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FulltextHelperDocumentStructure.java
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FulltextHelperDocumentStructure.java
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/*
* Copyright (c) 2002-2017 "Neo Technology,"
* Network Engine for Objects in Lund AB [http://neotechnology.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.kernel.api.impl.fulltext;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.NumericDocValuesField;
import org.apache.lucene.document.StringField;
import org.apache.lucene.index.IndexableField;
import org.apache.lucene.index.Term;
import java.util.Iterator;
import java.util.Map;
import org.neo4j.values.storable.Value;
import org.neo4j.values.storable.Values;
import static org.apache.lucene.document.Field.Store.NO;
import static org.apache.lucene.document.Field.Store.YES;
class FulltextHelperDocumentStructure
{
static final String ID_KEY = "id";
private static final ThreadLocal<DocWithId> perThreadDocument = ThreadLocal.withInitial( DocWithId::new );
private FulltextHelperDocumentStructure()
{
}
private static DocWithId reuseDocument( long id )
{
DocWithId doc = perThreadDocument.get();
doc.setId( id );
return doc;
}
public static Document documentRepresentingProperties( long id, Map<String,Object> values )
{
DocWithId document = reuseDocument( id );
document.setValues( values );
return document.document;
}
static Field encodeValueField( String propertyKey, Value value )
{
return BloomFieldEncoding.encodeField( propertyKey, value );
}
private static class DocWithId
{
private final Document document;
private final Field idField;
private final Field idValueField;
private DocWithId()
{
idField = new StringField( ID_KEY, "", NO );
idValueField = new NumericDocValuesField( ID_KEY, 0L );
document = new Document();
document.add( idField );
document.add( idValueField );
}
private void setId( long id )
{
removeAllValueFields();
idField.setStringValue( Long.toString( id ) );
idValueField.setLongValue( id );
}
private void setValues( Map<String,Object> values )
{
for ( Map.Entry<String,Object> entry : values.entrySet() )
{
Field field = encodeValueField( entry.getKey(), Values.of( entry.getValue() ) );
document.add( field );
}
}
private void removeAllValueFields()
{
Iterator<IndexableField> it = document.getFields().iterator();
while ( it.hasNext() )
{
IndexableField field = it.next();
String fieldName = field.name();
if ( !fieldName.equals( ID_KEY ) )
{
it.remove();
}
}
}
}
public static Term newTermForChangeOrRemove( long id )
{
return new Term( ID_KEY, "" + id );
}
}