com.atilika.kuromoji.buffer.WordIdMap Maven / Gradle / Ivy
/*-*
* Copyright © 2010-2015 Atilika Inc. and contributors (see CONTRIBUTORS.md)
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License. A copy of the
* License is distributed with this work in the LICENSE.md file. You may
* also obtain a copy of the License from
*
* 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.atilika.kuromoji.buffer;
import com.atilika.kuromoji.io.IntegerArrayIO;
import java.io.IOException;
import java.io.InputStream;
import java.util.Arrays;
public class WordIdMap {
private final int[] indices;
private final int[] wordIds;
private final int[] empty = new int[] {};
public WordIdMap(InputStream input) throws IOException {
indices = IntegerArrayIO.readArray(input);
wordIds = IntegerArrayIO.readArray(input);
}
public int[] lookUp(int sourceId) {
int index = indices[sourceId];
if (index == -1) {
return empty;
}
return Arrays.copyOfRange(wordIds, index + 1, index + 1 + wordIds[index]);
}
}