anchortag.java

java 写的一个新闻发布系统

package org.jahia.taglibs.container;

import org.jahia.data.JahiaData;
import org.jahia.data.containers.JahiaContainer;
import org.jahia.data.fields.JahiaField;
import org.jahia.exceptions.JahiaException;
import org.jahia.utils.JahiaConsole;

import java.io.*;
import java.util.*;

import javax.servlet.*;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;


/**
 * Class AnchorTag : draw an anchor for the enclosing container on the given field
 *
 * @author  Jerome Tamiotti
 */
public class AnchorTag extends TagSupport {

    private String fieldName = "";

    public void setFieldName(String name) {
        this.fieldName = name;
    }


    public int doStartTag() {

        ContainerTag parent = (ContainerTag) findAncestorWithClass(this, ContainerTag.class);

        if (parent != null) {
            if (parent.isDeclarationPass()) {
                return SKIP_BODY;
            }

            JahiaContainer container = parent.getContainer();
            if (container != null) {
                try {
                    JahiaField theField = container.getField(this.fieldName);
                    if (theField != null) {
                        ServletRequest request = pageContext.getRequest();
                        JahiaData jData = (JahiaData) request.getAttribute("org.jahia.data.JahiaData");
                        if (jData == null) {
                            HashMap tempEngineMap = (HashMap) request.getAttribute("org.jahia.engines.EngineHashMap");
                            jData                 = (JahiaData) tempEngineMap.get("jData");
                        }
                        JspWriter out = pageContext.getOut();
                        out.print(jData.gui().html().drawAnchor(theField));
                    }
                } catch (JahiaException je) {
                    JahiaConsole.println("AnchorTag.doStartTag", je.toString());
                } catch (IOException ioe) {
                    JahiaConsole.println("AnchorTag.doStartTag", ioe.toString());
                }
            }
        }
        return SKIP_BODY;
    }

}