com.joliciel.talismane.parser.ParsingConstrainerImpl.java Source code

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Here is the source code for com.joliciel.talismane.parser.ParsingConstrainerImpl.java

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///////////////////////////////////////////////////////////////////////////////
//Copyright (C) 2013 Assaf Urieli
//
//This file is part of Talismane.
//
//Talismane is free software: you can redistribute it and/or modify
//it under the terms of the GNU Affero General Public License as published by
//the Free Software Foundation, either version 3 of the License, or
//(at your option) any later version.
//
//Talismane is distributed in the hope that it will be useful,
//but WITHOUT ANY WARRANTY; without even the implied warranty of
//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//GNU Affero General Public License for more details.
//
//You should have received a copy of the GNU Affero General Public License
//along with Talismane.  If not, see <http://www.gnu.org/licenses/>.
//////////////////////////////////////////////////////////////////////////////
package com.joliciel.talismane.parser;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Writer;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import java.util.TreeSet;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.joliciel.talismane.TalismaneSession;
import com.joliciel.talismane.utils.LogUtils;

class ParsingConstrainerImpl implements ParsingConstrainer {
    private static final Log LOG = LogFactory.getLog(ParsingConstrainerImpl.class);
    private static final long serialVersionUID = 1L;

    private Map<String, Set<String>> possibleTransitionMap = new HashMap<String, Set<String>>();
    private TransitionSystem transitionSystem;
    private transient ParserServiceInternal parseServiceInternal;
    private transient File file;

    @Override
    public Set<Transition> getPossibleTransitions(ParseConfiguration configuration) {
        String key = this.getKey(configuration);
        Set<String> transitionCodes = possibleTransitionMap.get(key);

        Set<Transition> transitions = new TreeSet<Transition>();
        if (transitionCodes != null) {
            for (String code : transitionCodes) {
                transitions.add(this.getTransitionSystem().getTransitionForCode(code));
            }
        } else {
            transitions = this.getTransitionSystem().getTransitions();
        }

        return transitions;
    }

    String getKey(ParseConfiguration configuration) {
        String key = null;
        if (configuration.getStack().isEmpty() && configuration.getBuffer().isEmpty()) {
            key = "|";
        } else if (configuration.getBuffer().isEmpty()) {
            key = configuration.getStack().getFirst().getTag().getCode();
        } else if (configuration.getStack().isEmpty()) {
            key = configuration.getBuffer().getFirst().getTag().getCode();
        } else {
            key = configuration.getStack().getFirst().getTag().getCode() + "|"
                    + configuration.getBuffer().getFirst().getTag().getCode();
        }
        return key;
    }

    @Override
    public TransitionSystem getTransitionSystem() {
        return transitionSystem;
    }

    public ParserServiceInternal getParseServiceInternal() {
        return parseServiceInternal;
    }

    public void setParseServiceInternal(ParserServiceInternal parseServiceInternal) {
        this.parseServiceInternal = parseServiceInternal;
    }

    @Override
    public void onNextParseConfiguration(ParseConfiguration parseConfiguration, Writer writer) {
        ParseConfiguration currentConfiguration = parseServiceInternal
                .getInitialConfiguration(parseConfiguration.getPosTagSequence());
        for (int i = 0; i < parseConfiguration.getTransitions().size(); i++) {
            String key = this.getKey(currentConfiguration);
            Set<String> transitionCodes = this.possibleTransitionMap.get(key);
            if (transitionCodes == null) {
                transitionCodes = new HashSet<String>();
                this.possibleTransitionMap.put(key, transitionCodes);
            }
            Transition transition = parseConfiguration.getTransitions().get(i);
            transitionCodes.add(transition.getCode());
            transition.apply(currentConfiguration);
        }
    }

    public void setFile(File file) {
        this.file = file;
    }

    @Override
    public void onCompleteParse() {
        if (this.transitionSystem == null)
            this.transitionSystem = TalismaneSession.getTransitionSystem();

        if (this.file != null) {
            try {
                ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(file, false));
                zos.putNextEntry(new ZipEntry("ParsingConstrainer.obj"));
                ObjectOutputStream oos = new ObjectOutputStream(zos);
                try {
                    oos.writeObject(this);
                } finally {
                    oos.flush();
                }
                zos.flush();
                zos.close();
            } catch (IOException ioe) {
                LogUtils.logError(LOG, ioe);
                throw new RuntimeException(ioe);
            }
        }
    }

    public static ParsingConstrainer loadFromFile(File inFile) {
        try {
            ZipInputStream zis = new ZipInputStream(new FileInputStream(inFile));
            zis.getNextEntry();
            ObjectInputStream in = new ObjectInputStream(zis);
            ParsingConstrainer parsingConstrainer = null;
            try {
                parsingConstrainer = (ParsingConstrainer) in.readObject();
            } catch (ClassNotFoundException e) {
                LogUtils.logError(LOG, e);
                throw new RuntimeException(e);
            }
            return parsingConstrainer;
        } catch (IOException ioe) {
            LogUtils.logError(LOG, ioe);
            throw new RuntimeException(ioe);
        }
    }

}