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InputEntity.java
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InputEntity.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.unsafe.impl.batchimport.input;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
/**
* Simple utility for gathering all information about an {@link InputEntityVisitor} and exposing getters
* for that data. Easier to work with than purely visitor-based implementation in tests.
*/
public class InputEntity implements InputEntityVisitor, Cloneable
{
public static final Object[] NO_PROPERTIES = new Object[0];
public static final String[] NO_LABELS = new String[0];
private final InputEntityVisitor delegate;
public InputEntity( InputEntityVisitor delegate )
{
this.delegate = delegate;
clear();
}
public InputEntity()
{
this( InputEntityVisitor.NULL );
}
public boolean hasPropertyId;
public long propertyId;
public boolean hasIntPropertyKeyIds;
public final List<Object> properties = new ArrayList<>();
public boolean hasLongId;
public long longId;
public Object objectId;
public Group idGroup;
public final List<String> labels = new ArrayList<>();
public boolean hasLabelField;
public long labelField;
public boolean hasLongStartId;
public long longStartId;
public Object objectStartId;
public Group startIdGroup;
public boolean hasLongEndId;
public long longEndId;
public Object objectEndId;
public Group endIdGroup;
public boolean hasIntType;
public int intType;
public String stringType;
private boolean end;
@Override
public boolean propertyId( long nextProp )
{
checkClear();
hasPropertyId = true;
propertyId = nextProp;
return delegate.propertyId( nextProp );
}
@Override
public boolean property( String key, Object value )
{
checkClear();
properties.add( key );
properties.add( value );
return delegate.property( key, value );
}
@Override
public boolean property( int propertyKeyId, Object value )
{
checkClear();
hasIntPropertyKeyIds = true;
properties.add( propertyKeyId );
properties.add( value );
return delegate.property( propertyKeyId, value );
}
@Override
public boolean id( long id )
{
checkClear();
hasLongId = true;
longId = id;
return delegate.id( id );
}
@Override
public boolean id( Object id, Group group )
{
checkClear();
objectId = id;
idGroup = group;
return delegate.id( id, group );
}
@Override
public boolean labels( String[] labels )
{
checkClear();
for ( String label : labels )
{
this.labels.add( label );
}
return delegate.labels( labels );
}
@Override
public boolean labelField( long labelField )
{
checkClear();
hasLabelField = true;
this.labelField = labelField;
return delegate.labelField( labelField );
}
@Override
public boolean startId( long id )
{
checkClear();
hasLongStartId = true;
longStartId = id;
return delegate.startId( id );
}
@Override
public boolean startId( Object id, Group group )
{
checkClear();
objectStartId = id;
startIdGroup = group;
return delegate.startId( id, group );
}
@Override
public boolean endId( long id )
{
checkClear();
hasLongEndId = true;
longEndId = id;
return delegate.endId( id );
}
@Override
public boolean endId( Object id, Group group )
{
checkClear();
objectEndId = id;
endIdGroup = group;
return delegate.endId( id, group );
}
@Override
public boolean type( int type )
{
checkClear();
hasIntType = true;
intType = type;
return delegate.type( type );
}
@Override
public boolean type( String type )
{
checkClear();
stringType = type;
return delegate.type( type );
}
@Override
public void endOfEntity() throws IOException
{
// Mark that the next call to any data method should clear the state
end = true;
delegate.endOfEntity();
}
public String[] labels()
{
return labels.toArray( new String[labels.size()] );
}
public Object[] properties()
{
return properties.toArray();
}
public Object id()
{
return hasLongId ? longId : objectId;
}
public Object endId()
{
return hasLongEndId ? longEndId : objectEndId;
}
public Object startId()
{
return hasLongStartId ? longStartId : objectStartId;
}
private void checkClear()
{
if ( end )
{
clear();
}
}
private void clear()
{
end = false;
hasPropertyId = false;
propertyId = -1;
hasIntPropertyKeyIds = false;
properties.clear();
hasLongId = false;
longId = -1;
objectId = null;
idGroup = Group.GLOBAL;
labels.clear();
hasLabelField = false;
labelField = -1;
hasLongStartId = false;
longStartId = -1;
objectStartId = null;
startIdGroup = Group.GLOBAL;
hasLongEndId = false;
longEndId = -1;
objectEndId = null;
endIdGroup = Group.GLOBAL;
hasIntType = false;
intType = -1;
stringType = null;
}
@Override
public InputEntity clone() throws CloneNotSupportedException
{
InputEntity clone = new InputEntity();
clone.hasPropertyId = hasPropertyId;
clone.propertyId = propertyId;
clone.hasIntPropertyKeyIds = hasIntPropertyKeyIds;
clone.properties.addAll( properties );
clone.hasLongId = hasLongId;
clone.longId = longId;
clone.objectId = objectId;
clone.idGroup = idGroup;
clone.labels.addAll( labels );
clone.hasLabelField = hasLabelField;
clone.labelField = labelField;
clone.hasLongStartId = hasLongStartId;
clone.longStartId = longStartId;
clone.objectStartId = objectStartId;
clone.startIdGroup = startIdGroup;
clone.hasLongEndId = hasLongEndId;
clone.longEndId = longEndId;
clone.objectEndId = objectEndId;
clone.endIdGroup = endIdGroup;
clone.hasIntType = hasIntType;
clone.intType = intType;
clone.stringType = stringType;
return clone;
}
@Override
public void close() throws IOException
{
delegate.close();
}
public int propertyCount()
{
return properties.size() / 2;
}
public Object propertyKey( int i )
{
return properties.get( i * 2 );
}
public Object propertyValue( int i )
{
return properties.get( i * 2 + 1 );
}
public void replayOnto( InputEntityVisitor visitor ) throws IOException
{
// properties
if ( hasPropertyId )
{
visitor.propertyId( propertyId );
}
else if ( !properties.isEmpty() )
{
int propertyCount = propertyCount();
for ( int i = 0; i < propertyCount; i++ )
{
if ( hasIntPropertyKeyIds )
{
visitor.property( (Integer) propertyKey( i ), propertyValue( i ) );
}
else
{
visitor.property( (String) propertyKey( i ), propertyValue( i ) );
}
}
}
// id
if ( hasLongId )
{
visitor.id( longId );
}
else if ( objectId != null )
{
visitor.id( objectId, idGroup );
}
// labels
if ( hasLabelField )
{
visitor.labelField( labelField );
}
else if ( !labels.isEmpty() )
{
visitor.labels( labels.toArray( new String[labels.size()] ) );
}
// start id
if ( hasLongStartId )
{
visitor.startId( longStartId );
}
else if ( objectStartId != null )
{
visitor.startId( objectStartId, startIdGroup );
}
// end id
if ( hasLongEndId )
{
visitor.endId( longEndId );
}
else if ( objectEndId != null )
{
visitor.endId( objectEndId, endIdGroup );
}
// type
if ( hasIntType )
{
visitor.type( intType );
}
else if ( stringType != null )
{
visitor.type( stringType );
}
// all done
visitor.endOfEntity();
}
}