// $Id:
// Exp $
// FORESTER -- software libraries and applications
// for evolutionary biology research and applications.
//
// Copyright (C) 2008-2009 Christian M. Zmasek
// Copyright (C) 2008-2009 Burnham Institute for Medical Research
// All rights reserved
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
//
// Contact: phylosoft @ gmail . com
// WWW: https://sites.google.com/site/cmzmasek/home/software/forester

package org.forester.surfacing;

import java.util.HashMap;
import java.util.Map;

import org.forester.protein.BasicDomain;
import org.forester.protein.BinaryDomainCombination;

public class AdjactantDirectedBinaryDomainCombination extends BasicBinaryDomainCombination {

    final private static Map<Integer, AdjactantDirectedBinaryDomainCombination> ADDC_POOL = new HashMap<Integer, AdjactantDirectedBinaryDomainCombination>();

    private AdjactantDirectedBinaryDomainCombination( final String n_terminal, final String c_terminal ) {
        super();
        if ( ( n_terminal == null ) || ( c_terminal == null ) ) {
            throw new IllegalArgumentException( "attempt to create binary domain combination using null" );
        }
        _id0 = BasicDomain.obtainIdAsShort( n_terminal );
        _id1 = BasicDomain.obtainIdAsShort( c_terminal );
    }

    public final static AdjactantDirectedBinaryDomainCombination obtainInstance( final String ids ) {
        if ( ids.indexOf( BinaryDomainCombination.SEPARATOR ) < 1 ) {
            throw new IllegalArgumentException( "Unexpected format for binary domain combination [" + ids + "]" );
        }
        final String[] ids_ary = ids.split( BinaryDomainCombination.SEPARATOR );
        if ( ids_ary.length != 2 ) {
            throw new IllegalArgumentException( "Unexpected format for binary domain combination [" + ids + "]" );
        }
        return AdjactantDirectedBinaryDomainCombination.obtainInstance( ids_ary[ 0 ], ids_ary[ 1 ] );
    }

    public final static AdjactantDirectedBinaryDomainCombination obtainInstance( final String n_terminal,
                                                                                 final String c_terminal ) {
        final int code = calcCode( BasicDomain.obtainIdAsShort( n_terminal ), BasicDomain.obtainIdAsShort( c_terminal ) );
        if ( ADDC_POOL.containsKey( code ) ) {
            return ADDC_POOL.get( code );
        }
        else {
            final AdjactantDirectedBinaryDomainCombination dc = new AdjactantDirectedBinaryDomainCombination( n_terminal,
                                                                                                              c_terminal );
            ADDC_POOL.put( code, dc );
            if ( VERBOSE && ( ( ADDC_POOL.size() % 100 ) == 0 ) ) {
                System.out.println( " addc pool size: " + ADDC_POOL.size() );
            }
            return dc;
        }
    }
}