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Capability.java
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Capability.java
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/*
* Copyright (c) 2002-2018 "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 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.kernel.impl.store.format;
import static org.neo4j.helpers.ArrayUtil.contains;
/**
* A collection of high level capabilities a store can have, should not be more granular than necessary
* for differentiating different version from one another.
*/
public enum Capability
{
/**
* Store has schema support
*/
SCHEMA( false, CapabilityType.STORE ),
/**
* Store has dense node support
*/
DENSE_NODES( false, CapabilityType.FORMAT, CapabilityType.STORE ),
/**
* 3 bytes relationship type support
*/
RELATIONSHIP_TYPE_3BYTES( false, CapabilityType.FORMAT, CapabilityType.STORE ),
/**
* Lucene version 3.x
*/
LUCENE_3( false, CapabilityType.INDEX ),
/**
* Lucene version 5.x
*/
LUCENE_5( false, CapabilityType.INDEX ),
/**
* Point Geometries are an addition to the format, not a change
*/
POINT_PROPERTIES( true, CapabilityType.STORE ),
/**
* Temporal types are an addition to the format, not a change
*/
TEMPORAL_PROPERTIES( true, CapabilityType.STORE ),
/**
* Records can spill over into secondary units (another record with a header saying it's a secondary unit to another record).
*/
SECONDARY_RECORD_UNITS( false, CapabilityType.FORMAT );
private final CapabilityType[] types;
private boolean additive;
Capability( boolean additive, CapabilityType... types )
{
this.additive = additive;
this.types = types;
}
public boolean isType( CapabilityType type )
{
return contains( types, type );
}
/**
* Whether or not this capability is additive. A capability is additive if data regarding this capability will not change
* any existing store and therefore not require migration of existing data.
*
* @return whether or not this capability is additive.
*/
public boolean isAdditive()
{
return additive;
}
}