+ * The preprocessor looks for #ifdef statements in java comments, and is + * run with a set of symbols. For example: + *
+ * //#ifdef ex1 + * ... code to insert when 'ex1' symbol is on + * //#else + * ... code to insert when not 'ex1' + * //#endif + *+ * + */ +public class PreProcessor extends Task { + + private Vector fFileSets = new Vector(); + private File fDestDir = null; + private Set fSymbols = new HashSet(); + private FileUtils fUtils = FileUtils.getFileUtils(); + + // possible states + private static final int STATE_OUTSIDE_CONDITION = 0; + private static final int STATE_TRUE_CONDITION = 1; + private static final int STATE_FALSE_CONDITION = 2; + private static final int STATE_POST_TRUE_CONDITION = 3; + + // matchers + private Matcher IF_DEF_MATCHER = Pattern.compile("#ifdef\\s+\\w+").matcher(""); + private Matcher ELSE_IF_MATCHER = Pattern.compile("#elseif\\s+\\w+").matcher(""); + private Matcher ELSE_MATCHER = Pattern.compile("#else$|#else\\W+").matcher(""); + private Matcher END_MATCHER = Pattern.compile("#endif").matcher(""); + + + /** + * Constructs a new preprocessor task + */ + public PreProcessor() { + } + + /** + * Adds a set of files to process. + * + * @param set a set of files to process + */ + public void addFileset(FileSet set) { + fFileSets.addElement(set); + } + + /** + * Sets the destination directory for processed files. + * + * @param destDir destination directory for processed files + */ + public void setDestdir(File destDir) { + fDestDir = destDir; + } + + /** + * Sets the symbols that are "on" for the preprocessing. + * + * @param symbols symbols that are "on" for the preprocessing + */ + public void setSymbols(String symbols) { + String[] strings = symbols.split(","); + for (int i = 0; i < strings.length; i++) { + String string = strings[i].trim(); + if (string.length() > 0) { + fSymbols.add(string); + } + } + } + + public void execute() throws BuildException { + if (fSymbols.size() == 0) { + throw new BuildException("No symbols specified for preprocessor"); + } + if (fFileSets.isEmpty()) { + throw new BuildException("No filesets specified for processing"); + } + if (!fDestDir.exists()) { + throw new BuildException("destdir does not exist: " + fDestDir.getAbsolutePath()); + } + StringBuffer buf = new StringBuffer("Symbols: "); + String[] symbols = (String[]) fSymbols.toArray(new String[fSymbols.size()]); + for (int i = 0; i < symbols.length; i++) { + String symbol = symbols[i]; + buf.append(symbol); + if(i < (symbols.length -1)) { + buf.append(", "); + } + } + log(buf.toString()); + + Iterator fileSets = fFileSets.iterator(); + while (fileSets.hasNext()) { + FileSet fileSet = (FileSet) fileSets.next(); + DirectoryScanner scanner = fileSet.getDirectoryScanner(getProject()); + String[] includedFiles = scanner.getIncludedFiles(); + File baseDir = fileSet.getDir(getProject()); + for (int i = 0; i < includedFiles.length; i++) { + String fileName = includedFiles[i]; + processFile(baseDir, fileName, fDestDir); + } + } + + } + + /** + * Process the file + * @param baseDir base directory source file is relative to + * @param fileName source file name + * @param destDir root destination directory + */ + private void processFile(File baseDir, String fileName, File destDir) throws BuildException { + File destFile = new File(destDir, fileName); + File srcFile = new File(baseDir, fileName); + File dir = destFile.getParentFile(); + if (!dir.exists()) { + dir.mkdirs(); + } + String contents = null; + if (fileName.endsWith(".java")) { + contents = preProcessFile(srcFile, "//#"); + } else if (fileName.equals("plugin.xml")) { + contents = preProcessFile(srcFile, null); + } + if (contents == null) { + // no change, just copy file + try { + fUtils.copyFile(srcFile, destFile); + } catch (IOException e) { + throw new BuildException(e); + } + } else { + // write new file + FileWriter writer; + try { + writer = new FileWriter(destFile); + writer.write(contents); + writer.close(); + } catch (IOException e) { + throw new BuildException(e); + } + + } + } + + /** + * Preprocesses a file + * + * @param srcFile the file to process + * @param strip chars to stip off lines in a true condition, or
null
+ * @return
+ */
+ public String preProcessFile(File srcFile, String strip) {
+ try {
+ FileReader fileReader = new FileReader(srcFile);
+ BufferedReader reader = new BufferedReader(fileReader);
+ StringBuffer buffer = new StringBuffer();
+ String line = reader.readLine();
+ String activeSymbol = null;
+ int state = STATE_OUTSIDE_CONDITION;
+ boolean changed = false;
+ while (line != null) {
+ boolean ifdef = IF_DEF_MATCHER.reset(line).find();
+ boolean elseif = ELSE_IF_MATCHER.reset(line).find();
+ boolean elze = ELSE_MATCHER.reset(line).find();
+ boolean endif = END_MATCHER.reset(line).find();
+ boolean commandLine = ifdef || elseif || elze || endif;
+ boolean written = false;
+ switch (state) {
+ case STATE_OUTSIDE_CONDITION:
+ if (ifdef) {
+ String condition = line.substring(IF_DEF_MATCHER.start(), IF_DEF_MATCHER.end());
+ String[] strings = condition.split("\\s+");
+ activeSymbol = strings[1].trim();
+ if (fSymbols.contains(activeSymbol)) {
+ state = STATE_TRUE_CONDITION;
+ } else {
+ state = STATE_FALSE_CONDITION;
+ }
+ } else if (elseif) {
+ throw new BuildException("#elseif encountered without corresponding #ifdef");
+ } else if (elze) {
+ throw new BuildException("#else encountered without corresponding #ifdef (" + srcFile.getPath() + ")");
+ } else if (endif) {
+ throw new BuildException("#endif encountered without corresponding #ifdef");
+ }
+ break;
+ case STATE_TRUE_CONDITION:
+ if (elze || elseif) {
+ state = STATE_POST_TRUE_CONDITION;
+ break;
+ } else if (endif) {
+ state = STATE_OUTSIDE_CONDITION;
+ break;
+ } else if (ifdef) {
+ throw new BuildException("illegal nested #ifdef");
+ }
+ case STATE_FALSE_CONDITION:
+ if (elseif) {
+ String condition = line.substring(ELSE_IF_MATCHER.start(), ELSE_IF_MATCHER.end());
+ String[] strings = condition.split("\\s+");
+ activeSymbol = strings[1].trim();
+ if (fSymbols.contains(activeSymbol)) {
+ state = STATE_TRUE_CONDITION;
+ } else {
+ state = STATE_FALSE_CONDITION;
+ }
+ } else if (elze) {
+ state = STATE_TRUE_CONDITION;
+ break;
+ } else if (endif) {
+ state = STATE_OUTSIDE_CONDITION;
+ break;
+ } else if (ifdef) {
+ throw new BuildException("illegal nested #ifdef");
+ }
+ case STATE_POST_TRUE_CONDITION:
+ if (endif) {
+ state = STATE_OUTSIDE_CONDITION;
+ break;
+ } else if (ifdef) {
+ throw new BuildException("illegal nested #ifdef");
+ }
+ }
+ if (!commandLine) {
+ if (state == STATE_OUTSIDE_CONDITION || state == STATE_TRUE_CONDITION) {
+ if (state == STATE_TRUE_CONDITION && strip != null) {
+ if (line.startsWith(strip)) {
+ line = line.substring(strip.length());
+ }
+ }
+ buffer.append(line);
+ buffer.append("\n");
+ written = true;
+ }
+ }
+ changed = changed || !written;
+ line = reader.readLine();
+ }
+ if (!changed) {
+ return null;
+ }
+ return buffer.toString();
+ } catch (IOException e) {
+ throw new BuildException(e);
+ }
+ }
+
+ public static void main(String[] args) {
+ PreProcessor processor = new PreProcessor();
+ processor.setSymbols("ex2");
+ String string = processor.preProcessFile(new File("c:\\eclipse3.1\\dev\\example.debug.core\\src\\example\\debug\\core\\launcher\\PDALaunchDelegate.java"), "//#");
+ //String string = processor.preProcessFile(new File("c:\\eclipse3.1\\dev\\example.debug.core\\plugin.xml"), null);
+ System.out.println(string);
+ }
+}
diff --git a/plugins/org.eclipse.dd.examples.dsf/src_preprocess/org/eclipse/dd/examples/dsf/requestmonitor/AsyncHelloWorld.java b/plugins/org.eclipse.dd.examples.dsf/src_preprocess/org/eclipse/dd/examples/dsf/requestmonitor/AsyncHelloWorld.java
new file mode 100644
index 00000000000..b7c10afb29e
--- /dev/null
+++ b/plugins/org.eclipse.dd.examples.dsf/src_preprocess/org/eclipse/dd/examples/dsf/requestmonitor/AsyncHelloWorld.java
@@ -0,0 +1,59 @@
+/*******************************************************************************
+ * Copyright (c) 2008 Wind River Systems and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ * Wind River Systems - initial API and implementation
+ *******************************************************************************/
+//#ifdef request_monitors_ex1
+//#package org.eclipse.dd.examples.dsf.requestmonitor.excercise;
+//#else
+package org.eclipse.dd.examples.dsf.requestmonitor.answer;
+//#endif
+
+import java.util.concurrent.Executor;
+
+import org.eclipse.dd.dsf.concurrent.ImmediateExecutor;
+import org.eclipse.dd.dsf.concurrent.RequestMonitor;
+
+/**
+ * "Hello world" example which uses an asynchronous method to print out
+ * the result.
+ * + * The main method uses an immediate executor, which executes runnables + * as soon as they are submitted, in creating its request monitor. + * + */ +public class AsyncHelloWorld { + + public static void main(String[] args) { + Executor executor = ImmediateExecutor.getInstance(); + RequestMonitor rm = new RequestMonitor(executor, null); + asyncHelloWorld(rm); + } + + static void asyncHelloWorld(RequestMonitor rm) { + System.out.println("Hello world"); + //#ifdef request_monitors_ex1 +//# // TODO: Request Monitors Exercise 1 - Call a second async. +//# // "Hello world 2" method. +//# rm.done(); + //#else + RequestMonitor rm2 = new RequestMonitor(ImmediateExecutor.getInstance(), rm); + asyncHelloWorld2(rm2); + //#endif + } + + //#ifdef request_monitors_ex1 +//# // TODO: Request Monitors Exercise 1 - Add a second async. +//# // "Hello world 2" method. + //#else + static void asyncHelloWorld2(RequestMonitor rm) { + System.out.println("Hello world 2"); + rm.done(); + } + //#endif +}