com.bstek.dorado.data.config.xml.DataElementParserSupport.java Source code

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Here is the source code for com.bstek.dorado.data.config.xml.DataElementParserSupport.java

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/*
 * This file is part of Dorado 7.x (http://dorado7.bsdn.org).
 * 
 * Copyright (c) 2002-2012 BSTEK Corp. All rights reserved.
 * 
 * This file is dual-licensed under the AGPLv3 (http://www.gnu.org/licenses/agpl-3.0.html) 
 * and BSDN commercial (http://www.bsdn.org/licenses) licenses.
 * 
 * If you are unsure which license is appropriate for your use, please contact the sales department
 * at http://www.bstek.com/contact.
 */

package com.bstek.dorado.data.config.xml;

import org.apache.commons.lang.StringUtils;

import com.bstek.dorado.config.definition.DefinitionReference;
import com.bstek.dorado.core.el.Expression;
import com.bstek.dorado.data.config.DataTypeSupportedExpression;
import com.bstek.dorado.data.config.definition.DataCreationContext;
import com.bstek.dorado.data.config.definition.DataTypeDefinition;
import com.bstek.dorado.data.type.DataType;

/**
 * ???
 * 
 * @author Benny Bao (mailto:benny.bao@bstek.com)
 * @since Mar 16, 2008
 */
public class DataElementParserSupport extends GenericParser {

    /**
     * ?????DataType
     * 
     * @throws Exception
     */
    protected DataType getCurrentDataType(DataParseContext context) throws Exception {
        DataType dataType = null;
        DefinitionReference<DataTypeDefinition> dataTypeRef = context.getCurrentDataType();
        if (dataTypeRef != null) {
            dataType = (DataType) dataTypeRef.getDefinition().create(new DataCreationContext());
        }
        return dataType;
    }

    /**
     * ??DataType??DataType???
     * 
     * @throws Exception
     * @see #getCurrentDataType(DataParseContext)
     */
    protected Object parseValueFromText(String valueText, DataParseContext context) throws Exception {
        Object value = valueText;
        if (StringUtils.isNotEmpty(valueText)) {
            Expression expression = getExpressionHandler().compile(valueText);
            if (expression != null) {
                DataType dataType = getCurrentDataType(context);
                if (dataType != null) {
                    value = new DataTypeSupportedExpression(dataType, expression);
                } else {
                    value = expression;
                }
            } else {
                DataType dataType = getCurrentDataType(context);
                if (dataType != null) {
                    value = dataType.fromText(valueText);
                }
            }
        }
        return value;
    }

}