Highlighter.java

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package org.libcsdbg.jtracer;

import java.util.Vector;
import java.util.Hashtable;

import java.io.File;
import java.io.FileReader;
import java.io.BufferedReader;
import java.io.IOException;

public class Highlighter extends Hashtable<String, Vector<String>>
{
  private static final long serialVersionUID = 0x02;

  private static Highlighter current = null;


  Highlighter()
  {
    current = this;

    try {
      loadDictionary("type");
      loadDictionary("keyword");
      loadDictionary("extension");
    }

    catch (Throwable t) {
      Registry.debug(t);
    }
  }


  public void loadDictionary(String nm) throws IOException
  {
    File src = Registry.getCurrent().getResource("config/" + nm + ".dict");
    String path = src.getCanonicalPath();

    if (!src.isFile())
      throw new IOException("Dictionary '" + path + "' doesn't exist");

    else if (!src.canRead())
      throw new IOException("Can't read dictionary '" + path + "'");

    BufferedReader reader = new BufferedReader(new FileReader(src));
    Vector<String> words = new Vector<String>();

    while (true) {
      String line = reader.readLine();
      if (line == null)
        break;

      line = line.trim();
      if (line.length() > 0)
        words.add(line);
    }

    reader.close();
    put(nm, words);
  }


  public boolean lookup(String token, String nm, boolean regex)
  {
    Vector<String> words = get(nm);
    if (words == null)
      return false;

    for (int i = 0, cnt = words.size(); i < cnt; i++) {
      String exp = words.get(i);

      if (regex) {
        if (token.matches(exp))
          return true;
      }

      else if (token.equals(exp))
        return true;
    }

    return false;
  }


  public static Highlighter getCurrent()
  {
    return current;
  }
}