/*
* Licensed to Elastic Search and Shay Banon under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Elastic Search 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.
*/
package org.elasticsearch.search.lookup;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.search.Scorer;
import org.elasticsearch.ElasticSearchException;
import org.elasticsearch.ElasticSearchIllegalArgumentException;
import org.elasticsearch.common.collect.Maps;
import org.elasticsearch.index.cache.field.data.FieldDataCache;
import org.elasticsearch.index.field.data.DocFieldData;
import org.elasticsearch.index.field.data.FieldData;
import org.elasticsearch.index.field.data.NumericDocFieldData;
import org.elasticsearch.index.mapper.FieldMapper;
import org.elasticsearch.index.mapper.MapperService;
import java.io.IOException;
import java.util.Collection;
import java.util.Map;
import java.util.Set;
/**
* @author kimchy (shay.banon)
*/
public class DocLookup implements Map {
private final Map<String, FieldData> localCacheFieldData = Maps.newHashMapWithExpectedSize(4);
private final MapperService mapperService;
private final FieldDataCache fieldDataCache;
private IndexReader reader;
private Scorer scorer;
private int docId = -1;
DocLookup(MapperService mapperService, FieldDataCache fieldDataCache) {
this.mapperService = mapperService;
this.fieldDataCache = fieldDataCache;
}
public void setNextReader(IndexReader reader) {
if (this.reader == reader) { // if we are called with the same reader, don't invalidate source
return;
}
this.reader = reader;
this.docId = -1;
localCacheFieldData.clear();
}
public void setScorer(Scorer scorer) {
this.scorer = scorer;
}
public void setNextDocId(int docId) {
this.docId = docId;
}
public <T extends DocFieldData> T field(String key) {
return (T) get(key);
}
public <T extends NumericDocFieldData> T numeric(String key) {
return (T) get(key);
}
public float score() throws IOException {
return scorer.score();
}
public float getScore() throws IOException {
return scorer.score();
}
@Override public Object get(Object key) {
// assume its a string...
String fieldName = key.toString();
FieldData fieldData = localCacheFieldData.get(fieldName);
if (fieldData == null) {
FieldMapper mapper = mapperService.smartNameFieldMapper(fieldName);
if (mapper == null) {
throw new ElasticSearchIllegalArgumentException("No field found for [" + fieldName + "]");
}
try {
fieldData = fieldDataCache.cache(mapper.fieldDataType(), reader, mapper.names().indexName());
} catch (IOException e) {
throw new ElasticSearchException("Failed to load field data for [" + fieldName + "]", e);
}
localCacheFieldData.put(fieldName, fieldData);
}
return fieldData.docFieldData(docId);
}
public boolean containsKey(Object key) {
// assume its a string...
String fieldName = key.toString();
FieldData fieldData = localCacheFieldData.get(fieldName);
if (fieldData == null) {
FieldMapper mapper = mapperService.smartNameFieldMapper(fieldName);
if (mapper == null) {
return false;
}
}
return true;
}
public int size() {
throw new UnsupportedOperationException();
}
public boolean isEmpty() {
throw new UnsupportedOperationException();
}
public boolean containsValue(Object value) {
throw new UnsupportedOperationException();
}
public Object put(Object key, Object value) {
throw new UnsupportedOperationException();
}
public Object remove(Object key) {
throw new UnsupportedOperationException();
}
public void putAll(Map m) {
throw new UnsupportedOperationException();
}
public void clear() {
throw new UnsupportedOperationException();
}
public Set keySet() {
throw new UnsupportedOperationException();
}
public Collection values() {
throw new UnsupportedOperationException();
}
public Set entrySet() {
throw new UnsupportedOperationException();
}
}