Wojciech Jaworski / ENIAM

package is2.io;

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;

import is2.data.Instances;
import is2.data.SentenceData09;
import is2.util.DB;

/**
 * This class reads files in the CONLL-08 and CONLL-09 format.
 *
 * @author Bernd Bohnet
 */
public class CONLLReader04 {

	private static final String US = "_";
	private static final String REGEX = "\t";
	public static final String STRING = "*";
	public static final String PIPE = "\\|";
	public static final String NO_TYPE = "<no-type>";
	public static final String ROOT_POS = "<root-POS>";
	public static final String ROOT_LEMMA = "<root-LEMMA>";
	public static final String ROOT = "<root>";
	public static final String EMPTY_FEAT = "<ef>";

	private static final String NUMBER = "[0-9]+|[0-9]+\\.[0-9]+|[0-9]+[0-9,]+";
	private static final String NUM = "<num>";

	private BufferedReader inputReader;

	public static final int TASK08 = 8;
	public static final int TASK09 = 9;

	public static boolean normalizeOn = true;

	private int lineNumber = 0;

	public CONLLReader04() {
	}

	public CONLLReader04(String file) {
		lineNumber = 0;
		try {
			inputReader = new BufferedReader(new InputStreamReader(new FileInputStream(file), "UTF-8"), 32768); // ,"UTF-8"
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	public CONLLReader04(String file, int task) {
		this(file);
	}

	public void startReading(String file) {
		lineNumber = 0;
		try {
			inputReader = new BufferedReader(new InputStreamReader(new FileInputStream(file), "UTF-8"), 32768);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	/**
	 * i.forms[heads[l]-1]+" "+rel+" "+ Read a instance
	 * 
	 * @return a instance
	 * @throws Exception
	 */
	public SentenceData09 getNext() throws Exception {

		try {

			ArrayList<String[]> lineList = new ArrayList<String[]>();

			String line = inputReader.readLine();

			while (line != null && line.length() < 2) {
				line = inputReader.readLine();
				lineNumber++;
				System.out.println("skip empty line at line " + lineNumber);
			}

			while (line != null && line.length() != 0 && !line.startsWith(STRING) && !line.startsWith(REGEX)) {
				lineList.add(line.split(REGEX));
				line = inputReader.readLine();
				lineNumber++;
			}

			int length = lineList.size();

			if (length == 0) {
				inputReader.close();
				return null;
			}

			SentenceData09 it = new SentenceData09();

			// column content
			// 1 id
			// 2 form
			// 3 lemma
			// 4 cpos-tag
			// 5 pos-tog
			// 6 feats
			// 7 head
			// 8 deprel

			it.forms = new String[length + 1];

			it.plemmas = new String[length + 1];
			it.gpos = new String[length + 1];
			it.labels = new String[length + 1];
			it.heads = new int[length + 1];
			it.pheads = new int[length + 1];
			it.plabels = new String[length + 1];

			it.ppos = new String[length + 1];
			it.lemmas = new String[length + 1];
			it.fillp = new String[length + 1];
			it.feats = new String[length + 1][];
			it.ofeats = new String[length + 1];
			it.pfeats = new String[length + 1];

			it.forms[0] = ROOT;
			it.plemmas[0] = ROOT_LEMMA;
			it.fillp[0] = "N";
			it.lemmas[0] = ROOT_LEMMA;

			it.gpos[0] = ROOT_POS;
			it.ppos[0] = ROOT_POS;
			it.labels[0] = NO_TYPE;
			it.heads[0] = -1;
			it.plabels[0] = NO_TYPE;
			it.pheads[0] = -1;
			it.ofeats[0] = NO_TYPE;

			// root is 0 therefore start with 1

			for (int i = 1; i <= length; i++) {

				String[] info = lineList.get(i - 1);

				it.forms[i] = info[0]; // normalize(

				it.lemmas[i] = "_";
				it.plemmas[i] = "_";

				// 3 cpos

				it.gpos[i] = info[1];
				it.ppos[i] = info[1];

				it.ofeats[i] = "_";

				it.feats[i] = null;
				// it.feats[i] =info[5].split(PIPE);
				it.pfeats[i] = "_";

				if (info[2].equals(US))
					it.heads[i] = -1;
				else
					it.heads[i] = Integer.parseInt(info[2]);// head

				it.labels[i] = info[3];

			}
			return it;

		} catch (Exception e) {
			System.out.println("\n!!! Error in input file at line : " + lineNumber + " " + e.toString());
			e.printStackTrace();
			throw new Exception();
			// return null;
		}

	}

	/**
	 * Read a instance an store it in a compressed format
	 * 
	 * @param is
	 * @return
	 * @throws IOException
	 */
	final public SentenceData09 getNext(Instances is) throws Exception {

		SentenceData09 it = getNext();

		if (is != null)
			insert(is, it);

		return it;

	}

	final public boolean insert(Instances is, SentenceData09 it) throws IOException {

		try {

			if (it == null) {
				inputReader.close();
				return false;
			}

			int i = is.createInstance09(it.length());

			for (int p = 0; p < it.length(); p++) {

				is.setForm(i, p, normalize(it.forms[p]));
				is.setGPos(i, p, it.gpos[p]);

				if (it.ppos[p] == null || it.ppos[p].equals(US)) {
					is.setPPoss(i, p, it.gpos[p]);
				} else
					is.setPPoss(i, p, it.ppos[p]);

				if (it.plemmas[p] == null || it.plemmas[p].equals(US)) {
					is.setLemma(i, p, normalize(it.forms[p]));
				} else
					is.setLemma(i, p, normalize(it.plemmas[p]));

				is.setFeats(i, p, it.feats[p]);

				is.setFeature(i, p, it.ofeats[p]);

				is.setRel(i, p, it.labels[p]);
				if (it.plabels != null)
					is.setPRel(i, p, it.plabels[p]);
				is.setHead(i, p, it.heads[p]);
				if (it.pheads != null)
					is.setPHead(i, p, it.pheads[p]);

				if (it.fillp != null && it.fillp[p] != null && it.fillp[p].startsWith("Y"))
					is.pfill[i].set(p);
				else
					is.pfill[i].clear(p);
			}

			if (is.createSem(i, it)) {
				DB.println("count " + i + " len " + it.length());
				DB.println(it.printSem());
			}
		} catch (Exception e) {
			DB.println("head " + it);
			e.printStackTrace();
		}
		return true;

	}

	public static String normalize(String s) {
		if (!normalizeOn)
			return s;
		if (s.matches(NUMBER))
			return NUM;
		return s;
	}

}