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Tomcat example source code file (

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

Java - Tomcat tags/keywords

arraylist, c, java, jsp, jsp, list, smapgenerator, smapgenerator, smapstratum, smapstratum, string, string, stringbuffer, tier2, util

The Tomcat 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
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.

package org.apache.jasper.compiler;

import java.util.List;
import java.util.ArrayList;

 * Represents a source map (SMAP), which serves to associate lines
 * of the input JSP file(s) to lines in the generated servlet in the
 * final .class file, according to the JSR-045 spec.
 * @author Shawn Bayern
public class SmapGenerator {

    // Overview

     * The SMAP syntax is reasonably straightforward.  The purpose of this
     * class is currently twofold:
     *  - to provide a simple but low-level Java interface to build
     *    a logical SMAP
     *  - to serialize this logical SMAP for eventual inclusion directly
     *    into a .class file.

    // Private state

    private String outputFileName;
    private String defaultStratum = "Java";
    private List strata = new ArrayList();
    private List embedded = new ArrayList();
    private boolean doEmbedded = true;

    // Methods for adding mapping data

     * Sets the filename (without path information) for the generated
     * source file.  E.g., "foo$".
    public synchronized void setOutputFileName(String x) {
	outputFileName = x;

     * Adds the given SmapStratum object, representing a Stratum with
     * logically associated FileSection and LineSection blocks, to
     * the current SmapGenerator.  If <tt>default is true, this
     * stratum is made the default stratum, overriding any previously
     * set default.
     * @param stratum the SmapStratum object to add
     * @param defaultStratum if <tt>true, this SmapStratum is considered
     *                to represent the default SMAP stratum unless
     *                overwritten
    public synchronized void addStratum(SmapStratum stratum,
					boolean defaultStratum) {
	if (defaultStratum)
	    this.defaultStratum = stratum.getStratumName();

     * Adds the given string as an embedded SMAP with the given stratum name.
     * @param smap the SMAP to embed
     * @param stratumName the name of the stratum output by the compilation
     *                    that produced the <tt>smap to be embedded
    public synchronized void addSmap(String smap, String stratumName) {
	embedded.add("*O " + stratumName + "\n"
		   + smap
		   + "*C " + stratumName + "\n");

     * Instructs the SmapGenerator whether to actually print any embedded
     * SMAPs or not.  Intended for situations without an SMAP resolver.
     * @param status If <tt>false, ignore any embedded SMAPs.
    public void setDoEmbedded(boolean status) {
	doEmbedded = status;

    // Methods for serializing the logical SMAP

    public synchronized String getString() {
	// check state and initialize buffer
	if (outputFileName == null)
	    throw new IllegalStateException();
        StringBuffer out = new StringBuffer();

	// start the SMAP
	out.append(outputFileName + '\n');
	out.append(defaultStratum + '\n');

	// include embedded SMAPs
	if (doEmbedded) {
	    int nEmbedded = embedded.size();
	    for (int i = 0; i < nEmbedded; i++) {

	// print our StratumSections, FileSections, and LineSections
	int nStrata = strata.size();
	for (int i = 0; i < nStrata; i++) {
	    SmapStratum s = (SmapStratum) strata.get(i);

	// end the SMAP

	return out.toString();

    public String toString() { return getString(); }

    // For testing (and as an example of use)...

    public static void main(String args[]) {
	SmapGenerator g = new SmapGenerator();
	SmapStratum s = new SmapStratum("JSP");
	s.addFile("bar.jsp", "/foo/foo/bar.jsp");
	s.addLineData(1, "foo.jsp", 1, 1, 1);
	s.addLineData(2, "foo.jsp", 1, 6, 1);
	s.addLineData(3, "foo.jsp", 2, 10, 5);
	s.addLineData(20, "bar.jsp", 1, 30, 1);
	g.addStratum(s, true);


	SmapGenerator embedded = new SmapGenerator();
	s = new SmapStratum("Tier2");
	s.addLineData(1, "1.tier2", 1, 1, 1);
	embedded.addStratum(s, true);
	g.addSmap(embedded.toString(), "JSP");

Other Tomcat examples (source code examples)

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

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