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package org.apache.lucene.facet.search;
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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* Provider of arrays used for facet operations such as counting.
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* @lucene.experimental
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public class FacetArrays {
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private int[] intArray;
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private float[] floatArray;
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private IntArrayAllocator intArrayAllocator;
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private FloatArrayAllocator floatArrayAllocator;
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private int arraysLength;
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* Create a FacetArrays with certain array allocators.
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* @param intArrayAllocator allocator for int arrays.
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* @param floatArrayAllocator allocator for float arrays.
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public FacetArrays(IntArrayAllocator intArrayAllocator,
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FloatArrayAllocator floatArrayAllocator) {
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this.intArrayAllocator = intArrayAllocator;
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this.floatArrayAllocator = floatArrayAllocator;
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* Notify allocators that they can free arrays allocated
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* on behalf of this FacetArrays object.
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if (intArrayAllocator!=null) {
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intArrayAllocator.free(intArray);
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// Should give up handle to the array now
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if (floatArrayAllocator!=null) {
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floatArrayAllocator.free(floatArray);
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// Should give up handle to the array now
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* Obtain an int array, e.g. for facet counting.
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public int[] getIntArray() {
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if (intArray == null) {
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intArray = intArrayAllocator.allocate();
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arraysLength = intArray.length;
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/** Obtain a float array, e.g. for evaluating facet association values. */
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public float[] getFloatArray() {
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if (floatArray == null) {
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floatArray = floatArrayAllocator.allocate();
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arraysLength = floatArray.length;
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* Return the arrays length
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public int getArraysLength() {
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