util.java

一个接收基于WebDav邮件的开源项目

/*
 *  This file is part of the JDAVMail package
 *  Copyright (C) 2002 Luc Claes. All rights reserved.
 *
 *  This library 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 2 of the License, or (at your option) any later version.
 *
 *  This library 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. IN NO EVENT
 *  SHALL THE JDAVMail AUTHORS OR THE PROJECT CONTRIBUTORS BE LIABLE
 *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
 *  OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 *  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 *  OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 *  SUCH DAMAGE. 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 this library; if not, write to the Free
 *  Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 *  MA 02111-1307, USA
 *
 *  For questions, suggestions, bug-reports, enhancement-requests etc.
 *  I may be contacted at:
 *
 *  [e-mail]
 *
 *  The JDAVMail's home page is located at:
 *
 *  http://jdavmail.sourceforge.net
 *
 */
package com.posisoft.jdavmail;

import org.jdom.Element;

/**
 * General purpose, static methods.
 * 
 * @author Luc Claes
 */
public class Util {

	/**
	 * Extract an integer value from the content of an XML element.
	 * 
	 * @param elem, the XML (JDOM) element to evaluate.
	 * @param nDefault the default value, to be used if the element doesn't exist.
	 */
	public static int getIntValue(Element elem, int nDefault){
		int nValue = nDefault;
		if (elem != null) {
			String strValue = elem.getTextTrim();
			try {
				nValue = Integer.parseInt(strValue);
			} catch (Exception e) {
			}
		}
		return nValue;
	}
	
	/**
	 * Extract a 'boolean' value from the content of an XML element.
	 * 
	 * @param elem, the XML (JDOM) element to evaluate.
	 * @return if the element exists, <b>true</b> iff the integer value of the element content is non-zero.
	 *	If the element dosn't exist, return the default value.
	 */
	public static boolean getBooleanValue(Element elem, boolean bDefault){
		return getIntValue(elem, bDefault ? 1 : 0) != 0;
	}
	
	/**
	 * Extract a string value from the content of an XML element.
	 * 
	 * @param elem, the XML (JDOM) element to evaluate.
	 * @param strDefault the default value, to be used if the element doesn't exist.
	 */
	public static String getStringValue(Element elem, String strDefault){
		String strValue = strDefault;
		if (elem != null) {
			strValue = elem.getText();
		}
		return strValue;
	}
}