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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.LeafReaderContext;
import org.elasticsearch.ExceptionsHelper;
import org.elasticsearch.common.Nullable;
import org.elasticsearch.index.fielddata.IndexFieldDataService;
import org.elasticsearch.index.fielddata.ScriptDocValues;
import org.elasticsearch.index.mapper.MappedFieldType;
import org.elasticsearch.index.mapper.MapperService;
import java.io.IOException;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
public class LeafDocLookup implements Map<String, ScriptDocValues<?>> {
private final Map<String, ScriptDocValues<?>> localCacheFieldData = new HashMap<>(4);
private final MapperService mapperService;
private final IndexFieldDataService fieldDataService;
@Nullable
private final String[] types;
private final LeafReaderContext reader;
private int docId = -1;
LeafDocLookup(MapperService mapperService, IndexFieldDataService fieldDataService, @Nullable String[] types, LeafReaderContext reader) {
this.mapperService = mapperService;
this.fieldDataService = fieldDataService;
this.types = types;
this.reader = reader;
}
public MapperService mapperService() {
return this.mapperService;
}
public IndexFieldDataService fieldDataService() {
return this.fieldDataService;
}
public void setDocument(int docId) {
this.docId = docId;
}
@Override
public ScriptDocValues<?> get(Object key) {
// assume its a string...
String fieldName = key.toString();
ScriptDocValues<?> scriptValues = localCacheFieldData.get(fieldName);
if (scriptValues == null) {
final MappedFieldType fieldType = mapperService.fullName(fieldName);
if (fieldType == null) {
throw new IllegalArgumentException("No field found for [" + fieldName + "] in mapping with types " + Arrays.toString(types) + "");
}
// load fielddata on behalf of the script: otherwise it would need additional permissions
// to deal with pagedbytes/ramusagestimator/etc
scriptValues = AccessController.doPrivileged(new PrivilegedAction<ScriptDocValues<?>>() {
@Override
public ScriptDocValues<?> run() {
return fieldDataService.getForField(fieldType).load(reader).getScriptValues();
}
});
localCacheFieldData.put(fieldName, scriptValues);
}
try {
scriptValues.setNextDocId(docId);
} catch (IOException e) {
throw ExceptionsHelper.convertToElastic(e);
}
return scriptValues;
}
@Override
public boolean containsKey(Object key) {
// assume its a string...
String fieldName = key.toString();
ScriptDocValues<?> scriptValues = localCacheFieldData.get(fieldName);
if (scriptValues == null) {
MappedFieldType fieldType = mapperService.fullName(fieldName);
if (fieldType == null) {
return false;
}
}
return true;
}
@Override
public int size() {
throw new UnsupportedOperationException();
}
@Override
public boolean isEmpty() {
throw new UnsupportedOperationException();
}
@Override
public boolean containsValue(Object value) {
throw new UnsupportedOperationException();
}
@Override
public ScriptDocValues<?> put(String key, ScriptDocValues<?> value) {
throw new UnsupportedOperationException();
}
@Override
public ScriptDocValues<?> remove(Object key) {
throw new UnsupportedOperationException();
}
@Override
public void putAll(Map<? extends String, ? extends ScriptDocValues<?>> m) {
throw new UnsupportedOperationException();
}
@Override
public void clear() {
throw new UnsupportedOperationException();
}
@Override
public Set<String> keySet() {
throw new UnsupportedOperationException();
}
@Override
public Collection<ScriptDocValues<?>> values() {
throw new UnsupportedOperationException();
}
@Override
public Set<Map.Entry<String, ScriptDocValues<?>>> entrySet() {
throw new UnsupportedOperationException();
}
}
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