edu.iu.lda.TopicCount.java Source code

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Here is the source code for edu.iu.lda.TopicCount.java

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/*
 * Copyright 2013-2016 Indiana University
 * 
 * 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 edu.iu.lda;

import it.unimi.dsi.fastutil.ints.Int2IntMap;
import it.unimi.dsi.fastutil.ints.Int2IntOpenHashMap;
import it.unimi.dsi.fastutil.objects.ObjectIterator;

import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;

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

import edu.iu.harp.resource.Writable;

public class TopicCount extends Writable {

    protected static final Log LOG = LogFactory.getLog(TopicCount.class);

    private final Int2IntOpenHashMap topicCount;

    public TopicCount() {
        topicCount = new Int2IntOpenHashMap();
    }

    public Int2IntOpenHashMap getTopicCount() {
        return topicCount;
    }

    @Override
    public int getNumWriteBytes() {
        // map size + map entries (
        // each is 4 + 4)
        return 4 + topicCount.size() * 8;
    }

    @Override
    public void write(DataOutput out) throws IOException {
        out.writeInt(topicCount.size());
        ObjectIterator<Int2IntMap.Entry> iterator = topicCount.int2IntEntrySet().fastIterator();
        while (iterator.hasNext()) {
            Int2IntMap.Entry entry = iterator.next();
            out.writeInt(entry.getIntKey());
            out.writeInt(entry.getIntValue());
        }
    }

    @Override
    public void read(DataInput in) throws IOException {
        int size = in.readInt();
        for (int i = 0; i < size; i++) {
            topicCount.put(in.readInt(), in.readInt());
        }
        topicCount.trim();
    }

    @Override
    public void clear() {
        topicCount.clear();
    }
}