Examples of javax.servlet.jsp.tagext.TagExtraInfo

javax.servlet.jsp.tagext.TagExtraInfo
Optional class provided by the tag library author to describe additional translation-time information not described in the TLD. The TagExtraInfo class is mentioned in the Tag Library Descriptor file (TLD).
This class can be used:
- to indicate that the tag defines scripting variables
- to perform translation-time validation of the tag attributes.
It is the responsibility of the JSP translator that the initial value to be returned by calls to getTagInfo() corresponds to a TagInfo object for the tag being translated. If an explicit call to setTagInfo() is done, then the object passed will be returned in subsequent calls to getTagInfo().
The only way to affect the value returned by getTagInfo() is through a setTagInfo() call, and thus, TagExtraInfo.setTagInfo() is to be called by the JSP translator, with a TagInfo object that corresponds to the tag being translated. The call should happen before any invocation on isValid() and before any invocation on getVariableInfo().

            TagData tagData = new TagData(tagDataAttrs);


            // JSP.C1: It is a (translation time) error for an action that
            // has one or more variable subelements to have a TagExtraInfo
            // class that returns a non-null object.
            TagExtraInfo tei = tagInfo.getTagExtraInfo();
            if (tei != null && tei.getVariableInfo(tagData) != null
                    && tei.getVariableInfo(tagData).length > 0
                    && tagInfo.getTagVariableInfos().length > 0) {
                err.jspError("jsp.error.non_null_tei_and_var_subelems", n
                        .getQName());
            }

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                            "jsp.warning.unknown.element.in.tag", tname));
                }
            }
        }


        TagExtraInfo tei = null;
        if (teiClassName != null && !teiClassName.equals("")) {
            try {
                Class teiClass = ctxt.getClassLoader().loadClass(teiClassName);
                tei = (TagExtraInfo) teiClass.newInstance();
            } catch (Exception e) {

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      TagData tagData = new TagData(tagDataAttrs);


      // JSP.C1: It is a (translation time) error for an action that
      // has one or more variable subelements to have a TagExtraInfo
      // class that returns a non-null object.
      TagExtraInfo tei = tagInfo.getTagExtraInfo();
      if (tei != null
        && tei.getVariableInfo(tagData) != null
        && tei.getVariableInfo(tagData).length > 0
        && tagInfo.getTagVariableInfos().length > 0) {
    err.jspError("jsp.error.non_null_tei_and_var_subelems",
           n.getQName());
      }

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                            "jsp.warning.unknown.element.in.tag", tname));
                }
            }
        }


        TagExtraInfo tei = null;
        if (teiClassName != null && !teiClassName.equals("")) {
            try {
                Class<?> teiClass =
                    ctxt.getClassLoader().loadClass(teiClassName);
                tei = (TagExtraInfo) teiClass.newInstance();

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            TagData tagData = new TagData(tagDataAttrs);


            // JSP.C1: It is a (translation time) error for an action that
            // has one or more variable subelements to have a TagExtraInfo
            // class that returns a non-null object.
            TagExtraInfo tei = tagInfo.getTagExtraInfo();
            if (tei != null && tei.getVariableInfo(tagData) != null
                    && tei.getVariableInfo(tagData).length > 0
                    && tagInfo.getTagVariableInfos().length > 0) {
                err.jspError("jsp.error.non_null_tei_and_var_subelems", n
                        .getQName());
            }

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       */
      teiClass = Class.forName(teiClassname, true, loader);
      if (teiClass != null) {
        Object teiObject = teiClass.newInstance();
        if (TagExtraInfo.class.isInstance(teiObject)) {
          TagExtraInfo tei = (TagExtraInfo) teiObject;
          Hashtable tagDataTable = extractTagData(customTag);
          TagInfo info = getTagInfo(decl, tei, prefix, uri);
          if (info != null) {
            tei.setTagInfo(info);


            // add to results
            TagData td = new TagData(tagDataTable);


            VariableInfo[] vInfos = tei.getVariableInfo(td);
            if (vInfos != null) {
              for (int i = 0; i < vInfos.length; i++) {
                results.add(new TaglibVariable(vInfos[i].getClassName(), vInfos[i].getVarName(), vInfos[i].getScope(), decl.getDescription()));
              }
            }


            ValidationMessage[] messages = tei.validate(td);
            if (messages != null && messages.length > 0) {
              for (int i = 0; i < messages.length; i++) {
                Object createdProblem = createValidationMessageProblem(document, customTag, messages[i].getMessage());
                if (createdProblem != null) {
                  problems.add(createdProblem);

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       */
      teiClass = Class.forName(teiClassname, true, loader);
      if (teiClass != null) {
        Object teiObject = teiClass.newInstance();
        if (TagExtraInfo.class.isInstance(teiObject)) {
          TagExtraInfo tei = (TagExtraInfo) teiObject;
          Hashtable tagDataTable = extractTagData(customTag);
          TagInfo info = getTagInfo(decl, tei, prefix, uri);
          if (info != null) {
            tei.setTagInfo(info);


            // add to results
            TagData td = new TagData(tagDataTable);


            VariableInfo[] vInfos = tei.getVariableInfo(td);
            if (vInfos != null) {
              for (int i = 0; i < vInfos.length; i++) {
                results.add(new TaglibVariable(vInfos[i].getClassName(), vInfos[i].getVarName(), vInfos[i].getScope(), decl.getDescription()));
              }
            }


            ValidationMessage[] messages = tei.validate(td);
            if (messages != null && messages.length > 0) {
              for (int i = 0; i < messages.length; i++) {
                Object createdProblem = createValidationMessageProblem(document, customTag, messages[i].getMessage());
                if (createdProblem != null) {
                  problems.add(createdProblem);

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            TagData tagData = new TagData(tagDataAttrs);


            // JSP.C1: It is a (translation time) error for an action that
            // has one or more variable subelements to have a TagExtraInfo
            // class that returns a non-null object.
            TagExtraInfo tei = tagInfo.getTagExtraInfo();
            if (tei != null && tei.getVariableInfo(tagData) != null
                    && tei.getVariableInfo(tagData).length > 0
                    && tagInfo.getTagVariableInfos().length > 0) {
                err.jspError("jsp.error.non_null_tei_and_var_subelems", n
                        .getQName());
            }

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        }
  TagAttributeInfo[] tagAttributeInfo 
            = new TagAttributeInfo[attributeVector.size()];
  attributeVector.copyInto (tagAttributeInfo);


        TagExtraInfo tei = null;


        if (teiclass != null && !teiclass.equals(""))
            try {
                Class teiClass = ctxt.getClassLoader().loadClass(teiclass);
                tei = (TagExtraInfo) teiClass.newInstance();

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                            "jsp.warning.unknown.element.in.tag", tname));
                }
            }
        }


        TagExtraInfo tei = null;
        if (teiClassName != null && !teiClassName.equals("")) {
            try {
                Class teiClass = ctxt.getClassLoader().loadClass(teiClassName);
                tei = (TagExtraInfo) teiClass.newInstance();
            } catch (Exception e) {

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