return ACTIVE;
                }

                @Override
                public TransState commitSucceeded()
                {
                    return COMMITED;
                }

                @Override
                public TransState commitLowLevel()
                {
                    return LL_COMMITING;
                }
            },
    LL_COMMITING
            {
                @Override
                public TransState clearCommitting()
                {
                    return ACTIVE;
                }

                @Override
                public TransState commitSucceeded()
                {
                    return COMMITED;
                }

                @Override
                public TransState commitFailed()
                {
                    return ACTIVE;
                }

                @Override
                public boolean supportsPOmodification()
                {
                    return false;
                }
            },

    COMMITED
            {
                @Override
                public TransState clearCommitting()
                {
                    return this;
                }

                @Override
                public TransState dispose()
                {
                    return this;
                }

                @Override
                public boolean isFunctional()
                {
                    return false;
                }
            },
    DISPOSED
            {
                @Override
                public boolean isFunctional()
                {
                    return false;
                }
            };

    public boolean supportsPOmodification()
    {
        return isFunctional();
    }

    public boolean isFunctional()
    {
        return true;
    }

    public TransState clearCommitting()
    {
        throw doesNotSupport( "clearCommitting" );
    }

    public TransState dispose()
    {
        return DISPOSED;
    }

    public TransState commitInit()
    {
        throw doesNotSupport( "commitInit" );
    }

    public TransState commitLowLevel()
    {
        throw doesNotSupport( "commitLowLevel" );
    }

    public TransState commitSucceeded()
    {
        throw doesNotSupport( "commitSucceeded" );
    }

    public TransState commitFailed()
    {
        throw doesNotSupport( "commitFailed" );
    }

    private IllegalStateException doesNotSupport( String pWhat )
    {
        return new IllegalStateException( "Transaction state '" + this + "' does not support: " + pWhat + "!" );
    }
}