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

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Here is the source code for com.bstek.dorado.data.config.xml.DataElementParser.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 java.util.List;

import org.apache.commons.lang.StringUtils;
import org.w3c.dom.Element;
import org.w3c.dom.Node;

import com.bstek.dorado.config.ConfigUtils;
import com.bstek.dorado.config.xml.XmlConstants;
import com.bstek.dorado.config.xml.XmlParseException;
import com.bstek.dorado.config.xml.XmlParser;
import com.bstek.dorado.core.el.Expression;
import com.bstek.dorado.util.xml.DomUtils;

/**
 * ??
 * 
 * @author Benny Bao (mailto:benny.bao@bstek.com)
 * @since Apirl 18, 2007
 */
public class DataElementParser extends DataElementParserSupport {

    @Override
    protected Object internalParse(Node node, DataParseContext context) throws Exception {
        Object data = null;
        if (node instanceof Element) {
            boolean duringParsingDataElement = context.isDuringParsingDataElement();
            if (!duringParsingDataElement) {
                context.setDuringParsingDataElement(true);
            }

            Element element = (Element) node;
            if (element.getChildNodes().getLength() == 0) {
                String valueText = element.getAttribute(XmlConstants.ATTRIBUTE_VALUE);
                if (StringUtils.isNotEmpty(valueText)) {
                    data = parseValueFromText(valueText, context);
                }
            } else {
                List<Element> elements = DomUtils.getChildElements(element);
                int size = elements.size();
                if (size == 0) {
                    XmlParser parser = findSubParser(XmlConstants.VALUE);
                    if (parser != null) {
                        data = parser.parse(element, context);
                    } else {
                        data = ConfigUtils.IGNORE_VALUE;
                    }
                } else if (size == 1) {
                    data = dispatchElement(null, elements.get(0), context);
                } else if (size > 1) {
                    throw new XmlParseException("Can not contains more than one data elements.", element, context);
                }
            }

            if (!duringParsingDataElement) {
                context.setDuringParsingDataElement(false);
            }
        } else {
            data = node.getNodeValue();
            Expression expression = getExpressionHandler().compile((String) data);
            if (expression != null) {
                data = expression;
            }
        }
        return data;
    }

}