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'databene commons' is an open source Java library by Volker Bergmann. It provides extensions to the Java core library by utility classes, abstract concepts and concrete implementations.

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/*
 * Copyright (C) 2004-2015 Volker Bergmann ([email protected]).
 * All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.databene.commons.converter;

import org.databene.commons.ConversionException;
import org.databene.commons.SystemInfo;
import org.databene.commons.xml.XMLUtil;
import org.w3c.dom.CDATASection;
import org.w3c.dom.CharacterData;
import org.w3c.dom.Comment;
import org.w3c.dom.Document;
import org.w3c.dom.Element;

/**
 * Converts content elements of org.w3c.Document to strings.
 * Created: 20.11.2015 18:00:16
 * @since 1.0.6
 * @author Volker Bergmann
 */

public class XMLNode2StringConverter extends UnsafeConverter {
	
	private static final String LF = SystemInfo.getLineSeparator();
	private static final XMLNode2StringConverter DEFAULT_INSTANCE = new XMLNode2StringConverter();

	public XMLNode2StringConverter() {
		super(Object.class, String.class);
	}

	@Override
	public String convert(Object node) throws ConversionException {
		if (node instanceof CDATASection)
			return "";
		else if (node instanceof CharacterData) 
			return "'" + ((CharacterData) node).getTextContent() + "'";
		else if (node instanceof Element)
			return LF + XMLUtil.format((Element) node).trim() + LF;
		else if (node instanceof Comment)
			return LF + ((Comment) node).getData() + LF;
		else if (node instanceof Document)
			return XMLUtil.format((Document) node);
		else if (node instanceof String)
			return "'" + node + "'";
		else
			return ToStringConverter.convert(node, "");
	}

	public static String format(Object node) throws ConversionException {
		return DEFAULT_INSTANCE.convert(node);
	}

}