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/*
    This file is part of the Zeidon Java Object Engine (Zeidon JOE).

    Zeidon JOE 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 3 of the License, or
    (at your option) any later version.

    Zeidon JOE 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 Zeidon JOE.  If not, see .

    Copyright 2009-2015 QuinSoft
 */

package com.quinsoft.zeidon.domains;

import java.util.Map;

import org.apache.commons.codec.binary.Base64;

import com.quinsoft.zeidon.Application;
import com.quinsoft.zeidon.AttributeInstance;
import com.quinsoft.zeidon.Blob;
import com.quinsoft.zeidon.Task;
import com.quinsoft.zeidon.objectdefinition.AttributeDef;

/**
 * A version of the Blob domain that uses Base64 for getString()
 * and setting from a string.
 */
public class Base64BlobDomain extends BlobDomain
{

    public Base64BlobDomain( Application application, Map domainProperties, Task task )
    {
        super( application, domainProperties, task );
    }

    @Override
    public Object convertExternalValue(Task task, AttributeInstance attributeInstance, AttributeDef attributeDef, String contextName, Object externalValue)
    {
        if ( externalValue instanceof CharSequence )
            return new Blob( Base64.decodeBase64( externalValue.toString() ) );

        return super.convertExternalValue( task, attributeInstance, attributeDef, contextName, externalValue );
    }

    @Override
    public String convertToString(Task task, AttributeDef attributeDef, Object internalValue, String contextName)
    {
        return convertToString( task, attributeDef, internalValue );
    }

    @Override
    public String convertToString(Task task, AttributeDef attributeDef, Object internalValue)
    {
        if ( internalValue instanceof Blob )
        {
            Blob blob = (Blob) internalValue;
            return Base64.encodeBase64String( blob.getBytes() );
        }

        return super.convertToString( task, attributeDef, internalValue );
    }

}