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Copy pathIxAverageDouble.java
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61 lines (49 loc) · 1.59 KB
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/*
* Copyright 2011-2016 David Karnok
*
* 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 ix;
import java.util.Iterator;
final class IxAverageDouble extends IxSource<Number, Double> {
IxAverageDouble(Iterable<Number> source) {
super(source);
}
@Override
public Iterator<Double> iterator() {
return new AverageFloatIterator(source.iterator());
}
static final class AverageFloatIterator extends IxSourceIterator<Number, Double> {
AverageFloatIterator(Iterator<Number> it) {
super(it);
}
@Override
protected boolean moveNext() {
Iterator<Number> it = this.it;
double accumulator = 0f;
long count = 0;
if (!it.hasNext()) {
done = true;
return false;
}
do {
accumulator += it.next().doubleValue();
count++;
} while (it.hasNext());
value = accumulator / count;
hasValue = true;
done = true;
return true;
}
}
}