【Java开源代码栏目提醒】:文章导读:在新的一年中,各位网友都进入紧张的学习或是工作阶段。网学会员整理了Java开源代码-ConstantsTei.java的相关内容供大家参考,祝大家在新的一年里工作和学习顺利!
package com.welshow.hbp.webapp.taglib;
import java.lang.reflect.AccessibleObject;
import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.jsp.tagext.TagData;
import javax.servlet.jsp.tagext.TagExtraInfo;
import javax.servlet.jsp.tagext.VariableInfo;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import com.welshow.hbp.Constants;
/**
* Implementation of <code>TagExtraInfo</code> for the <b>constants</b>
* tag, identifying the scripting object(s) to be made visible.
*
* @author Matt Raible
* @version $Revision: 1.5 $ $Date: 2006-01-29 22:00:13 -0700 (Sun, 29 Jan 2006) $
*/
public class ConstantsTei extends TagExtraInfo {
private final Log log = LogFactory.getLog(ConstantsTei.class);
/**
* Return information about the scripting variables to be created.
*/
public VariableInfo[] getVariableInfo(TagData data) {
// loop through and expose all attributes
List vars = new ArrayList();
try {
String clazz = data.getAttributeString("className");
if (clazz == null) {
clazz = Constants.class.getName();
}
Class c = Class.forName(clazz);
// if no var specified, get all
if (data.getAttributeString("var") == null) {
Field[] fields = c.getDeclaredFields();
AccessibleObject.setAccessible(fields, true);
for (int i = 0; i < fields.length; i++) {
String type = fields[i].getType().getName();
vars.add(new VariableInfo(fields[i].getName(),
((fields[i].getType().isArray()) ? type.substring(2, type.length()-1) + "[]" : type),
true, VariableInfo.AT_END));
}
} else {
String var = data.getAttributeString("var");
String type = c.getField(var).getType().getName();
vars.add(new VariableInfo(c.getField(var).getName(),
((c.getField(var).getType().isArray()) ? type.substring(2, type.length()-1) + "[]" : type),
true, VariableInfo.AT_END));
}
} catch (Exception cnf) {
log.error(cnf.getMessage());
cnf.printStackTrace();
}
return (VariableInfo[]) vars.toArray(new VariableInfo[] { });
}
}