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The source code

/*   
 *  Copyright 2001-2004 The Apache Sofware Foundation.
 *
 *  Licensed 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.tomcat.ant;

import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.types.CommandlineJava;
import org.apache.tools.ant.types.Path;
import org.apache.tools.ant.taskdefs.optional.jsp.JspC;
import org.apache.tools.ant.taskdefs.optional.jsp.JspMangler;
import org.apache.tools.ant.taskdefs.optional.jsp.JspNameMangler;
import org.apache.tools.ant.taskdefs.optional.jsp.compilers.DefaultJspCompilerAdapter;
import org.apache.tools.ant.taskdefs.Java;

import java.io.File;
import java.util.Enumeration;
import java.util.Vector;

/**
 * This compiler adaptor builds jsps with a naming convention that is
 * ready-to-use by Tomcat 3.x.  Files are compiled from foo.jsp
 * to foo_1.java.
 *
 * 

Use this task with the Tomcat3JSPVersionFile to create the appropriate * files to pre-populate the Tomcat work directory. * * @author Keith Wannamaker Keith@Apache.org * @since ant1.6 */ public class Tomcat3Precompiler extends DefaultJspCompilerAdapter { /** * our execute method which does dependency checks */ public boolean execute() throws BuildException { getJspc().log("Using Tomcat 3 precompiler", Project.MSG_VERBOSE); Vector sources = getJspc().getCompileList(); Enumeration enum = sources.elements(); while (enum.hasMoreElements()) { CommandlineJava cmd = setupJasperCommand(); String source = (String) enum.nextElement(); String base = getBase(source); String classname = base + "_1"; addArg(cmd, "-c", classname); cmd.createArgument().setValue(source); getJspc().log( "Compiling file [" + source + "] to class [" + classname + "]", Project.MSG_VERBOSE); compile(cmd); } return true; } /** Execute Jasper */ private boolean compile(CommandlineJava cmd) throws BuildException { try { // Create an instance of the compiler, redirecting output to // the project log // REVISIT. ugly. Java java = (Java) (getJspc().getProject()).createTask("java"); if (getJspc().getClasspath() != null) { java.setClasspath(getJspc().getClasspath()); } else { java.setClasspath(Path.systemClasspath); } java.setClassname("org.apache.jasper.JspC"); String args[] = cmd.getJavaCommand().getArguments(); for (int i = 0; i < args.length; i++) { java.createArg().setValue(args[i]); } java.setFailonerror(getJspc().getFailonerror()); //fork to catch JspC CompileExceptions java.setFork(true); java.execute(); return true; } catch (Exception ex) { //@todo implement failonerror support here? if (ex instanceof BuildException) { throw (BuildException) ex; } else { throw new BuildException("Error running jsp compiler: ", ex, getJspc().getLocation()); } } finally { getJspc().deleteEmptyJavaFiles(); } } /** * Returns filename sans extension and prefix */ private String getBase(String filename) { int lastslash = filename.lastIndexOf(File.separator); if (lastslash == -1) { lastslash = 0; } int lastdot = filename.lastIndexOf('.'); if (lastdot == -1) { lastdot = filename.length(); } return filename.substring(lastslash + 1, lastdot); } /** * build up a command line * @return a command line for jasper */ private CommandlineJava setupJasperCommand() { CommandlineJava cmd = new CommandlineJava(); JspC jspc = getJspc(); addArg(cmd, "-d", jspc.getDestdir()); addArg(cmd, "-p", jspc.getPackage()); addArg(cmd, "-v" + jspc.getVerbose()); addArg(cmd, "-uriroot", jspc.getUriroot()); addArg(cmd, "-ieplugin", jspc.getIeplugin()); addArg(cmd, "-die9"); if (jspc.isMapped()){ addArg(cmd, "-mapped"); } if (jspc.getWebApp() != null) { File dir = jspc.getWebApp().getDirectory(); addArg(cmd, "-webapp", dir); } return cmd; } /** * @return an instance of the mangler this compiler uses */ public JspMangler createMangler() { return new TomcatJSPMangler(); } /** * Special mangler which coverts *.jsp -> *_1.java */ private class TomcatJSPMangler implements JspMangler { public TomcatJSPMangler() { mangler = new JspNameMangler(); } public String mapJspToJavaName(File jspFile) { String javaFile = mangler.mapJspToJavaName(jspFile); int ext = javaFile.lastIndexOf(".java"); if (ext != -1) { javaFile = javaFile.substring(0, ext) + "_1.java"; } return javaFile; } public String mapPath(String path) { return mangler.mapPath(path); } private JspMangler mangler; } }

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