resources/code/ExampleTaglet.java

/*
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 * without modification, are permitted provided that the following
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 * contributors may be used to endorse or promote products derived
 * from this software without specific prior written permission.
 *
 * This software is provided "AS IS," without a warranty of any
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import com.sun.tools.doclets.Taglet;
import com.sun.javadoc.*;
import java.util.Map;
import java.io.*;
/**
 * A sample Taglet representing @example. This tag can be used in any kind of
 * {@link com.sun.javadoc.Doc}.  It is not an inline tag. The text is displayed
 * in yellow to remind the developer to perform a task.  For
 * example, "@example Hello" would be shown as:
 * <DL>
 * <DT>
 * <B>To Do:</B>
 * <DD><table cellpadding=2 cellspacing=0><tr><td bgcolor="yellow">Fix this!
 * </td></tr></table></DD>
 * </DL>
 *
 * @author Jamie Ho
 * @since 1.4
 */

public class ExampleTaglet implements Taglet {
    
    private static final String NAME = "example";
    private static final String HEADER = "example To Do:";

    /**
     * Return the name of this custom tag.
     */
    public String getName() {
        return NAME;
    }
    
    /**
     * Will return true since <code>@example</code>
     * can be used in field documentation.
     * @return true since <code>@example</code>
     * can be used in field documentation and false
     * otherwise.
     */
    public boolean inField() {
        return true;
    }

    /**
     * Will return true since <code>@example</code>
     * can be used in constructor documentation.
     * @return true since <code>@example</code>
     * can be used in constructor documentation and false
     * otherwise.
     */
    public boolean inConstructor() {
        return true;
    }
    
    /**
     * Will return true since <code>@example</code>
     * can be used in method documentation.
     * @return true since <code>@example</code>
     * can be used in method documentation and false
     * otherwise.
     */
    public boolean inMethod() {
        return true;
    }
    
    /**
     * Will return true since <code>@example</code>
     * can be used in method documentation.
     * @return true since <code>@example</code>
     * can be used in overview documentation and false
     * otherwise.
     */
    public boolean inOverview() {
        return true;
    }

    /**
     * Will return true since <code>@example</code>
     * can be used in package documentation.
     * @return true since <code>@example</code>
     * can be used in package documentation and false
     * otherwise.
     */
    public boolean inPackage() {
        return true;
    }

    /**
     * Will return true since <code>@example</code>
     * can be used in type documentation (classes or interfaces).
     * @return true since <code>@example</code>
     * can be used in type documentation and false
     * otherwise.
     */
    public boolean inType() {
        return true;
    }
    
    /**
     * Will return false since <code>@example</code>
     * is not an inline tag.
     * @return false since <code>@example</code>
     * is not an inline tag.
     */
    
    public boolean isInlineTag() {
        return false;
    }
    
    /**
     * Register this Taglet.
     * @param tagletMap  the map to register this tag to.
     */
    public static void register(Map tagletMap) {
       ExampleTaglet tag = new ExampleTaglet();
       Taglet t = (Taglet) tagletMap.get(tag.getName());
       if (t != null) {
           tagletMap.remove(tag.getName());
       }
       tagletMap.put(tag.getName(), tag);
    }

    /**
     * Given the <code>Tag</code> representation of this custom
     * tag, return its string representation.
     * @param tag   the <code>Tag</code> representation of this custom tag.
     */
    public String toString(Tag tag) {
        return createHTML(readFile(tag.text()));
    }
     
    
    /**
     * Given an array of <code>Tag</code>s representing this custom
     * tag, return its string representation.
     * @param tags  the array of <code>Tag</code>s representing of this custom tag.
     */
    public String toString(Tag[] tags) {
        if (tags.length == 0) {
            return null;
        }
                return createHTML(readFile(tags[0].text()));
    }
    
    
    
    String createHTML(String theString) {
        if(theString!=null) {
        String dd = "<script type=\"text/javascript\">\n" +
                                "<!--\n"+ 
                                "document.getElementsByTagName('html')[0].className = 'isjs';" +
                                        "function toggle(dt) { var display, dd=dt; do{ dd = dd.nextSibling } while(dd.tagName!='DD'); toOpen =!dd.style.display;" +
                                        "dd.style.display = toOpen? 'block':''; dt.getElementsByTagName('span')[0].innerHTML  = toOpen? '-':'+' ; }\n" +
                                        "-->\n</script>";

                return dd+"\n<div id=\"test\" class=\"toggleList\">" +
                "<dl><dt onclick=\"toggle(this);\"><span>+</span>Example</dt>" +
                "<dd><pre>"+theString+"</pre>" +
                "</dd></dl></div>";
                } 
        return "";
    }
    
    
    /**
     * check if the examples directory exists and return the example as given in the tag.
     * @param theExample the name of the example
     */
     String readFile(String theExample) { 
                String record = "";
                String myResult = "";
                int recCount = 0;
                String myDir = "../examples";
                File file=new File(myDir);
                if(file.exists()==false) {
                        myDir = "./examples";
                }
        try { 
                        FileReader fr = new FileReader(myDir+"/"+theExample+"/"+theExample+".pde");
                        BufferedReader br = new BufferedReader(fr);
                        record = new String();
                        while ((record = br.readLine()) != null) {
                                myResult += record+"\n";
                        } 
                } catch (IOException e) { 
                        System.out.println(e);
                        return null;
                }
                return myResult;
     }
}

