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CHAPTER 8 Using JavaBeans with tags Listing 8.5 Source code for the ShowTag handler class package book.reflection; import book.util.LocalStrings; import javax.servlet.jsp.JspException; public class ShowTag extends ReflectionTag { static LocalStrings ls = LocalStrings.getLocalStrings(ShowTag.class); protected void processObject(Object v) b throws JspException { try { writeHtml(pageContext.getOut(), v.toString()); } catch(java.io.IOException ioe) { // User probably disconnected … // Log and throw an exception } } } B Overrides processObject() to print the property value. TagExraInfo for ShowTag The last portion of code left unseen is the TagExtraInfo that we shall attach to the ShowTag. In fact, since ShowTag does not add any new attribute or syntactic constraints, we can actually take a TagExtraInfo, as developed for ReflectionTag, and use it for ShowTag (listing 8.6). Listing 8.6 Source code for the ReflectionTagExtraInfo class package book.reflection; import javax.servlet.jsp.tagext.TagData; import javax.servlet.jsp.tagext.TagExtraInfo; import javax.servlet.jsp.tagext.VariableInfo; public class ReflectionTagExtraInfo extends TagExtraInfo { public boolean isValid(TagData data) { Object o = data.getAttribute(”object”); if((o != null) && (o != TagData.REQUEST_TIME_VALUE)) { b return false; }

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