com.github.steveash.jg2p.seq.SeqInputReader.java Source code

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Here is the source code for com.github.steveash.jg2p.seq.SeqInputReader.java

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/*
 * Copyright 2014 Steve Ash
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.github.steveash.jg2p.seq;

import com.google.common.base.Splitter;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Lists;
import com.google.common.io.CharSource;
import com.google.common.io.LineProcessor;

import com.github.steveash.jg2p.Word;
import com.github.steveash.jg2p.align.Alignment;
import com.github.steveash.jg2p.util.Zipper;

import java.io.IOException;
import java.util.List;

/**
 * @author Steve Ash
 */
public class SeqInputReader {

    private static final Splitter caretSplit = Splitter.on("^");
    private static final Splitter pipeSplit = Splitter.on("|");

    public static class AlignGroup {

        public final ImmutableList<Alignment> alignments;

        public AlignGroup(Iterable<Alignment> alignments) {
            this.alignments = ImmutableList.copyOf(alignments);
        }
    }

    public List<AlignGroup> readInput(CharSource source) throws IOException {
        return source.readLines(new LineProcessor<List<AlignGroup>>() {

            final List<AlignGroup> groups = Lists.newArrayList();
            String lastGroup = "";
            List<Alignment> aligns = Lists.newArrayList();

            @Override
            public boolean processLine(String line) throws IOException {
                List<String> fields = caretSplit.splitToList(line);
                if (!lastGroup.equals(fields.get(0))) {
                    lastGroup = fields.get(0);
                    if (!aligns.isEmpty()) {
                        groups.add(new AlignGroup(aligns));
                    }
                    aligns.clear();
                }
                Double score = Double.parseDouble(fields.get(1));
                Word input = Word.fromSpaceSeparated(fields.get(2));
                Iterable<String> graphs = pipeSplit.split(fields.get(3));
                Iterable<String> phones = pipeSplit.split(fields.get(4));

                aligns.add(new Alignment(input, Zipper.up(graphs, phones), score));
                return true;
            }

            @Override
            public List<AlignGroup> getResult() {
                if (!aligns.isEmpty()) {
                    groups.add(new AlignGroup(aligns));
                }
                return groups;
            }
        });
    }
}