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package org.apache.lucene.facet.enhancements.params;
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import java.util.ArrayList;
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import org.apache.lucene.facet.enhancements.CategoryEnhancement;
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import org.apache.lucene.facet.index.attributes.CategoryProperty;
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import org.apache.lucene.facet.index.params.CategoryListParams;
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import org.apache.lucene.facet.index.params.PerDimensionIndexingParams;
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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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* Default implementation of {@link EnhancementsIndexingParams}
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* @lucene.experimental
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public class DefaultEnhancementsIndexingParams extends
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PerDimensionIndexingParams implements EnhancementsIndexingParams {
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private List<CategoryEnhancement> enhancedCategories;
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* Construct with a certain {@link CategoryEnhancement enhancement}
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* @throws IllegalArgumentException if no enhancements are provided
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public DefaultEnhancementsIndexingParams(CategoryEnhancement... enhancements) {
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validateparams(enhancements);
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addCategoryEnhancements(enhancements);
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private void validateparams(CategoryEnhancement... enhancements) {
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if (enhancements==null || enhancements.length<1) {
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throw new IllegalArgumentException("at least one enhancement is required");
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* Construct with certain {@link CategoryEnhancement enhancements}
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* and {@link CategoryListParams}
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* @throws IllegalArgumentException if no enhancements are provided
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public DefaultEnhancementsIndexingParams(
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CategoryListParams categoryListParams,
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CategoryEnhancement... enhancements) {
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super(categoryListParams);
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validateparams(enhancements);
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addCategoryEnhancements(enhancements);
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public void addCategoryEnhancements(CategoryEnhancement... enhancements) {
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if (enhancedCategories == null) {
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enhancedCategories = new ArrayList<CategoryEnhancement>();
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for (CategoryEnhancement categoryEnhancement : enhancements) {
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enhancedCategories.add(categoryEnhancement);
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public List<CategoryEnhancement> getCategoryEnhancements() {
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if (enhancedCategories == null || enhancedCategories.isEmpty()) {
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return enhancedCategories;
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public List<Class<? extends CategoryProperty>> getRetainableProperties() {
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if (enhancedCategories == null) {
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List<Class<? extends CategoryProperty>> retainableProperties = new ArrayList<Class<? extends CategoryProperty>>();
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for (CategoryEnhancement enhancement : enhancedCategories) {
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if (enhancement.getRetainableProperty() != null) {
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retainableProperties.add(enhancement.getRetainableProperty());
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if (retainableProperties.isEmpty()) {
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return retainableProperties;