rolebuttontag.java

struts-menu完整例子

/**
 * 类的说明
 * @author 宋文凯
 * @since  2005-10-31
 */
package com.oppo.elms.pub.taglib;

import java.util.Hashtable;
import javax.servlet.ServletRequest;
import javax.servlet.http.HttpSession;
import javax.servlet.jsp.JspException;
import org.apache.struts.taglib.html.BaseHandlerTag;
import org.apache.struts.util.ResponseUtils;
import com.oppo.elms.pub.AdmAcessCtl;

//import com.nbw.doc.wd.dao.WdflDao;

/**
 * Renders an HTML BUTTON tag within the Struts framework.
 *
 * @author Don Clasen
 * @version $Revision$ $Date$
 */

@SuppressWarnings("serial")
public class RoleButtonTag extends BaseHandlerTag {
	// ----------------------------------------------------- Instance Variables

	/**
	 * The property name of the generated button.
	 */
	protected String property = null;

	/**
	 * The body content of this tag (if any).
	 */
	protected String text = null;

	/**
	 * The value of the button label.
	 */
	protected String value = null;
	protected String buttontype = null;

	// ------------------------------------------------------------- Properties

	/**
	 * Return the property name.
	 */
	public String getProperty() {
		return (property);
	}

	/**
	 * Set the property name.
	 *
	 * @param property The property name
	 */
	public void setProperty(String property) {
		this.property = property;
	}

	/**
	 * Return the label value.
	 */
	public String getValue() {
		return (value);
	}

	/**
	 * Set the label value.
	 * @param value The label value
	 */
	public void setValue(String value) {
		this.value = value;
	}

	/**
	 * @return 返回 auth。
	 */
	public String getButtontype() {
		return buttontype;
	}

	/**
	 * @param auth 要设置的 auth。
	 */
	public void setButtontype(String buttontype) {
		this.buttontype = buttontype;
	}

	// --------------------------------------------------------- Public Methods

	/**
	 * Process the start of this tag.
	 * @exception JspException if a JSP exception has occurred
	 */
	@SuppressWarnings("deprecation")
	public int doStartTag() throws JspException {

		// Do nothing until doEndTag() is called
		this.text = null;
		return (EVAL_BODY_TAG);
	}

	/**
	 * Save the associated label from the body content (if any).
	 * @exception JspException if a JSP exception has occurred
	 */
	public int doAfterBody() throws JspException {

		if (bodyContent != null) {
			String value = bodyContent.getString().trim();
			if (value.length() > 0)
				text = value;
		}
		return (SKIP_BODY);
	}

	/**
	 * Process the end of this tag.
	 * <p>
	 * Support for indexed property since Struts 1.1
	 * @exception JspException if a JSP exception has occurred
	 */
	@SuppressWarnings("deprecation")
	public int doEndTag() throws JspException {

		// Acquire the label value we will be generating
		String label = value;
		if ((label == null) && (text != null))
			label = text;
		if ((label == null) || (label.trim().length() < 1))
			label = "Click";

		// Generate an HTML element
		StringBuffer results = new StringBuffer();
		results.append("<input type=\"button\"");
		if (property != null) {
			results.append(" name=\"");
			results.append(property);
			// * @since Struts 1.1
			if (indexed)
				prepareIndex(results, null);
			results.append("\"");
		}
		if (accesskey != null) {
			results.append(" accesskey=\"");
			results.append(accesskey);
			results.append("\"");
		}
		if (tabindex != null) {
			results.append(" tabindex=\"");
			results.append(tabindex);
			results.append("\"");
		}

		if (buttontype != null) {

			HttpSession session = pageContext.getSession();
			@SuppressWarnings("unused")
			Hashtable verifyPara = (Hashtable) session.getAttribute("hashSysPara");
			int row = 0;
			@SuppressWarnings("unused")
			ServletRequest hreq = pageContext.getRequest();
			if (session.getAttribute("toNodename") == null)
				row = 0;
			else {
				String nodename = (String) session.getAttribute("toNodename");
				String userid = (String) ((Hashtable) pageContext.getSession().getAttribute("hashSysPara")).get("userid");
				AdmAcessCtl ctl = new AdmAcessCtl();
				row = ctl.getRoleButton(userid, buttontype, nodename);
			}
			//row = 1;//tomcat 
			if (row <= 0){
				results.append(" style=\"");
				results.append("display: none");
				results.append("\"");
			}
		}

		results.append(" value=\"");
		results.append(label);
		results.append("\"");
		results.append(prepareEventHandlers());
		results.append(prepareStyles());
		results.append(getElementClose());

		// Render this element to our writer
		ResponseUtils.write(pageContext, results.toString());

		// Evaluate the remainder of this page
		return (EVAL_PAGE);

	}

	/**
	 * Release any acquired resources.
	 */
	public void release() {

		super.release();
		property = null;
		text = null;
		value = null;
	}
	
}