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Tomcat example source code file (DebugValidator.java)

This example Tomcat source code file (DebugValidator.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Tomcat tags/keywords

debugvalidator, debugvalidator, inputstream, inputstream, io, ioexception, ioexception, jsp, pagedata, pagedata, servlet, string, taglibraryvalidator, validationmessage

The Tomcat DebugValidator.java source code

/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements.  See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License.  You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/


package validators;


import java.io.InputStream;
import java.io.IOException;
import javax.servlet.jsp.tagext.PageData;
import javax.servlet.jsp.tagext.TagLibraryValidator;
import javax.servlet.jsp.tagext.ValidationMessage;


/**
 * Example tag library validator that simply dumps the XML version of each
 * page to standard output (which will typically be sent to the file
 * <code>$CATALINA_HOME/logs/catalina.out).  To utilize it, simply
 * include a <code>taglib directive for this tag library at the top
 * of your JSP page.
 *
 * @author Craig McClanahan
 * @version $Revision: 467217 $ $Date: 2006-10-24 05:14:34 +0200 (mar., 24 oct. 2006) $
 */

public class DebugValidator extends TagLibraryValidator {


    // ----------------------------------------------------- Instance Variables


    // --------------------------------------------------------- Public Methods


    /**
     * Validate a JSP page.  This will get invoked once per directive in the
     * JSP page.  This method will return <code>null if the page is
     * valid; otherwise the method should return an array of
     * <code>ValidationMessage objects.  An array of length zero is
     * also interpreted as no errors.
     *
     * @param prefix The value of the prefix argument in this directive
     * @param uri The value of the URI argument in this directive
     * @param page The page data for this page
     */
    public ValidationMessage[] validate(String prefix, String uri,
                                        PageData page) {

        System.out.println("---------- Prefix=" + prefix + " URI=" + uri +
                           "----------");

        InputStream is = page.getInputStream();
        while (true) {
            try {
                int ch = is.read();
                if (ch < 0)
                    break;
                System.out.print((char) ch);
            } catch (IOException e) {
                break;
            }
        }
        System.out.println();
        System.out.println("-----------------------------------------------");
        return (null);

    }


}

Other Tomcat examples (source code examples)

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