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/*
 * Copyright [2017] Wikimedia Foundation
 *
 * 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.o19s.es.ltr;

import org.elasticsearch.index.query.QueryShardContext;

import java.util.Collections;
import java.util.Set;

/**
 * LTR queryShardContext used to track information needed for building lucene queries
 */
public class LtrQueryContext {
    private final QueryShardContext queryShardContext;
    private final Set activeFeatures;

    public LtrQueryContext(QueryShardContext context) {
        this(context, Collections.emptySet());
    }

    public LtrQueryContext(QueryShardContext context, Set activeFeatures) {
        this.queryShardContext = context;
        this.activeFeatures = activeFeatures;
    }

    public QueryShardContext getQueryShardContext() {
        return queryShardContext;
    }

    public boolean isFeatureActive(String featureName) {
        return activeFeatures == null || activeFeatures.isEmpty() || activeFeatures.contains(featureName);
    }

    public Set getActiveFeatures() {
        return activeFeatures==null? Collections.emptySet(): Collections.unmodifiableSet(activeFeatures);
    }
}