/*
* Copyright (C) 2014 Indeed Inc.
*
* 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.indeed.imhotep.metrics;
import com.indeed.flamdex.api.IntValueLookup;
/**
* @author jsgroth
*/
public abstract class AbstractBinaryOperator implements IntValueLookup {
public static final int INITIAL_BUFFER_SIZE = 32;
protected final IntValueLookup a;
protected final IntValueLookup b;
protected long[] buffer = new long[INITIAL_BUFFER_SIZE];
protected AbstractBinaryOperator(IntValueLookup a, IntValueLookup b) {
this.a = a;
this.b = b;
}
@Override
public long getMin() {
return Long.MIN_VALUE;
}
@Override
public long getMax() {
return Long.MAX_VALUE;
}
@Override
public void lookup(int[] docIds, long[] values, int n) {
if (buffer.length < n) buffer = new long[n];
a.lookup(docIds, values, n);
b.lookup(docIds, buffer, n);
combine(values, buffer, n);
}
protected abstract void combine(long[] values, long[] buffer, int n);
@Override
public long memoryUsed() {
return a.memoryUsed() + b.memoryUsed();
}
@Override
public void close() {
a.close();
b.close();
}
}