/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.mahout.cf.taste.impl.similarity.file;
import org.apache.mahout.cf.taste.impl.similarity.GenericItemSimilarity;
import java.io.File;
import java.io.IOException;
import java.util.Iterator;
/**
* {@link Iterable} to be able to read a file linewise into a {@link GenericItemSimilarity}
*/
final class FileItemItemSimilarityIterable implements Iterable<GenericItemSimilarity.ItemItemSimilarity> {
private final File similaritiesFile;
FileItemItemSimilarityIterable(File similaritiesFile) {
this.similaritiesFile = similaritiesFile;
}
@Override
public Iterator<GenericItemSimilarity.ItemItemSimilarity> iterator() {
try {
return new FileItemItemSimilarityIterator(similaritiesFile);
} catch (IOException ioe) {
throw new IllegalStateException("Can't read " + similaritiesFile, ioe);
}
}
}