core/org.eclipse.smila.solr/lib/source/org/apache/solr/response/transform/BaseEditorialTransformer.java

package org.apache.solr.response.transform;


/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */

import org.apache.lucene.document.Field;
import org.apache.solr.common.SolrDocument;
import org.apache.solr.schema.FieldType;

import java.util.Set;

/**
 *
 *
 **/
public abstract class BaseEditorialTransformer extends TransformerWithContext {

  final String name;
  final String idFieldName;
  final FieldType ft;

  public BaseEditorialTransformer(String name, String idFieldName, FieldType ft) {
    this.name = name;
    this.idFieldName = idFieldName;
    this.ft = ft;
  }

  @Override
  public String getName()
  {
    return name;
  }

  @Override
  public void transform(SolrDocument doc, int docid) {
    //this only gets added if QueryElevationParams.MARK_EXCLUDED is true
    Set<String> ids = getIdSet();
    if (ids != null && ids.isEmpty() == false) {
      String key = getKey(doc);
      doc.setField(name, ids.contains(key));
    } else {
      //if we have no ids, that means we weren't marking, but the user still asked for the field to be added, so just mark everything as false
      doc.setField(name, Boolean.FALSE);
    }
  }

  protected abstract Set<String> getIdSet();

  protected String getKey(SolrDocument doc) {
    String key;
    Object field = doc.get(idFieldName);
    final Number n;
    if (field instanceof Field) {
      n = ((Field) field).numericValue();
    } else {
      n = null;
    }
    if (n != null) {
      key = n.toString();
      key = ft.readableToIndexed(key);
    } else if (field instanceof Field){
      key = ((Field)field).stringValue();
    } else {
      key = field.toString();
    }
    return key;
  }
}