__happyaxis.java

《J2EE企业级应用开发》一书的配套源代码

/* compiled from JSP: /happyaxis.jsp
*
* This code was automatically generated at 23:38:14 on 2001-4-14
* by weblogic.servlet.jsp.Jsp2Java -- do not edit.
*/

package jsp_servlet;

import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;

// User imports
import java.io.InputStream; //[ /happyaxis.jsp; Line: 10]
import java.io.IOException; //[ /happyaxis.jsp; Line: 10]
import javax.xml.parsers.SAXParser; //[ /happyaxis.jsp; Line: 10]
import javax.xml.parsers.SAXParserFactory; //[ /happyaxis.jsp; Line: 10]


// built-in init parameters:
// boolean             _verbose -- wants debugging

// Well-known variables:
// JspWriter out                  -- to write to the browser
// HttpServletRequest  request    -- the request object.
// HttpServletResponse response   -- the response object.
// PageContext pageContext        -- the page context for this JSP
// HttpSession session            -- the session object for the client (if any)
// ServletContext application     -- The servlet (application) context
// ServletConfig config           -- The ServletConfig for this JSP
// Object page                    -- the instance of this page's implementation class (i.e., 'this')

/**
* This code was automatically generated at 23:38:14 on 2001-4-14
* by weblogic.servlet.jsp.Jsp2Java -- do not edit.
*
* Copyright (c) 2001 by BEA Systems, Inc. All Rights Reserved.
*/
public final class __happyaxis
extends
weblogic.servlet.jsp.JspBase
implements weblogic.servlet.jsp.StaleIndicator
{
    
    //[ /happyaxis.jsp; Line: 11]
    //[ /happyaxis.jsp; Line: 12]
    /* //[ /happyaxis.jsp; Line: 13]
    * Happiness tests for axis. These look at the classpath and warn if things //[ /happyaxis.jsp; Line: 14]
    * are missing. Normally addng this much code in a JSP page is mad //[ /happyaxis.jsp; Line: 15]
    * but here we want to validate JSP compilation too, and have a drop-in //[ /happyaxis.jsp; Line: 16]
    * page for easy re-use //[ /happyaxis.jsp; Line: 17]
    * @author Steve 'configuration problems' Loughran //[ /happyaxis.jsp; Line: 18]
    */ //[ /happyaxis.jsp; Line: 19]
    //[ /happyaxis.jsp; Line: 20]
    //[ /happyaxis.jsp; Line: 21]
    /** //[ /happyaxis.jsp; Line: 22]
    * Get a string providing install information. //[ /happyaxis.jsp; Line: 23]
    * TODO: make this platform aware and give specific hints //[ /happyaxis.jsp; Line: 24]
    */ //[ /happyaxis.jsp; Line: 25]
    public String getInstallHints(HttpServletRequest request) { //[ /happyaxis.jsp; Line: 26]
        //[ /happyaxis.jsp; Line: 27]
        String hint= //[ /happyaxis.jsp; Line: 28]
        "<B><I>Note:</I></B> On Tomcat 4.x, you may need to put libraries that contain " //[ /happyaxis.jsp; Line: 29]
        +"java.* or javax.* packages into CATALINA_HOME/commons/lib"; //[ /happyaxis.jsp; Line: 30]
        return hint; //[ /happyaxis.jsp; Line: 31]
    } //[ /happyaxis.jsp; Line: 32]
    //[ /happyaxis.jsp; Line: 33]
    /** //[ /happyaxis.jsp; Line: 34]
    * test for a class existing //[ /happyaxis.jsp; Line: 35]
    * @param classname //[ /happyaxis.jsp; Line: 36]
    * @return class iff present //[ /happyaxis.jsp; Line: 37]
    */ //[ /happyaxis.jsp; Line: 38]
    Class classExists(String classname) { //[ /happyaxis.jsp; Line: 39]
        try { //[ /happyaxis.jsp; Line: 40]
            return Class.forName(classname); //[ /happyaxis.jsp; Line: 41]
        } catch (ClassNotFoundException e) { //[ /happyaxis.jsp; Line: 42]
            return null; //[ /happyaxis.jsp; Line: 43]
        } //[ /happyaxis.jsp; Line: 44]
    } //[ /happyaxis.jsp; Line: 45]
    //[ /happyaxis.jsp; Line: 46]
    /** //[ /happyaxis.jsp; Line: 47]
    * test for resource on the classpath //[ /happyaxis.jsp; Line: 48]
    * @param resource //[ /happyaxis.jsp; Line: 49]
    * @return true iff present //[ /happyaxis.jsp; Line: 50]
    */ //[ /happyaxis.jsp; Line: 51]
    boolean resourceExists(String resource) { //[ /happyaxis.jsp; Line: 52]
        boolean found; //[ /happyaxis.jsp; Line: 53]
        InputStream instream=this.getClass().getResourceAsStream(resource); //[ /happyaxis.jsp; Line: 54]
        found=instream!=null; //[ /happyaxis.jsp; Line: 55]
        if(instream!=null) { //[ /happyaxis.jsp; Line: 56]
            try { //[ /happyaxis.jsp; Line: 57]
                instream.close(); //[ /happyaxis.jsp; Line: 58]
            } catch (IOException e) { //[ /happyaxis.jsp; Line: 59]
            } //[ /happyaxis.jsp; Line: 60]
        } //[ /happyaxis.jsp; Line: 61]
        return found; //[ /happyaxis.jsp; Line: 62]
    } //[ /happyaxis.jsp; Line: 63]
    //[ /happyaxis.jsp; Line: 64]
    /** //[ /happyaxis.jsp; Line: 65]
    * probe for a class, print an error message is missing //[ /happyaxis.jsp; Line: 66]
    * @param out stream to print stuff //[ /happyaxis.jsp; Line: 67]
    * @param category text like "warning" or "error" //[ /happyaxis.jsp; Line: 68]
    * @param classname class to look for //[ /happyaxis.jsp; Line: 69]
    * @param jarFile where this class comes from //[ /happyaxis.jsp; Line: 70]
    * @param errorText extra error text //[ /happyaxis.jsp; Line: 71]
    * @param homePage where to d/l the library //[ /happyaxis.jsp; Line: 72]
    * @return the number of missing classes //[ /happyaxis.jsp; Line: 73]
    * @throws IOException //[ /happyaxis.jsp; Line: 74]
    */ //[ /happyaxis.jsp; Line: 75]
    int probeClass(JspWriter out, //[ /happyaxis.jsp; Line: 76]
    String category, //[ /happyaxis.jsp; Line: 77]
    String classname, //[ /happyaxis.jsp; Line: 78]
    String jarFile, //[ /happyaxis.jsp; Line: 79]
    String description, //[ /happyaxis.jsp; Line: 80]
    String errorText, //[ /happyaxis.jsp; Line: 81]
    String homePage) throws IOException { //[ /happyaxis.jsp; Line: 82]
        //[ /happyaxis.jsp; Line: 83]
        Class clazz = classExists(classname); //[ /happyaxis.jsp; Line: 84]
        if(clazz == null)  { //[ /happyaxis.jsp; Line: 85]
            String url=""; //[ /happyaxis.jsp; Line: 86]
            if(homePage!=null) { //[ /happyaxis.jsp; Line: 87]
                url="<br>  See <a href="+homePage+">"+homePage+"</a>"; //[ /happyaxis.jsp; Line: 88]
            } //[ /happyaxis.jsp; Line: 89]
            out.write("<p>"+category+": could not find class "+classname //[ /happyaxis.jsp; Line: 90]
            +" from file <b>"+jarFile //[ /happyaxis.jsp; Line: 91]
            +"</b><br>  "+errorText //[ /happyaxis.jsp; Line: 92]
            +url //[ /happyaxis.jsp; Line: 93]
            +"<p>"); //[ /happyaxis.jsp; Line: 94]
            return 1; //[ /happyaxis.jsp; Line: 95]
        } else { //[ /happyaxis.jsp; Line: 96]
            String location = getLocation(out, clazz); //[ /happyaxis.jsp; Line: 97]
            if(location == null) { //[ /happyaxis.jsp; Line: 98]
                out.write("Found "+ description + " (" + classname + ")<br>"); //[ /happyaxis.jsp; Line: 99]
            } //[ /happyaxis.jsp; Line: 100]
            else { //[ /happyaxis.jsp; Line: 101]
                out.write("Found "+ description + " (" + classname + ") at " + location + "<br>"); //[ /happyaxis.jsp; Line: 102]
            } //[ /happyaxis.jsp; Line: 103]
            return 0; //[ /happyaxis.jsp; Line: 104]
        } //[ /happyaxis.jsp; Line: 105]
    } //[ /happyaxis.jsp; Line: 106]
    //[ /happyaxis.jsp; Line: 107]
    /** //[ /happyaxis.jsp; Line: 108]
    * get the location of a class //[ /happyaxis.jsp; Line: 109]
    * @param out //[ /happyaxis.jsp; Line: 110]
    * @param clazz //[ /happyaxis.jsp; Line: 111]
    * @return the jar file or path where a class was found //[ /happyaxis.jsp; Line: 112]
    * @throws IOException //[ /happyaxis.jsp; Line: 113]
    */ //[ /happyaxis.jsp; Line: 114]
    //[ /happyaxis.jsp; Line: 115]
    String getLocation(JspWriter out, //[ /happyaxis.jsp; Line: 116]
    Class clazz) throws IOException { //[ /happyaxis.jsp; Line: 117]
        try { //[ /happyaxis.jsp; Line: 118]
            java.net.URL url = clazz.getProtectionDomain().getCodeSource().getLocation(); //[ /happyaxis.jsp; Line: 119]
            String location = url.toString(); //[ /happyaxis.jsp; Line: 120]
            if(location.startsWith("jar")) { //[ /happyaxis.jsp; Line: 121]
                url = ((java.net.JarURLConnection)url.openConnection()).getJarFileURL(); //[ /happyaxis.jsp; Line: 122]
                location = url.toString(); //[ /happyaxis.jsp; Line: 123]
            }  //[ /happyaxis.jsp; Line: 124]
            //[ /happyaxis.jsp; Line: 125]
            if(location.startsWith("file")) { //[ /happyaxis.jsp; Line: 126]
                java.io.File file = new java.io.File(url.getFile()); //[ /happyaxis.jsp; Line: 127]
                return file.getAbsolutePath(); //[ /happyaxis.jsp; Line: 128]
            } else { //[ /happyaxis.jsp; Line: 129]
                return url.toString(); //[ /happyaxis.jsp; Line: 130]
            } //[ /happyaxis.jsp; Line: 131]
        } catch (Throwable t){ //[ /happyaxis.jsp; Line: 132]
        } //[ /happyaxis.jsp; Line: 133]
        return null; //[ /happyaxis.jsp; Line: 134]
    } //[ /happyaxis.jsp; Line: 135]
    //[ /happyaxis.jsp; Line: 136]
    /** //[ /happyaxis.jsp; Line: 137]
    * a class we need if a class is missing //[ /happyaxis.jsp; Line: 138]
    * @param out stream to print stuff //[ /happyaxis.jsp; Line: 139]
    * @param classname class to look for //[ /happyaxis.jsp; Line: 140]
    * @param jarFile where this class comes from //[ /happyaxis.jsp; Line: 141]
    * @param errorText extra error text //[ /happyaxis.jsp; Line: 142]
    * @param homePage where to d/l the library //[ /happyaxis.jsp; Line: 143]
    * @throws IOException when needed //[ /happyaxis.jsp; Line: 144]
    * @return the number of missing libraries (0 or 1) //[ /happyaxis.jsp; Line: 145]
    */ //[ /happyaxis.jsp; Line: 146]
    int needClass(JspWriter out, //[ /happyaxis.jsp; Line: 147]
    String classname, //[ /happyaxis.jsp; Line: 148]
    String jarFile, //[ /happyaxis.jsp; Line: 149]
    String description, //[ /happyaxis.jsp; Line: 150]
    String errorText, //[ /happyaxis.jsp; Line: 151]
    String homePage) throws IOException { //[ /happyaxis.jsp; Line: 152]
        return probeClass(out, //[ /happyaxis.jsp; Line: 153]
        "<b>Error</b>", //[ /happyaxis.jsp; Line: 154]
        classname, //[ /happyaxis.jsp; Line: 155]
        jarFile, //[ /happyaxis.jsp; Line: 156]
        description, //[ /happyaxis.jsp; Line: 157]
        errorText, //[ /happyaxis.jsp; Line: 158]
        homePage); //[ /happyaxis.jsp; Line: 159]
    } //[ /happyaxis.jsp; Line: 160]
    //[ /happyaxis.jsp; Line: 161]
    /** //[ /happyaxis.jsp; Line: 162]
    * print warning message if a class is missing //[ /happyaxis.jsp; Line: 163]
    * @param out stream to print stuff //[ /happyaxis.jsp; Line: 164]
    * @param classname class to look for //[ /happyaxis.jsp; Line: 165]
    * @param jarFile where this class comes from //[ /happyaxis.jsp; Line: 166]
    * @param errorText extra error text //[ /happyaxis.jsp; Line: 167]
    * @param homePage where to d/l the library //[ /happyaxis.jsp; Line: 168]
    * @throws IOException when needed //[ /happyaxis.jsp; Line: 169]
    * @return the number of missing libraries (0 or 1) //[ /happyaxis.jsp; Line: 170]
    */ //[ /happyaxis.jsp; Line: 171]
    int wantClass(JspWriter out, //[ /happyaxis.jsp; Line: 172]
    String classname, //[ /happyaxis.jsp; Line: 173]
    String jarFile, //[ /happyaxis.jsp; Line: 174]
    String description, //[ /happyaxis.jsp; Line: 175]
    String errorText, //[ /happyaxis.jsp; Line: 176]
    String homePage) throws IOException { //[ /happyaxis.jsp; Line: 177]
        return probeClass(out, //[ /happyaxis.jsp; Line: 178]
        "<b>Warning</b>", //[ /happyaxis.jsp; Line: 179]
        classname, //[ /happyaxis.jsp; Line: 180]
        jarFile, //[ /happyaxis.jsp; Line: 181]
        description, //[ /happyaxis.jsp; Line: 182]
        errorText, //[ /happyaxis.jsp; Line: 183]
        homePage); //[ /happyaxis.jsp; Line: 184]
    } //[ /happyaxis.jsp; Line: 185]
    //[ /happyaxis.jsp; Line: 186]
    /** //[ /happyaxis.jsp; Line: 187]
    * probe for a resource existing, //[ /happyaxis.jsp; Line: 188]
    * @param out //[ /happyaxis.jsp; Line: 189]
    * @param resource //[ /happyaxis.jsp; Line: 190]
    * @param errorText //[ /happyaxis.jsp; Line: 191]
    * @throws Exception //[ /happyaxis.jsp; Line: 192]
    */ //[ /happyaxis.jsp; Line: 193]
    int wantResource(JspWriter out, //[ /happyaxis.jsp; Line: 194]
    String resource, //[ /happyaxis.jsp; Line: 195]
    String errorText) throws Exception { //[ /happyaxis.jsp; Line: 196]
        if(!resourceExists(resource)) { //[ /happyaxis.jsp; Line: 197]
            out.write("<p><b>Warning</b>: could not find resource "+resource //[ /happyaxis.jsp; Line: 198]
            +"<br>" //[ /happyaxis.jsp; Line: 199]
            +errorText); //[ /happyaxis.jsp; Line: 200]
            return 0; //[ /happyaxis.jsp; Line: 201]
        } else { //[ /happyaxis.jsp; Line: 202]
            out.write("found "+resource+"<br>"); //[ /happyaxis.jsp; Line: 203]
            return 1; //[ /happyaxis.jsp; Line: 204]
        } //[ /happyaxis.jsp; Line: 205]