com.quinsoft.zeidon.domains.Base64BlobDomain.java Source code

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Here is the source code for com.quinsoft.zeidon.domains.Base64BlobDomain.java

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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 <http://www.gnu.org/licenses/>.
    
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<String, Object> 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);
    }

}