Backend refactoring: KjcEngine has been split up into separate classes for preprocessing, compiling, and running.

app/PdeCompiler.java

@@ -0,0 +1,85 @@
+// -*- Mode: JDE; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+
+import java.io.*;
+
+// This class will be the new default of Jikes.
+//
+public class PdeCompiler implements PdeMessageConsumer{
+
+  String buildPath;
+  String className;
+  PdeException exception;
+  PdeEditor editor;
+
+  public PdeCompiler(String buildPath, String className, PdeEditor editor) {
+    this.buildPath = buildPath;
+    this.className = className;
+    this.editor = editor;
+  }
+
+  public boolean compileJava(PrintStream leechErr) {
+    String command[] = new String[] { 
+      "jikes",
+      "+E", // output errors in machine-parsable format
+      "-d", buildPath, // output the classes in the buildPath
+      buildPath + File.separator + className + ".java" // file to compile
+    };
+
+    int result;
+    // XXXdmose try/catch should be separate
+    try { 
+      Process process = Runtime.getRuntime().exec(command);
+      // XXXdmose race condition?
+      new PdeMessageSiphon(process.getInputStream(),
+                           process.getErrorStream(),
+                           this);
+
+      result = process.waitFor();
+    } catch (Exception e) {
+      result = -1;
+    }
+    //System.err.println("result = " + result);
+
+    return result == 0 ? true : false;
+  }
+
+  // part of the PdeMessageConsumer interface
+  //
+  public void message(String s) {
+
+    // as in: lib\build\Temporary_5476_6442.java:88: caution:Assignment of an expression to itself [KOPI]
+    if (s.indexOf("caution") != -1) return;
+
+    // jikes always uses a forward slash character as its separator, so 
+    // we need to replace any platform-specific separator characters before
+    // attemping to compare
+    //
+    String fullTempFilename = buildPath.replace(File.separatorChar, '/') 
+      + "/" + className + ".java";
+
+    if (s.indexOf(fullTempFilename) == 0) {
+      String s1 = s.substring(fullTempFilename.length() + 1);
+      int colon = s1.indexOf(':');
+      int lineNumber = Integer.parseInt(s1.substring(0, colon));
+      //System.out.println("pde / line number: " + lineNumber);
+
+      //String s2 = s1.substring(colon + 2);
+      int err = s1.indexOf("Error:");
+      if (err != -1) {
+        //err += "error:".length();
+        String description = s1.substring(err + "Error:".length());
+        description = description.trim();
+        System.out.println("description = " + description);
+        exception = new PdeException(description, lineNumber-1);
+        editor.error(exception);
+
+      } else {
+        System.err.println("i suck: " + s);
+      }
+
+    } else {
+      // this isn't the start of an error line, so don't attempt to parse
+      // a line number out of it
+    }
+  }
+}