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Tomcat example source code file (Dumper.java)

This example Tomcat source code file (Dumper.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

attributes, dumper, dumpvisitor, dumpvisitor, jasperexception, jasperexception, sax, string, string, stringbuffer, stringbuffer

The Tomcat Dumper.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 org.apache.jasper.compiler;

import org.xml.sax.Attributes;
import org.apache.jasper.JasperException;

class Dumper {

    static class DumpVisitor extends Node.Visitor {
	private int indent = 0;

	private String getAttributes(Attributes attrs) {
	    if (attrs == null)
		return "";

	    StringBuffer buf = new StringBuffer();
	    for (int i=0; i < attrs.getLength(); i++) {
		buf.append(" " + attrs.getQName(i) + "=\""
			   + attrs.getValue(i) + "\"");
	    }
	    return buf.toString();
	}

	private void printString(String str) {
	    printIndent();
	    System.out.print(str);
	}

	private void printString(String prefix, char[] chars, String suffix) {
	    String str = null;
	    if (chars != null) {
		str = new String(chars);
	    }
	    printString(prefix, str, suffix);
	}
	     
	private void printString(String prefix, String str, String suffix) {
	    printIndent();
	    if (str != null) {
		System.out.print(prefix + str + suffix);
	    } else {
		System.out.print(prefix + suffix);
	    }
	}

	private void printAttributes(String prefix, Attributes attrs,
				     String suffix) {
	    printString(prefix, getAttributes(attrs), suffix);
	}

	private void dumpBody(Node n) throws JasperException {
	    Node.Nodes page = n.getBody();
	    if (page != null) {
//		indent++;
		page.visit(this);
//		indent--;
	    }
        }

        public void visit(Node.PageDirective n) throws JasperException {
	    printAttributes("<%@ page", n.getAttributes(), "%>");
        }

        public void visit(Node.TaglibDirective n) throws JasperException {
	    printAttributes("<%@ taglib", n.getAttributes(), "%>");
        }

        public void visit(Node.IncludeDirective n) throws JasperException {
	    printAttributes("<%@ include", n.getAttributes(), "%>");
	    dumpBody(n);
        }

        public void visit(Node.Comment n) throws JasperException {
	    printString("<%--", n.getText(), "--%>");
        }

        public void visit(Node.Declaration n) throws JasperException {
	    printString("<%!", n.getText(), "%>");
        }

        public void visit(Node.Expression n) throws JasperException {
	    printString("<%=", n.getText(), "%>");
        }

        public void visit(Node.Scriptlet n) throws JasperException {
	    printString("<%", n.getText(), "%>");
        }

        public void visit(Node.IncludeAction n) throws JasperException {
	    printAttributes("<jsp:include", n.getAttributes(), ">");
	    dumpBody(n);
            printString("</jsp:include>");
        }

        public void visit(Node.ForwardAction n) throws JasperException {
	    printAttributes("<jsp:forward", n.getAttributes(), ">");
	    dumpBody(n);
	    printString("</jsp:forward>");
        }

        public void visit(Node.GetProperty n) throws JasperException {
	    printAttributes("<jsp:getProperty", n.getAttributes(), "/>");
        }

        public void visit(Node.SetProperty n) throws JasperException {
	    printAttributes("<jsp:setProperty", n.getAttributes(), ">");
            dumpBody(n);
            printString("</jsp:setProperty>");
        }

        public void visit(Node.UseBean n) throws JasperException {
	    printAttributes("<jsp:useBean", n.getAttributes(), ">");
	    dumpBody(n);
	    printString("</jsp:useBean>");
        }
	
        public void visit(Node.PlugIn n) throws JasperException {
	    printAttributes("<jsp:plugin", n.getAttributes(), ">");
	    dumpBody(n);
	    printString("</jsp:plugin>");
	}
        
        public void visit(Node.ParamsAction n) throws JasperException {
	    printAttributes("<jsp:params", n.getAttributes(), ">");
	    dumpBody(n);
	    printString("</jsp:params>");
        }
        
        public void visit(Node.ParamAction n) throws JasperException {
	    printAttributes("<jsp:param", n.getAttributes(), ">");
	    dumpBody(n);
	    printString("</jsp:param>");
        }
        
        public void visit(Node.NamedAttribute n) throws JasperException {
	    printAttributes("<jsp:attribute", n.getAttributes(), ">");
	    dumpBody(n);
	    printString("</jsp:attribute>");
        }

        public void visit(Node.JspBody n) throws JasperException {
	    printAttributes("<jsp:body", n.getAttributes(), ">");
	    dumpBody(n);
	    printString("</jsp:body>");
        }
        
        public void visit(Node.ELExpression n) throws JasperException {
	    printString( "${" + new String( n.getText() ) + "}" );
        }

        public void visit(Node.CustomTag n) throws JasperException {
	    printAttributes("<" + n.getQName(), n.getAttributes(), ">");
	    dumpBody(n);
	    printString("</" + n.getQName() + ">");
        }

	public void visit(Node.UninterpretedTag n) throws JasperException {
	    String tag = n.getQName();
	    printAttributes("<"+tag, n.getAttributes(), ">");
	    dumpBody(n);
	    printString("</" + tag + ">");
        }

	public void visit(Node.TemplateText n) throws JasperException {
	    printString(new String(n.getText()));
	}

	private void printIndent() {
	    for (int i=0; i < indent; i++) {
		System.out.print("  ");
	    }
	}
    }

    public static void dump(Node n) {
	try {
	    n.accept(new DumpVisitor());	
	} catch (JasperException e) {
	    e.printStackTrace();
	}
    }

    public static void dump(Node.Nodes page) {
	try {
	    page.visit(new DumpVisitor());
	} catch (JasperException e) {
	    e.printStackTrace();
	}
    }
}

Other Tomcat examples (source code examples)

Here is a short list of links related to this Tomcat Dumper.java source code file:

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