persistence.antlr.preprocessor.Tool Maven / Gradle / Ivy
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package persistence.antlr.preprocessor;
/* ANTLR Translator Generator
* Project led by Terence Parr at http://www.jGuru.com
* Software rights: http://www.antlr.org/license.html
*
*/
import java.io.*;
import persistence.antlr.collections.impl.Vector;
import java.util.Enumeration;
/** Tester for the preprocessor */
public class Tool {
protected Hierarchy theHierarchy;
protected String grammarFileName;
protected String[] args;
protected int nargs; // how many args in new args list
protected Vector grammars;
protected persistence.antlr.Tool antlrTool;
public Tool(persistence.antlr.Tool t, String[] args) {
antlrTool = t;
processArguments(args);
}
public static void main(String[] args) {
persistence.antlr.Tool antlrTool = new persistence.antlr.Tool();
Tool theTool = new Tool(antlrTool, args);
theTool.preprocess();
String[] a = theTool.preprocessedArgList();
for (int i = 0; i < a.length; i++) {
System.out.print(" " + a[i]);
}
System.out.println();
}
public boolean preprocess() {
if (grammarFileName == null) {
antlrTool.toolError("no grammar file specified");
return false;
}
if (grammars != null) {
theHierarchy = new Hierarchy(antlrTool);
for (Enumeration e = grammars.elements(); e.hasMoreElements();) {
String f = (String)e.nextElement();
try {
theHierarchy.readGrammarFile(f);
}
catch (FileNotFoundException fe) {
antlrTool.toolError("file " + f + " not found");
return false;
}
}
}
// do the actual inheritance stuff
boolean complete = theHierarchy.verifyThatHierarchyIsComplete();
if (!complete)
return false;
theHierarchy.expandGrammarsInFile(grammarFileName);
GrammarFile gf = theHierarchy.getFile(grammarFileName);
String expandedFileName = gf.nameForExpandedGrammarFile(grammarFileName);
// generate the output file if necessary
if (expandedFileName.equals(grammarFileName)) {
args[nargs++] = grammarFileName; // add to argument list
}
else {
try {
gf.generateExpandedFile(); // generate file to feed ANTLR
args[nargs++] = antlrTool.getOutputDirectory() +
System.getProperty("file.separator") +
expandedFileName; // add to argument list
}
catch (IOException io) {
antlrTool.toolError("cannot write expanded grammar file " + expandedFileName);
return false;
}
}
return true;
}
/** create new arg list with correct length to pass to ANTLR */
public String[] preprocessedArgList() {
String[] a = new String[nargs];
System.arraycopy(args, 0, a, 0, nargs);
args = a;
return args;
}
/** Process -glib options and grammar file. Create a new args list
* that does not contain the -glib option. The grammar file name
* might be modified and, hence, is not added yet to args list.
*/
private void processArguments(String[] incomingArgs) {
this.nargs = 0;
this.args = new String[incomingArgs.length];
for (int i = 0; i < incomingArgs.length; i++) {
if ( incomingArgs[i].length() == 0 )
{
antlrTool.warning("Zero length argument ignoring...");
continue;
}
if (incomingArgs[i].equals("-glib")) {
// if on a pc and they use a '/', warn them
if (File.separator.equals("\\") &&
incomingArgs[i].indexOf('/') != -1) {
antlrTool.warning("-glib cannot deal with '/' on a PC: use '\\'; ignoring...");
}
else {
grammars = antlrTool.parseSeparatedList(incomingArgs[i + 1], ';');
i++;
}
}
else if (incomingArgs[i].equals("-o")) {
args[this.nargs++] = incomingArgs[i];
if (i + 1 >= incomingArgs.length) {
antlrTool.error("missing output directory with -o option; ignoring");
}
else {
i++;
args[this.nargs++] = incomingArgs[i];
antlrTool.setOutputDirectory(incomingArgs[i]);
}
}
else if (incomingArgs[i].charAt(0) == '-') {
args[this.nargs++] = incomingArgs[i];
}
else {
// Must be the grammar file
grammarFileName = incomingArgs[i];
if (grammars == null) {
grammars = new Vector(10);
}
grammars.appendElement(grammarFileName); // process it too
if ((i + 1) < incomingArgs.length) {
antlrTool.warning("grammar file must be last; ignoring other arguments...");
break;
}
}
}
}
}